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1. Position of electronic control valve lisa Mode Outdoor unit operation a unit Cooling Thermostat ON Performs SH control in the range of 55 480 pulses 1 Thermostat OFF 20 pulses 20 pulses Heating Thermostat ON Performs SC control in the range of 55 480 pulses 2 Thermostat OFF Returns the liquid refrigerant gradually into the outdoor 85 pulses unit in the range of 55 80 pulses Auto Auto Cooling Thermostat ON Performs SH control in the range of 55 480 pulses 1 20 pulses Thermostat OFF 20 pulses 20 pulses Auto Heating Thermostat ON Performs SC control in the range of 55 480 pulses 2 85 pulses i Thermostat OFF Returns the liquid refrigerant gradually into the outdoor 85 pulses unit in the range of 55 80 pulses Fan 20 pulses 3 20 pulses Stop 20 pulses 3 20 pulses 1 Type E1 Position of electronic control valve Soa Mode Outdoor unit operation an uni Cooling Thermostat ON Performs SH control in the range of 55 480 pulses 1 Thermostat OFF 20 pulses 20 pulses Heating Thermostat ON Performs SC control in the range of 55 480 pulses 4 Thermostat OFF 20 pulses 20 pulses Auto Auto Cooling Thermostat ON Performs SH control in the range of 55 480 pulses 1 20 pulses Thermostat OFF 20 pulses 20 pulses 3 Thermostat ON Performs SC control in the range of 55 480 pulses 4 85 pulses Auto Heating Thermostat OFF 20 pulses 20 pulses F
2. Outdoor unit control PCB Remote Remote controller controller e The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller to the outdoor unit PCB e Ordinary remote controllers or other controller are still required for the indoor units even when the outdoor unit maintenance remote controller is connected y 3 WAY SYSTEM 2 Functions Outdoor Unit Maintenance Remote Controller E Functions on the ordinary display 1 Functions Button operations can be used to perform the following functions e Start stop of all indoor units e Switching between cooling and heating e Test run of all indoor units e Double speed operation of indoor units Do not use for actual operation Doing so may damage the devices 2 Display The following can be displayed e Alarm details display e No of indoor outdoor units e Unit Nos of connected indoor outdoor units e Indoor outdoor unit operating status blinks when an alarm occurs Indoor unit thermostat ON e Display of individual outdoor unit alarms e Total operating time of outdoor unit compressors e Oil level of the outdoor unit oil sensor e Total outdoor unit power ON time e Outdoor unit microcomputer version other information E Temperature monitor e Displays the indoor outdoor unit sensor temperatures E Outdoor unit alarm history monitor e Displays the outdoor unit alarm history E Mode settings e Settin
3. TIMER OFF seres CZ RTC2 Fig 3 3 Remote Controller Servicing Functions E Sensor Temperature Display Function displayed regardless of whether unit is operating or stopped The procedure below displays the sensor temperatures from the remote controller indoor unit and outdoor unit on the remote controller lt Procedure gt Press and hold the and buttons simultaneously for 4 seconds or longer The unit No X X main unit No item code XX sensor address and servicing monitor HH XX sensor temperature are displayed on the remote controller LCD display See Fig 4 at right Press the temperature setting a Ly _ buttons and select the item code to the address of the sensor to monitor For the relationships between the sensor addresses and sensor types refer to the table of temperature sensors and addresses on the next page If group control is in effect press the CUNIT button to select the unit to monitor Press the temperature setting buttons to select the item code to change Press the button to return to normal remote controller display 3 WAY SYSTEM Remote Controller Functions CZ RTC2 Display shows a discharge temperature of OOXX at unit No 1 1 In case for example the display shows 0085 in the figure above a disch
4. 7 Open the valve on the refrigerant cylinder and open the high pressure gauge valve on the manifold gauge When charging has been completed with an amount of new refrigerant equal to the amount of recovered refrigerant or when charging with the same amount of new refrigerant has not been completed but no more refrigerant will enter the unit first turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 Then fully open all valves on the suction tube discharge tube liquid tube and balance tube However leave the balance tube fully closed if only a single outdoor unit is installed 8 If backup operation was engaged follow the instructions in 4 Backup Operation and perform backup operation recovery 9 If charging with an amount of new refrigerant equal to the amount of recovered refrigerant was not possible fully close the high pressure gauge valve on the manifold gauge Then while the unit is operating in Cooling mode open the low pressure gauge valve on the manifold gauge and charge with the designated amount of refrigerant A When charging with liquid refrigerant add refrigerant a little at a time in order to prevent liquid back flow 10 Fully close the low pressure gauge valves on the manifold gauge follow the instructions in 8 Charging Compressor Oil and charge with the necessary amount of oil Also add an amount of oil that is equivalent to the amount that was drained
5. 7 4 SC Circuit Electronic Control Valve MOV4 1 Operation to increase SC During cooling operation or mixed heating cooling operation when the outdoor unit heat exchanger is functioning as a condenser the liquid refrigerant which condenses at the outdoor unit heat exchanger flows into the receiver tank and SC sub cool supercooling approaches 0 C When SC is small and the length of the tubing connecting the indoor and outdoor units is long the pressure loss increases possibly resulting in lower capacities Therefore MOV4 operates at the double tube near the discharge port of the outdoor unit in order to increase SC MOVA uses the receiver tank detection sensor and low pressure sensor located near the accumulator to perform control in order to prevent liquid back up E Liquid refrigerant SC 0 Gas refrigerant returns to the accumulator A Refrigerant on the outer side evaporates a cooling the liquid refrigerant on the inner side Liquid refrigerant large SC Electronic control valve 4 expansion valve controls the flow 2 Operation when discharge temperature is high When the discharge temperature increases the SC circuit electronic control valve opens to 480 pulses This intentionally causes a mild liquid back up cooling the compressor This operation takes priority over operation intended to increase SC It is performed at top priority in all operating modes Liquid refrigerant Liquid refrig
6. Lo Hi SA Vacuum pump High pressure outlet port For 7 94mm dia connector O Low pressure outlet port For 7 94mm dia connector Fig 11 7 2 Evacuating Refrigerant Tubing Between Indoor and Outdoor Units Refer to the Installation Instructions that came with the outdoor unit E y 3 WAY SYSTEM 8 Charging Compressor Oil Outdoor Unit Repair Procedures 8 1 If Refrigerant Has Already Been Charged to Outdoor Unit Be sure to use an exclusive oil charging tank for charging compressor oil Prior to charging carry out vacuum drying inside the tank and take care that no air in the form of bubbles is permitted to enter the tank The oil charging procedures are given below The receiver tank used for maintenance may be used as an exclusive oil charging tank When installing the oil charging tank to the refrigerant system to DPR CV6230817937 serve as a safety bypass circuit for refrigerant connect it to the suction line service port carefully to avoid releasing refrigerant into the atmosphere Receiver tank CV6380152988 Perform oil charging Ara work carefully so that no Packless valve liquid refrigerant enters the charging tank Fig 12 1 Evacuation drying in oil charging tank With the lower side valve fully closed open the upper side valve and connect it to the vacuum pump via the manifold gauge valves as shown below Run the vacuum pump and evacuate the
7. Room C Room D Room E Room F The possible amount of leaked refrigerant gas in rooms A B and C is 10 kg The possible amount of leaked refrigerant gas in rooms D E and Fis 15 kg Indoor unit Room A Q RoHS This product does not contain any hazardous substances prohibited by the RoHS Directive You are requested to use ROHS compliant parts for maintenance or repair Z WARNING when the ceiling is 2 7 m high Min indoor floor area 2 The standards for minimum room volume are as follows No partition shaded portion El 2 When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas opening without a door or an opening 0 15 or larger than the respective floor spaces at the top or bottom of the door Outdoor unit L Refrigerant tubing Indoor unit Yay EE If an indoor unit is installed in each partitioned room and the refrigerant tubing is interconnected the smallest room of course becomes the object But when mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded the volume of the next smallest room becomes the object Small room Mechanical ventilation device Gas leak detector Refrigerant tubing a Outdoor unit Indoor unit Medium room Large room 3 The minimum indoor floor space compared with
8. push to release valve is provided for each connection port Use hoses to connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder Quickly connect each part to prevent air from entering the tubing 4d Recover remaining refrigerant from the inter unit tubing and indoor units using the refrigerant recovery unit To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit f f 3 WAY SYSTEM 5 Recovering Refrigerant Outdoor Unit Repair Procedures Discharge tube service port For 7 94mm dia connector Liquid tube service port For 7 94mm dia connector Manifold gauge Lo 2 Hi m IT a Zz Y a ee HA Refrigerant MT To O e recover unit fou Refrigerant el 5 recovery cylinder uction tube service port For 7 94mm dia connector Fig 9 5 3 Recovery of Refrigerant from Entire System 1 Turn off power to the entire outdoor system 2 Short circuit the AP Air Purge pins CN102 on the outdoor control PCB of all outdoor units then supply power to the outdoor units By short circuiting the AP pins and supplying power to the outdoor units the solenoid valve in each unit is forcibly opened and all remaining refrigerant can be recovered 3 If any unit has encountered a power failure follow the instructions in 5 1 Refrigerant Recovery Procedures fr
9. Charge the recovered refrigerant with the Refrigerant Recovery Unit by referring to the Installation Instruc tions that came with the outdoor unit and the refrigerant recovery unit 12 Replacing 4 way valve 3 WAY SYSTEM Outdoor Unit Repair Procedures 12 2 When the replacement is not available from the right side of the unit 1 2 Follow the instructions of 10 Compressor and remove the constant speed compressor 2 Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the 4 way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 3 KEIN 27 ny as Games s as ald NG Ar Fig 34 stant speed compressor 2 in the outdoor unit Prepare the brazing kit to disconnect the brazed parts 4 locations Az Protect the check valves as shown in the figure 34 Brazed parts 4 locations Ss Y es A AN a LA Check valve Ox lt we AFA E 77 ne th en A a e 4 way valve After replacing the 4 way valve follow the instructionsin 10 Compressor and reinstall the removed con OPO Oe gt 3 WAY SYSTEM Outdoor Unit Maintenance Remote Controller 3 OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER OVERVIEW nic ccs acae ite ey eee ea tenon beats Ree Cra a ee ei 3 2 FUNCHONS ss 0005000 0 eh nal ela O AA ae lee ee a 3 3 O
10. Defrost Control 4 3 1 Defrost control method This system uses the following 2 defrost methods 1 If there is 1 outdoor unit in the refrigerant system Reverse cycle defrost 2 If there are 2 or more outdoor units in the refrigerant system Outdoor unit cycle defrost 4 3 2 Constraint conditions 1 Frost detection does not occur for 5 minutes after operation starts 2 Defrost does not begin again for 35 minutes of A C operation after defrost was once completed 3 If all indoor units are stopped while defrost control is in effect or if the outdoor unit is stopped due to protection control or another reason then defrost control will not start for a minimum of 10 minutes after restart occurs 4 3 3 Frost detection A Frost detection does not occur for 5 minutes after operation starts B Frost is detected when either condition 1 or 2 below is met Condition 1 L2 line or below is detected twice each time continuously for 4 minutes when the compressor is operating Condition 2 L1 line or below is detected for a total of 60 minutes when the compressor is operating Heat exchange liquid temperature C a Defrosting operation lt The end temperature is different from the 6 end temperature above detection temperature 21 4 19 External temperature C The frost detection area is located under the thick lines 1 12 e 3 WAY SYSTEM 4 Special Controls Control Functions 4 3 4 Outdoor units where defros
11. Evacuati ng System Outdoor Unit Repair Procedures This procedure is carried out to ensure there is no remaining refrigerant or other gases nitrogen etc in the repaired outdoor unit and tubing 7 1 Evacuating Repaired Outdoor Unit 1 Check that each service valve of the suction tube discharge tube liquid tube and balance tube in the outdoor unit are fully closed 2 Connect the manifold gauge valves to the high pressure and low pressure sensor outlets of the outdoor unit Fig 11 3 Connect the manifold gauge valves to the vacuum pump If the AP pins CN102 on the outdoor control PCB have already been short circuited step 4 is not necessary 4 Turn off power to the repaired outdoor unit and short circuit the AP Air Purge pins on the outdoor control PCB By short circuiting the AP pins and turning on power to the outdoor unit all Ara electronic valves in the outdoor unit are forcibly opened and any remaining nitrogen gas can be recovered Failure to perform this procedure may result in nitrogen gas remaining in the refrigerant circuit and causing operating problems Therefore never skip this step 5 Turn the power ON at the outdoor unit where vacuum will be applied Then run the vacuum pump and continue evacuation until the vacuum condition falls to less than 101 kPa 755 mmHg 5 Torr To ensure proper evacuation refer to the operating instructions that came with the vacuum pump Manifold gauge
12. INV overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occur at an inverter frequency of less than 80 Hz after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause There is a strong possibility of a compressor failure An alarm occurs for current detection trouble when it is judged that no current is flowing after start DCCT is damaged In this case the cause is a DCCT failure Correction It is possible to resolve this trouble by limiting the maximum frequency Example CE o O P22 Alarm T pe Fan motor trouble Alarm conditions Fan motor start failure fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure Check Check the fan motor wiring the Hall IC wiring and the connector connections If the wiring and connectors are normal then check that the capacitor of the Hall IC input circuit is securely soldered onto the PCB Also use a tester and measure the resistance between fan HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction AA ane an Fan circuit on the outdoor unit control PCB In the 3 WAY SYSTEM the fan circuit PCB is integrated with the outdoor unit PCB Correction If the fan does not start the below corrections may be e
13. Indoor unit electronic control valve position Heat exchanger liquid 3 EA y E 7 U Z E iA th ir id iE iF mole a XA 7 x 4 4 i Ma NOTE o o o o o o o C Cc C Cc C Cc C Cc Hz OA and subsequent items are outdoor unit data OA 22 are for unit No 1 2A 42 are for unit No 2 4A 62 are for unit No 3 5 Outdoor Unit Alarm History Monitor Displays outdoor unit alarms only Does not display indoor unit alarms Check the indoor unit alarm histories separately using the indoor unit remote controllers or other control device lt Operating procedure gt Press and hold the CHECK button and button simultaneously for 4 seconds or longer to change to outdoor unit alarm history mode During temperature monitoring 4 displays The display and operations are the same as the monitoring of the alarm device history that is performed using the unit remote controller However the outdoor unit address appears instead of the unit No 2 Press the UNIT button and select the outdoor unit for alarm history monitoring Use the temperature setting La and _ _ buttons to select the item code for the alarm history The display shows the address of the selected outdoor unit the item code and the alarm history alarm data The outdoor unit address is displayed as R C XX YY System XX Outdoor unit system address R C XX Outdoor unit system addres
14. fans in the case of group control begins operating If group control is in effect press the UNIT button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating Press the temperature setting a a p a i v k buttons to select the item code to change Press the timer time 2 5 buttons to select the desired setting data For item codes and setting data refer to the following page Press the button The display stops blinking and remains lit and setting is completed Press the button to return to normal remote controller display 3 WAY SYSTEM Remote Controller Functions A 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions List of Detailed Setting Items Setting data Item code PR ae Description No Description Description 0001 Wey OE A 0002 2 WAY Cassette L1 0003 1 Way Cassette D1 Low Silhouette Ducted F1 Ligh Static Pressure 0005 Slim Low Static Ducted 0006 an E 0007 Ceiling T1 M1 ucted E1 Concealed Floor 0008 Wall mounted K1 0010 Floor Standing P1 0011 Standing R1 0001 22 Type 22 0003 28 Type 28 0005 36 Type 36 56 2 71 Type 73 0007 45 Type 45 0009 Type 56 0011 For S 71MP1E5 and S 71MR1E5 Indoor unit 80 Type 73 capacity 0012 Except S 71MP1E5 0013 90 Type 90 0015 112 Type 1
15. itis an important part of your job to install or service the system so it operates safely and efficiently For safe installation and trouble free operation you must O Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown O Observe all local state and national electrical codes O This equipment complies with EN IEC 61000 3 12 provided that the short circuit power Ssc is greater than or equals to the values corresponding to each model as shown in the table below at the interface point between the user s supply and the public system It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to supply with a short circuit power Ssc greater than or equals to the values corresponding to each model as shown in the table below U 8MF1E8 U 10MF1E8 U 12MF1E8 U 14MF1E8 U 16MF1E8 Ssc 3840kW 4710kW 5340kW 3580kW 2870kW O This equipment complies with EN IEC 61000 3 11 provided that the system impedance Zmax is less than or equal to the values corresponding to each model as shown in the table below at the interface point between the user s supply and the public system Consult with the supply authority for the system impedance Zmax U 8MF1E8 U 10MF1E8 U 12MF1E8 U 14MF1E8 U 16MF1E8 Zmax
16. locations 12 Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compressor was replaced Connect the manifold gauge to a nitrogen e S Gusnionribber A a Y remained 1 location cylinder and perform nitrogen gas replace rota y ment Protect the oil equalizer tube f Capillary tube assembly connection parts 13 Perform copper brazing at the 4 brazing locations Fig 31 Ara In the same way as during removal pay particular attention to protection of the check valve shown in the figure An O ring is mounted inside the oil equalizer tube connector parts It must be protected and do not lose it 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 14 Re install all components that were removed Re install the electrical component box in the same position as it was before AVES e Be sure to securely re install the thermal insulation and clamps for the capillary tube assembly in their original conditions as shown in Fig 28 e Be sure to check for looseness of the power terminal connection at the compres sor terminal plate and to check by pulling vertically on the connections If the terminals become disconnected easily replace the wiring Assy 15 Follow the instructions in 7 Evacuating System and apply vacuum to the outdoor unit where the compres sor was replaced D Replacing multiple compressors E Removal 1 Follow the instructions
17. such as installing a high pressure cutout in the circuit The hoses may be subject to internal pressure from the refrigerant inside the AN outdoor unit Check that the manifold gauge valves are fully closed beforehand A Schrader type push to release valve is provided at each connection port 3 Determine the outdoor unit where the unit No setting S007 3P DIP switch BLU on the outdoor unit control PCB is set to No 1 4 Short circuit the mode change pin CN101 on the outdoor unit control PCB of the No 1 unit Then short circuit the test run pin CNO23 to start operation Short circuiting the mode change pin ensures that heating cooling operation is not mixed and that all units are operating in either Heating or Cooling mode 5 Check the displays of the indoor unit remote controllers Check that all units are operating in Heating mode If all units are operating in Cooling mode perform the steps listed below With the 3 way valve it is difficult to determine whether operation is heating or CAUTION F cooling by touching the tubing 6 Release the short circuit at the test run pin on the outdoor unit control PCB of the No 1 unit Then short circuit the stop pin CN104 to stop operation 7 Short circuit the mode change pin CN101 on the outdoor unit control PCB of the No 1 unit Switching of the 4 way valve occurs immediately before operation starts Therefore it does not change at this time Mode change cannot
18. 0 0790 0 0790 0 0790 0 0790 0 0790 O Pay close attention to all warning and caution notices given in this manual ANTE This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage AN CAUTION If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause overheating at connection points and a poss
19. 2 C when the compressor has operated for 10 minutes immediately after start e When outdoor air temperature is below 4 C Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2 C when the compressor has operated for 30 minutes immediately after start Probable cause 1 Discharge sensor temperature detector is not inserted into the tube s sensor holder 2 Discharge sensor itself has suffered some kind of malfunction other than a cut wire Check 1 Check that the discharge temperature sensor is inserted into the sensor holder 2 Check that sufficient heat conducting putty is applied 3 Remove the discharge sensor from the sensor holder and expose the sensor to the outside air for approximately 5 minutes Check that the temperature detected by the sensor changes to match the outside air temperature However the sensor cannot detect temperatures at or below 0 C 1 Install the sensor into the holder and apply sufficient heat conducting putty 2 If the sensor is malfunctioning replace it Exampe ME AA A A SOS Notes The discharge temperature sensor is generally a sensor intended for accurate detection of high temperatures Therefore it will not accurately detect the temperature if the temperature at the measurement point is 20 C or below 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis HO6 Alarm Alarm code Low pressure switch activated Alarm conditions Probable
20. 3 The temperatures used to determine the area A AB B C for the evaporation temperature control shown in the figure on the next page and for condensation temperature control may vary depending on the relationships among factors including the difference between the room temperature setting and the indoor unit air intake temperature air intake temperature difference and the difference between the air discharge temperature setting and the air discharge temperature air discharge temperature difference 4 Definitions of evaporation temperature and condensation temperature Evaporation temperature Te Lowest heat exchanger temperature E1 E3 at any indoor unit Condensation temperature Tc Highest temperature among the outdoor unit pressure sensor temperature and the heat exchanger temperatures E1 at all indoor units where the heating thermostat is ON Ordinarily this is the outdoor unit pressure sensor temperature If multiple outdoor units are connected this is the highest outdoor unit pressure sensor temperature E3 temperature is not used for condensation temperature detection because it may indicate the temperature of superheated gas 3 WAY SYSTEM 3 Compressor Control Control Functions 3 6 1 Evaporation Temperature Te Control Control of Indoor Units Operating in Cooling Mode 16 0 Horsepower increase 12 0 11 1 permitted Area A 11 0 Horsepower increase lod permitted Area AB gt 6 0 Hor
21. 3 minutes after defrost ends Therefore the thermostat remains OFF for 3 minutes k Function when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the cooling mode within the same solenoid valve kit 2 Function when a common use solenoid valve kit is used and here are more than one 1 indoor unit in the heating mode within the same solenoid valve kit 1 13 E 3 WAY SYSTEM 4 Special Controls Control Functions 4 3 6 Outdoor unit cycle defrost Outdoor unit cycle defrost is performed in systems where 2 or more outdoor units are connected to the refrigerant system 1 Description of outdoor unit cycle defrost With this defrost method when 1 outdoor unit operates in defrost mode heat exchanger operating as a condenser another outdoor unit operates as an evaporator in the same way as in ordinary heating mode In this way the other outdoor unit is heating the unit where defrost is occurring When 1 outdoor unit completes defrost the other outdoor unit performs defrost in the same way Because the amount of time that the unit operates as an evaporator is very short there is little danger of frost forming again quickly Rather because the heat source is very powerful it is possible to shorten the defrost operating time 2 Defrost sequence Outdoor unit cycle defrost is always completed in 2 defrost operations A When there are 2 outdoor units First operation B When ther
22. 4 Adjust the primary side power Repair the power wiring 5 Replace the outdoor unit PCB 6 Correct the trouble In the case of a compressor failure it is likely that steps must be taken to correct the cause of the compressor failure such as liquid back up in order to prevent recurrence Be sure to check that there is no cause which may resuit in compressor locking 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H03 H13 H23 Alarm o P io al Alarm meaning Compressor 1 CT sensor disconnected or short circuit Compressor 2 CT sensor disconnected or short circuit Compressor 3 CT sensor disconnected or short circuit Alarm conditions Compressor 1 Current value of more than 18 0 A is detected while the compressor 1 is stopped Compressor 2 amp 3 Current value at compressor 2 and 3 is less than 2 0 A when 2 seconds or more had passed after the compressors began operation and output No current is detected even though the compressors are operating Probable cause 1 CT circuit failure including cut wiring etc 2 Disconnected CT circuit connector 3 Missing phase where CT circuit is connected 4 This CT circuit is connected to the connector of the other CT circuit 5 PCB failure 6 Electrical noise 1 CT circuit failure PCB failure Trouble Current value during compressor operation is below the threshold value Check e Check that the connector is not disconnected e Check the continuity of the CT circuit e
23. 6 3 2 Discharging Oil in Compressor Recover the refrigerant in the outdoor unit following the procedures in 5 Recovering Refrigerant Remove the compressor and discharge the oil in it Refer to 10 Compressor for detailed procedures 3 3 Checking the Oil Acceptance rejection criteria for the oil Condition of Condition of oil Judgment criteria for changing oil refrigeration cycle Color Odor Total acid value Hue Normal Yellowish None 0 02 or less 3 5 or less Abnormal Smells somewhat overheat operation Brownish not as strong as below Changing the oil and system cleaning with dry cores are necessary Motor burnout Brownish Pungent burnt odor Changing the oil and system cleaning blackish with dry cores are necessary It is difficult to measure the total acid value in the field therefore oil hue and odor are the rule of thumb Checking for carbon deposits and abrasive metal powder can additionally be used to assess the system condition f 3 WAY SYSTEM 4 Backup Operation Outdoor Unit Repair Procedures This system includes an emergency automatic backup function that allows the A C to operate during the period after trouble occurs until repairs are made However during repair and at other times use manual backup operation 4 1 Automatic Backup For details refer to the control functions section After the alarm details are sent to the control device control for automatic backup operation begins whe
24. ESTABA ASES Notes Recovery from this alarm occurs automatically when communication that contains the same address is not received for 3 minutes E26 Alarm Alarm code E26 Alarm meaning Mismatch in outdoor unit quantity Alarm conditions After power initialization the set outdoor unit quantity did not match the number of outdoor units detected on the outdoor unit main sub control wiring for 3 minutes or longer Probable cause 1 The outdoor unit quantity is set incorrectly peer 2 The outdoor unit main sub control wiring is cut Check 1 Check the outdoor unit quantity setting again Oe creck ne tor unt mato oolong Correction 1 Correct the incorrect outdoor unit quantity setting ee 2 Repair the outdoor unit main sub control wiring Notes Recovery from this alarm occurs automatically when the set outdoor unit quantity matches the number of outdoor units detected on the outdoor unit main sub control wiring E29 Alarm a 2 a rl Outdoor unit failed to receive communication from outdoor unit main Alarm conditions Outdoor unit communications from outdoor unit main were interrupted for 3 minutes or longer Probable cause 1 After initial communications were completed the outdoor unit main sub control wiring was cut 2 After initial communications were completed the RC connector became disconnected 3 The power at the outdoor unit main unit is turned OFF Check 1 Check the outdoor unit mai
25. IT El Cushion rubbers Bolts Temporary mounting 2 locations at back side each 1 piece 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures Brazing locations 3 Bolt Washer 1 Rubber washer 1 1 each at the 3 locations Protect the oil equalizer tube connectors Cushioning SI gt rubber guide Front view Fig 26 Set the remaining cushioning rubber beneath the new compressor leg at the locations shown in the figure 26 Remove the bolts which are temporarily fastening the 2 pieces of cushioning rubber and anchor the 3 com pressor legs using the bolts washers and rubber washers a Insert the pre shaped tube assembly at the 3 brazing locations indicated Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compres sor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement _ an DH 10 Perform copper brazing at the 3 brazing locations In the same way as during removal pay particular attention to protection of the oil Ara equalizing tube connector parts shown in the figure 26 An O ring is mounted inside the oil equalizer tube connector parts It must be pro tected and do not lose it 11 Follow the instructions in 6 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced 12 Re install all com
26. Probable cause Replace damaged components and correct the amount of charged refrigerant P05 Alarm Alarm code Reverse phase or missing phase detected Alarm conditions This alarm occurs when a reverse phase or missing phase is detected in the R S T phases High pressure switch activated The operation of the electronic circuit in the high pressure switch may short circuit the terminal depending on the pressure A pressure of 3 3 MPa or above will short circuit the terminal Once the terminal is short circuited it will remain in that state until the pressure goes below 2 6 MPa Failure of the check valve in the compressor discharge tube The service valve is closed Clogging of the outdoor heat exchanger during cooling An air short in the outdoor unit during cooling Failure of the outdoor fan during cooling Clogging of the air filter in the indoor unit during heating An air short in the indoor unit during heating Failure of the indoor fan during heating Clogging of the refrigerant circuit 10 Failure of the mechanical valve 11 Failure of the solenoid valve kit 12 Too much refrigerant has been charged 13 Failure of the high pressure switch 14 The wiring from the solenoid valve kit is actually connected to the different indoor unit 15 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Installation of the common use soleno
27. and for large deviation of the gauge pressure e During heating check whether the temperature is lower than the highest indoor unit E1 temperature The pressure detected by the high pressure sensor is the highest pressure in the system Therefore during heating the converted saturation temperature will never be lower than any indoor unit E1 temperature During cooling this temperature will never be lower than the outdoor unit liquid temperature 2 Failure to open the service valve clogged tubing valve leakage over charging In all of these cases an alarm occurs when there are rapid pressure fluctuations and tracking of the detected pressure is poor e Check the open closed status of the valve e Check for clogging of the tubing To check for clogging disconnect the high pressure sensor from the PCB and check whether the high pressure SW activates e Check for valve leakage and over charging When valve leakage or over charging occurs refrigerant is likely to accumulate in the outdoor units or indoor units resulting in a sudden rise in pressure at start that occurs before the refrigerant in the heat exchanger is discharged The representative valves to check are the liquid valves and mechanical valves 3 Outdoor unit PCB failure e The check items are the same as for a high pressure sensor malfunction A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was
28. and the resultant abnormal heating caused by HIC failure Check the power wiring and connector wiring If the wiring and connectors are normal use a tester to measure the resistance between the compressor HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction HIC If an HIC failure is found replace the PCB Exampe A Turn OFF the power and check the continuity of HIC and HIC on the HIC PCB L04 Alarm Outdoor system address duplication Alarm conditions Communication by inter unit control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause Incorrect outdoor system address settings Check the system address settings again Correct the system address settings Example A Notes Recovery from this alarm occurs automatically when communication that contains the same address as that unit is not received for 3 minutes after detection 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis L10 Alarm Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set or the setting is not allowed by the system Probable cause This alarm occurs because the capacity has not been set Check Connect the outdoor unit maintenance remote controller On the outdoor unit EEPROM detailed setting mode screen check the value for the outdoor unit capacity item code 81 Check that it is not set to
29. are low This occurs when the cooling capacity heat intake is high and the heating capacity heat discharge is low The outdoor heat exchanger capacity is decreased decreasing the system condensation capacity and raising the condensation temperature Tc The amount of heat discharge at the outdoor unit heat exchanger decreases decreasing the heat intake at the Cooling mode indoor units and raising the evaporation temperature Te Outdoor Unit Heat Exchanger Control Table when the outdoor unit heat exchanger is functioning as a condenser Low lt Condensation Temp Tc gt High Compressor stop lt e I CY E a 5 RP lt 2 Lo ha o o fi gt Ww Oo al 3 WAY SYSTEM 3 Compressor Control Control Functions 3 Increasing decreasing the heat exchanger capacity when the outdoor unit heat exchanger is functioning as an evaporator e Primarily when both the evaporation temperature Te and condensation temperature Tc are low This occurs when the cooling capacity heat intake is high and the heating capacity heat discharge is low The outdoor heat exchanger capacity is increased increasing the system evaporation capacity and raising the evaporation temperature Te The amount of heat intake at the outdoor unit heat exchanger increases increasing the heat discharge at the Heating mode indoor units and raising the condensation temperature Tc Primarily when both the evaporation temperature
30. compressor right Cut clamps Bolts Washer 1 Rubber washer 1 1 each at 3 locations Front view Crankcase heater located around the sensors Pay particular attention to protection of the check valve shown in the figure and to removal of the discharge sensor Ara Protect the sensors and the plates rubber lead wires clamps and other items 7 Disconnect the 3 brazed locations shown in the figure 27 First disconnect the 96 35 tube then disconnect the 912 7 and 922 22 tubes 8 Cut clamps as shown in the figure 27 and then pull the compressor toward you 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures E Installation 1 Remove the capillary tube assembly from the removed compressor at the brazed location shown in the figure 28 At this time remove the thermal insulation and sensor before disconnecting the tube AN Protect the oil equalizer tubing rubber clamps and other items An O ring is mounted inside the oil equalizer tube connector parts lt must be pro tected and do not lose it Insulator VITA Rubber A N a Capillary tube assembly ime NS LS a TAR SE i Sensor NN Brazed location Rubber Oil equalizer tube connector e SS Na X S N y Fig 28 2 Remove the tube cap brazed 2 pieces from the new compressor 3 Remove the hexagonal caps from the new compressor When removing the hexagonal caps hold
31. found at the check items for a high pressure sensor malfunction first try replacing the PCB and check again Trouble is corrected Outdoor unit PCB failure Trouble is not corrected High pressure sensor malfunction Continued 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Correction 1 Replace the high pressure sensor Caution Because the high pressure sensor connection employs a Schrader type valve it can be removed and replaced However the high pressure sensor can be easily damaged by high voltage therefore use sufficient caution with regard to static electricity 2 Replace the PCB 3 Correct the locations of problems in the refrigeration cycle e Correct locations where clogging or leakage has occurred e In the case of over charging recover refrigerant Adjust the amount of refrigerant Guide for over charging Be sure to connect the gauge to the high pressure outlet when checking for over charging During cooling The following does not apply when outdoor air temperature is low or when fan speed is controlled When both compressor 1 and compressor 2 are operating and the fan mode is 14 maximum fan speed then the high pressure saturation temperature should be approximately 15 C above the outdoor air temperature If it is 5 C or more above this level then it is possible that over charging may have occurred During heating There is an indoor unit where refrigerant flow is poor E1 temperature and dischar
32. from the oil separators 11 Remove the manifold gauge caution The connecting port employs a Schrader type valve When disconnecting the hose pressure will be applied from the refrigerant in the outdoor unit 12 Follow the instructions in 10 2 4 Dry core cleaning and perform dry core cleaning of all outdoor units 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 10 2 4 Dry core cleaning If burning or other failures occur repeatedly at compressors within the same system in many cases the cause is acid sludge carbon or other substances that remain in the refrigeration cycle as the result of insufficient cleaning If when the oil is inspected there is an outdoor unit where the oil color phase is 4 0 or higher or where a sharp odor is present carry out all steps below to perform dry core cleaning A If a ball valve is installed on the outdoor unit 1 Refer to 5 2 1 Cooling operation for all units and operate all outdoor units in either Heating or Cooling mode 2 Ifall units are operated in Cooling mode close first the liquid tube service valve then the ball valve on all outdoor units where dry cores will be attached If all units are operated in Heating mode close first the ball valve then the liquid tube service valve on all outdoor units where dry cores will be attached This step is performed in order to expel refrigerant from the tubing between the liquid tube service valve and the ball
33. gas into the circuit until 3 6 MPa pressure is reached If it is apparent that the nitrogen gas is not entering the repaired section interrupt the feeding Short circuit the AP pins CN102 on the outdoor unit control PCB turn on power to run the outdoor unit then resume feeding nitrogen 4 Apply soapy water to the repaired part such as a newly welded part and briefly inspect for any leakage If there are any leaks bubbles will show on the tubing surface To continue the air tight check after the brief leak inspection turn on power while short circuiting the AP pins Again feed nitrogen gas to obtain a system pressure of 3 6 MPa Then measure both the outdoor ambient temperature and the pressure in the system Leave the system in this state for 1 full day and night and again measure the outdoor ambient temperature and pressure to determine any reduced values During the inspection it is recommended that an awning or cover be used to shield the unit in case of rain If no problem is found purge all nitrogen from the system Manifold gauge Lo Hi SL High pressure outlet port EME ny For 7 94mm dia connector Ih 4 A It E Nitrogen gas Low pressure outlet port For 7 94mm dia connector Fig 10 6 2 Checking for Leakage in Refrigerant Tubing Between Indoor and Outdoor Units Refer to the Installation Instructions that came with the outdoor unit gt 3 WAY SYSTEM 7
34. is functioning as an evaporator When the valve determines that there are signs of excess refrigerant refrigerant is recovered at the receiver tank This valve is ON during heating operation and when the outdoor unit heat exchanger is functioning as an evaporator during mixed heating cooling operation It also turns ON in order to recover refrigerant at the outdoor unit after heating operation is stopped This valve is never ON at the same time as the RCV 1 The OFF conditions take priority over the ON conditions for this valve 2 This valve turns ON for 30 50 seconds after the outdoor unit stops and then turns OFF 3 This valve turns ON once after the outdoor unit starts A Heating operation e This valve turns ON when poor refrigerant flow at an indoor unit is detected and when symptoms of overcharge are detected After the valve turns OFF it will not turn ON again for 15 minutes B Mixed heating cooling operation e This valve turns ON when poor refrigerant flow at an indoor unit is detected and when symptoms of overcharge are detected if the heat exchanger at the outdoor unit is functioning as an evaporator 4 This valve turns OFF when an abnormal drop in discharge gas temperature is detected 5 This valve turns OFF when a drop in the detected receiver tank temperature 4 continues for a set length of time and when liquid back flow is judged to be occurring 1 17 A 7 3 WAY SYSTEM 6 Operation of Soleno
35. meaning of the colon display changes in the same way allowing unit Nos up to 80 to be displayed e Sample displays of the unit Nos of connected indoor units D e Display of unit No 1 ma a ma a D e Display of unit Nos 1 and 2 L pa M e Display of unit Nos 1 2 and 3 Um name ye e Display of unit Nos 1 2 3 and 4 L San a The colon display Unit Nos 1 20 21 40 changes automatically every 10 seconds The display does not change if higher unit numbers do not exist Pressing the button switches the display immediately to the next higher level even if 10 seconds have not passed E The total compressor operating time is displayed in 1 hour units using 8 digits e When the first 4 digits are displayed the bottom dot of the colon is lit Figure A e When the last 4 digits are displayed the colon points are not lit Figure B e The display of the first 4 and last 4 digits changes automatically every 10 seconds It can also be changed by pressing the mey button With the outdoor unit maintenance remote controller when connected to the outdoor unit the unit remote controller check functions will not operate 10 lt Total compressor operating time gt A and B are displayed alternately The example here 0000 0062 indicates 62 hours 4 Monitoring Operations Display the indoor unit and out
36. of the CT circuit e Install a normal CT in place of this CT and check If current is detected then the PCB can be judged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 3 Missing power phase Trouble This alarm primarily occurs when the T phase is missing When the R phase or S phase is missing CT trouble or PCB continuity trouble occur However this may not be true in the case of a missing phase caused by magnet SW trouble Check There is the possiblility of a magnet SW failure Therefore check the phase voltage at a location that is as close to the compressor as possible 4 Low power voltage Trouble In most cases this occurs when another constant speed compressor including compressors in other units or other device starts It also occurs when the power wiring is extremely long Check Check the voltage between each of the phases However if this trouble occurs when other devices or compressors start then an oscilloscope is required 5 PCB failure Trouble Check Check that the current value measured with the clamp meter is not lower than the value measured with the PC or remote controller 6 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument 1 Replace the compressor 2 Replace the CT circuit 3 Repair the power circuit
37. range between level 2 and until it has just become 1 Thus oil level 1 does not mean that the compressor is empty of oil When the compressor reaches oil level O during operation the system is likely to run out of oil within 5 to 10 minutes Check for oil leaks and make sure that refrigerant pipes are intact 5 1 2 Oil level detection Excess oil in the compressor is sent by bypass via a capillary tube to the low pressure circuit The temperature detected by a temperature sensor is used to determine whether it is oil warm or refrigerant cold 5 1 3 Self separator oil recovery control When a low oil level is detected this control recovers the oil which has accumulated in that oil separator and sends it to the compressor 1 Operation when oil level is 1 30 seconds after the oil level changes from 2 to 1 both the balance valve and recovery valve turn ON for up to 2 minutes However if the oil level becomes 2 during these 2 minutes this control is stopped When this control has been stopped it will not restart for 3 5 minutes unless the oil level becomes 0 2 Operation when oil level is 0 Both the balance valve and recovery valve turn ON and remain ON 5 1 4 Unit refrigerant oil recovery control utilizing balance tubes If the low oil level continues that outdoor unit oil receiving outdoor unit receives a supply of oil from operating outdoor units where the oil level is not low oil supply outdoor units 1
38. smaller difference between low pressure and high pressure that may be insufficient to cause refrigerant flow 3 The refrigerant circuit has become closed and refrigerant has not returned to the compressor In some cases when moisture enters the refrigerant circuit it can freeze at the low pressure locations and the resulting ice can block the circuit Y If the alarm occurs when there is sufficient refrigerant in the system 1 and 3 liquid refrigerant has definitely accumulated somewhere in the system Liquid refrigerant generally accumulates in high pressure locations In this case the high pressure gradually increases however it may not increase if the location where the liquid accumulates is sufficiently large Depending on the refrigerant saturation temperature it may also accumulate in low pressure locations In this case the high pressure is unlikely to increase 4 The wiring from the solenoid valve kit is actually connected to the different indoor unit 5 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Installation of the common use solenoid valve kit from a PC has not been made 1 Check that the service valve is open 2 Check that none of the valves solenoid valves mechanical valves in the main refrigerant circuit is closed due to an operation failure 3 Check that there is no possibility of foreign objects or water ha
39. the amount of refrigerant is roughly as follows When the ceiling is 2 7 m high m2 m3 125 337 5 120 324 0 115 310 5 110 297 0 105 283 5 100 270 0 95 256 0 90 243 0 85 229 5 Range below the 804 216 0 density limit of 75 E P E T o de 5 pete not needed 60 8 162 0 55 4 148 5 50 4 135 0 Range above the 45 121 5 density limit of 0 3 404 108 0 kg ms 35 94 5 Countermeasures 30 81 0 needed 25 67 5 20 54 0 15 40 5 10 27 0 5 13 5 0 0 0 0 10 20 30 40 50 60 70 80 90 100kg Total amount of refrigerant Section 1 Section 2 Section 3 Section 4 CONTENTS CONTROL FUNCTIONS 0 00 esti vee ee ie ek be eee eee ee 1 1 Ts Introduction o bee dee deed dee ay Faved a ate oes 1 2 2 Selecting Outdoor Unit for Operation 0 0 00 ee 1 3 3 Compressor Control 0 0 1 4 4 Special Controls csc cece eee eee SLA ee eae ae Ba a ad ees 1 11 5 Other Control Sue i miia NA 1 16 6 Operation of Solenoid Valves o ooooocooccocon 1 17 7 Outdoor Unit Electronic Control Valves MOV1 MOV2 MOV3 MOV4 1 19 8 Outdoor Fan Control 00 teens 1 21 9 Demand Control ii Raed o A A Ret aaah Gates ars 1 22 10 Indoor Unit Control of the Electronic Control Valve 00
40. the amount of recovered refrigerant NOTE To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit Faulty outdoor unit Other outdoor unit High pressure outlet port For 7 94mm dia connector Low pressure outlet port Manifold gauge For 7 94mm dia connector Liquid tube service port Lo Hi For 7 94mm dia connector la ET NT DI E Refrigerant recovery cylinder THY Se h a eel Measuring scale Connect from here to refrigerant recovery unit Fig 18 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 10 1 Compressor Trouble Diagnosis and Check Methods Generally compressor failures can be classified into the following categories 1 Mechanical trouble gt A Locking intrusion of foreign objects galling etc B Pressure rise failure damaged valve seal bearing or other component C Noise damaged stator rotor valve or other component 2 Electrical trouble gt A Coil burni
41. the fixing nut at the main unit side so as not to loose it with a wrench or spanner And then loosen and remove the hexagonal cap 4 Remove the oil equalizer tube connector parts along with the O ring from the removed compressor and mount them on the replaced new compressor Oil equalizer tube connector Hexagonal cap Fixing nut at the main unit side Fig 29 5 Install the crankcase heater onto the new compressor 6 Use only the bolts to temporarily fasten the cushioning rubber 2 pieces at the position as shown in the figure 30 7 Place the 2 pieces of cushioning rubber onto the legs of the new compressor 3 WAY SYSTEM Outdoor Unit Repair Procedures 10 Compressor Cushioning rubber Bolt Temporary mounting back side 2 locations 1 piece each y rA Ari 4 Y i t f ALL DA 4 p o C rankcase heater 8 Place the remaining cushioning rubber onto the new compressor at the location shown in the figure 31 9 Remove the bolts which are temporarily fas tening the 2 pieces of cushioning rubber and anchor the 3 compressor legs using the bolts washers and rubber washers Brazing 10 Insert the capillary tube assembly as shown locations 4 in the figure 31 at the 2 brazing locations indicated 11 Shape the tubes and insert them at the Bolt remaining 2 brazing locations Washer 1 Rubber washer 1 1 each used for 3
42. the outdoor unit PCB begins blinking 2 Conditions for refrigerant level judgment After judgment mode starts judgment occurs when all outdoor units in the system have been operating continuously for 30 minutes or longer Refrigerant level judgment requires that all outdoor units operate continuously for 30 minutes or longer This is in order to prevent incorrect adjustment of the refrigerant level based on false detection caused by refrigerant accumulation or recovery at stopped outdoor units stopped due to failures of functional elements After the judgment is displayed repeated judgment will occur under new operating conditions if all outdoor units continue operating Therefore the judgment display may change when later judgments occur Judgment mode is automatically canceled after 4 hours A 3 WAY SYSTEM 19 Other Functions Control Functions 3 Outdoor unit PCB LED indications in judgment mode LED1 LED2 Recommended response Insufficient gas Blinking Charge with refrigerant a little at a time OFF Blinking Recover refrigerant a little at a time Judgment not Blinking possible alternately When judgment mode is not engaged the LED indicates the normal display OFF or else indicates alarms or other information If the insufficient gas or overcharge judgment is not stable then recover refrigerant a little at a time when the overcharge display appears End refrigerant adjustment when the normal or insufficien
43. the unit be careful not to cause any abnormal deformation of the tube with flare nut Place the remaining cushioning rubber onto the new compressor at the position shown in the figure below Remove the bolts that are temporarily fastening the pieces of cushioning rubber inner 2 legs and anchor the 3 compressor legs using the bolts washers and rubber washers Remove the flare nut from the new compressor and connect the tube with flare nut Shape the tubes and insert them at the 2 brazing locations Connect a manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compres sor was replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement Perform copper brazing at the 2 brazing locations Follow the instructions in 6 Checking for Leakage After Repair and check for leaks at the outdoor unit where the compressor was replaced Ne At this time also check for leaks at the flare nut connection on the tube with flare nut 12 Re install all components that were removed Re install the electrical component box in the same position as it was before Be sure to check for looseness of the power terminal connection at the compressor Ne terminal plate and to check by pulling vertically on the connections If the termi nals become disconnected easily replace the wiring Assy 13 Follow the instructions in 7 Evacuating System and apply vacuum to the outdoor u
44. 0 or to a capacity that is not allowed Correction If item code 81 is incorrect use the outdoor unit maintenance remote controller and set it correctly After changing the setting be sure to reset both the indoor and outdoor power ECT J o SO Notes The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor unit EEPROM L11 Alarm Alarm meaning Installation or connection failure in a common use solenoid valve kit miswiring of indoor unit s remote control group Alarm conditions 1 The connection system with the multiple indoor units at only one solenoid valve kit and installation failure of common use solenoid valve kit L11 alarm occurs in the same series of all remote controllers 2 The connection system with the multiple indoor units at only one solenoid valve kit and wire connection that is not allowed L11 alarm occurs at the only target indoor unit 3 Remote control group wiring with a different refrigerant circuit s indoor unit L11 alarm occurs at the only target indoor unit Probable cause 1 Installation failure of common use solenoid valve kit setting from PC at test run operation and address setting is not made in the same series of all indoor units 2 Wiring shown below that are not allowed Remote control group wiring with a different solenoid valve kit connected to the indoor unit as Solenoid Solenoid Solenoid Solenoid Ci ki
45. 0000 eee 1 23 11 Solenoid Valve Kit Control 2 0 0 0 aeaaea 1 25 12 Indoor Special Control 0 0 0 tte eee 1 26 13 Discharge Temperature 0 00 ce eee 1 27 14 Current Protection i i iranis Gel eed de weedy wanna A eee ree 1 28 15 Low Oil Alarm diea a ale ab ae esd Se e Bader 1 29 16 Pressure Sensor Failure 0 00 c cect teens 1 30 17 Backup Operation cise dienian a E A A aa a a Ra EE 1 31 18 Service Maintenance Functions 00 00 cece teens 1 33 19 Other FUNCIONS coi bike Ges DR AGG SDR GE Yeates a Rey eked 1 36 OUTDOOR UNIT REPAIR PROCEDURES 22000 ee eeeeeees 2 1 1 Removing Panels ice cae A IAA We ee Are GA Bhs 2 2 2 Removing Electrical Component Box and Duct 00000 e eee eee 2 3 3 Discharging Compressor Oil 0000 00 tte eee 2 5 4 Backup Operation iaa base gee dies wea le ea nan tirita 2 6 5 Recovering Refrigerate cerati ae kes ea cece eee 2 9 6 Checking for Leakage After Repair o oococccocccoccncc 2 14 7 Evacuating System ooooococco tee eee 2 15 8 Charging Compressor Oil 0 2 20 0c 2 16 9 Pumping Out Refrigerant from Outdoor Unit 00000 c eee 2 20 10 COMPressO wise wee Piha eee ee ee Race das oe eae el 2 23 11 High and Low Pressure Sensors 000 c cece teen e ees 2 38 12 Replacing 4 way valve 1 eee 2 39 OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 3 1 Wis POVEDA Ba als Bean A Cane
46. 001 Ventilation fan operated by remote controller Wired remote controller 0000 Not used Body sensor is used sensor 0001 Remote control sensor is used Operation change 0000 Normal displayed or control in progress display 0001 Not displayed OFF reminder function 9900 None as for when weekly timer ST 0001 0000 used 0001 0001 Only stop time setting is enabled e temperature control OFF emperature control E Discharge temperature control ON 0000 RAP valve control OFF le te RAP valve control ON Heat exchanger 0013 Control temperature 13 C temperature for cold air 0014 Control temperature 14 C discharge Heat exchanger control point for control to Control temperature 25 C prevent cold air 0026 Control temperature 26 C Fan output switchin 0000 Output linked with fan ON when indoor unit fan is operating dd P 9 0001 Fan mode operation output P e start time Humidifier output OFF Drain pump stopped Humidifier output ON Drain pump operates Humidifier setting Humidifier output ON Drain pump operates for 1 minute when total humidifier operating time reaches 60 minutes Humidifier output ON Drain pump stopped Fiap op r ti n mod 0000 Standard setting pee 0001 Draft reduction mode Flap lower limit position is shifted upwards 0000 Smudging reduction mode Flap swing upper limit position is shifted downwards Flap swing mode 0001 Normal mode 0002 Draft reduct
47. 06 S 71MR1E5 0017 140 Type 140 0018 160 Type 160 0021 224 Type 224 ol ome 7 0001 Unit No 1 0002 Unit No 2 0003 Unit No 3 0030 Unit No 30 0099 Not set 0001 Unit No 1 0002 Unit No 2 0003 Unit No 3 0064 Unit No 64 0099 Not set 0000 Individual 1 1 Indoor unit with no group wiring Group control 0001 Main unit One of the group control indoor units address 0002 Sub unit All group control indoor units except for main unit 0099 Not set Shifts intake temperature by 10 C 009 Shifts intake temperature by 9 C Cooling Shifts intake temperature by 1 C varas 0000 No intake temperature shift 0001 Shifts intake temperature by 1 C 0009 Shifts intake temperature by 9 C 0010 Shifts intake temperature by 10 C Automatic 0000 Function disabled stop time 0001 Stops automatically 5 minutes after operation starts after A yy 0002 operation Stops automatically 10 minutes after operation starts Can be set 0123 Stops automatically 615 minutes after operation starts in 5 minute 0124 Stops automatically 620 minutes after operation starts units 0125 Stops automatically 625 minutes after operation starts address 0017 9023 000 900 0005 0030 009 000 000 address A 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions Description 0000 minutes 0001 minutes 010 10 C H Forced t
48. 1 Noise reduced by approx 2 3 dB from Approx 1 2 hp the catalog value 3 10 Noise reduced by approx 5 dB from the Approx 1 8 hp catalog value If Quiet mode is set the capacity will begin to decrease during heating operation at low outdoor temperatures when the outdoor air temperature is below standard conditions It is possible to set Quiet mode only for nighttime by using the snowfall sensor input terminal and a timer for quiet operation In this case operation is the Quiet mode determined by the above setting 18 2 Slime Countermeasure EEPROM 0C set only on the main unit This setting controls the operation of the drain pump Csen Jess SCS oo Normal control setting at time of factory shipment 18 3 Delayed Start for Each System Outdoor EEPROM 3E set only on outdoor unit No 1 The operation start time can be delayed according to the set system addresses This setting reduces the voltage drop by preventing multiple systems from starting at the same time when operation is restarted after multiple operating systems were stopped due to a power outage or other cause a ae No delayed start setting at time of factory shipment Start begins after 1 second x System address Start begins after 2 seconds x System address Start begins after 3 seconds x System address 18 4 Automatic Backup Outdoor EEPROM 48 set only on outdoor unit No 1 Automatic backup is set to occur at the time the unit is
49. 5 minutes as described in 5 2 1 Cooling operation for all units fully close the discharge line the liquid line ball valve and indoor unit ball valve 3 Run the unit in Cooling mode for 10 to 20 minutes more 4 Fully close the suction line ball valve and stop the operation of all units 5 Use hoses to connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder with each other Fig 8 Do each connection quickly to prevent air from entering the tubing Remaining refrigerant may create internal pressure therefore care should be CAUTION f taken when connecting the hoses 6 Recover the remaining refrigerant from the indoor unit using the refrigerant recovery unit came with the refrigerant recovery unit Ball valve separately purchased N Service port NOTE Suction tube H Outdoor i To determine completion of refrigerant unit Discharge tube i i i side f recovery follow the instructions that Liquid tba Solenoid Solenoid valve kit valve kit Refrigerant recovery Refrigerant recovery cylinder Indoor unit Fig 8 Bl 3 WAY SYSTEM 5 Recovering Refrigerant Outdoor Unit Repair Procedures 5 2 3 Refrigerant recovery procedures 2 for indoor unit with no ball valve Refrigerant in all indoor units and the refrigerant tubing circuit must be pumped into the outdoor unit The maximum refrigerant storage capacity
50. Control at the oil supply outdoor unit begins 3 minutes after the oil level at the outdoor unit changes to 0 or 1 Oil supply is performed for a maximum of 5 minutes from each unit 2 When oil supply is ended oil supply from that outdoor unit will not occur again for a period of No of outdoor units 1 x 5 minutes In addition oil supply is ended if the oil receiving outdoor unit oil level changes to 2 or if the oil supply outdoor unit oil level becomes low 3 The supply of oil is received from 1 unit at a time in sequence according to the order of priority of their inverter compressors 4 Operation during unit refrigerant oil recovery A Oil receiving outdoor unit The recovery valve turns ON and remains ON Because self separator oil recovery may occur simultaneously at the same unit both the balance valve and recovery valve turn ON at this time B Oil supply outdoor unit The balance valve turns ON and remains ON The bypass valve repeatedly turns ON and OFF according to a fixed cycle When the balance valve is ON the oil in the oil separator is discharged into the balance tube The bypass valve releases high pressure gas which forces this oil toward the oil receiving outdoor unit and flushes out the balance tubes The operation of this bypass valve allows oil to be supplied even when there is a difference in height between the outdoor units 5 1 5 Indoor unit refrigerant oil self recovery control Refer to the i
51. E8 and 16MF1E8 for models with 3 compressors be sure to protect check valves which are located adjacent to the 4 way valve while performing replacement work Models U 8MF1E8 12MF1E8 for models with1 or 2 compressor is not located near to the check valves therefore no protection is necessary 12 1 When the replacement is available from the right side of the unit 1 Remove the front panel of the outdoor unit then remove the right side panel of the unit 2 Follow the instructions in 9 Pumping Out Refrigerant from Outdoor Unit recover the refrigerant of the out door unit where the 4 way valve is located 3 Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the 4 way valve will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replace ment 4 Prepare the brazing kit to disconnect the brazed parts 4 locations A Protect the check valves as shown in the figure 33 Check valve 4 way valve y Brazed parts 4 locations Fig 33 5 After replacing the 4 way valve follow the instructions in 6 Checking for Leakage After Repair and 7 Evacuating System The outdoor unit after replaced 4 way valve shall be checked for gas leakage and per form system evacuation 6 Fully open service valves on the outdoor unit However if only one outdoor unit is installed leave the balance tube kept closed 7
52. Install a normal CT in place of this CT and check If current is detected then the PCB can be judged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 2 Crossed wiring or installation error Trouble When the compressor is stopped the current value at the other compressor is high Yx When this type of condition occurs seizing detection control takes priority 3 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument Correction 1 Replace the CT circuit 2 Replace the outdoor unit PCB 3 Correct the problem 1 The connector was not inserted after the PCB was replaced Use a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure HO5 H15 H25 Alarm Alarm code H05 H15 H25 Alarm meaning Compressor 1 discharge temperature sensor disconnected Compressor 2 discharge temperature sensor disconnected Compressor 3 discharge temperature sensor disconnected Alarm conditions e This alarm occurs when the discharge sensor temperature detector is not inserted into the tube s sensor holder or when the sensor itself has suffered some kind of malfunction other than a cut wire e When outdoor air temperature is 4 C or higher Alarm occurs if the temperature detected by the discharge sensor has changed by less than
53. Lock Overcurrent Lock current current current Alarm display 4 CT circuit detection trouble Alarm Description Compressor 1 inverter HO3 Occurs when an open CT circuit is detected in the inverter compressor compressor speed compressor when the constant speed compressor is operating speed compressor when the constant speed compressor is operating If the inverter compressor operating frequency is low the current value is also low Therefore this alarm is detected only when the compressor is stopped The operating current of the constant speed compressors is always higher than 1 5 A Therefore this alarm occurs as the result of an open circuit or failure h 3 WAY SYSTEM 15 Low Oil Alarm Control Functions Ordinary operation is resumed after system oil recovery control is completed If a stop occurs again as a result of a low oil level this alarm occurs This alarm will not occur if system oil recovery control has not already been performed However the alarm may not occur if the outdoor unit where the system oil recovery conditions were met is not the same as the outdoor unit which stopped due to low oil level In this case system oil recovery control may be performed again Alarm display H07 x 3 WAY SYSTEM 16 Pressure Sensor Failure Control Functions This system contains 2 types of pressure sensors a high pressure sensor and a low pressure sensor 1 High pressure sensor failure Identification o
54. MF1E8 16MF1E8 3 2 Compressor Selection Rules Because all outdoor units in this system contain an inverter compressor ordinarily there is no absolute order of priority for compressor operation 1 Normal compressor operation sequence set at time of shipment At least one inverter compressor is always operating in order to make fine adjustments to the system lower limit capacity When multiple outdoor units are connected each unit contains an inverter compressor Therefore the inverter which operates is the inverter with the shortest amount of operating time After the first inverter compressor has started the remaining inverter compressors and constant speed compressors start operating in order of the compressors which have the shortest amount of operating time Immediately after installation all compressors have an operating time of zero In this case the compressors start in the following sequence Inverter compressor gt Constant speed compressor 1 gt Constant speed compressor 2 lt Details gt The A C units are selected with consideration for the maximum load Therefore in most cases the maximum capacity is not required Ordinarily the operating range of an inverter compressor is approximately 25 Hz 90 Hz however operating efficiency declines somewhat in the high frequency operating range With consideration for these characteristics control of inverter compressors in this system is divided into two ranges according
55. O l a Crankcase heater Fig 23 e Protect the sensors and surrounding plates rubber lead wires clamps and other items Pay particular attention to protection of the oil equalizer tube connector parts and removal of the discharge sensor An O ring is mounted inside the oil equalizer tube connector parts It must be protected and do not lose it 7 Disconnect the 3 brazed locations shown in the figure 23 First disconnect the 96 35 tube then disconnect the 012 7 and 922 22 tubes 8 Pull the compressor toward you 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures E Installation 1 Remove the 2 brazed tube caps 2 pieces from the compressor 2 Remove hexagonal caps from the compressor When removing the hexagonal caps hold the fixing nut at the main unit side so as not to loose it with a wrench or spanner And then loosen and remove the hexagonal cap Hexagonal cap Oil equalizer tube connector parts Fixing nut at the main unit side 3 Remove the oil equalizer tube connector parts along with the O ring from the removed compressor and mount them on the replaced new compressor 4 Install the crankcase heater onto the new compressor 5 Temporary mount 2 cushion rubbers with bolts at the position as shown in the figure 25 Set up the leg of the new compressor onto the 2 cushion rubbers NS a S BY RL ANUN Sak AJ Kf A i 4 7 Ph T
56. Panasonic SERVICE MANUAL 410 3 WAY SYSTEM amp Y A Outdoor Unit Class 8HP 10HP 12HP 14HP 16HP Model Name U 8MF1E8 U 10MF1E8 U 12MF1E8 U 14MF1E8 U 16MF1E8 Indoor Unit Class 22 28 36 45 56 T3 106 140 160 4 Way Cassette S 22MU1E5 S 28MU1E5 S 36MU1E5 S 45MU1E5 S 56MU1E5 S 73MU1E5 S 106MU1E5 S 140MU1E5 S 160MU1E5 4 Way Cassette 60x60 S 22MY1E5 S 28MY1E5 S 36MY1E5 S 45MY1E5 S 56MY1E5 2 Way Cassette S 22ML1E5 S 28ML1E5 S 36ML1E5 S 45ML1E5 S 56ML1E5 S 73ML1E 1 Way Cassette S 28MD1E5 S 36MD1E5 S 45MD1E5 S 56MD1E5 S 73MD1E5 Low Silhouette Ducted S 22MF1E5 S 28MF1E5 S 36MF1E5 S 45MF1E5 S 56MF1E5 S 73MF1E5 S 90MF1E5 S 106MF1E5 S 140MF1E5 S 160MF1E5 Slim Low Static Ducted S 22MM1E5 S 28MM1E5 S 36MM1E5 S 45MM1E5 S 56MM1E5 Ceiling S 36MT1E5 S 45MT1E5 S 56MT1E5 S 73MT1E5 S 106MT1E5 S 140MT1E5 Wall Mounted S 22MK1E5 S 28MK1E5 S 36MK1E5 S 45MK1E5 S 56MK1E5 S 73MK1E5 S 106MK1E5 eel S 22MR1E5 S 28MR1E5 S 36MR1E5 S45MRIES S S6MRIES S 71MR1E5 Floor Standing S 22MP1E5 S 28MP1E5 S 36MP1E5 S 45MP1E5 S 56MP1E5 S 71MP1E5 Class 73 106 140 224 280 High Static Pressure s73me1es S 106ME1ES S 140ME1ES S 224ME1ES S 280ME1E5 85464849288000 REFERENCE NO SM830188 00 IMPORTANT Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person
57. STEM Control Functions Position of electronic control valve Fixed pulse for cooling according to indoor unit capacity Evaporator All indoor units 480 pulses Fixed pulse for cooling according to indoor unit capacity Fixed pulse for cooling according to indoor unit capacity Cooling Thermostat ON Fixed pulse for cooling according to indoor unit capacity Thermostat OFF Fixed pulse for cooling according to indoor unit capacity However position is 20 pulses for type El Heating Condenser Thermostat ON Fixed pulse for cooling according to indoor unit capacity Thermostat OFF Fixed pulse for cooling according to indoor unit capacity However position is 20 pulses for type El Cooling Heating Thermostat Auto ON Fixed pulse for cooling according to indoor unit capacity Thermostat OFF Cooling Fixed pulse for cooling according to indoor unit capacity However position is 20 pulses for type El Thermostat Auto ON Fixed pulse for cooling according to indoor unit capacity Heating Thermostat OFF Fixed pulse for cooling according to indoor unit capacity However position is 20 pulses for type E1 Stopped 20 pulses 5 Fan 20 pulses 5 Cooling Thermostat ON Performs SH control in the range of 55 480 pulses 1 Thermostat OFF 20 pulses Condenser Heating evapolator Thermostat ON 100 pulses T
58. Te and condensation temperature Tc are high This occurs when the cooling capacity heat intake is low and the heating capacity heat discharge is high The outdoor heat exchanger capacity is decreased decreasing the system evaporation capacity and lowering the evaporation temperature Te The amount of heat intake at the outdoor unit heat exchanger decreases decreasing the heat discharge at the Heating mode indoor units and lowering the condensation temperature Tc Outdoor Heat Exchanger Control Table when the outdoor heat exchanger is functioning as an evaporator Low lt Evaporation Temp Te High Compressor stop 3 6 4 Protection control Protection control consists of 2 types of protection air discharge temperature protection and current protection The limit values from this protection control are incorporated into the output compressor capacity increase decrease values that were calculated from control based on the temperature at the indoor unit heat exchanger roadmap control In some cases the control shown below may stop the compressor issue a warning or reduce the compressor capacity 1 Air discharge temperature protection During operation when only a single outdoor unit is installed the air discharge temperature level is determined the highest value is used and the compressor capacity is limited by using the air discharge temperature of the operating compressor as shown in the tables below Air disc
59. activated Reverse phase or missing phase detected Compressor 1 INV overcurrent Compressor 2 discharge temperature trouble Blinking Inspection Display on the remote CHECK blinking 1 controller CHECK blinking 2 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E06 Alarm e A Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit Alarm conditions Outdoor unit failed to receive serial communication signals from indoor unit Probable cause 1 The indoor unit power was cut OFF after initial communications were completed 2 An open circuit or short circuit occurred in the inter unit control wiring after initial communications were completed Check Check the power at the indoor and outdoor units and check the inter unit control wiring Correction J S ECT Notes This alarm is detected after initial communications are completed Therefore it does not occur in cases of disconnected serial connector no terminal unit set or other trouble that occurs before initial communications are completed If initial communications have not been completed alarm E04 occurs E12 Alarm Alarm code E12 Alarm meaning Automatic address setting start is prohibited Alarm conditions Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link Probable cause Automatic address setting is in progress at anot
60. allation change was made in the same series of all indoor units or not Check the software of address setting of PC In this case L11 alarm occurs at all indoor units remote controllers 2 Check the condition of remote control group wiring where L11 alarm occurs Check whether the group wiring is made with the indoor unit of a different solenoid valve kit or not Check whether the group wiring is made with the indoor unit of a different refrigerant circuit or not 3 Check the model of indoor unit connected to a remote control group where L11 alarm occurs Check whether type E1 indoor units are connected in the group wiring or not Check the model of indoor unit with the item code 10 for the detailed setting of the remote control Correction 1 Perform installation of common use solenoid valve kit from PC in the same series of all indoor units 2 With a common use solenoid valve kit change into the wiring that is allowed Example Notes This alarm may occasionally occur when connecting the common use solenoid valve kit 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis L17 Alarm Alarm conditions Probable cause 1 A unit that uses R407C refrigerant or a R22 model unit was connected by mistake 2 The connected unit is correct however the refrigerant type setting in the outdoor unit EEPROM item code 80 is incorrect Check 1 Check the refrigerant type at the connected unit 2 Use the outdoor unit mainten
61. an 20 pulses 20 pulses Stop 20 pulses 20 pulses 1 The SH target value is controlled so that the difference E3 E1 can become 2 6 C depending on the operation conditions However a decline in the required level may cause the SH target value to increase Be aware that in this case the electronic control valve is intended to close and this will be wrongly identified as gas shortages 2 The SC target value is controlled so that the difference pressure temp sensor E1 can become 5 20 C depending on the operating conditions 3 In the case of the common use electronic valve kit and more than one 1 indoor unit in the heating mode within the same electronic valve kit performs the control of returning the liquid refrigerant gradually into the outdoor unit in the range of 55 80 pulses 4 The SC target value is controlled so that the difference pressure temp sensor E1 can become 5 20 C depending on the operating conditions However if installation is combined with the except type El the value is controlled so that the difference pressure temp sensor E1 can become 5 40 C 10 Indoor Unit Control of the Electronic Control Valve 10 2 Special Control Control Tube refrigerant oil recovery control Reverse cycle defrost control Outdoor cycle defrost control Outdoor heat Subject indoor units exchanger Remote mode Controller Condenser All indoor units 3 WAY SY
62. ance remote controller and check the item code 80 refrigerant type If the setting is incorrect change it to R410A Correction J oo O Exampe fe Notes The outdoor unit s maintenance remote controller is required in order to set the refrigerant type in the outdoor unit EEPROM 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P03 P17 P18 Alarm Compressor 3 discharge temperature trouble Alarm conditions Inverter compressor 1 Temperature is 105 C or higher and pre trip stop has occurred Compressors 2 3 constant speed Pre trip stop occurs at 105 C or above The alarm occurs when pre trip stop occurs more than once However the pre trip counter is cleared if the compressor operates continuously for a specified length of time Probable cause 1 Clogging of liquid valve capillaries 2 Insufficient amount of refrigerant including trouble resulting from an insufficient initial charge and from gas leakage 3 Blocking of low pressure parts caused by intrusion of foreign objects moisture scale etc 4 Crossing tubing or PCB connectors with the other compressor thermistor 5 Expansion valve operation failure 6 Accumulation of refrigerant at stopped outdoor units 7 Compressor discharge sensor failure 8 PCB failure A D conversion failure 9 Electrical noise 1 Clogging of capillaries Trouble Compressor discharge temperature does not decrease even when the liquid valve is ON Check When the liquid valve is o
63. arge temperature from the outdoor unit stands for 85 C Fig 4 The temperature display appears as that are not connected for units If monitor mode is engaged while normal operation is in progress only the parts of the LCD display shown in the figure will change Other parts continue to display the same information as during normal operation e 3 WAY SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions Indoor unit sensors Outdoor unit sensors Unite Fite unio OE PERE oa a a Dragen OOOO O p e oee 2 c ac High pressure sensortemp o f o f a fhearocnengeres t Heat exchanger liquid 1 KEE Discharge temp Heat exchanger gas 2 07 Discharge temp setting Heat exchanger liquid 2 Outdoor air temp Ex Position of indoor unit electronic EE control valve For inspection 0 a sacra CSCS ss Forinspection SCS 56 Forinspection SCS 57 Dischargetemp3 O se ee CSCS IE se o se oF so EE e mb a Poe PS 3 WAY SYSTEM Trouble Diagnosis 5 TROUBLE DIAGNOSIS Contents of Remote Controller Switch Alarm Display lt lt 5 2 Outdoor Unit Control Panel LED Display 200s eee eee eee 5 4 Remote Controller Servicing Functions 0000 nannan nanne 5 5 3 WAY Alarm Codes 26 iis sie cee de ee ieee eee keen ee Ee ee ee Ke ees 5 7 Blinking Inspection Display 2 000 cece eee 5 27 Inspe
64. ater installation 0001 YN installed Humidifying when 0000 No setting at time of No setting at time of shipping heater thermostat is Permit prohibit 0000 Permit automatic heating cooling 0001 Gool onl 0000 0000 Normal y 0001 Cool only Set 1 for item code OD e In order to avoid water leakage and damage to the fan do not set for humidifying when the thermostat is OFF unless a vaporizing humidifier is used e Consider the device purpose and type when changing the settings Incorrect settings may result in malfunction Do not change any setting data that does not appear in this list 2 Detailed Settings Function This allows the system address indoor unit address and other settings to be made for the individual or group control indoor unit to which the remote controller used for detailed settings is connected When detailed settings mode is engaged operation stops at the individual or group control indoor unit where the remote controller used for detailed settings is connected Simple settings items can also be set at this time lt Procedure gt Press and hold the A and buttons simultaneously for 4 seconds or longer O EMB unit No 4 or AL L in the case of group control item code 1 and settings data fii XX are displayed blinking on the remote controller LCD display Fig 2 At this time the indoor unit fan or all indoor unit
65. ating cooling operation is not mixed and that all units are operating in either Heating or Cooling mode Check the displays of the indoor unit remote controllers Check that all units are operating in Cooling mode If all units are operating in Heating mode perform the steps listed below Ar With the 3 way valve it is difficult to determine whether operation is heating or cooling by touching the tubing Release the short circuit at the test run pin CNO23 on the outdoor unit control PCB of the No 1 unit Then short circuit the stop pin CN 104 to stop operation Short circuit the mode change pin CN101 on the outdoor unit control PCB of the No 1 unit Switching of the 4 way valve occurs immediately before operation starts Therefore it does not change at this time Mode change cannot be judged from the sound Short circuit the test run pin CNO23 on the outdoor unit control PCB of the No 1 unit Then check the displays of the indoor unit remote controllers Check that all units are operating in Cooling mode 5 2 2 Refrigerant recovery procedures 1 using indoor unit ball valve 1 If a ball valve with a service port has been provided in the indoor unit as shown in Fig 8 follow the instructions given in 2 through 6 below If the service port is instead located in the outdoor side follow the instructions in 5 2 3 Refrigerant recovery procedures 2 2 After running the unit in Cooling mode for about
66. ature then oil is judged to be present If Tcal is lower than the discharge temperature oil is judged to be not present Tcal 0 0254 T_oil LP 0 0298 T_oil LP 0 8842 T_oil 2 9953 LP 11 091 LP 436 94 2 9953 HP 11 091 HP 436 94 0 0254 HP 0 0298 HP 0 8842 These points are calculated from the oil temperature and compared with the discharge temperature High pressure Lower than the disc E temperature No oil Discharge temperature Higher than the discharge temperature Oil present ES Oil temperature Probable cause Insufficient amount of oil in the system 1 The length of system tubing exceeds the allowable tubing length 2 The difference in height between system units exceeds the allowable value 3 A large amount of oil was drained when a compressor was replaced 4 Oil has accumulated in a stopped outdoor unit and has not returned as a result of refrigerant circuit clogging or valve leakage at the stopped outdoor unit 5 A valve ORVR BALV BPB in the oil circuit has malfunctioned or there is clogging of the circuit capillaries which returns oil from the oil separator to the compressor 6 If an excessive amount or liquid returns to the compressor oil foaming may increase oil discharge The same occurs when the refrigerant proportion in the compressor is high at start due to an open circuit in the crank case heater 7 Oil sensor disconnected or open circuit 1 Check
67. be judged from the sound 8 Short circuit the test run pin CN023 on the outdoor unit control PCB of the No 1 unit Then check the displays of the indoor unit remote controllers Check that all units are operating in Cooling mode 9 Close the suction tube and balance tube on the outdoor unit to be repaired Then slowly close the liquid tube service valve 3 WAY SYSTEM 9 Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures 10 When the low pressure at the outdoor unit to be repaired reaches 0 5 MPa or below pull out the SCT connector 2P YEL CN231 from the outdoor unit control PCB of that outdoor unit Then immediately fully close the discharge tube valve on that outdoor unit Pulling out the SCT connector immediately stops all of the outdoor units While closing the valves the rise in discharge temperature or another factor may cause AN a protective device to activate stopping the operation of the outdoor unit If this occurs immediately fully close the discharge tube valve on the outdoor unit to be repaired 11 Connect the high pressure gauge side of the manifold gauge to the high pressure outlet port on the outdoor unit to be repaired and connect the manifold gauge to the refrigerant recovery device Be sure that no air enters the tubing at this time 12 Open both Hi and Lo side valves on the manifold gauge valves and recover the refrigerant remaining in the outdoor unit After that measure
68. by using the outdoor unit maintenance remote controller to change the outdoor unit EEPROM settings For information concerning EEPROM settings refer to the field application functions 2 2 Delayed Start of Outdoor Units 1 Delayed start of outdoor units in the same system If it is necessary to operate the compressors simultaneously at multiple outdoor units each outdoor unit will start beginning with unit No 1 after a delay of a number of seconds equivalent to the outdoor unit address The units do not start simultaneously This is in order to reduce the load on the power receiving equipment Outdoor unit ES Outdoor unit EA Outdoor unit address 1 address 2 address 3 Starts after 1 second Starts after 2 seconds Starts after 3 seconds 2 Delayed start for each system At the time of factory shipment delayed start for each system is not set to occur Therefore when systems are linked and multiple systems are selected for start simultaneously by the central control device all systems will begin operating simultaneously For this reason a function is included to delay the start time for each system address when systems are linked and multiple systems are selected for start by the central control device In order to enable this delay time it must be set in the EEPROM for each system Those systems where this setting has been made will start after a delay according to t
69. cal component box an arrangement that makes possible independent removal of the center duct 3 WAY SYSTEM 2 Removing Electrical Component Box and Duct Outdoor Unit Repair Procedures 7 Remove the lower duct 2 screws 1 tab Fig 5 1 Lower duct 8 Remove the upper duct 3 screws Fig 5 2 3 WAY SYSTEM ip Discharging Com pressor Oil Outdoor Unit Repair Procedures Discharged oil can be used for checking the condition of the system Based on the appearance and color of the discharged oil a judgment can be made on whether the system is operating normally or not 3 1 Discharging Oil from Oil Separator Recover the refrigerant from the outdoor unit following the procedure given in 5 Recovering Refrigerant Install hoses as indicated on the equipment and feed nitrogen gas gradually to provide pressure to the system from the low pressure outlet and collect oil in a pan or container Fig 6 e The low pressure outlet port is at the Lo side of the right side CAUTION e A faulty outdoor unit may remain pressurized The oil delivery port employs a Schrader type push to release valve Be careful to avoid accidental oil release when using the port A Packless valve or the like E Container fi Oil delivery port E For 6 35mm dia connector Manifold gauge Lo Hi SS Nitrogen gas Low pressure outlet port y For 7 94mm dia connector Fig
70. cause Correction A report occurs during A C operation when the low pressure sensor installed at constant low pressure parts detects a pressure of 0 05 MPa or less continuously for 2 minutes or an instantaneous pressure of 0 02 MPa or less These values represent abnormal low pressure which may damage the compressor However the alarm does not actually occur the first 2 times that the above operation takes place At these times the outdoor unit is stopped and the conditions are monitored The alarm occurs when the above operation occurs for the fifth time The first 4 times before the alarm occurs are called pre trip After pre trip occurs if the low pressure sensor detects a pressure of 0 15 MPa or more for 3 minutes of continuous operation the pre trip count is reset to 0 If the low pressure sensor detects a pressure of 0 16 MPa or less continuously for 30 minutes when the compressor is stopped an alarm occurs immediately no pre trip The A C unit low pressure has dropped to a level that does not occur under ordinary conditions 1 The absolute amount of gas in the system is too low as a result of insufficient refrigerant charge or leak 2 The refrigerant has accumulated in the circuit and has not returned to the compressor Refrigerant has accumulated in a location of one way flow and cannot escape High pressure level is low resulting in poor flow of refrigerant in the circuit A lower high pressure level results in a
71. cing check Alarm history a display display E buttons for 4 seconds or Press the onger Filter lifetime button operating mode Press and hold the and Simple settings priority central ES buttons for 4 seconds or When settings are made control address longer from a remote controller and other settings the indoor unit where that System address FEA CAN remote controller is indoor unit address Press and hold the En PES connected stops Detailed settings central control and SET buttons for 4 seconds address and other a settings Automatic address Kii i setting based on Press and hold the and utomatic address command from the timer operation 4 buttons Automatic reset the wired remot e wired remote for 4 seconds or longer controller or longer Entire system stops Press and hold the 4 F and A Press the Address change mit address the timer operation y buttons E for 4 seconds or longer Change of indoor button N 3 WAY SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions Test Run Function Operates the unit with the thermostat forced ON lt Procedure gt Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 3 Start operation zt PROGRAM Press the button to return to normal remote en T controller display
72. ction Of Parts isis sce ewi new Oe eee eee eee eee eee eee eee eee 5 29 TeSt PIN cte cess udt tundic ne heeessasatan te eatin totasetenesc trios cheba 5 30 1 Contents of Remote Controller 3 WAY SYSTEM Switch Alarm Display Trouble Diagnosis ON O Blinking 3 OFF Serial communication errors Mis setting Wired remote control display Possible cause of malfunction Di Remote controller is detecting Error in receiving serial communication signal Signal from error signal from indoor unit main indoor unit in case of group control Outdoor system i i address indoor unit address or indoor unit address lt E01 gt Operating lamp Wireless remote controller receiver display Operation for heating independent main sub unit setting has not been made pias Auto address is not completed xt e e Error in transmitting serial communication signal Indoor unit is detecting error signal from remote controller and system controller Indoor unit is detecting error e Error in receiving serial communication signal signal from outdoor unit e When turning on the power supply the number of connected indoor units does not correspond to the number set Except R C address is 0 E04 Heating ready lamp E06 e Group wiring failure of indoor units in the refrigerant system blinking occurring when remote controller is operated immediately e e SE after automatic address setting Outdoor unit is detecting error e Error in r
73. d fan mode is required for all year cooling or other reasons install a snowfall protection hood and set this setting to ON 2 Control operation 1 Outdoor units where sensor input present is set send the snowfall sensor input information every 10 minutes to all linked systems if the system wiring is linked 2 At systems where control is performed is set the above information is used to control operation of the outdoor fan 3 At systems where control is not performed is set the snowfall sensor input and above information ignored and the outdoor fan does not operate 4 In the case of a 3 WAY SYSTEM control can be performed when snowfall sensor input is connected to any outdoor unit lt Caution gt Snowfall sensor input information is detected once every 10 minutes Therefore the outdoor fan may continue operating for up to 10 minutes even when there is no snowfall sensor input In addition the outdoor fan may remain stopped for up to 10 minutes when snowfall sensor input is present 19 2 Function for Automatic Judgment of Insufficient Refrigerant Gas and Overcharge This system includes a simple function for judging the level of refrigerant However be aware that false judgments may occur if the control elements of the outdoor unit or indoor unit fail 1 Starting refrigerant level judgment mode Short circuit the CHECK pin on the No 1 outdoor for 4 seconds or longer to engage this mode The LED on
74. de Changes flap operation to draft reduction mode ME DC flap swing mode Selects the swing operation mode for the flap Sets the DC fan tap according to the purpose of use MON DC fan tap setting Change the settings data at the same time NN Sets the humidifier output ON time for when the humidifier is operating Humidifier ON time ON OFF control is performed during humidifier operation This setting therefore sets the ON time per 60 second interval This setting enables a function that stops operation when the amount of time set for the OFF timer has passed after remote controller operation was started Stop at time set for OFF timer after operation starts This function prohibits changes from being made to the remote Timer function change prohibit controller time setting Smudging control Smudging control is disabled when 0000 is set A 3 WAY SYSTEM 3 Remote Controller Servicing Functions Remote Controller Functions The remote controller includes a number of servicing functions Use these as needed for test runs and inspections List of Servicing Functions Functions Description Button operation Reset operation Unitstatus Operation with a Test run forced thermostat Press and hold the button ON for 4 seconds or longer Sensor Temperature Press and hold the and temperature display from each buttons for 4 seconds or Current operation is display sensor Dada maintained Press and hold the and Servi
75. djust the amount of refrigerant in the system y 3 WAY SYSTEM 4 Backup Operation Outdoor Unit Repair Procedures e After adjusting the amount of refrigerant turn OFF the power at the failed outdoor unit release the short circuit at the vacuum application pin and close the liquid tube valve at the failed outdoor unit Refrigerant recovery is not affected by the power status of the failed outdoor unit However collecting refrigerant in the failed outdoor unit is affected by whether the power at that outdoor unit can be turned ON If the power cannot be turned ON use a refrigerant recovery device and recover the refrigerant into a recovery cylinder in order to adjust the amount of refrigerant in the system 4 2 2 Backup operation by setting the failed compressor not to operate Backup operation settings for each compressor INV compressor AC1 compressor AC2 compressor Setting for backup operation OK OK Failed DIP switch S010 Turn BACK UP and AC2 ON OK Failed OK DIP switch S010 Turn BACK UP and AC1 ON OK Failed Failed DIP switch S010 Turn BACK UP AC1 and AC2 ON Failed OK OK DIP switch S010 Turn BACK UP and INV ON Failed OK Failed DIP switch S010 Turn BACK UP INV and AC2 ON Failed Failed OK DIP switch S010 Turn BACK UP INV and AC1 ON E 3 WAY SYSTEM 5 Recovering Refrigerant Outdoor Unit Repair Procedures The following equipment and tools are required Jumper wire with clips adjustable wrench set o
76. door unit Connect the lower valve to the low pressure sensor outlet with Schrader type push to release valve in the outdoor unit to be oil charged and then connect the high pressure sensor outlet with push to release valve to the upper valve via the manifold gauge valves at Hi pressure gauge side In addition connect the suction line service port with push to release valve to the DPR Discharge Pressure Regulator Carry out the connection work quickly to avoid letting air enter The hoses may be subject to internal pressure from the refrigerant inside the A outdoor unit A Schrader type push to release valve is provided at each connection port e Since the DPR valve opens at pressures of 2 5 MPa and above be sure to connect the DPR to the suction line service port low pressure side High pressure outlet port For 7 94mm dia connector Low pressure outlet port For 7 94mm dia connector Manifold gauge Lo Hi Lower valve Suction tube service port For 7 94mm dia connector E y 3 WAY SYSTEM 8 Charging Compressor Oil Outdoor Unit Repair Procedures Next follow the instructions in 5 2 1 Cooling operation for all units at the outdoor unit where oil will be charged and start cooling operation at all units When the operating conditions have stabilized perform steps 1 2 and 3 in sequence and open the valves When this is done the refrigerant pressure from opera
77. door unit sensor temperatures lt Operating procedure gt Press and hold the CHECK button and buttons simultaneously for 4 seconds or longer to switch to temperature monitor mode During temperature monitoring is lit The display and operations are the same as when monitor mode is started from the unit remote controller Press the UNIT button and select the indoor unit to monitor Use the temperature setting Ta and y buttons to select the item code of the temperature to monitor The selected indoor unit No and the temperature data are displayed To end monitoring press the CHECK button The display returns to the normal display No 1889 The display does not blink 3 WAY SYSTEM Outdoor Unit Maintenance Remote Controller O INEROFF 4 Monitoring Operations E Display of unit No 1 main unit Intake temp 1 we 03 es nl L m rm E ws Li EE Discharge temp Li Discharge temp setting 3 WAY SYSTEM Outdoor Unit Maintenance Remote Controller Po Remarks sis ge er 3X Discharge temp 1 Discharge temp 2 s FS High pressure sensor temp Heat exchanger gas 1 Heat exchanger liquid 1 En Heat exchanger liquid 2 Inverter primary current et 17 Sn Heat exchanger gas 3 T e pl Heat exchanger gas 2 C D es ee A Outdoor unit A
78. e Press the timer time A 5 buttons to select the desired setting data For item codes and setting data refer to the following page Press the button The display stops blinking and remains lit and setting is completed 7D Press the button to return to normal remote controller display 3 WAY SYSTEM Remote Controller Functions Remote Controller Functions Section Ow CZ RTC2 Fig 1 4 A a 3 WAY SYSTEM 1 Simple Settings Function Remote Controller Functions List of Simple Setting Items No Description Not displayed 150 hours Filter sign ON time 0002 2 500 hours fitlter life time 0003 5 000 hours 10 000 hours 0005 Use the filter clogging sensor 0000 Standard setting at time of shipping Degree of filter fouling 0001 Highly fouled Filter CEDE En ON time is reduced to one half the set time 0001 Central control address 1 A control address 1 0002 Central control address 2 0003 Central control address 3 Central control address l 0064 Central control address 64 0099 No central control address set setting at time of shipping Operating mode 0000 Normal setting at time of shipping priority change CompressoroN____ Compressor OFF Fan speed when heating thermostat is OFF dca Heating inake Ai 0006 als intake temperature 6 C Jowi Electric heater ECN No he
79. e are high The compressor capacity and the circulation flow of refrigerant are decreased in order to raise the evaporation temperature Te and lower the condensation temperature Tc Under conditions other than those listed above the capacity of the outdoor unit heat exchanger is adjusted In some cases the heat exchanger capacity may also be adjusted at the same time when the compressor capacity is varied 3 WAY SYSTEM 3 Compressor Control Control Functions Compressor Control Table Low lt Evaporation Temp Te gt High Evaporation temperature Te and condensation temperature Tc areas A B C and D are the same as for evaporation temperature control and condensation temperature control 2 Increasing decreasing the heat exchanger capacity when the outdoor unit heat exchanger is functioning as a condenser Primarily when both the evaporation temperature Te and condensation temperature Tc are high This occurs when the cooling capacity heat intake is low and the heating capacity heat discharge is high The outdoor heat exchanger capacity is increased increasing the system condensation capacity and lowering the condensation temperature Tc The amount of heat discharge at the outdoor unit heat exchanger increases increasing the heat intake at the Cooling mode indoor units and lowering the evaporation temperature Te Primarily when both the evaporation temperature Te and condensation temperature Tc
80. e are 3 outdoor units First operation Second operation e Defrost flow E Evaporator operation C Condenser operation S Shut off E C Switching from evaporator operation to condenser operation C E Switching from condenser operation to evaporator operation Defrost Defrost in Defrost in preparation progress Switch progress 1st outdoor unit 2nd outdoor unit Defrost in progress Defrost in progress Outdoor unit s where defrost occurs first E C C E Outdoor unit s where defrost occurs secondly E E C Compressor Operating Operating Operating Remote Controller Stop Defrost end Mode un gt 73 1 Cooling 2 Heating Defrost end judgment Defrost end judgment 1 Cooling 2 Heating Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Time Max 7 min Max 7 min Auto Cooling OGjojo moOjo O mio O N O N N o0jojoj mjoOjo MO OD W O aM wo Auto Heating Ojojo mOjoO O Mi O A N O N WMN Ojojo m OjO O M O A N O N WMN Type E1 performs E C for 3 minutes after defrost ends Therefore the thermostat remains OFF for 3 minutes 1 Function when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the cooling mode within the same solenoid valve kit 2 Func
81. e ei ees a eee dee cee ew a bes 1 11 Other Controls iese ramie A owe te a eh was oe BO eee Se E id 1 16 Operation of Solenoid Valves 0 cece eee 1 17 Outdoor Unit Electronic Control Valves MOV1 MOV2 MOV3 MOV4 1 19 Outdoor Fan Control 5650006 see Rees Pee eae ia AA AA 1 21 Demand Control ects ta a ie west Nc at edad aad alle DR a 1 22 Indoor Unit Control of the Electronic Control Valve o o eee eens 1 23 Solenoid Valve Kit Control 2 2 0 0 cece eee eee 1 25 Indoor Special Control sis il wee ee et A es 1 26 Discharge Temperature 0 0 cee ei ee ee eee ee ee ee ee 1 27 Current Protection sic hake ketwen dit A eet a 1 28 LOW Ol Alarm foxx w cena ee a a wiles awe Pee AA a iste 1 29 Pressure Sensor Failure 000 c cece eee eee eee 1 30 Backup Operation is corcicia cede ek ce eke wee a ee dew ewe ee ewe oe 1 31 Service Maintenance Functions 00 cece eee eee eee 1 33 Other FUNCONS 3 05424 bees Gee di ewe wanted a task d Owed ee kas 1 36 B 3 WAY SYSTEM 1 Introduction Control Functions The 3 WAY System is a system that allows multiple outdoor units to be connected The outdoor units all contain inverter compressors and the system does not utilize the sub units that were used in earlier systems The outdoor unit where the unit No is set to 1 includes the CCU command controller unit functions that are used to control the entire system As a result the system will
82. e refrigerant recovery unit to the Lo gauge side shut down all indoor and outdoor units and then recover the remaining refrigerant in the oil charging tank manifold gauge valves and connecting hoses Perform these procedures quickly and securely so that no air can enter After charge the necessary amount of new refrigerant by referring to the Installation Instructions that came with the outdoor unit To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit 8 2 If Outdoor Unit Has Not Been Charged with Refrigerant When a compressor has been replaced or in any other case where the outdoor unit has not been charged with refrigerant first charge with refrigerant then follow the instructions in 8 1 If Refrigerant Has Already Been Charged to Outdoor Unit and charge with oil Or alternatively follow the procedure below 1 Connect a tube to the oil outlet port on the outdoor unit to be charged with oil Insert the other end of the tube into the oil container 2 Follow the instructions in 7 Evacuating System and apply vacuum to the outdoor unit to be charged with oil When this is done oil is charged into the outdoor unit through the oil outlet port 3 When the unit has been charged with the designated amount of oil stop the vacuum pump Ara Because oil absorbs moisture readily this work must be completed quickly E 3 WAY SYSTEM 8 Charging Com
83. eceiving serial communication signal signal from indoor unit e There is an indoor unit which does not send signals when the power is ON improper setting e Duplicated remote controller main setting A A A z HTA Operating lamp Improper setting Automatic address setting start is prohibited blinking AP pin was short circuited at time when automatic address E12 setting was started Xt O 0 Error of main indoor unit in receiving serial communication error of group control wiring signal from sub indoor units During auto address setting number of connected units does not correspond to number No indoor unit is connected during auto address setting E20 Heating ready lamp aes pinning o oi signal from main outdoor unit Improper setting 3 Operating and heating ea o Incorrect wiring of remote group control wiring in case of xt shared solenoid valve kit Mismatch of outdoor unit type Duplication of outdoor R C address setting Operating and heating L04 ready lamps blinking simultaneously Capacity code of outdoor unit is not set i i Indoor unit Indoor coil temp sensor E1 Operating and Indoor coil temp sensor E3 la blinking Indoor suction air room temp sensor xX xX Indoor discharge air temp sensor Continued 1 Contents of Remote Controller 3 WAY SYSTEM Switch Alarm Display Trouble Diagnosis ON O Blinking OFF Wired 7 Wireless remote remote controller control A A A rec
84. eiver display display Possible cause of malfunction Standby for heating Operation Thermistor fault Outdoor unit Compressor 1 INV discharge temp sensor F04 Compressor 2 constant speed discharge temp sensor F05 Compressor 3 constant speed discharge temp sensor F22 FIG xy iz Low pressure sensor F17 Heat exchanger 2 liquid temp sensor F24 Heat exchanger 2 gas temp sensor F23 Heat exchanger 3 liquid temp sensor F26 F25 Ceiling panel connection failure lt lt P09 gt gt Timer and ioe Protective Indoor unit Thermal protector in indoor unit fan motor is activated lt lt P01 gt gt ready lamp blinking device loat switch is activated lt lt P10 gt gt altemately Fan inverter protection function activated lt lt P12 gt gt xt xt Oxygen O gas sensor activated P14 Outdoor unit Compressor 1 INV discharge temp trouble P03 High pressure switch 04 Reverse phase missing phase detected 05 i i DCCT ACCT overcurrent compressor less than 80 Hz P16 Operating and heat a ready lamp blinking Compressor 2 constant speed discharge temp trouble P17 altemately Compressor 3 constant speed discharge temp trouble P18 i i Outdoor unit fan trouble P22 xt O xt DCCT ACCT overcurrent 80 Hz or more P26 Start failure caused by compressor wire missing phase DCCT ne P29 failure or similar problem INV compressor start failure Failure of nonvolatile memory IC EEPROM on indoor unit control PCB Opera
85. el Baber GMOS NE A 3 2 2 FUNCIONS a Bland Gee a thee hb Tate aca od aba Pee ke At 3 3 3 Ordinary Display Controls and Functions 00 00 e eee eee 3 4 4 Monitoring Operations 0 000 cc tte eee 3 9 5 Outdoor Unit Alarm History Monitor 000 cece 3 11 6 Mode Settings 0 00 3 12 REMOTE CONTROLLER FUNCTIONS 0000 e eee eee eee eee 4 1 1 Simple Settings Function 0 0 00 ccc ee 4 2 2 Detailed Settings FUNCtION o ooocooocccnccn 4 4 3 Remote Controller Servicing Functions 00 0c cece eee ee 4 15 Section 5 TROUBLE DIAGNOSIS sc 00200 0 A A eee id A 5 1 1 Contents of Remote Controller Switch Alarm Display o ooocoocorocnooo 5 2 2 Outdoor Unit Control Panel LED Display oooooccocccnccccocn eee 5 4 3 Remote Controller Servicing Functions 0 0 00 cee tees 5 5 4 3 WAY Alarm Codes 000 tenet eee 5 7 5 Blinking Inspection Display 0 cee eee 5 27 6 INSpection GEPAS ima he Ai ee sain Be ee Mien eke el dee ge a eee eared 5 29 Le TOStPIM sci oa hee lata A oe ain Sd ok a eagle Rede Gas 5 30 o Se ee ee ee ee ee Ce Ce dd dd Y O AN OO FF OQ N Os 3 WAY SYSTEM Control Functions 1 CONTROL FUNCTIONS Introduction 2c sas aucicttews ai stare be 1 2 Selecting Outdoor Unit for Operation 00 cece eee 1 3 Compressor Control i460 0 a ee bere eee ek eee week 1 4 Special Controls csocsi cider decid
86. er sign ON time to 1 2 of the standard time setting at the time of 9 g shipping for cases when filter fouling is more severe than normal Filter sign ON times for each model Filter sign ON time E A S per High High sta Long life pe performance performance Model long life Pressure data y differential y o y y PES d x x a S DS f i TO S 001 a Away casseto U1 Y1 cassette Away casseto U1 Y1 Y1 Low Silhouette Ducted eH 0006 High Static Pressure Ducted E1 TOCADA 2500 1250 5000 2o 0007 Ceiling T T1 x EY 1250 2500 1250 E E Pero frerao en ME e ee De Ds Unit hour e X indicates that there is no corresponding filter indicates the filter sign ON time that is set at shipment e High fouling Set when HG is selected for the degree of filter fouling item code H i i l 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions C temcods nm A O Set when using a central control device Central control address Used when setting the central control address manually from the remote controller o a O Operating mode priority change Note 1 1 Explanation of operation mode priority change Enabled only in 2WAY System heat pump models lt Function gt With indoor units that are installed in combination with an outdoor unit model where either heating or cooling operation can be selected the operating mode of the indoor unit that starts first ta
87. erant returns gt lt to the accumulator Sa Does not fully evaporate i resulting in liquid back up Liquid refrigerant gt Electronic control valve 4 opens to 480 pulses 3 WAY SYSTEM 8 Outdoor Fan Control Control Functions 8 1 Fan mode These outdoor units utilize a DC fan motor that can be controlled in a maximum of 16 steps 16 modes However fan modes 15 and 16 can only be used if high static pressure mode has been set For information concerning EEPROM settings refer to the field application functions preteen Outdoor Fan Min Fan Mode and Max Fan Mode Coolnaoperati n Outdoor air temp gt 15 C 1 14 g oP Outdoor air temp lt 15 C 0 Heatingoperation 1 4 Heating operation 1 Even if the fan mode is 0 during cooling operation the fan mode may change to 1 at regular intervals for temperature protection of the inverter hybrid IC 8 3 Fixed Initial Fan Mode For the first 30 seconds after operation starts the mode is fixed at the initial mode which was calculated from the relationship between the outdoor air temperature and the outdoor unit horsepower If the outdoor unit horsepower changes dramatically the initial mode may be recalculated and may be again fixed for 30 seconds 8 4 Operation after Fixed Initial Fan Mode After the fixed initial fan mode the fan mode is increased or decreased according to the operating conditions 1 Cooling mode at all indoor un
88. eration may be unstable Reconnect the inter unit communications line to the No 1 unit e Settings at other outdoor units No particular changes 2 Adjusting the refrigerant for backup operation During backup operation all of the service valves on the failed unit are closed However if a check of the backup operating conditions shows that the level of gas is low recover the refrigerant from the failed outdoor unit If the level of gas is too high collect refrigerant at the failed outdoor unit Recovering refrigerant With the normal outdoor units operating monitor the operating condition and open close the suction tube service valve on the failed outdoor unit where all the service valves were closed In this way recover refrigerant from the failed outdoor unit in order to adjust the amount of refrigerant in the system After adjusting the amount of refrigerant close the suction tube valve at the failed outdoor unit Collecting refrigerant in the failed outdoor unit e Short circuit the vacuum application pin CN102 on the control PCB of the failed outdoor unit where the service valves are closed then turn the power ON Also disconnect the wiring between the outdoor units e With the normal outdoor units operating monitor the operating condition and open close the liquid tube service valve on the failed outdoor unit where all the service valves were closed In this way collect refrigerant in the failed outdoor unit in order to a
89. et other normal indoor units run excluding indoor unit where refrigerant is recovered 5 2 3 Refrigerant recovery procedures 2 Charge refrigerant in repaired unit Amount of charge should equal that recovered by refrigerant recovery unit Ready for operation Power can independently be turned Modify power to permit turning off off for indoor unit where refrigerant is power to refrigerant recovered recovered indoor units independently Change controllable number of indoor units including changes in group control and integrated control settings Charge refrigerant in repaired unit x Amount of charge should equal that recovered by refrigerant recovery unit Replace or repair faulty unit Check for leakage in repaired unit x Evacuate air in repaired unit x Charge refrigerant in repaired unit x Amount of charge should equal that recovered by refrigerant recovery unit Change controllable number of indoor units including changes in group control and integrated control settings Open ball valve Ready for normal operation Open the ball valve Ready for normal operation Service work performed on indoor units is done simultaneously using the service ports at the liquid narrow tube side and the gas wide tube side ball valves Refer to each section in the Installation Instructions on refrigerant charging leak checking and evacuation procedures 5 2 1 Cooling
90. f a failure caused by a loose or displaced connector is based on the relationship between the pres sure detected by the high pressure sensor and the operation of the high pressure switch and on the relationship between the temperature detected by the high pressure sensor and the various temperature thermistors However when the pressure increases suddenly the judgment for the high pressure sensor failure alarm may occur before operation of the high pressure switch Therefore before concluding that there is a failure in the pressure sensor first verify that the service valve was not accidentally left closed that there are no blocked cir cuits and that there is no leakage of refrigerant into stopped outdoor units Also check for a difference between the high pressure measured by the manifold gauge and the pressure detected by the pressure sensor 2 Low pressure sensor failure Identification of a failure caused by a loose or displaced connector is based on the relationship between the temperature detected by the low pressure sensor and the various temperature thermistors Before concluding that a failure has occurred check for a difference between the low pressure measured by the manifold gauge and the pressure detected by the low pressure sensor High pressure sensor failure Low pressure sensor failure Alarm display F16 F17 A 3 WAY SYSTEM 17 Backup Operation Control Functions lt Field Application Functions gt 17 1 Automa
91. f manifold gauge valves specially designed for refrigerant R410A only vacuum pump refrigerant recovery unit pre purged refrigerant cylinder for recovery flathead screwdriver and outdoor unit maintenance remote controller 5 1 Refrigerant Recovery Procedures from outdoor unit 1 Turn off the power of the outdoor unit beforehand at power mains 2 Fully close each service valve on the suction tube discharge tube liquid tube and the balance tube of the outdoor unit 3 Connect the outdoor unit s high pressure and low pressure outlet ports with the Hi and Lo sides of the manifold gauge valves using hoses Fig 7 The remaining refrigerant in the faulty outdoor unit may create internal pressure CAUTION Before connecting hoses be sure to confirm that each of the manifold gauge valves is tightly closed Note that the connection ports employ Schrader type push to release valves 4 Connect the manifold gauge valves refrigerant recovery unit and recovery cylinder using hoses To avoid the entry of air into the refrigerant tubing carry out this connection work carefully Fig 7 For detailed procedures such as connecting the refrigerant recovery unit with the CAUTION recovery cylinder and methods used for recovery follow the specific instructions that came with the refrigerant recovery unit 5 Locate the AP Air Purge pins on the control PCB in the faulty outdoor unit and short them using the clips of the jumper wire T
92. ffective 1 If there is a fan HIC failure or circuit failure replace the PCB 2 If the fan motor is locked replace the fan motor Turn OFF the power and check the continuity of and on the fan circuit PCB P26 Alarm Airmen Pe O OOOO Alarm meaning Inverter compressor high frequency overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of 80 Hz or higher after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause The detection methods are the same as for P16 However the fact that operation up to high frequencies is possible does not necessarily mean that a compressor failure is the cause of the trouble Start the compressor several times If alarm P26 occurs every time and alarm P16 does not occur at all then the possibility of a compressor failure is low Check the power wiring and connector wiring Correction It is possible to resolve this trouble by limiting the maximum frequency Example NN TEA o O 4 3 WAY ECO i Alarm Codes 3 WAY SYSTEM 5 Blinking Inspection Display Trouble Diagnosis P29 Alarm Bay tee ee Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start and occurs when missing phase or lock is detected and when a DCCT failure
93. frigerant AN When charging with liquid refrigerant add refrigerant a little at a time in order to prevent liquid back flow Fully close the low pressure gauge valves on the manifold gauge follow the instructions in 8 Charging Compressor Oil and charge with oil if necessary 10 Remove the manifold gauge The connecting port employs a Schrader type push to release valve When disconnecting the hose pressure will be applied from the refrigerant in the outdoor unit 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 10 2 2 Replacing all compressors in a failed unit 1 as 9 Follow the instructions in 3 Discharging Compressor Oil and drain the oil from the oil separator in the failed unit Measure the amount of drained oil If backup operation is required follow the instructions in 4 Backup Operation and engage backup operation Follow the instructions in 10 3 Removing and Installing Compressors and replace all compressors in the failed unit Fully close the high and low pressure gauge valves on the manifold gauge then stop the vacuum pump Disconnect the manifold gauge from the vacuum pump Connect the manifold gauge to the refrigerant cylinder At this time be careful that air does not enter the tubing AN Do not reuse the recovered refrigerant Use a refrigerant cylinder that contains new refrigerant Open the valve on the refrigerant cylinder and open the
94. ful that air does not enter the tubing Open the valve on the refrigerant recovery cylinder and the high pressure gauge valve on the manifold gauge to charge with refrigerant At this time the low pressure gauge valve on the manifold gauge remains fully closed If the recovered refrigerant becomes mixed with another refrigerant or another gas JN such as nitrogen or air do not use the recovered refrigerant for charging Charge with the designated amount of new refrigerant When charging has been completed with an amount of new refrigerant equal to the amount of recovered refrigerant or when charging with the same amount of new refrigerant has not been completed but no more refrigerant will enter the unit fully close the high pressure gauge valve on the manifold gauge Next turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 Finally fully open all valves on the suction tube discharge tube liquid tube and balance tube If backup operation was engaged follow the instructions in 4 Backup Operation and perform backup operation recovery If charging with an amount of new refrigerant equal to the amount of recovered refrigerant was not possible fully close the high pressure gauge valve on the manifold gauge Then while the unit is operating in 5 2 1 Cooling operation for all units open the low pressure gauge valve on the manifold gauge and charge with the designated amount of re
95. g mode 1 and setting mode 2 are used to make the outdoor EEPROM setting 3 WAY SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller E Functions on the ordinary display Connect the special service checker wiring to the outdoor unit PCB The connection is shown in the figure below Outdoor unit PCB RC 3P BLU PCB connector 3P BLU O ES Special service checker wiring Relay connector 2P WHT Remote controller Ass y e f the communications line in the inter unit control wiring is connected it can be left as is O Incase of an independent outdoor unit 1 maintenance remote controller connected to 1 outdoor unit automatic address setting for indoor units not completed both setting mode 1 and setting mode 2 can be used e The overall system status for that refrigerant system is displayed 3 WAY SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller O All units start stop Fig 1 lt Operation gt The ON OFF operation button can be used to start and stop all the indoor units The LED turns ON when 1 or more indoor units is operating e The LED blinks when an alarm has occurred at 1 or more indoor units during operation LED Switching between cooling heating Fig 1 lt Operation gt The cooling modes GE ALL MODE button
96. g on the conditions all inverter compressors may be operating for fine adjustment 3 4 Inverter Compressor Capacity Control 1 The inverter compressor has a center limit value and upper limit value for the operating frequency These limits are set for each outdoor unit capacity 2 The inverter frequency during operation may be lower than the frequency listed above due to overload current protection control In this case the inverter frequency lower limit is 22 Hz If Quiet mode is selected the inverter may stabilize at a frequency lower than those stated above For information about Quiet mode refer to the field application functions 3 5 Forced Compressor Stop After a compressor stops it will not start for a period of 3 minutes 3 minutes forced OFF However this does not apply when the compressor was forced to stop as the result of a control operation during the special controls start control defrost control refrigerant oil recovery control etc which are described later 3 6 Roadmap Control 1 The below controls are performed according to the pressure sensor on the outdoor unit and the 2 temperature sensors attached to the indoor unit heat exchanger With roadmap control the pressure detected by the pressure sensor is converted to saturation temperature A temperature that has been converted to saturation temperature is called the pressure sensor temperature 2 These controls are performed every 30 seconds
97. ge temperature are low and the mechanical valve of that unit is opened to 300 pulses or more and the E1 temperature is close to room temperature However be aware that this kind of data results often when there is a height difference between indoor units Reducing the amount of refrigerant will improve the refrigerant flow however reducing it too much will increase the likelihood of alarms related to low oil level scroll side the low pressure SW and discharge temperature Use caution Example This alarm may result when the service valve is closed or when valve leakage particularly from the mechanical valve occurs F17 Alarm Alarm conditions 1 Sensor short circuit ee 2 Sensor open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote monitor or a PC monitor to check the temperature that is recognized by the microcomputer Correction Example F31 Alarm EAN ra ASS Outdoor unit non volatile memory EEPROM trouble Alarm conditions 1 Non volatile memory is not present when power initialization occurs 2 Read values do not match after writing to non volatile memory is complete Probable cause 1 Memory was not inserted after the PCB was replaced 2 The lifetime of the non volatile memory has been reached 3 Non volatile memory is installed incorrectly wrong direction bent pins e
98. ger 1 A X I Heat exchanger 2 Heat exchanger 2 4 4 U 8MF1E8 10MF1E8 12MF1E8 U 14MF1E8 16MF1E8 Operation of electronic control valves during normal unit operation Heat exchanger MOV1 MOV2 MOV3 Remarks status o E Maximum flow control All indoor units in Cooling mode Stopped o o o Refrigerant shut off eae 45 480 15 480_ 15 480 All indoor units in Heating mode Stopped To o To 7 Refrigerant shut off Mixed Outdoor heat 50 480 50 480 Heat exchanger capacity control heating exchanger condenser Stopped o o 0 Refrigerant shut off cooling Outdoor heat 45 480 15 480_ 15 480 0 0 0 operation exchanger evaporator Stopped Refrigerant shut off O When all indoor units are operating in Cooling mode or Heating mode all outdoor unit heat exchangers are used if even one of the compressors in that outdoor unit is operating e During mixed heating cooling operation the number of heat exchangers used varies according to the conditions of the indoor units However heat exchanger 1 at the outdoor unit which contains the inverter compressor with the lowest amount of operating time is always used e SH control controls the difference between the liquid temperature and gas temperature to 1 5 C e During heating mode SH operation refrigerant may not flow to the heat exchanger 1 19 7 Outdoor Unit Electronic Control Valves 3 WAY SYSTEM MOV1 MOV2 MOV3 MOV4 Control Functions
99. harge temperature level Highest level among the air discharge temperature levels of all compressors Air discharge temp level Discharge temp Horsepower limit oo j smr oono O The values shown in the table above are reduced to the values calculated by roadmap control 3 WAY SYSTEM 3 Compressor Control Control Functions 2 Current protection Inverter compressor current control is composed of primary current control and secondary current control Current protection control for the inverter compressor is performed by self protection in the inverter circuit and does not increase or decrease the compressor capacity o Operation stops instantaneously due 75 or 150 C Thermostat OFF to activation of hybrid IC Thermostat OFF Operation stops for 18 5 or above Thermostat OFF 100 ms for current protection 26 5 14 5 18 5 Horsepower decreased 14 Less than 14 5 Prohibit horsepower increase Less than 14 Permit horsepower increase 3 6 5 Roadmap control after trip When restarting after trip stop occurs the horsepower may increase slowly depending on the trip counter value 1 If Trip counter 1 the horsepower increases at a speed that is 1 2 of ordinary roadmap control 2 If Trip counter 2 the horsepower increases at a speed that is 1 3 of ordinary roadmap control The trip counter is cleared if no trip occurs within 10 minutes after operation starts 1 10 f 3 WAY SYSTEM 4 Special Controls Control Functions In addi
100. heir system addresses For information concerning EEPROM settings refer to the field application functions 2 3 Outdoor Unit Stop Rules 1 Simultaneous stop of multiple outdoor units When all outdoor units or multiple outdoor units must stop the units stop at the same time However depending on the communications timing a difference of approximately 10 seconds may occur 2 Stopping individual outdoor units e The last unit to stop operating is the outdoor unit that contains the inverter compressor with the shortest amount of operating time e f the indoor load decreases and it becomes necessary to reduce the number of operating outdoor units the compressors are stopped individually in sequence When all compressors installed in an outdoor unit have stopped that outdoor unit also stops 3 WAY SYSTEM 3 Compressor Control Control Functions 3 1 Compressors Mounted in the Outdoor Units U 8MF1E8 U 10MF1E8 U 12MF1E8 U 14MF1E8 U 16MF1E8 Capacity 8 hp 10 hp 12 hp 14 hp 16 hp DC Inverter DC Inverter DC Inverter DC Inverter DC Inverter oo r Compressor 2 Soron Shp enp 65hp Shp hp compressor Compressor 2 Scroll 5 hp 6 hp 6 5 hp 5 hp 6 hp Compressors soron 5h 6hp For both 50 Hz and 60 Hz hp horsepower Constant Constant Constant speed INV speed INV speed Compressor 3 Compressor 2 Compressor 1 Compressor 2 Compressor 1 U 8MF1E8 10MF1E8 12MF1E8 U 14
101. hen restore electrical power to the outdoor unit By short circuiting the AP pins each solenoid valve in the outdoor unit is forcibly CAUTION opened as soon as power comes on which releases all remaining refrigerant into the recovery cylinder Since neglecting this procedure may leave some refrigerant in the system it is important that you carry out this step 6 Carry out refrigerant recovery CAUTION To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit Manifold gauge Lo Hi Refrigerant recovery unit High pressure outlet port For 7 94mm dia connector z Refrigerant recovery cylinder s 1g Low pressure outlet port For 7 94mm dia connector O le o e r 3 WAY SYSTEM 5 Recovering Refrigerant Outdoor Unit Repair Procedures 5 2 Refrigerant Recovery Procedures Indoor Unit The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the indoor unit due to trouble in the refrigerant circuit 5 2 1 Cooling operation for all units Ball valve is provided in the indoor unit YES NO 5 2 2 Refrigerant recovery Turn off all equipment in system Replace or repair faulty unit procedures 1 Check for leakage i ired unit Turn off all equipment in system When replacing or repairing a faulty Evacuate air from repaired unit unit l
102. her outdoor unit Check This alarm is not displayed on the remote controller Therefore check the blinking on the outdoor Wait for automatic address setting to be completed at the outdoor unit where it is currently in progress Then start automatic address setting again Alarm conditions The number of indoor units was too few when automatic address setting was performed Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is too many 2 The inter unit control wiring between indoor units has been cut Check 1 Refer to the test run servicing materials and check the indoor unit quantity setting SW S004 S005 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E16 Alarm aiomente fed Automatic address setting alarm too many units Alarm conditions e The number of indoor units was too many when automatic address setting was performed e After initial communications were completed an unrecognized unit was detected Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is less than the number set 2 The inter unit control wiring is wired incorrectly Check 1 Refer t
103. hermostat OFF 100 pulses However position is 20 pulses for type E1 Cooling Heating Thermostat ON Performs SH control in the range of 55 480 pulses 1 Cooling Thermostat OFF 20 pulses Thermostat ON 100 pulses Heating Thermostat OFF 100 pulses However position is 20 pulses for type E1 5 In the case of the common use electronic valve kit and more than one 1 indoor unit in the heating mode within the same electronic valve kit the position becomes 20 pulses i 3 WAY SYSTEM 11 Solenoid Valve Kit Control Control Functions This device connects the solenoid valve kit which is used to switch between indoor unit cooling heating for 3 WAY types 1 Operation of the except type E1 solenoid valve kit Remote Discharge Intake Balance EP valve evaporation Thermostat OFF OFF ON Thermostat ON ON Heating Thermostat OFF ON Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Auto Cooling Auto Heating 1 Cooling 2 Heating Stopped 1 Cooling 2 Heating 1 Function when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the cooling mode within the same solenoid valve kit 2 Function when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the heating mode within the same solenoid valve kit 2 Operation of the type E1 solenoid valve kit Remote Di
104. hermostat ON time Cooling discharge temperature shift 0010 10 C 010 10 C Heating discharge 00 temperature shift 00 8 C o ea Id 00 elellla _ ole LISIS m o o es oj o O OJO 0010 0001 Temperature shift for 0002 cooling heating change in 0003 auto heatcoo mode 0007 0018 18 C Lower limit at shipment 0019 ae am cu 0029 Lower limit 0030 30 C Upper limit at shipment 7 g 0016 16 C Lower limit at shipment cl 0017 oe 0029 es to les 0030 30 C Upper limit at shipment rs setting range saa ae Lower limit at shipment Upper limit Drying c 4 0029 Lower limit 0030 30 C Upper limit at shipment 0017 17 C Lower limit at shipment 0018 Filter CN70 input switching 0002 Humidifier input Operates linked with drain pump when humidifier is ON Indoor unit electronic 0000 _ Present Setting at shipment control valve 0002 None 0000 Normal Used as optional relay PCB or JEMA standard HA terminal T10 terminal switching 0001 Used for OFF reminder 0002 Jf Lo Upper limit af ga Lower limit Auto heat cool A 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions Item code Setting data ee Description 0000 No forced operation Automatic drain pump 0001 Forced operation for 1 minute operation 0060 Continuous operation 0000 None Ventilation f ti ETE A A T9001 0
105. hich ignores exchanger temperature is suitable for humidifying This setting is the heat exchanger temperature used to ignore this condition for humidifier operation and operate the humidifier more NES Filter input switching This setting switches the filter input according to the purpose of use This setting indicates whether or not an indoor unit electronic control valve is present At the time of shipping this setting is set according to the conditions of the indoor unit Indoor unit electronic control valve Ordinarily the T10 terminal is used as the HA terminal at the time of T10 terminal input switching shipping However this setting is used when the T10 terminal is used for OFF reminder or for fire prevention input It is possible to install a total heat exchanger and ventilation fan in the system which can be started and stopped by the wired remote controller The ventilation fan can operate linked with the start and stop of the indoor unit or can be operated even when the indoor unit is stopped Use a ventilation fan that can accept the no voltage A contact as the external input signal In the case of group control the fans are operated together They cannot be operated individually Ventilation fan operation from remote controller This setting is used to switch from the body sensor to the remote controller sensor Check that remote controller sensor is displayed Do not use this setting with models that do not
106. high pressure gauge valve on the manifold gauge with the low pressure gauge valve closed When charging has been completed with an amount of new refrigerant equal to the amount of recovered refrigerant or when charging with the same amount of new refrigerant has not been completed but no more refrigerant will enter the unit fully close the high pressure gauge valve on the manifold gauge Next turn the power OFF at the repaired outdoor unit then remove the short circuit at the AP pin CN102 Finally fully open all valves on the suction tube discharge tube liquid tube and balance tube However leave the balance tube fully closed if only a single outdoor unit is installed If backup operation was engaged follow the instructions in 4 Backup Operation and perform backup operation recovery If charging with an amount of new refrigerant equal to the amount of recovered refrigerant was not possible fully close the high pressure gauge valve on the manifold gauge Then while the unit is operating according to 5 2 1 Cooling operation for all units open the low pressure gauge valve on the manifold gauge and charge with the designated amount of refrigerant AN When charging with liquid refrigerant add refrigerant a little at a time in order to prevent liquid back flow Fully close the low pressure gauge valves on the manifold gauge follow the instructions in 8 Charging Compressor Oil and charge with the necessary amou
107. his valve is always OFF 2 When unit is operating This valve is ON at the oil supply outdoor unit when unit refrigerant oil recovery control is in progress This valve repeatedly turns ON OFF at regular intervals during unit refrigerant oil recovery control It is not constantly ON 1 18 7 Outdoor Unit Electronic Control Valves 3 WAY SYSTEM MOV1 MOV2 MOV3 MOV4 Control Functions 7 1 Types of Electronic Control Valves U 8MF1E8 U 10MF1E8 U 12MF1E8 U 14MF1E8 U 16MF1E8 Electronic Heat exchanger Heat exchanger Heat exchanger Heat exchanger Heat exchanger control valve 1 1 valve 1 valve 1 valve 1 valve 1 valve Electronic Heat exchanger Heat exchanger Heat exchanger Heat exchanger Heat exchanger Electronic control valve 2 2 valve 2 valve 2 valve 2 valve 2 valve control valve Electronic Nove Nene None Heat exchanger Heat exchanger control valve 3 3 valve 3 valve Eon For SC circuit For SC circuit For SC circuit For SC circuit For SC circuit control valve 4 7 2 Power Initialization If no indoor units have started even once after the power was turned ON the outdoor unit electronic control valve operates at 480 pulses 7 3 Heat Exchanger Controlled by Each Electronic Control Valve The configuration of the heat exchangers is different depending on the capacity of the outdoor unit MOV3 is not present in U 12MF1E8 and below Heat exchanger 3 Heat exchanger 1 Heat exchan
108. hp 280 10hp 355 12hp 400 14hp 3 WAY SYSTEM Remote Controller Functions 4 REMOTE CONTROLLER FUNCTIONS 1 Simple Settings Funci n oouxcoocrcrssicirrrd ca ee 4 2 2 Detailed Settings FUNCION Cee eee ee we ees 4 4 3 Remote Controller Servicing Functions 200 cee eee eee 4 15 1 Simple Settings Function This allows the filter lifetime operating mode priority change central control address and other settings to be made for an individual or group control indoor unit to which the remote controller used for simple settings is connected When simple settings mode is engaged operation stops at the individual or group control indoor unit to which the remote controller for simple settings is connected lt Procedure gt Press and hold the and Ed buttons simultaneously for 4 seconds or longer Gan unit No i or ALL in the case of group control item code 7 and settings data if XX are displayed blinking on the remote controller LCD display Fig 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating If unit No AL is displayed the same setting will be made for all indoor units buttons to select the item code to chang
109. ible fire hazard e Provide a power outlet to be used exclusively for each unit and a power supply disconnect circuit breaker and earth leakage breaker for overcurrent protection should be provided in the exclusive line e Provide a power outlet exclusively for each unit and full disconnection means having a contact separation in all poles must be incorporated in the fixed wiring in accordance with the wiring rules e To prevent possible hazards from insulation failure the unit must be grounded When Transporting outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditioner can cut your fingers When Installing Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors NUI In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents Keep the fire alarm and the air outlet at least 1 5 m away from the unit When Connecting Refrigerant Tub
110. ical valve failure Check whether the mechanical valves make a clattering sound when the power is reset Since the mechanical valve in the indoor unit is in a location that makes aural inspection difficult use an electric means to check Check that the connector pin of the mechanical valve on the PCB outputs 4 V In addition check that the coil resistance of the mechanical valve is several tens of Ohm Q 11 Check for solenoid valve kit failure Removing a coil that is on will result in a clicking sound Also removing a coil that is off will not produce such a sound 12 Check whether too much refrigerant has been charged Too much refrigerant has been charged if the sub cool temperature of the condenser is 15 C or more 13 Check whether the wiring from the solenoid valve kit is actually connected to the different indoor unit or not 14 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Check whether installation of the common use solenoid valve kit from a PC has been made or not Confirmation from the address setting software of a PC Probable cause Reverse phase or missing phase in the R S T phases Check Check the wiring at the power terminal plate Correction Switch the phases and reinsert Check if the result is OK 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P16 Alarm Alarm code P16 S O Compressor 1
111. id Valves Control Functions 6 3 Balance Valve BALV This valve moves some of the oil from the oil separator to the balance tube 1 When unit is stopped This valve is always OFF 2 When unit is operating A This valve is ON when separator oil self recovery control is in progress B This valve is ON when unit refrigerant oil recovery control is in progress oil supply unit C This valve turns ON for 30 seconds each time a constant speed compressor starts D This valve turns ON for 60 seconds after defrost control ends 6 4 Recovery Valve ORVR This valve recovers refrigerant oil from the balance tube to the compressor 1 When unit is stopped This valve is always OFF 2 When unit is operating A This valve is ON when separator oil self recovery control is in progress B This valve is ON when unit refrigerant oil recovery control is in progress oil receiving unit C This valve is ON when control for insufficient gas is in progress D This valve turns ON for 60 seconds after a constant speed compressor starts E This valve turns ON for 120 seconds after defrost control ends F This valve turns ON for 10 seconds after the outdoor unit stops G This valve remains OFF at all times other than A F above 6 5 Bypass Valve BPV This valve flushes the oil from the balance tubes In addition it is used for recovering refrigerant from stopped outdoor units during cooling operation 1 When unit is stopped T
112. id valve kit from a PC has not been made Make sure that the high pressure switch connector has been properly connected If the high pressure switch is properly connected connect a high pressure gauge to the high pressure outlet port and monitor the pressure during operation to check the pressure when the high pressure switch is activated Check valve failure is likely if the pressure is less than 3 3 MPa The following describes checks to be made when the pressure is high During cooling check whether the outdoor unit heat exchanger is clogged Remove any foreign material that prevents ventilation During cooling check whether an air short blockage has occurred in the outdoor unit The system is operating normally unless the temperature around the outdoor unit is excessively high During cooling check for outdoor fan failure Check whether the screws securing the fan are loose and whether the fan connector in the outdoor unit PCB is properly connected During heating check whether the air filters in the indoor unit are clogged If clogged clean the filters During heating check whether an air short blockage has occurred in the indoor unit The system operates normally unless the temperature around the indoor unit is excessively high During heating check for indoor fan failure Check whether the refrigerant circuit is clogged Check that all service valves are closed Check whether welded locations are clogged 10 Check for mechan
113. ime the compressor starts it may restart from a lower capacity 5 When the area changes to area C area C is considered to be area B for control purposes for the first 6 minutes even if the horsepower is the minimum value within the range where capacity control is possible operation with inverter frequency of 25 Hz only Subsequently if C area continues the thermostat turns OFF 3 6 3 Control of condensation temperature and evaporation temperature during mixed cooling heating operation During mixed cooling heating operation the control maintains a heat balance with a target evaporation temperature Te for the Cooling mode indoor units of 2 6 C and a target condensation temperature Tc for the Heating mode indoor units of 48 51 C Heat balance control is performed by varying the compressor capacity and heat discharge heat intake of the heat exchanger 1 Increasing decreasing the compressor capacity e When evaporation temperature Te is high and condensation temperature Tc is low This occurs when both the cooling capacity heat intake and the heating capacity heat discharge are low The compressor capacity and the circulation flow of refrigerant are increased in order to lower the evaporation temperature Te and raise the condensation temperature Tc e When evaporation temperature Te is low and condensation temperature Tc is high This occurs when both the cooling capacity heat intake and the heating capacity heat discharg
114. in A Replacing the inverter compressor B Replacing constant speed compressor 1 and C Replacing constant speed compressor 2 and remove the compressors There is no predetermined sequence for removal any compressor may be removed first E Installation 1 Follow the instructions in A Replacing the inverter compressor B Replacing constant speed compressor 1 and C Replacing constant speed compressor 2 and install the compressors There is no predetermined sequence for installation any compressor may be installed first F 3 WAY SYSTEM 11 High and Low Pressure Sensors Outdoor Unit Repair Procedures The outdoor unit connection ports for the high and low pressure sensors employ Schrader type push to release valves Therefore it is not necessary to recover refrigerant when removing and installing them 11 1 Removing the High Pressure Sensor 1 Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct and remove the corresponding components from the outdoor unit where the high pressure sensor will be removed 2 Disconnect the high pressure sensor connector 3P BLK from terminal CNOO9 on the outdoor unit control PCB of the outdoor unit where the high pressure sensor will be removed 3 Use 2 adjustable wrenches in combination to remove the high pressure sensor When removing the high pressure sensor internal pressure will be ap
115. in 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or co replace the coil 3 Crank case heater e Connect a clamp meter to 1 of the 2 crank case heater wires and measure the current The current is normal if the result is 0 15 A or higher As a guide the current should be 0 14 A 180 V 0 17 A 220 V 3 WAY SYSTEM 7 Test Pin Trouble Diagnosis When the test pin on the outdoor unit control PCB is short circuited each part can be operated individually e After turning OFF the main unit power short circuit the test pin CNO22 WHT then turn the power back ON Output is performed in the sequence shown in the table below for 0 5 seconds each _ Output Operation Outpt Operation Supercooling valve 2 SCV2 12 Pressure balance valve 2 PBV2 3 Relay RY021 Discharge valve 2 DCV2 13 Relay RY003 Crank case 2 CH2 5 R 7 elay RY007 Recovery valve ORVR Relay RY026 Discharge valve 3 DCV3 5 6 7 Relay RY006 Balance valve BALV 8 Relay RY022 _ Pressure balance valve 1 PBV1 18 Relay RY004 Crank case 3 CH8S 9 RelayRvo17 Refrigerant balance valve RBV 10 Relay RY016 Refrigerant adjustment valve RCV 201103
116. include a remote controller sensor Do not use this setting if both the body sensor and remote sensor are used Switching to remote controller sensor In a MULTI system with multiple remote controllers switching between heating and cooling is restricted and Operation change control in progress is displayed This setting is used to prevent this display from appearing Refer to the item concerned with operating mode priorities ON OFF of Operation change control in progress display This setting switches the operation when the weekly timer is connected to the remote controller This can be used to prevent cases in which the unit is accidentally left ON There is no change when this setting is ON however it is necessary to set the weekly timer ON time OFF reminder function for weekly Continued A a 5 3 WAY ECO i SYSTEM 2 Detailed Settings Function Remote Controller Functions Continued from previous page E E ee Heat exchanger temperature for The heat exchanger temperature control point for prevention of cold air cold air discharge discharge during heating operation can be changed The indoor unit PCB optional output for the fan can be switched Fan output switching according to the purpose of use Ea Drain pump delayed start time ea pump starts after the set time delay after cooling operation MENS Humidifier drain pump setting This specifies the humidifier and drain pump setting MON DC flap operation mo
117. increase in the number of high density buildings however the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners If a single unit of the multi air conditioner system is to be installed in a small room select a suitable model and installation procedure so that if the refrigerant accidentally leaks out its density does not reach the limit and in the event of an emergency measures can be made before injury can occur In a room where the density may exceed the limit create an opening with adjacent rooms or install mechanical ventilation combined with a gas leak detection device The density is as given below Total amount of refrigerant kg Min volume of the indoor unit installed room m lt Density limit kg m The density limit of refrigerant which is used in multi air conditioners is 0 3 kg m ISO 5149 1 If there are 2 or more refrigerating systems in a single refrigerating device the amount of refrigerant should be as charged in each independent device For the amount of charge in this example Outdoor unit e g charged amount 10 kg e g charged amount 15 kg C m C C C Room B
118. increased the outdoor unit ambient temperature reducing the cooling effects after the compressor stops 6 There is a cause that results in P03 P17 or PO2 alarm 7 Electrical noise 1 Sensor malfunction and outdoor unit PCB failure Trouble Constantly indicates a high temperature e When monitoring software or other means are used for monitoring the discharge temperature at times fluctuates suddenly and wildly e In some cases the precise temperature may not be known even when monitoring software is used e Wiggle the sensor and check whether the trouble continues e Check whether the connector is partially disconnected from the PCB yy An F04 alarm will not result if the connector is completely disconnected circuit is open e If the cause is still uncertain check the following to determine whether a sensor or PCB failure has occurred Step 1 Connect the other compressor discharge sensor or a discharge sensor where the F04 alarm has not occurred to the connector for this compressor on the PCB Measure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference gt A PCB or sensor failure is possible No difference gt PCB and sensor are normal If an abnormality was found at Step 1 connect the problem compressor sensor to the other compressor connector on the PCB or to the PCB connector of a device where the F04 alarm has not occurred Mea
119. ing e When performing piping work do not mix air except for specifled refrigerant R410A in refrigeration cycle lt causes capacity down and AMET risk of explosion and injury due to high tension inside the refrigerant cycle e Refrigerant gas leakage may cause fire Ventilate the room well in the event that is refrigerant gas leaks during the installation Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas Keep all tubing runs as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection e Check carefully for leaks before starting the test run Do not leak refrigerant while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refrigerant carefully as it may cause frostbite When Servicing mains before opening the unit to check or repair ES electrical parts and wiring e Keep your fingers and clothing away from any moving parts e Clean up the site after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Do not clean inside the indoor and outdoor units by users Engage authorized dealer or specialist for AMET cleaning In case of
120. ion mode Flap swing lower limit position is upwards 2 Detailed Settings Function 3 WAY SYSTEM Remote Controller Functions Setting data Item code EF temose em e on U U UOO 0000 0001 Fan tap setting Fan tap change in order to prevent drop in air discharge caused by filter installation DC fan tap operating For low Ultra long life filter oil guard panel ammonia deodorizing static pressure filter filter optical regenerative deodorizing filter High ceiling use High ceiling setting 2 with standard panel Antibacterial high performance filter 90 Antibacterial high performance filter 65 Air cleaning unit air cleaning unit optical regenerative deodorizing filter deodorant activated charcoal filter For air blocking For 3 way discharge when discharge duct is connected material For air blocking material For low static pressure filter For 2 way discharge 0000 No humidifier output Humidifier ON time ON time per 60 0058 0059 0000 Repeat timer switchin 0001 seconds Timer function change 0000 prohibit 0001 Smudging control 0000 Setting the Flap Separately Only for 4 way Cassette type Setting the Flap Separately Only for 4 way Cassette type Setting the Flap Separately Only for 4 way Cassette type Setting the Flap Separately Only for 4 way Cassette type 58 sec 59 sec Continuously ON Function disabled Function enabled Function d
121. iority Methods of remotely controlling the operating mode 1 Use the central functions of a central control device 2 Use a remote control relay PCB at the outdoor unit nl P 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions When the operating mode at the priority remote controller is changed the operating modes of other remote controllers change as shown below Mode change at priority remote controller Operating modes at other remote controllers Cooling or dry Heating Fan Fan not changed Heating Cooling Heating Cooling Fan Fan not changed Cooling Cooling not changed Cooling Dry Dry Dry not changed j Heating Cooling Heating Dry Fan Fan not changed Cooling Cooling not changed Cooling or dry Fan Dry Dry not changed Fan Fan not changed Cooling or dry Heating Heating Heating not changed Heating Fan Fan not changed ACT nm J oson O Fan speed setting when os heating thermostat is OFF Changes the fan speed setting when the heating thermostat is OFF Heating intake temperature Shifts the intake temperature during heating i Can be set when the body thermostat is used Set when cost distribution is performed using an AMY central control system 07 Electric heater installation or similar system and when an optional electric heater is installed This is unrelated to control of the electric heater Normally humidifying does not occur when the thermostat is OFF d
122. iquid temperature sensor trouble at outdoor heat exchanger 3 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction J o O Example J gt s O Notes OOO 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F08 Alarm a UA Alarm meaning Outdoor air temperature sensor trouble Alarm conditions 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer F12 Alarm Alarm meaning Compressor intake temperature sensor trouble 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microc
123. isabled Function enabled No smudging control Flap 1 XX 90 Motor No 4 Electrical E gt component box Flap position 2 Motor No 2 adjustment for up down airflow direction UEA Flap 3 XX 92 Motor No 1 When the flap position is set to 4jor 5 cooling or dry mode the flap and the Setting data Flap position during operation and the unit is in the Without separate setting uo E Swing position is moved to 3 E E hn al operation is started The flap swings during the gt Ex EJ Ex al je w al n eS E Move to position 1 and stay lt x Move to position 2 and stay El P e Ex Ex r ES al pun w wr ye Y Ex Ex 12 Ex Move to position 3 and stay operation under Setting the Flap Separately Move to position 4 and stay pu wy E ES ad At this time the unselected flaps Move to position 5 and stay pu E E E De are moved to the position A 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions Simple setting items Filter sign ON time setting Changes the indoor unit filter lifetime when a high performance filter or other filter lifetime optional product is installed Degree of filter foulin Reduces the filt
124. its Operating status of outdoor unit compressor Compressor 1 operating time Compressor 2 operating time Compressor 3 operating time Compressor 1 oil level Compressor 2 oil level Use the temperature setting TA and _ _ buttons to change the item code Remarks Alarm code display Quantity 7 segment display 7 segment display 7 segment display 1 8 7 segment display 7 segment display 0 99999999 hrs 0 99999999 hrs 0 99999999 hrs 0 Empty 1 Insufficient 2 Sufficient O Empty 1 Insufficient 2 Sufficient Compressor 3 oil level Outdoor unit power ON time Compressor 1 operation count Compressor 2 operation count Compressor 3 operation count i Alarm history 1 most recent Alarm history 2 7 Alarm history 3 4 Alarm history 4 Alarm history 5 Alarm history 6 Alarm history 7 Alarm history 8 oldest O Empty 1 Insufficient 2 Sufficient 0 99999999 hrs 0 65535 times 0 65535 times 0 65535 times Display only Alarm code and unit No of unit where alarm occurred are displayed alternately 0 CCU 1 4 Outdoor unit Firmware version m sa m m m a a ls le EE AER A i Sa Za Eu Lx a Cu BO a mr mt re me a hore O og re home oe ee Pg Ex O o IP E E AT a o 1 o Program version Display the version No x 100 Display the version No x 100 3 WAY SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote C
125. its or else mixed heating cooling operation when the outdoor unit is functioning as a condenser A Fan mode is increased when the pressure sensor temperature is high and is decreased when the pressure sensor temperature is low The fan mode is always increased when the pressure sensor temperature is 50 C or higher B The fan mode may be decreased when symptoms of insufficient gas are detected at an indoor unit 2 Heating mode at all indoor units or else mixed heating cooling operation when the outdoor unit is functioning as an evaporator A If the condensation temperature is low the fan mode is increased at regular intervals B If the condensation temperature is high the fan mode is decreased in order to prevent excessive loads C The fan mode may be increased when the outdoor liquid temperature drops to 7 C or below 8 5 Snow Removal Control 1 When the outdoor air temperature is 10 C or below the fan operates for 30 seconds every 2 hours in fan mode 8 even when the outdoor unit is stopped or the heat exchanger is not in use This control is intended to prevent snow from accumulating on stopped fans Because the outdoor air temperature cannot be accurately detected when the unit is stopped a higher outdoor air temperature is used for the control condition in order to ensure correct operation 2 If the fan mode becomes 0 during cooling operation the fan mode is changed to 1 This control is predictive control Use a s
126. kes priority The first indoor unit to operate can select any operating mode When any mode other than fan mode is selected then the operating modes that cannot be selected are not displayed on all remote controllers that are subsequently operated Operation change control in progress is displayed indicating that there are restrictions on the operating modes that can be selected Controlling the operating mode from a specific remote controller When there are multiple remote controllers in the same refrigerant system it is possible to set one remote controller as the priority remote controller the remote controller which is given priority for selecting the operating mode If 2 or more remote controllers are set as priority remote controllers an alarm will occur at the remote controllers and operation will not be possible When the priority remote controller is set to the operating mode for control then all other remote controllers can select only the permitted operating mode regardless of whether the priority remote controller is operating or stopped When a controlled remote controller is operated Operation change control in progress is displayed Set mode at priority remote controller Modes that can be selected at other remote controllers Cooling or dry Cooling dry fan Fan Whichever mode heating cooling is selected first There are other methods to avoid control in which the mode selected first takes pr
127. l is in effect or when snowfall sensor input is present Therefore monitor for approximately 10 minutes if the outdoor unit fans are operating at multiple units Alarm conditions Current is detected in the CT circuit when the compressor is stopped 1 This control is not engaged for the first 30 seconds after the compressor turns ON gt OFF 2 For 1 minute following the first 30 seconds after the compressor turned ON gt OFF the threshold for the detected current is 10 A or more continuing for 2 seconds 3 All times other than the above e If the low pressure SW has not activated the threshold for the detected current is 7A or more continuing for 5 seconds e If the low pressure switch has activated the threshold for the detected current is 7A or more continuing for 2 seconds Probable cause 1 Magnet SW malfunction e The magnet SW has seized and the compressor is continuing to run gt Even when the power is turned OFF the primary side and secondary side contacts remain together e The conditions of magnet SW operation are poor difficult to open gt When a magnet SW is used in a DC circuit it may be difficult for the SW to open at times In an AC circuit the magnet SW should open instantaneously as long as the current is within the allowable range However this kind of trouble can occur if excessive current flows and may prevent the SW from opening 2 CT circuit failure or PCB failure A D failure e CT circuit contact failure g
128. l valve mechanical valve bypass check valve sound of refrigerant flow can be heard and stops when the liquid valve is closed hot gas defrost valve if valve secondary side remains hot even after much time has passed be careful not to mistake transmitted heat for a valve failure e Ice is growing on the lower parts of some outdoor unit heat exchangers but not on others yy Because this trouble may occur even in outdoor units with a high operating rate under conditions of insufficient gas caution is needed 6 Sensor failure Check e This alarm is likely to occur when wiring is partially cut It is difficult to identify even when continuity is checked The detected discharge temperature is high e Although such conditions rarely occur a P02 alarm is likely if the detected discharge temperature is low e Replace the sensor with another discharge sensor and compare the temperature conditions 7 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Correct the problem locations All of the probable causes Notes Operates continuously for a set length of time Indicates 2 5 minutes or longer for an inverter unit and 30 seconds or longer for a constant speed compressor 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P04 Alarm Alarm code Alarm meaning Alarm conditions
129. lease valve Perform the connection work quickly so that no air is allowed to enter Fig 18 Connecting the refrigerant recovery cylinder is done to prevent pressure from rising excessively during backup operation by recovering the refrigerant from the outdoor unit to be repaired Measure the weight of the refrigerant and cylinder itself beforehand and provide sufficient safety measures such as installing a high pressure cutout in the circuit The hoses may be subject to internal pressure from the refrigerant inside the A outdoor unit Check that the manifold gauge valves are fully closed beforehand A Schrader type push to release valve is provided at each connection port 3 Connect the outdoor unit maintenance remote controller to the RC connector CNO06 3P BLU on the outdoor unit control PCB of the outdoor unit to be repaired Then start a test run of all units Press and hold the CHECK button for 4 seconds 4 Press the MODE button and change to heating operation Even if the mode that is originally displayed is Heat be sure to press the MODE button once or more to change to heating operation Pressing the MODE button ensures that heating cooling operation is not mixed and that all units are operating in either Heating or Cooling mode 5 Use the outdoor unit maintenance remote controller to check the operating status of the indoor units Check that all units are operating in Heating mode For details co
130. ll service valves suction tube discharge tube liquid tube balance tube at the failed outdoor unit and disconnect the wiring between the outdoor units 4 Backup Operation 3 WAY SYSTEM Outdoor Unit Repair Procedures lt lf the failed unit is the No 1 outdoor unit main unit gt If the No 1 unit main unit has failed a different outdoor unit must be set as the No 1 unit main unit e Settings at the failed No 1 outdoor unit No particular changes However close all service valves suction tube discharge tube liquid tube balance tube at the failed outdoor unit and disconnect the wiring between the outdoor units main sub unit wiring e Settings at No 1 unit main unit Switch on outdoor unit control PCB System address S003 S002 No of indoor units S005 S004 No of outdoor units S006 Outdoor unit No S007 To this outdoor unit connect the inter unit communication line which was previously connected to the No 1 unit main unit Action Make the same settings as on the failed No 1 unit Make the same settings as on the failed No 1 unit Subtract the number of failed units from the current setting Change to 1 After recovery work is completed return the outdoor unit No setting now 1 to the value it was before the failure and repair If this is not done there will be duplicated outdoor unit No settings In this case an alarm does not occur immediately however op
131. m F12 sensor trouble occurs and all outdoor units stop operating Be sure that you do NOT grasp the lead wire when pulling out the connector Removing any other connector may not cause the units to stop Therefore be sure to pull out the SCT connector only It is not necessary to recover the refrigerant from the balance tube Therefore do not operate the balance tube valve Turn off power to all equipment in the system Then pull out the RC1 connector 4P BLU CN106 on the outdoor control PCB in the outdoor unit for which pump down has been completed By pulling out the RC1 connector communication between the main and the sub outdoor units will be isolated Change the setting of controllable outdoor unit numbers reduce by 1 unit If the setting is incorrect the E30 alarm outdoor unit serial communication signal error occurs and the unit will not operate Turn on power for all equipment in the system and let the remaining outdoor units run in Cooling mode Repeat steps 1 through 7 and complete pump down for all outdoor units Q Using hoses with Schrader type push to release valves connect the manifold gauge valves to the suction line service port the discharge line service port and the liquid line service port in the next outdoor unit to undergo pump down Fig 9 Remaining refrigerant in the system may cause internal pressure Check that each A valve on the manifold gauge is tightly closed A Schrader type
132. m display If a wired remote controller is present the A display blinks during operation 5 Canceling automatic backup operation Repair the outdoor unit where the failure occurred When repairs are completed reset the power on outdoor unit No 1 lt Caution gt After automatic backup mode has been engaged it will not be canceled automatically when the repair of the failed outdoor unit is completed Automatic backup mode will be canceled only when the power on outdoor unit No 1 is reset Therefore after repair work is completed be sure to check whether or not automatic backup mode has been canceled How to check 1 Use test run or other means to verify that all outdoor units operate continuously 2 If a wired remote controller is present check that the A display has disappeared 17 2 Manual Backup If an alarm that does not result in automatic backup occurs frequently possible causes include failure such as refrigerant leakage of a functional part at an outdoor unit other than the unit where the alarm occurs In this case because the outdoor unit service valve must be closed backup operation must be performed manually 1 Backup operation procedure 1 Disconnecting the failed outdoor unit A Reduce the number of outdoor units set at outdoor unit No 1 by the number of failed outdoor units Then turn OFF the power or disconnect the inter unit communications line at the failed outdoor units B Close all service valves at
133. malfunction of this appliance do not repair by yourself Contact the sales dealer or service dealer for repair Do not touch the air inlet or P A CAUTION the sharp aluminum fins of the outdoor unit You may get hurt e Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas e Confirm after installation that no refrigerant gas is leaking If the gas comes in contact with a burning stove gas water heater electric room heater or other heat source it can cause the generation of poisonous gas Do not touch the air inlet or the sharp aluminum fins of the outdoor unit You may hurt Do not sit or step on the unit you may fall down accidentally Do not stick any object into the FAN CASE You may be injured and the A unit may be damaged Check of Density Limit The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out its density will not exceed a set limit The refrigerant R410A which is used in the air conditioner is safe without the toxicity or combustibility of ammonia and is not restricted by laws imposed to protect the ozone layer However since it contains more than air it poses the risk of suffocation if its density should rise excessively Suffocation from leakage of refrigerant is almost non existent With the recent
134. mpressor is not cleared unless the oil level for that compressor reaches 2 or else alarm output occurs 1 11 E 3 WAY SYSTEM 4 Special Controls Control Functions 4 2 3 Flow of system refrigerant oil recovery control 1 Simplified flow of system refrigerant oil recovery control System refrigerant oil recovery control follows this flow Normal operation 3 minute stop May stop for 6 minutes System refrigerant oil recovery control Max 3 minutes 3 minute stop Normal operation 2 Cooling cycle Control time Maximum 3 minutes Stops once before and once after control Outdoor units All outdoor units operate at maximum horsepower Electronic control valve Valves at all indoor units operate at a fixed pulse according to the indoor unit capacity Indoor RAP valve kit Valve kits at all indoor units operate in Cooling mode OFF status units Fan Fan operates at the set fan speed stops or operates at L speed depending on the indoor unit operation mode 3 Heating cycle Control time Maximum 3 minutes Stops once before and once after control Outdoor units All outdoor units operate at maximum horsepower Electronic control valve Valves at all indoor units operate at 480 pulses Indoor RAP valve kit Valve kits at all indoor units operate in Heating mode ON status units Fan Fan operates at the set fan speed stops or operates at L speed depending on the indoor unit operation mode 4 3
135. mpressors in the same system Then inspect Are there 2 or more outdoor units where the compressor oil color phase is 4 0 or higher or where a sharp odor is present NO Go to 10 2 3 Replacing all compressors in a system Go to 10 2 2 Replacing all Go to 10 2 1 Replacing only the compressors in a failed unit failed compressor Follow the instructions in 10 2 4 Dry core cleaning and perform dry core cleaning of the failed outdoor unit Follow the instructions in 10 2 4 Dry core cleaning and perform dry core cleaning of all outdoor units Reference Symptoms of motor burning 1 Ground fault results in breaker operation 2 Short circuit results in different coil resistance at different phases 3 Open circuit 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 10 2 Replacing the Compressor s 10 2 1 Replacing only the failed compressor 1 2 2 3 4 5 9 If backup operation is required follow the instructions in 4 Backup Operation and engage backup operation Follow the instructions in 10 3 Removing and Installing Compressors and replace the failed compressor Fully close the high and low pressure gauge valves on the manifold gauge then stop the vacuum pump Disconnect the manifold gauge from vacuum pump Connect the manifold gauge to the cylinder where the refrigerant was recovered At this time be care
136. munication error not occur in case of only one indoor unit powered off with the remote controller switched on Change the outdoor EEPROM setting item code 23 setting at each outdoor unit into 1 1 Although this setting is made other indoor units will continue operating 2 Although this setting is made the alarm E06 occurs when more than two 2 indoor units are powered off S 3 WAY SYSTEM 19 Other Functions Control Functions 19 1 Snowfall Sensor Functions Outdoor EEPROM 04 A unit identified as having a snowfall sensor attached will periodically send a signal indicating the snowfall sensor input status to all outdoor units in the same system or all wired outdoor units in the case of linked systems It is therefore unnecessary to install and wire multiple snowfall sensors 1 Snowfall sensor settings setings operation OOOO o Sensor input not present Control is performed Setting at time of factory shipment Sensor input present Control is performed Sensor input not present Control is not performed Sensor input present Control is not performed If the snowfall sensor is used then depending on the circumstances it is necessary to make the correct setting at all outdoor units in the system If control is not performed is set control by the above signal is ignored This setting is used in order to conserve energy at outdoor units that include a snowfall protection hood Recommended If a low spee
137. n sub control wiring 2 Check the RC connectors 3 Check the power at the outdoor unit main Correction 1 Repair the outdoor unit main sub control wiring 2 Correct the RC connector connection 3 Turn ON the outdoor unit main power Example IO Notes d gt o O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F04 F05 F22 Alarm sensor trouble Compressor 3 discharge temperature sensor trouble Alarm conditions 1 Discharge temp of 100 C or higher was detected 20 minutes or more after that compressor stopped operating 2 Discharge temp of 80 C or higher was detected after all compressors had been stopped for 60 minutes or longer 3 A D step is 10 steps or less short circuit Probable cause 1 Sensor malfunction e Sensor element malfunction e Sensor wiring is partially disconnected resulting in increased electrical resistance Xx This alarm does not occur when the wiring is cut or when the connector is not connected to the outdoor unit PCB 2 Crossed wiring or installation error e The discharge temperature sensor of that compressor is connected to the discharge tube of the other compressor e The connector for the discharge temperature sensor of the problem compressor is connected to the outdoor unit PCB connector for the other compressor 3 Outdoor unit PCB failure 4 The check valve on the discharge tube for that compressor is wet 5 An air short blockage in the area around the outdoor unit has
138. n the ON OFF button of the wired remote controller is pressed again operation is started after the alarm is cleared During this operating mode CHECK flashes on the wired remote controller only to inform the user that operation is in backup mode However this is not displayed on any other control devices e In order to cancel automatic backup mode it is necessary to reset the power on the control PCB of the outdoor unit where the outdoor unit No setting S007 on the control PCB is set to No 1 main unit CAUTION If the power is not reset on the control PCB of the No 1 outdoor unit main unit backup mode operation will continue after the repairs are completed Backup operation is intended as emergency operation until repairs are made Have repairs made as soon as possible 4 2 Manual Backup This backup operation is the conventional method of backup operation It involves disconnecting the failed outdoor unit from the system and operating only the normal outdoor units 4 2 1 Backup operation by disconnecting the outdoor unit 1 Changing the outdoor unit control PCB settings lt lf the failed outdoor unit is not the No 1 unit gt e Settings at No 1 unit main unit No of outdoor units S006 Subtract the number of failed units from the current setting e Settings at normal outdoor units other than the No 1 unit No particular changes e Settings at the failed outdoor unit No particular changes However close a
139. ncerning operation of the outdoor unit maintenance remote controller refer to the Outdoor unit maintenance remote controller item A With the 3 way valve it is difficult to determine whether operation is heating or cooling by touching the tubing 6 Close the suction tube and balance tube on the outdoor unit to be repaired Then slowly close the liquid tube service valve 7 When the low pressure at the outdoor unit to be repaired reaches 0 5 MPa or below press the ON OFF button on the outdoor unit maintenance remote controller to stop all the units Then immediately fully close the discharge tube valve on that outdoor unit While closing the valves the rise in discharge temperature or another factor may AN cause a protective device to activate stopping the operation of the outdoor unit If this occurs immediately fully close the discharge tube valve on the outdoor unit to be repaired 8 Connect the high pressure gauge side of the manifold gauge to the high pressure outlet port on the outdoor unit to be repaired and connect the manifold gauge to the refrigerant recovery device Be sure that no air enters the tubing at this time l i f 3 WAY SYSTEM 9 Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures 9 Short circuit the vacuum application pin on the outdoor unit control PCB of the unit to be repaired Then turn ON the outdoor unit power When the vacuum application pin is short circuited and the p
140. ng A B Open circuit C Insulation failure D Short circuit Trouble diagnosis is based on the following remote controller displays H03 Compressor 1 INV compressor center H11 H12 H13 Compressor 2 constant speed compressor 1 left side when viewed from front H21 H22 H23 Compressor 3 constant speed compressor 2 right side when viewed from front not present in types 0705 0905 1155 A judgment is made based on factors that include the following coil resistance varies depending on the compressor insulation resistance current leakage breaker operation oil and refrigerant fouling odor pressure and noise Reference Insulation resistance Use a DC 500 V insulation resistance meter and measure the insulation resistance between the electrified and non electrified parts a Motor Min 300 MO b Compressor gt Min 100 MQ servicing part c Unit gt Min 10 MQ This is due to the presence of refrigerant which decreases the insulation resistance Minimum insulation resistance as required by generally accepted requirements is 1 MO JUDGMENT START Is there burning of the failed Follow the instructions in compressor motor 3 Discharging Compressor Oil YES and drain the oil from the failed compressor Then inspect Follow the instructions in Is the color phase 4 0 or above or is a 3 Discharging Compressor Oil and YES sharp odor present drain the oil from all co
141. ng oil in the removed compressor 2 2 1 Additional oil to be charged 2 2 1 remaining oil in the removed compressor 2 1 2 rated oil amount 0 1 4 Ifthe result is a negative amount remaining oil in the removed compressor is less than the rated amount it is not necessary to discharge the extra oil from the system For the method used for additional oil charging after compressor replacement refer to 8 1 If Refrigerant Has Already Been Charged to Outdoor Unit 2 19 l i f 3 WAY SYSTEM 9 Pumping Out Refrigerant from Outdoor Unit Outdoor Unit Repair Procedures Required equipment and tools Jumper wire with clips adjustable wrench set of manifold gauge valves refrigerant recovery unit pre purged refrigerant cylinder for recovery flat head screwdriver and outdoor unit maintenance remote controller This work is performed in order to collect the refrigerant from an outdoor unit where repairs other than compressor replacement will be performed into other outdoor units and indoor units and the refrigerant tubing 9 1 If Remote Controller CZ RTC2 is Used for Maintenance of Outdoor Unit 1 Refer to 4 Backup Operation and perform backup operation 2 Connect the manifold gauge valves at the Lo side to the low pressure outlet port of the outdoor unit to be repaired Also connect the refrigerant recovery cylinder to any one of the normal outdoor units at the liquid line service port Schrader type push to re
142. nit where the compres sor was replaced Tube with flare nut Brazed locations 2 Cushioning rubber a Bolt Temporary fastening Crankcase AF Washer 1 bolts 2 inner legs heater Cushioning rubber Inner 1 leg Rubber washer 1 Fig 21 Fig 22 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures B Replacing the constant speed compressor 1 Compressor 2 on remote controller alarm display E Removal 1 Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compres sor will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement 2 Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct and remove the corresponding parts from the outdoor unit where the compressor will be replaced Remove the cap at the compressor terminal plate Disconnect the power terminal Remove the crankcase heater 3 Remove the bolts 3 locations washers and spacers 1 each at the 3 locations shown in the figure The compressor rear leg is not anchored G 6 Prepare to disconnect the 3 brazed locations shown in the figure Constant speed compressor left side Brazed locations 3 Remove discharge sensor yy y Protect the oil equalizer tube connectors Bolt Washer 1 Rubber washer 1 1 each at the 3 locations z wio y PRAD
143. not operate if no outdoor unit has been set as unit No 1 Required settings for Test Run Outdoor unit No 1 Outdoor unit Nos 2 3 At time of shipment On site setting Attime of shipment On site setting System address System 1 30 No of indoor units 1 1 40 units 1 Not necessary No of outdoor units 1 1 3 units 1 Not necessary Unit No 1 Unit Nos 2 3 This system can be expanded to connect a maximum of 3 outdoor units The system maximum capacity is 48 HP The CCU functions are disabled at all units except the unit that is set as unit No 1 Therefore no problems will result even if the system address No of indoor units and No of outdoor units settings are made at the other units However making these settings may be convenient for manual backup operation as it eliminates the necessity of making the settings again if unit No 1 fails If unit No 1 fails and the power supply to it is interrupted it will be necessary to set a different unit as unit No 1 in order to use manual backup operation y A 3 WAY SYSTEM 2 Selecting Outdoor Unit for Operation Control Functions 2 1 Outdoor Unit Operating Rules Because in this system all outdoor units contain an inverter compressor ordinarily there is no absolute order of priority for compressor operation Therefore there is no order of priority for the outdoor units However it is possible to operate the outdoor units in sequence beginning with unit No 1
144. nowfall sensor as necessary according to the installation conditions 8 6 When the Compressor Magnet Switch Seizing Alarm Occurs Because there is the possibility that the high pressure has increased the fan operates in Max fan mode 8 7 Other This unit includes settings for high static pressure and for Quiet mode For information about these settings refer to the field application functions 3 WAY SYSTEM 9 Demand Control Control Functions Serial parallel l O must be connected in order to perform demand control The below input is received by serial parallel I O and demand control is performed The demand values can be set as needed with this device For more information refer to the field application functions Demand setting P x oom operates to maximum capaci A A A x o Operates at up lo 70 of rated eument O OOO SSS ET OT Shutdownstate SSCS E O Input present x Input not present The rated current indicates the current value that is listed in the catalog or similar material If the capacity of this device is insufficient the inverter compressor raises its operating frequency in order to maintain capacity For this reason it is capable of operating at a current which exceeds the rated current up to approximately 130 10 Indoor Unit Control of the Electronic Control Valve 10 1 Normal Control 1 Except Type El 3 WAY SYSTEM Control Functions
145. nt of oil Also add an amount of oil that is equivalent to the amount that was drained from the oil separator 10 Remove the manifold gauge The connecting port employs a Schrader type push to release valve When disconnecting the hose pressure will be applied from the refrigerant in the outdoor unit 11 Follow the instructions in 10 2 4 Dry core cleaning and perform dry core cleaning of the outdoor unit that failed 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 10 2 3 Replacing all compressors in a system 1 Follow the instructions in 3 Discharging Compressor Oil and drain the oil from the oil separators in all outdoor units Measure the amount of drained oil 2 Follow the instructions in 10 3 Removing and Installing Compressors and replace all compressors in the system 3 Follow the instructions in 6 Checking for Leakage After Repair and check for leaks at all outdoor units and in the tubing S Follow the instructions in 7 Evacuating System and apply vacuum to all outdoor units and tubing 3 Fully close the high and low pressure gauge valves on the manifold gauge then stop the vacuum pump Disconnect the manifold gauge from vacuum pump Connect the manifold gauge to the refrigerant cylinder Be especially careful that air does not enter the tubing A Do not reuse the recovered refrigerant Use a refrigerant cylinder that contains unused refrigerant
146. o the test run servicing materials and check the number of indoor units that is set PETT 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic A address setting again E20 Alarm Alarm code E20 Alarm meaning No indoor units at automatic address setting Alarm conditions When automatic address setting was performed no indoor units were recognized Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut E24 Alarm Alarm code Outdoor unit INV failed to receive communication from other outdoor unit constant speed Alarm conditions After initial communications were completed communications from an outdoor unit stopped Probable cause 1 After initial communications were completed the control wiring between main and sub outdoor units was cut 2 After initial communications were completed the outdoor unit power was turned OFF 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E25 Alarm A A Outdoor unit address setting failure duplication Alarm conditions Communication by outdoor unit main sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause The unit number is set incorrectly Check the unit number again Correct the incorrect unit number setting
147. occurs Probable cause Generally this alarm occurs when the refrigerant pressure balance is uneven at start or when inverter compressor lock occurs there is a missing phase in the inverter compressor wiring or a DCCT failure occurs This can be judged to be starting trouble which is not caused by HIC Exampe et 2 ee el Use a tester to measure the voltage between the DCCT output terminal on the rear of the PCB and the ground If the voltage is not within 2 3 V then the DCCT has malfunctioned CAUTION Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller Blinking inspection display 1 Automatic backup Alarm code Blinking inspection display Alarm meaning Automatic backup is in progress A C units can be operated Status The compressor at one of the outdoor units where the outdoor unit fan is running should be operating Blinking inspection display also occurs when seizing of the compressor magnet SW is detected Because this may also be the case refer to Blinking inspection display compressor magnet SW seizing detection Alarm conditions When alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurred correcting the control device remote controller etc input engages this mode Probable cause Because alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurred check the alarm history then refer to the corresponding items Follow the instr
148. om Outdoor Units and perform refrigerant recovery for the faulty outdoor unit 4 Connect the manifold gauge to the high and low pressure outlet ports Schrader type valves on any outdoor unit Fig 9 Remaining refrigerant may cause internal pressure Check that each valve on the A manifold gauge valves is tightly closed The connection port uses a Schrader type push to release valve 5 Connect the manifold gauge valves refrigerant recovery unit and refrigerant recovery cylinder Quickly connect each part to prevent air from entering the tubing 6 Check that each service valve of the suction line discharge line liquid line and the balance tube for the outdoor unit has opened then perform refrigerant recovery If only a single outdoor unit is installed the balance tube is not used Therefore leave this valve closed To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit q f 3 WAY SYSTEM 6 Checking for Leakage After Repair Outdoor Unit Repair Procedures 6 1 Pressure Check for Leakage of Outdoor Unit After completing repair of the outdoor unit carry out the following leakage check 1 Check that all service valves for suction tube discharge tube liquid tube and balance tube in the repaired outdoor unit are fully closed 2 Connect the manifold gauge valves to the high and low pressure outlet ports of the outdoor unit 3 Feed nitrogen
149. omputer 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F16 Alarm Alarm meaning High pressure sensor trouble abnormal rise in high pressure In some cases this may not be the result of a high pressure sensor malfunction Alarm conditions e High pressure SW activated although the detected pressure was lower 3 03 MPa or below than the high pressure SW activation pressure Undershift e High pressure SW failed to activate although the detected pressure was higher 3 43 MPa or above than the high pressure SW activation pressure Overshift e The saturation temperature at the detected pressure is 5 C or more below the highest indoor unit E1 temperature continuously for 30 minutes e High pressure sensor disconnected or open circuit Probable cause 1 High pressure sensor malfunction 2 Failure to connect the connector to the outdoor unit PCB 3 Failure to open the service valve 4 Clogged tubing 5 Valve leakage 6 Over charging 7 Outdoor unit PCB failure 8 Electrical noise 1 High pressure sensor failure e Check the sensor resistance value Use a tester and measure the resistance between sensor No 1 and No 3 Resistance of less than 10kQ indicates a short circuit or other trouble Resistance of 10kQ 200kQ is normal Resistance of more than 200kQ indicates an open circuit or other trouble e Connect a gauge to the high pressure outlet and check for changes in the value dispalyed by the monitoring software
150. only during cooling operation 1 At indoor units which are stopped operating in fan mode or where the thermostat is OFF the electronic control valve is opened for 1 2 minutes 2 At indoor units where the thermostat is ON the electronic control valve position is opened by 10 pulses from the current position y 3 WAY SYSTEM 13 Discharge Tem peratu re Control Functions lt Alarm Information gt 1 Discharge temperature protection alarm This device sets an upper limit discharge temperature of 105 C for all compressors When the discharge tem perature reaches 105 C that compressor is stopped and restarted If the same high discharge condition occurs 4 times then an alarm occurs After a compressor has stopped that compressor will not operate until the temperature has dropped to or below the start prohibit temperature Discharge temperature protection list Type Constant speed Constant speed Stop temp m aa Start prohibit temp Alarm display 2 Discharge sensor trouble detection control An alarm occurs if the discharge temperature remains abnormally high when the system has been stopped for 60 minutes In this case possible causes include sensor failure and compressor overheating caused by an insufficient level of refrigerant The alarm also occurs if the sensor temperature is at or above the abnormal temperature 80 C when 20 min utes have passed after the compressor stopped In this ca
151. ons 2 A AO External liquid valve control used in special cases when the discharge gas temperature is likely to especially rise 18 8 High Static Pressure Mode Outdoor EEPROM 8F set at each outdoor unit This product can be made compatible with high static pressure by changing the settings By changing the setting item 8F to 6 this product can be made compatibly z A x 3 WAY SYSTEM 18 Service Maintenance Functions Control Functions 18 9 Compressor operating sequence Outdoor EEPROM 49 set at outdoor units which include CCU functions When this setting is set to 1 the compressors start in sequence beginning from the No 1 outdoor unit The setting is 0 at the time of shipment With this setting compressors with lower operating time are started first in order to balance the compressor operating times 18 10 Demand value setting Outdoor EEPROM 1A 1B set at outdoor units that include CCU functions Demand setting Control Demand meaning Contact 1 Contact 2 capacity Se Demand can be set from 40 130 at Current is limited to the set EEPROM 1A values Demand can be set from 40 130 at Current is limited to the set EEPROM 1B values 18 11 Control function of indoor unit s alarm for communication error When the remote controller is switched on the alarm for communication error occurs even if only one 1 indoor unit is powered off The following setting can make the alarm for com
152. ontroller Be BG Locations where and are displayed Displays the outdoor unit sub bus address which is as shown in Fig 3 currently selected o XX Outdoor system address on main bus line 1 30 YY Outdoor unit sub bus address 1 8 1 appears when there is only 1 outdoor unit COPY ES PROGRAM L aa a m J TMEROFR a E O ea O LED Fig 3 lt Sample displays gt 01 lt No of connected indoor units gt 02 lt Unit Nos 1 2 3 and 4 are 4 units connected connected gt Fig 4 Fig 5 3 WAY SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller bal E Concerning the 7 segment 4 digit display remote controller timer display 45 Jo x The connected unit Nos are displayed as shown below using the 7 segment 4 digit lada display and the colon e Display for unit Nos 1 20 OFF OFF OFF OFF 1 6 11 16 Meaning of display colon Dl db gt dd del O o ED GD L D D O D D g 0 O o av No avis v2 21 40 41 60 61 80 ON ON ON ON O is not displayed e Display for unit Nos 21 40 91 OFF 26 ORE 31 Orr 36 OFE Meaning of display colon O pe Dl pe pe O o 8 2 x 27 x ED 37 ED A ds ON ON ON ON e The
153. operation for all units 1 If the remote controller CZ RTC2 is used for maintenance of the outdoor unit Connect the outdoor unit maintenance remote controller to the RC connector CNO06 3P BLU on any one of the outdoor unit control PCBs Then start a test run of all units Press and hold the CHECK button for 4 seconds Press the MODE button and change to cooling operation Even if the mode that is originally displayed is Cool be sure to press the A MODE button once or more to change to cooling operation Pressing the MODE button ensures that heating cooling operation is not mixed and that al units are operating in either Heating or Cooling mode Use the remote controller CZ RTC2 to check the operating status of the indoor units Check that all units are operating in Cooling mode AN With the 3 way valve it is difficult to determine whether operation is heating or cooling by touching the tubing Bl 3 WAY SYSTEM 5 Recovering Refrigerant Outdoor Unit Repair Procedures 2 If the remote controller CZ RTC2 is not available for maintenance of the outdoor unit Determine the outdoor unit where the unit No setting S007 3P DIP switch BLU on the outdoor unit control PCB is set to No 1 Short circuit the mode change pin CN101 on the outdoor unit control PCB of the No 1 unit Then short circuit the test run pin CN023 to start operation Short circuiting the mode change pin ensures that he
154. orsepower determined by the indoor units where thermostats are ON 2 Control when outdoor unit heat exchanger is acting as a condenser when all units are in Cooling mode or at start of mixed operation when cooling load is high Control time Minimum 1 min Maximum 10 min until max pressure sensor temp E1 gt 35 C Outdoor units All outdoor units operate at maximum horsepower Electronic control valve Valves at all indoor units operate at 480 pulses Indoor RAP valve kit Valve kits at all indoor units operate in heating mode ON status units Fan Fan operates at the set fan speed stops or operates at L speed depending on the indoor unit operation mode When the above operation is finished normal operation starts at the horsepower determined by the indoor units where thermostats are ON 4 2 System Refrigerant Oil Recovery Control 4 2 1 System refrigerant oil recovery cycle This control is performed using the cooling cycle during cooling operation and using the heating cycle during heating operation 4 2 2 Start of system refrigerant oil recovery control When the oil level in an operating compressor changes to 0 the compressor stops after 120 seconds If this compressor repeats this operation 3 times and the oil level does not reach 2 system refrigerant oil recovery control is started When the compressor has stopped because the oil level is O a count is added to the alarm counter The counter for this co
155. ower is turned ON all Ar solenoid valves in the outdoor unit are forced open allowing the refrigerant to be recovered from all tubes which are separated by solenoid valves If this work is not performed it will not be possible to recover all of the refrigerant at the refrigerant recovery device Be sure to perform this step 10 Open both Hi and Lo side valves on the manifold gauge valves and recover the refrigerant remaining in the outdoor unit After that measure the amount of recovered refrigerant NOTE To determine the completion of refrigerant recovery follow the instructions that came with the refrigerant recovery unit 9 2 If Remote Controller CZ RTC2 is Not Available for Maintenance of the Outdoor Unit 1 Refer to 4 Backup Operation and perform backup operation 2 Connect the manifold gauge valves at the Lo side to the low pressure outlet port of the outdoor unit to be repaired Also connect the refrigerant recovery cylinder to any one of the normal outdoor units at the liquid line service port Schrader type push to release valve Perform the connection work quickly so that no air is allowed to enter Fig 18 Connecting the refrigerant recovery cylinder is done to prevent pressure from rising excessively during the backup operation by recovering the refrigerant from the outdoor unit to be repaired Measure the weight of the refrigerant and cylinder itself beforehand and provide sufficient safety measures
156. per a single outdoor unit is approx 15kg Thus in order to collect all refrigerant from the system a separate refrigerant recovery unit is necessary Follow these procedures to correctly perform pump down Perform work correctly according to the work procedures given below Connect the manifold gauge to the high and low pressure outlet ports on the outdoor unit where pump down will be performed Be sure that no air enters the tubing at this time Fully close the discharge tube valve on the outdoor unit where pump down will be performed Follow the instructions in 5 2 1 Cooling operation for all units and operate all units in Cooling mode for approximately 5 minutes Then fully close the liquid tube valve on the outdoor unit where pump down will be performed When the high pressure gauge reaches 2 8 MPa or higher or the low pressure gauge reaches 0 5 MPa or below at the outdoor unit where pump down is being performed press the ON OFF button on the outdoor unit maintenance remote controller to stop operation at all units Then immediately fully close the suction tube valve on the outdoor unit where pump down is being performed If the outdoor unit maintenance remote controller is unavailable follow the procedure below to stop all of the units Pull out the SCT connector 2P YEL CN231 on the outdoor unit control PCB of the unit where pump down is being performed When the SCT connector is pulled out immediately alar
157. perating and the liquid valve is ON check that the secondary side of the liquid capillaries is cold 2 Insufficient refrigerant Trouble Liquid effectiveness is poor Check Check whether or not the superheating temperature is declining if the evaporator mechanical valve is opened to 300 pulses or more after checking for foreign object intrusion 3 Foreign object intrusion Trouble Liquid valve effectiveness is poor Check Check that there is no difference in the condensation or frost conditions between the strainer primary side and secondary side tubing 4 Crossed thermistor Trouble The discharge temperature of the other compressor is high although only this compressor is operating When the liquid valve turns ON the discharge temperature of the other compressor decreases 5 Accumulation of refrigerant in stopped outdoor units Trouble System is OK when all outdoor units are operating however symptoms of insufficient gas occur when a certain outdoor unit is stopped e Condensation or frost is visible up to the top of the accumulator of the stopped outdoor unit e After an outdoor unit stops there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time e When an outdoor unit starts after being stopped for a long time the start is accompanied by much vibration e Representative parts include the liquid capillaries secondary side of capillaries will be cool during cooling operation mechanica
158. perature shift Auto heat cool selects the operating mode automatically based on the ee Shifts the intake temperature during cooling and dry operation e intake temp rature Enabled only when the body thermostat is used Temperature shift for difference between the room temperature and the temperature set on the 1E cooling heating change in remote controller This setting establishes a shift temperature for the heating auto heat cool mode cooling temperature setting relative to the remote controller temperature setting Cooling temperature setting Shift temperature Remote controller temperature setting Shift temperature Heating temperature setting A 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions Item code Description 1F Upper limit 20 Lower limit 21 Upper limit This setting changes the temperature range upper limit and lower limit 22 Lower limit Change to the remote which is set from the remote controller or central control device control temperature The set upper limit must be greater than or equal to the lower limit If the 23 Upper limit setting range temperature setting is to be a single point set the upper limit and lower Cooling 24 Lower limit limit to the same temperature 25 Upper limit Auto 26 Lower limit heat cool During heating operation the humidifier operates when the heat Humidifier operation w
159. plied by the A refrigerant in the outdoor unit The high pressure sensor connection port on the outdoor unit employs a Schrader type valve 11 2 Removing the Low Pressure Sensor 1 Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct Cover and remove the corresponding components from the outdoor unit where the low pressure sensor will be removed If there is sufficient space to allow removal of the left side panel then it is possible to remove the low pressure sensor without removing the electrical component box and duct 2 Disconnect the low pressure sensor connector 3P WHT from terminal CNO24 on the outdoor unit control PCB of the outdoor unit where the low pressure sensor will be removed 3 Use 2 adjustable wrenches in combination to remove the low pressure sensor When removing the low pressure sensor internal pressure will be applied by the A refrigerant in the outdoor unit The low pressure sensor connection port on the outdoor unit employs a Schrader type valve 11 3 Installing the High and Low Pressure Sensors 1 Use 2 adjustable wrenches in combination to install the high and low pressure sensors Low pressure sensor High pressure sensor AO ai Q x A A gt ETE NY ee e Mil E Fig 32 3 WAY SYSTEM 12 Replacing 4 way valve Outdoor Unit Repair Procedures When replacing 4 way valve of models U 14MF1
160. ponents that were removed Re install the electrical component box in the same position as it was before Be sure to check for looseness of the power terminal connection at the compress or Ara terminal plate and to check by pulling vertically on the connections If the termi nals become disconnected easily replace the wiring Assy 13 Follow the instructions in 7 Evacuating System and apply vacuum to the outdoor unit where the compres sor was replaced 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures C Replacing constant speed compressor 2 Compressor 3 on the remote controller alarm display E Removal 1 Connect the manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compressor will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement 2 Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct and remove the corresponding parts from the outdoor unit where the compressor will be replaced 3 Remove the cap at the compressor terminal plate Disconnect the power terminal 4 Remove the crankcase heater 5 Remove the bolts washers and rubber washers 1 each at 3 locations The compressor right inner leg is not anchored 6 Prepare to disconnect the 3 brazed locations shown in the figure 27 Discharge sensor outlet Brazed locations 3 Constant speed
161. pressor Oil Outdoor Unit Repair Procedures High pressure outlet port For 7 94mm dia connector Oil tube service port For 6 35mm dia connector Low pressure outlet port For 7 94mm dia connector Oil Manifold gauge Lo 9 Hi Vacuum pump Fig 17 8 3 Charging Additional Compressor Oil after replacing compressor The rated amount of oil is pre charged in the compressors as given below Compressor model Pre charged amount of oil liters U 8MF1E8 C 9RVN273HOU 1 1 9 Inverter controlled rotary compressor JT160G KTYE SB 1 2 1 Constant speed scroll compressor U 10MF1E8 C 9RVN273H0U 1 1 9 Inverter controlled rotary compressor JT170G KTYEOSB 1 2 1 Constant speed scroll compressor U 12MF1E8 C 9RVN273HOU 1 1 9 Inverter controlled rotary compressor JT170G KTYE SB 1 2 1 Constant speed scroll compressor U 14MF1E8 C 9RVN273HOU 1 1 9 Inverter controlled rotary compressor JT160G KTYE SB 2 2 1x2 Constant speed scroll compressor U 16MF1E8 C 9RVN273HOU 1 1 9 Inverter controlled rotary compressor JT170G KTYE SB 2 2 1x2 Constant speed scroll compressor When replacing a faulty compressor be sure to first measure the amount of remaining oil in the compressor Charge additional new oil equal to the difference in the remaining oil and the rated amount as listed above For example Type of replaced compressor JT170G KTYE SB Remaini
162. r 1 and the constant speed compressor is compressor 2 With types 14HP and 16HP the INV compressor is compressor 1 and the constant speed compressors AC1 AC2 are compressors 2 and 3 E06___ Outdoor unit failed to receive serial communication signals from indoor unit 5 9 Automatic address setting start is prohibited E15 Automatic address setting alarm too few units E20 5 11 5 11 5 11 E24 Outdoor unit INV failed to receive communications from another outdoor 5 10 unit constant speed E25 5 11 E26 5 11 E29 5 11 F04 5 12 F05 F22 F06 F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 Out F08 F23 F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 Out F25 F26 5 13 F31 Outdoor unit non volatile memory EEPROM trouble 5 17 H03 5 18 HO5 5 18 HO6 5 19 HO7 No oil alarm 5 20 HO8 Compressor 1 oil detection sensor connection trouble 5 20 5 18 5 18 H21 5 17 H22 5 17 H23 5 18 H25 5 18 H27 Compressor 2 oil detection sensor connection trouble 5 20 H28 Compressor 3 oil detection sensor connection trouble 5 20 H31 HIC trouble alarm L04 Outdoor system address duplication Outdoor unit capacity not set Incorrect wiring of remote group control wiring in case of shared solenoid valve kit Outdoor unit model mismatch 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Compressor 1 discharge temperature trouble High pressure switch
163. r 4 seconds or longer Use the temperature setting La and _ _ buttons to change the item code The item codes and setting data are shown in the table below Mon cma Use the timer time 4 and 5 buttons to change the setting data To confirm the changed setting data press the button At this time aga stops blinking and remains lit During this mode Gaia is displayed blinking The display shows the set outdoor unit address System XX YY System XX System address YY Address at outdoor unit sub bus item code number DN value in the table Fig 6 below and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig and the last 4 digits Fig When the first 4 digits are displayed the bottom dot of the colon is lit To end the setting mode press the CHECK button The display returns to the normal display mode O Display of first 4 digits Display of last 4 digits a i ll ee l nos re SETTING ag lt Refrigerant type gt A and are displayed alternately Example shows 0000 0410 R410A List of Item Codes DN Parameter Description MES estada ea 224 8
164. r Procedures 10 3 Removing and Installing Compressors When removing and installing compressors use sufficient caution to ensure that moisture or other substances do not enter the refrigerant tubing system 10 3 1 Replacing compressors For all models U 8MF1E8 U 16MF1E8 follow the replacement procedure below A Replacing the inverter compressor Compressor 1 on remote controller alarm display E Removal 1 Connect a manifold gauge to the high and low pressure outlet ports at the outdoor unit where the compressor will be replaced Connect the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement in the outdoor unit tubings Follow the instructions in 1 Removing Panels and 2 Removing Electrical Component Box and Duct and remove the corresponding parts from the outdoor unit where the compressor will be replaced Remove the cap at the compressor terminal plate Disconnect the power terminal Remove the crankcase heater Remove the 3 bolts and remove the washers and rubber washers quantities indicated in the figure below Disconnect the tube with flare nut using two adjustable wrenches At this time cover the tube in place with waste cloth while watching out for oil leaks Then cap the disconnected tube and mount the flare nut on the compressor Tighten the flare nut with a seal bonnet 1 4 in it rena If oil remaining in the compressor reaches the equalized oil level oil will come pouring o
165. r the refrigerant tubing 5 Adjust the amount of refrigerant 6 Correct the trouble 1 Sensor wiring is partially cut Notes This alarm does not indicate that the sensor is disconnected In order to prevent overheating during operation the outdoor units in this system will not allow a compressor to start if the discharge temperature does not decrease while the compressor is stopped If a sensor malfunction results in continuous detection of a high discharge temperature then the compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case F06 F23 F25 Alarm C Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperature sensor trouble at Aam meanma ce heat oxchangor 2 Qas temperature sensor tuu at outdoor heat saehanger O 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Pe Example J gt s O Notes d o O F07 F24 F26 Alarm Alarm code F07 F24 F26 Liquid temperature sensor trouble at outdoor heat exchanger 1 Liquid temperature sensor trouble at outdoor heat exchanger 2 L
166. rdinary Display Controls and Functions 2 00 ee ee eee eee eee 3 4 Monitoring Operations ovoxicccvrcrcar a eee a ee ee 3 9 Outdoor Unit Alarm History Monitor 000 eee eee 3 11 Mode Settings sn uri carre aa AA ci a i 3 12 1 Overview OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER CZ RTC2 for 3 WAY SYSTEM E About the outdoor unit maintenance remote controller The outdoor unit utilizes nonvolatile memory EEPROM on its PCB This allows EEPROM data to replace the setting switches that were present on previous PCBs The outdoor unit maintenance remote controller is used to set and change these EEPROM data In addition to setting and checking the outdoor unit EEPROM data this remote controller can also be used to monitor the outdoor unit alarm history monitor the various indoor and outdoor temperatures and check the indoor unit connection status number of units operating mode etc 3 WAY SYSTEM Outdoor Unit Maintenance Remote Controller Service Checker Section PROGRAM COPY Outdoor unit maintenance remote controller does not function as an ordinary remote controller It is therefore only used for test runs and CZ RTC2 during servicing Outdoor unit maintenance remote controller System diagram Special service checker wiring Servicing No CV6231785082 Outdoor unit Inter unit control wiring
167. s YY Outdoor unit sub bus address always 1 for 3 WAY ECO i units Unit code is displayed as 01 08 01 indicates the most recent alarm The alarm history is indicated by the alarm code If there have been no alarm codes is displayed To clear the alarm history press the button The outdoor unit alarm history will be cleared To exit press the CHECK button The display returns to the normal remote controller display 3 WAY SYSTEM Outdoor Unit Maintenance Remote Controller 3 WAY SYSTEM 6 Mode Settings Outdoor Unit Maintenance Remote Controller E Setting mode 1 i Display of first 4 digits lt Operating procedure gt Press and hold the CHECK button and E VENTILATION button simultaneously for 4 e j giz igi seconds or longer LILILILI Use the temperature setting _4_ and Ey buttons to change the item code The item codes and setting data are shown in the table below Use the timer time 4 and 5 buttons to change the setting data PROGRAM To confirm the changed setting data press the E button At this time Qa stops blinking and remains lit During this mode ENT is displayed blinking The outdoor unit address display section displays ALL the item code number DN value in the table and the setting data 8 digi
168. s not match the number that was set Automatic address setting was completed successfully After the power is turned ON and automatic address setting is not in progress the number of detected indoor units connected to that system matches the number that was set and regular communications are occurring Automatic address setting is in progress At time of automatic address setting the number of indoor units did not match the number that was set Alarm display Aa LED 1 blinks M times then LED 2 blinks N times The cycle then repeats Blinking alternately M 2 Palarm 3 Halarm 4 Ealarm 5 F alarm 6 L alarm N Alarm No Example LED 1 blinks 2 times then LED 2 blinks 17 times The cycle then repeats Alarm is P17 3 Remote Controller Servicing Functions Sensor temperature display function displayed both when unit is running and stopped e Use the following check procedure to display the sensor temperatures from the remote controller indoor unit and outdoor unit sensors on the remote controller display lt Check procedure gt Press and hold the CHECK button and button simultaneously for 4 seconds or longer 2 The following appears on the remote controller LCD display unit No X X main unit No item code XX sensor address and service monitor 00XX sensor temperature See figure at right Press the temperature setting CA and Cv buttons to change the item code to the sensor addre
169. scharge Intake Controller valve valve temp control valve Thermostat OFF f Thermostat ON Heating Thermostat OFF Thermostat ON Thermostat OFF Thermostat ON Thermostat OFF Cooling Auto Cooling Auto Heating Fan A 3 WAY SYSTEM 12 Indoor Special Control Control Functions 12 1 Switching Control EC control If the settings indicate that an RAP valve kit is present for type El the setting on initial shipment from the factory is present then the thermostat does not turn ON for 3 minutes after the indoor unit operating mode is changed from any mode other than heating including stopped to heating with thermostat ON This is done in order to bal ance the pressure within the heat exchanger With type El this control is activated after defrost control is completed turning the thermostat OFF for 3 minutes 12 2 Indoor Unit Thermostat ON OFF Delay Timer 1 After the thermostat turns ON at an indoor unit the thermostat will not be turned OFF by the room temperature thermostat or discharge temperature thermostat for a period of 3 minutes However if the condensation temperature reaches or exceeds the PX temperature the thermostat turns off in order to prevent overload 2 After the thermostat turns OFF at an indoor unit the thermostat will not turn ON again for a minimum of 3 minutes 12 3 Indoor Unit Refrigerant Oil Self Recovery Control This control is performed periodically
170. se it is possible that the discharge temperature from a different outdoor unit is being detected due to an error in the installation of the discharge thermistor Discharge sensor failure list Type Inverter Constant speed Constant speed Stop temp F04 F05 F22 A 3 WAY SYSTEM 14 Current Protection Control Functions 1 Fan motor Alarm o Description i P22 Occurs when the fan motor detects overcurrent or when the motor is locked and does not turn 2 Inverter compressor Alarm 303 Description Occurs during ordinary operation when overcurrent 32 5 A is detected P26 Occurs under the same conditions as P16 when the inverter compressor is operating at or above 80 HZ P29 Occurs when missing phase or overcurrent 48 A is detected at inverter compressor start H31 Occurs when HIC detects overcurrent 75 A or when an abnormal high temperature 150 C is reached The inverter current includes a primary current and secondary current The alarm judgment utilizes both currents Generally the secondary current is larger that the primary current 3 Constant speed compressor An alarm occurs when overcurrent or lock current is detected List of overcurrent and lock currents Outdoor unit Constant speed Overload Lock current type compressor current A A 13 7 10 hp 14 3 12 hp 14 3 13 7 14 hp 13 7 14 3 16 hp 14 3 List of Alarms pala Compressor 2 Compressor 3 EE Overcurrent
171. sepower increase prohibited Area B 2 0 1 9 Horsepower decrease Area C 0 15 30 Maximum requirement level L Depending on the maximum requirement level of the indoor unit the judgment temperatures for each area may vary as shown in the figure example 1 For indoor units that are operating in Cooling mode if one unit is selected for a test run then the air intake temperature difference difference between the room temperature setting and indoor unit air intake temperature is ignored and areas B and C are considered to be area A for control purposes This is used for additional charging test run checks etc For this reason vapor may be discharged if the test run continues for a long period of time however this does not indicate a problem In addition the test run is canceled automatically after 1 hour 2 3 4 Even within the same area the compressor capacity varies depending on the refrigerant temperature For 6 minutes after the compressors start area C is considered to be area B for control purposes During special control control of the compressor capacity according to Te is not performed 5 wo If the thermostat turns OFF while Te is within area C the next time the compressor starts it may restart from a lower capacity 6 When the area changes to area C area C is considered to be area B for control purposes for the first 6 minutes even if the horsepower is the minim
172. shipped from the factory However the automatic backup function can be disabled by changing this setting to 1 y 3 WAY SYSTEM 18 Service Maintenance Functions Control Functions 18 5 Automatic Backup Mode Outdoor EEPROM 49 set only on outdoor unit No 1 Two types of automatic backup modes when multiple outdoor units are installed can be selected Backup outdoor units operate only during special control Setting at time of factory shipment 1 Only the backup compressors remain stopped Other OK compressors installed in the same outdoor unit operate as normal Even when 1 is set the outdoor unit will remain stopped if all of the compressors in the outdoor unit have failed If only 1 outdoor unit is installed the operation is according to setting 1 even if 0 is set 18 6 Snowfall Input Switching Outdoor EEPROM 4A set at each outdoor unit The snowfall sensor input terminal on the outdoor unit PCB is used for input from the snowfall sensor It is also possible to connect an external timer and use it to enable nighttime Quiet mode operation Used for snowfall sensor input setting at time of factory shipment Used for Quiet mode input 18 7 Optional Solenoid Valve Control Operation Setting Outdoor EEPROM C0 set at each outdoor unit No output setting at time of factory shipment Refrigerant shut off valve control for cooling when the outdoor air temperature is below standard conditi
173. ss of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor temperature relationship table on next page If group control is in effect press the UNIT button to change to the unit you wish to monitor Press the CHECK button to return to normal remote controller operation lt Note gt The temperature display for units that are not connected appears as e f monitor mode is engaged during ordinary operation the only parts of the LCD display that change are those shown in in the figure The other parts remain unchanged during normal operation 3 WAY SYSTEM Trouble Diagnosis No SL ei aa ro SET DATA A J CODE No CZ RTC2 Example i Unit No HAL Item code sensor address DU XX Discharge temp TD 2 de 3 WAY SYSTEM 3 Remote Controller Servicing Functions Trouble Diagnosis Sensor Temperature Relationship Table Location where sensor Sensor address Sensor type Senso Sensor type is installed r address Remote controller temperature 06 Discharge temperature sensor Indoor unit intake temperature Indoor unit heat exchanger Indoor unit electronic expansion temperature E1 valve position Indoor unit heat exchanger temperature E3 Outdoor unit 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis With types 8HP 10HP and 12HP the INV compressor is compresso
174. sure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference gt Sensor failure No difference gt PCB failure X It is convenient at this time to have a discharge temperature sensor on hand 2 Crossed wiring or installation error Trouble Although the other compressor is operating and this compressor is stopped the discharge temperature of the other compressor does not increase and the discharge temperature of this compressor rises The discharge temperature remains high immediately after the compressor stops Wait for some time after the compressor stops and observe Check for crossed wiring and installation errors Continued 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Check 3 Leakage from the discharge tube check valve Trouble Although the other compressor is operating and this compressor is stopped the discharge temperature of this compressor rises together with the temperature of the other compressor 4 The ambient temperature around the outdoor unit when it is stopped is 43 C or higher 5 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble It is necessary to provide a line filter or carry out other noise countermeasures Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Carry out noise countermeasures 4 Repai
175. switches between heating and i O fieros ser e The specifications are equivalent to the heating cooling inputs on the previous outdoor unit PCBs e The display shows the operating mode of the indoor unit with the lowest unit No O All units test run Fig 2 lt Operation gt The CHECK button switches test run ON OFF for all indoor units e Press and hold for 4 seconds to turn ON TEST is displayed while the test run is in progress e The status of test runs that are started from the indoor unit remote controller are not displayed on the outdoor unit maintenance remote controller e Double speed e Do not use for actual operation Doing so may damage the devices lt Operation gt The timer button 4 is used to switch between double speed and normal operation e During double speed operation the SLEEPING MODE ES mark is displayed 3 WAY SYSTEM 3 Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller E Display functions Item code ni o LILI Outdoor unit alarm O No of connected indoor units Unit Nos of connected indoor unit Operating status of indoor unit Thermostat ON status of indoor unit No of connected outdoor units Unit Nos of connected outdoor un
176. t Check that the connector is not partially disconnected Wiggle the connector to check the connection These symptoms will not occur if the connector is completely disconnected or the wire is cut In these cases alarm Hx3 occurs e Current of 7A or higher was detected although the compressor was stopped or a higher current was detected at occasional intervals e The compressor continues to operate at a time when the outdoor unit should be stopped such as when all indoor units are stopped gt Check whether or not 200 V is output from the PCB to the magnet SW If the voltage is output there is a PCB failure 3 Installation error e CT1 connector is connected to the compressor 2 side e CT1 circuit is connected to the compressor 2 side e CT2 connector is connected to the compressor 1 side e CT2 circuit is connected to the compressor 1 side 4 Electrical noise Correction 1 Replace the CT circuit 2 Replace the magnet SW 3 Replace the PCB If the above probable causes are not the cause of the alarm it is possible that in rare cases the alarm may be caused by the effects of noise See notes The effects of electrical noise are difficult to identify unless a PC is connected and the conditions are monitored for a long period of time y 3 WAY SYSTEM 6 Inspection of Parts Trouble Diagnosis 1 High pressure switch 63PH1 63PH2 63PH3 e 63PH1 Disconnect the CN042 connector 3P WHT from the outdoor unit control panel Measure
177. t gas display appears 4 Canceling judgment mode When judgment mode is cancelled the LED returns to the standard status display OFF unless an alarm or other event has occurred 1 Automatic cancel Judgment mode is canceled automatically when 4 hours have passed after it was started 2 Forced cancel Short circuit the CHECK pin while the judgment mode display is active in order to cancel judgment mode lt Reference gt General Guidelines for Insufficient Gas and Overcharge Judgment in automatic judgment mode can be problematic in some cases Therefore the following guidelines are provided for general judgment of the refrigerant amount e Symptoms of insufficient gas Cooling There is an indoor unit where the position of the electronic control valve is much higher open by operation 300 pulses or more than it was at start and the difference E3 E1 at that indoor unit is large 15 C or more Heating There is an outdoor unit where the position of the electronic control valve is much higher open by operation 300 pulses or more than it was at start and the difference Liquid temp Gas temp at that outdoor unit is large 15 C or more e Symptoms of overcharge Cooling The high pressure sensor temperature is 57 C or higher and the difference Pressure sensor operation temp Liquid temp at that outdoor unit is large 15 C or more Heating There is an indoor unit where the position of the electronic con
178. t occurs Even if the total time has not reached 35 minutes if there is 1 or more outdoor units that fulfills the defrost detection conditions all operating outdoor units perform defrost control at the same time Defrost control is also performed at outdoor units where the outdoor unit heat exchanger is not functioning as an evaporator such as stopped outdoor units 4 3 5 Reverse cycle defrost Reverse cycle defrost is performed in systems where only 1 outdoor unit is connected to the refrigerant system e Defrost flow E Evaporator operation C Condenser operation S Shut off EC Switching from evaporator operation to condenser operation CE Switching from condenser operation to evaporator operation Defrost preparation Defrost in progress Defrost end Outdoor unit status E gt C C C gt E Compressor Stopped Operating Stopped Remote Controller Moas Stop S E S 1 Cooling S E S 2 Heating C gt E E Defrost E gt C Fan S E end 5 1 Cooling S E judgment S 2 Heating C gt E E E C Cooling Thermostat ON E E E Thermostat OFF S E S Heating Thermostat ON C gt E E E C Thermostat OFF CE E E C Auto Auto Cooling Thermostat ON E E E Thermostat OFF S E S Auto Heating Thermostat ON C gt E E E gt C Thermostat OFF C gt E E E C Time 1 min Max 12 min 1 min Type El performs E C for
179. t valve kit valve kit valve kit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit 7 7 v v y O Yen ate 7 7 7 Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote controller controller controller controller controller controller controller controller controller controller jcontroller controller j controller Remote control group wiring more than one 1 indoor unit with type E1 within only one solenoid valve kit Solenoid Solenoid Solenoid Solenoid valve kit valve kit valve kit valve kit Indoor unit Indoor unit Except Indoor unit Indoor unit Except Except Indoor unit Indoor unit Except oS Type E1 lupe El Type Et Type E z Type l Remote Remote Remote Remote Remote x Remote controller controller controller controller controller controller Remote control group wiring with a different refrigerant circuit in the indoor unit 1 When setting installation of common use solenoid valve kit is made by PC check whether the inst
180. tank until the pressure falls to below 101 kPa 755 mmHg 5 Torr for the evacuation drying After the evacuation drying is finished fully close the upper valve Next fully close the manifold gauge valves and stop the vacuum pump To ensure proper evacuation refer to the operating instructions that came with the vacuum pump Manifold gauge Upper side Lo Hi PE valve Lower side valve Vacuum pump Fig 13 E y 3 WAY SYSTEM 8 Charging Compressor Oil Outdoor Unit Repair Procedures 2 Charging compressor oil into oil charging tank Connect a piece of pipe to the lower valve and then insert the other end deeply into the bottom of the oil container Make sure you avoid letting any air be sucked into the tube Next run the vacuum pump and open the manifold gauge valves then open the upper and lower valves to begin charging oil into the charging tank First close the lower and then this one before stopping Upper valve Manifold gauge ee Lo Hi Vacuum pump Fig 14 When the predetermined amount of oil has been charged into the oil charging tank immediately close the lower valve and start the vacuum pump to reduce the pressure below 101 kPa 755 mmHg 5 Torr Then close the upper valve and stop the vacuum pump caution ON Do this operation quickly because compressor oil easily absorbs moisture caurion from the air 3 Charging compressor oil into out
181. tc Check Correction J S Exampe J oo SOS Notes l S O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H11 H12 H21 H22 Alarm Alarm code Alarm meaning Alarm conditions H11 Constant speed compressor 2 overcurrent alarm H12 Constant speed compressor 2 lock current alarm H21 Constant speed compressor 3 overcurrent alarm H22 Constant speed compressor 3 lock current alarm Hx1 During operation the compressor current value exceeded 20 A for 30 seconds or longer However this alarm is not detected for 4 seconds after the compressor starts Hx2 During operation the compressor current value exceeded 29 A for 4 seconds or longer However this alarm is not detected for 2 seconds after the compressor starts Probable cause Correction 1 Compressor failure locked or partially locked 2 CT circuit failure including cut wiring 3 Missing power phase 4 Low power voltage 5 PCB failure 1 Compressor failure partially locked Trouble Current value during operation greatly exceeds the value shown above Check When the current for each phase is measured with a clamp meter or similar instrument check that the current value for all phases is not high If MG was forced ON use caution check that compressor noise will not occur or the compressor will not run with a groaning sound 2 CT circuit failure PCB failure Trouble Check Check for poor connector contact e Check the continuity
182. tems concerned with indoor unit special control 1 16 A f 3 WAY SYSTEM 6 Operation of Solenoid Valves Control Functions 6 1 Refrigerant Control Valve RCV The main purpose of this valve is to detect the flow of refrigerant refrigerant volume on the indoor unit side when the outdoor unit heat exchanger is functioning as a condenser When the valve determines that there are signs of a low refrigerant level refrigerant is supplied from the receiver tank to the system 1 The OFF conditions take priority over the ON conditions for this valve 2 This valve is OFF when the outdoor unit is stopped 3 This valve is ON when special control is in progress Hp 4 Control during normal operation A Cooling operation e This valve turns ON when symptoms of insufficient refrigerant gas occur at an indoor unit e This valve turns ON when the outdoor air temperature is 15 C or below Under these conditions the high pressure is low and refrigerant flow becomes poor e This valve turns OFF when symptoms of refrigerant overcharge are detected at the outdoor unit B Mixed cooling heating operation lt e The RCV turns ON at stopped outdoor units when the heat exchanger at another outdoor unit is functioning as a condenser 6 2 Refrigerant Balance Valve RBV Gas Purge Valve The main purpose of this valve is to detect the flow of refrigerant refrigerant volume on the indoor unit side when the outdoor unit heat exchanger
183. the failed outdoor units C Reset the power at outdoor unit No 1 A 3 WAY SYSTEM 17 Backup Operation Control Functions 2 Disabling operation of 1 compressor At the S010 switch on the PCB of the failed outdoor unit turn ON the switch for the compressor to disable and turn ON the backup switch lt S010 switch gt INV AC1 AC2 Backup ON aalma OFF A Compressor 1 backup B Compressor 2 backup C Compressor 3 backup e In order to perform simultaneous backup operation for 2 or more compressors use a combination of the switch settings shown above N 3 WAY SYSTEM 18 Service Maintenance Functions Control Functions The outdoor unit EEPROM settings can be used for the following functions 18 1 Outdoor Unit Noise Countermeasure EEPROM 05 set at each outdoor unit This unit includes 3 types of Quiet modes However when they are engaged operation is in Quiet mode 24 hours a day Selecting a Quiet mode results in operation that gives priority to reducing noise Because these modes involve restrictions on outdoor unit fan modes and the operation frequency the capacity will be somewhat reduced Normal operation setting at time of 14 E factory shipment 4 12 Noise reduced by approx 1 2 dB from Approx 0 5 hp the catalog value 2 4
184. the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q e 63PH2 Disconnect the CN044 connector 3P RED from the outdoor unit control panel Measure the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q e 63PH3 Disconnect the CN233 connector 3P YEL from the outdoor unit control panel Measure the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q 2 Electronic control valve MOV1 MOV2 MOV3 MOV4 After removing the connector from the PCB use the following methods to check the valves e MOV1 Measure the voltage between plug pin 5 and pins 1 through 4 at the CNO15 connector 6P WHT on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or co replace the coil e MOV2 Measure the voltage between plug pin 5 and pins 1 through 4 at the CNO16 connector 6P RED on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displa
185. the tubing length and height differences 2 Check the operation of system circuit valves 3 Check that there is not an excessive amount of liquid return Check that there is no mechanical valve leakage 4 Check the crank case heater wintertime 5 Check that the oil sensor is not disconnected and that the circuit is not open 1 If insufficient oil is a possibility then charge with additional oil 2 If it is clear that a valve failure has occurred replace the valve Example O Notes D O H08 H27 H28 Alarm Alarm meaning Trouble open circuit with the oil sensor connection at compressor 1 compressor 2 or compressor 3 Alarm conditions This alarm occurs when a connector connection pins 1 and 2 for compressor 1 pins 4 and 5 for compressor 2 and pins 7 and 8 for compressor 3 is open Probable cause Disconnected connector Check that the connector is securely connected 1 Connect the connector 2 Correct the connection at connector pins 4 and 5 Example Je O Notes D O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H31 Alarm Aiomente we HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal indicating abnormal HIC temperature or other trouble from the HIC The HIC judges the current and temperature and outputs the trouble signal In general this indicates trouble with the HIC itself Probable cause Overcurrent in HIC circuit
186. tic Backup Operation This system includes a function for automatic backup operation An alarm is also displayed to inform the operator that a failure has occurred 1 Alarms that result in automatic backup operation When compressor trouble or fan motor trouble makes emergency continued operation impossible automatic backup operation mode is engaged Automatic backup mode is not engaged in cases of communications alarms automatic reset alarms and other instances when emergency operation is possible by pressing the remote controller buttons or changing other conditions The alarms that result in automatic backup mode are P16 P22 P26 P29 H11 H12 H21 H22 and H31 2 Start of automatic backup operation If the above alarms occur the alarm is displayed on the control device Pressing the control device button again starts automatic backup mode 3 Operation 1 When 1 outdoor unit is installed When 1 compressor has failed backup operation is possible using the other compressors However operation does not occur when the outdoor fan is unable to operate as a result of alarm P22 2 When multiple outdoor units are installed When automatic backup mode is engaged the outdoor unit where the above alarm occurred stops operating However if one or more of the compressors is able to operate then this outdoor unit operates only when the operation of all outdoor units is required for special control or other system purposes 4 Alar
187. ting and timer lamp blinking simultaneously ESA Failure of nonvolatile memory IC EEPROM on outdoor unit control PCB Operating and timer H11 lamp blinking simultaneously A EO Protective Overload current detected Compressor 2 constant speed device Pretoadcurentdeteced Compressor 2 constant speed H21 Lock current detected Compressor 2 constant speed H12 A lone e No current detected when Compressor 3 constant speed Discharge temp sensor trouble o Connection failure of oil detection sensor Fusing of electromagnetic contact Current detected when compressor was OFF CHECK z Automatic backup operation only blinking NO display changes lt lt gt gt alarm indication Does not affect the operation of other indoor units lt gt alarm indication In some cases may affect the operation of other indoor units 7 TI D D 2 o X e 5 D 3 a o E wm Q D 7 ae 3 D o D 5 D fe S v v alala lea Ja lae ae la S S TI wo a 3 WAY SYSTEM 2 Outdoor Unit Control Panel LED Display Trouble Diagnosis O ON xt Blinking OFF LED RED Display meaning After the power is turned ON and automatic address setting is not in progress no communication with the indoor units in that system is possible After power is turned ON and automatic address setting is not in progress 1 or more indoor units are confirmed in that system however the number of indoor units doe
188. tion forces the oil out of the oil charge tank and oil is charged into the outdoor unit from the low pressure outlet port From time to time close the upper valve on the top of the oil charge tank only this valve and shake the tank to check the amount of remaining oil Lo o jo 4 p High pressure outlet port For 7 94mm dia connector e Low pressure outlet port For 7 94mm dia connector Manifold gauge Lo Hi Procedure 1 Open the Hi side E manifold gauge valve Lower valve Procedure 3 Open the lower valve Connect from here to Suction tube service port i refrigerant recovery unit For 7 94mm dia connector Fig 16 To terminate the oil charging work do as follows To end the charge process first close the valve on the high pressure side of the manifold gauge Then wait several tens of seconds after the pressure display on the manifold gauge low pressure gauge stabilizes in order to equalize the pressure with the low pressure outlet port and to vaporize the refrigerant in the charge tank Then perform steps 1 and 3 in sequence and fully close the valves Finally connect th
189. tion to ordinary heating and cooling operation this system also includes the following 3 types of special controls for control of the system as a whole 1 Tube refrigerant recovery control 2 System refrigerant oil recovery control 3 Defrost control 4 1 Tube Refrigerant Recovery Control This control recovers refrigerant from the tubing when the microcomputer is initialized immediately after power ON after warning output occurs and after a set amount of time has elapsed standard 60 minutes when all outdoor units are stopped This control is intended to recover refrigerant if refrigerant has accumulated somewhere in the tubing when the units have been stopped for long periods as well as to compensate for tubing thermal loss during heating start and is also used for oil recovery 1 Control when the outdoor unit heat exchanger is acting as a condenser when all units are in Cooling mode or at start of mixed operation when the cooling load is high Control time 60 seconds Outdoor units All outdoor units operate at maximum horsepower Electronic control valve Valves at all indoor units operate at a fixed pulse according to the indoor unit capacity Indoor RAP valve kit Valve kits at all indoor units operate in Cooling mode ON status units Fan Fan operates at the set fan speed stops or operates at L speed depending on the indoor unit operation mode When the above operation is finished normal operation starts at the h
190. tion when a common use solenoid valve kit is used and there are more than one 1 indoor unit in the heating mode within the same solenoid valve kit 1 14 f 3 WAY SYSTEM 4 Special Controls Control Functions 4 3 7 Defrost end judgment conditions Defrost ends when either of the below defrost end judgment conditions is met Condition 1 The temperatures are 6 C or higher at all temperatures sensors installed on the outdoor unit heat exchangers However if there is any other outdoor unit where the defrost end condition has not been met defrost control continues for all outdoor units and system defrost control is not ended Condition 2 The maximum defrost time listed in the table above has elapsed 4 3 8 System defrost end When all outdoor units where defrost control is in effect have met the defrost end conditions defrost control is ended for the system 1 15 3 WAY SYSTEM 5 Other Controls Control Functions 5 1 Oil Control 5 1 1 Oil level Meaning Sete ai is more than an adequate amount of oil in See ca is the normal operating state of the compressor the system and not a problem Slightly low The compressor may contain an adequate Check that oil control recovers oil a amount of oil but it may also contain less than AA an adequate amount of oil Extremely low There is not enough oil in the compressor Check that system oil recovery O id a pre The compressor contains enough oil when the oil level is in the
191. to the frequencies Ordinarily for reasons of efficiency the upper limit for operation is approximately 50 Hz If greater capacity is required the next compressor is started When all compressors are operating and greater capacity is required the inverter compressors are operated at frequencies above approximately 50 Hz This control may increase the lifetimes of the inverter compressors and refrigerant oil If the number of connected outdoor units is small the number of inverter compressors is also small Therefore the compressors may operate at a high frequency even when the load is not large 2 Sequential operation beginning from unit No 1 By using the outdoor unit maintenance remote controller to change the outdoor unit EEPROM settings it is possible to start the units in sequence beginning from unit No 1 For information concerning EEPROM settings refer to the field application functions 3 WAY SYSTEM 3 Compressor Control Control Functions 3 3 Compressor Capacity Control The compressor operating conditions vary depending on the indoor unit operating conditions and on the effects of indoor heat load outside temperature and other factors Unit No 1 CCU calculates the required capacity according to these operating conditions and allocates the capacity requirement among the outdoor units according to the compressor start stop rules Fine adjustments to system capacity control are made by the inverter compressors Dependin
192. trol valve is much higher open by operation 300 pulses or more than it was at start and the difference Pressure sensor temp E3 at that indoor unit is large 25 C or more These are only guidelines therefore the judgment may vary depending on the installation conditions load characteristics and other elements 3 WAY SYSTEM Outdoor Unit Repair Procedures 2 OUTDOOR UNIT REPAIR PROCEDURES da REMOVING PANCITA AA AAA eee 2 2 2 Removing Electrical Component Box and Duct oooooccoocnoooo 2 3 3 Discharging Compressor Oil ocoocooocccnnnn eee 2 5 4 Backup Operation cis ccdeaecdieie OL eee ek wd wale ee Eee te eee ba oh 2 6 5 Recovering Refrigerant caco ile ee Ba ee ee ee a 2 9 6 Checking for Leakage After Repair 000 cece eee eee eee 2 14 7 Evac ating SYSTEM atra As 2 15 8 Charging Compressor Oil 4 60 ici a 2 16 9 Pumping Out Refrigerant from Outdoor Unit oooooccocnnoomommo 2 20 10 COMpreSSor ui ir a Ee eee awe Ta Ree 2 23 11 High and Low Pressure SensorS oooooccconcccorn nunnur 2 38 12 Replacing 4 way valve ic iocoraicra a a ie 2 39 A 3 WAY SYSTEM 1 Removing Panels Outdoor Unit Repair Procedures Procedures 1 Removing Panels Removing Electrical Component Box and Duct Discharging Compressor Oil Backup Operation Recovering Refrigerant Checking for Leakage After Repair Evacuating System ON OaKR OD Charging Compressor Oil 9 Pumping O
193. ts The setting data is displayed in 8 digits The display changes between the first 4 digits Fig and the last 4 digits Fig When the first 4 digits are displayed the bottom dot of the colon is lit To exit the setting mode press the CHECK button 388 280 En and are displayed alternately Example shows display of 0000 0001 Pamesa 0 Sensor input not present Control is performed 1 Sensor input present Control is performed 2 Sensor input not present Control is not performed 3 Sensor input present Control is not performed A y 0 Disabled 1 Quiet mode 1 Outdoor unit fan Quiet 2 Quiet mode 2 3 Quiet mode 3 mode 4 Quiet mode 4 0 None 1 Discharge temp control only Mode 3 2 Demand only Mode 2 3 Discharge temp control Demand Mode 1 Snowfall sensor usage 0 0 1 40 4 70 7 100 8 120 9 140 10 160 11 200 12 1 no limit 0 0 1 40 4 70 7 100 8 120 9 140 10 160 11 200 12 1 no limit 0 Disabled 6 High static pressure mode Charge when the external static pressure is increased to over 30 Pa Demand 2 current High static pressure mode 3 WAY SYSTEM 6 Mode Settings Outdoor Unit Maintenance Remote Controller E Setting mode 2 lt Operating procedure gt O Press and hold the CHECK button button and button simultaneously fo
194. uctions in the corresponding items to correct the trouble Recovery After repairing the malfunctioning locations reset the power for the system all outdoor units Caution Automatic backup mode will not be canceled until the power is reset Notes Automatic backup mode is not engaged in cases of alarms other than those listed above Reasons There is no need for automatic backup if recovery is possible by correcting the remote controller input e With alarms for which automatic recovery is possible such as sensor alarms the presence of electrical noise may result in a new alarm However it is believed that this occurs for a comparatively short time only In these cases a mode automatic backup mode that limits operation may be engaged e Control is not possible when a communications system alarm has occurred Automatic backup mode is not engaged in order to avoid causing secondary damage Dae f 3 WAY SYSTEM 5 Blinking Inspection Display Trouble Diagnosis Blinking inspection display 2 compressor magnet SW seizing detection Alarm code Blinking inspection display Alarm meaning Compressor magnet SW seizing detected Status Although an outdoor unit exists where the outdoor unit fan is running no compressors in the system are operating Y Because the fan is running only at the outdoor unit where seizing was detected check the corresponding outdoor unit The fan may also run on its own when fan cracking prevention contro
195. um value within the range where capacity control is possible operation with inverter frequency of 25 Hz only Subsequently if C area continues the thermostat turns OFF 3 WAY SYSTEM 3 Compressor Control Control Functions 3 6 2 Condensation Temperature Tc Control Control when there are indoor units operating in Heating mode PX 55 5 C Thermostat OFF Area D PX 0 1 Horsepower decrease Area C 1 1 2 451 0 51 0 f Horsepower increase prohibited Area B gt 48 0 48 0 47 9 Horsepower increase Area AB 47 0 permitted 46 9 Horsepower increase Area A permitted Depending on the maximum requirement level of the indoor unit the judgment temperatures 0 15 30 for each area may vary as shown in the figure Maximum requirement level L example 1 For indoor units which are operating in Heating mode if one unit is selected for a test run the air intake temperature difference is ignored however Tc control is performed according to the figure above in order to prevent excessive load This is used for test run checks etc 2 Even within the same area the compressor capacity varies depending on the refrigerant temperature 3 Temperature PX is the coefficient value used to correct for any deviation with the high pressure or condensation temperature It may vary At the time of shipment it is 55 5 C 4 If the condensation temperature Tc enters area D and the thermostat turns OFF the next t
196. uring heating operation However this setting can be changed in order to increase the amount of humidifying Caution In order to avoid water leakage and damage to the fan do not use this setting unless a vaporizing humidifier is used ES Permit prohibit automatic This setting can be used to prevent the automatic heating cooling display on Humidifying when heater thermostat is OFF the remote control if the unit configuration permits automatic heating cooling heating cooling operation This setting allows a heat pump indoor unit to be operated as a cooling only Cooling only unit 3 WAY SYSTEM 2 Detailed Settings Function Remote Controller Functions memeo mem een Set when the indoor unit EEPROM memory is replaced during servicing Indoor unit capacity System outdoor unit address These are not set at the time of shipping from the factory Indoor unit address These must be set after installation if automatic address setting is not performed Group address Increase this value when it is difficult to turn the thermostat ON Automatic stop time after The time at which an indoor unit is automatically stopped after operation starts operation start can be set in increments of 5 minutes Cooling discharge Shifts the set value for models which perform discharge temperature control Discharge temperature control models Floor discharge wall built in direct expansion coil outdoor air treatment high fresh tem
197. ut Refrigerant from Outdoor Unit when repairing parts other than compressor 10 Compressor 11 High and Low Pressure Sensors 12 Replacing 4 way valve 1 Front panel removal Fig 1 e Remove the front panel remove 11 screws 2 Power outlet panel amp valve cover removal Fig 2 Remove the power outlet panel remove 2 screws e Remove the valve cover remove 2 screws Power outlet panel Valve cover Fig 2 3 WAY SYSTEM 2 Removing Electrical Component Box and Duct Outdoor Unit Repair Procedures Be sure to turn off the power before removing the electrical component box Then check that the power LED D53 on the control PCB of the outdoor unit is not lit 1 Remove the electrical component box cover remove 6 screws Fig 3 Electrical component 2 Remove power and control wires from terminals 3 Remove internal wires with extended connectors on the outdoor control PCB Solenoid valves thermistors crankcase heaters and others 4 Disconnect power lines connected to the secondary terminals of the magnetic contactor for the compressor Electrical 5 Remove the electrical component box component box remove 2 screws Fig 4 Fig 4 AN aa Be sure to release the locking mechanism before disconnecting each connector Remove the center duct Fig 5 X The center duct is fitted into the upper and lower ducts and held in place by the electri
198. ut when the tube with flare nut is removed Prepare to disconnect the 2 brazed locations shown in the figure Protect the sensors and the surrounding plates rubber lead wires clamps and other items Remove the discharge sensor shown in the figure 20 Disconnect the 2 brazed locations shown in the figure below 9 Pull the compressor toward you deformation of the tube with flare nut Ara When pulling the compressor toward you be careful not to cause any abnormal Remove the discharge sensor X O AN mit ana H YZ nS 7 Inverter compressor S Bolt SIN Majo Brazed locations 2 ll fii rH Washer 1 Tube with flare nut Rubber washer 1 WS ats A AS DIC TI Jona a si ED E al A Bolt Washer 1 Rubber washer 1 Beri a Ma 6 Es FR UN Bolt Washer 1 Rubber washer 1 Crankcase heater Front view Fig 20 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures Minstallation 4 2 3 4 S Remove the rubber stopper and tube cap brazed from the new compressor Install the crankcase heater onto the new compressor Place the 2 pieces of cushioning rubber in the designated positions on the compressor Place the 2 pieces of cushioning rubber onto the legs of the new compressor Ne When setting the compressor into
199. valve Approximately 4 5 seconds is a sufficient interval between closing each of the 2 valves 3 Press the ON OFF button on the outdoor unit maintenance remote controller to stop the operation of all units If the outdoor unit maintenance remote controller is not available use the following method to stop the operation of all units Pull out the SCT connector 2P YEL CN231 from the outdoor unit control PCB of the unit where pump down is being performed When the SCT connector is pulled out alarm F12 sensor trouble immediately occurs and all outdoor units stop operating Be sure that you do NOT grasp the lead wire when pulling out the connector Removing any other connector may not cause the units to stop Therefore be sure to pull out only the SCT connector 4 Connect a refrigerant recovery device to the liquid tube service port Schrader type valve of all outdoor units where dry cores will be attached then recover the refrigerant from the tubing Be sure that no air enters the tubing at this time When the hose is connected internal pressure is applied by the remaining AN refrigerant in the inter unit tubing The connection port employs a Schrader type valve To determine when refrigerant recovery is compete follow the instructions in the instruction manual of the refrigerant recovery device 5 As shown in Fig 19 disconnect the tube that runs from the liquid tube valve to the ball valve on all outdoor units where dr
200. ving entered the refrigerant circuit 4 Check that valve leakage at a stopped sub unit has not resulted in accumulation of refrigerant at that sub unit 5 Check that no refrigerant leakage has occurred 6 Check whether the wiring from the solenoid valve kit is actually connected to the different indoor unit or not 7 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Check whether installation of the common use solenoid valve kit from a PC has been made or not Confirmation from the address setting software of a PC 1 If there was a valve operation failure in general it is necessary to replace the valve 2 If a foreign object or moisture has entered the circuit install a strainer or dry core depending on the degree of the problem 3 If refrigerant has leaked into stopped sub units it is likely that valve leakage has occurred The valve must be replaced Example PT Notes 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H07 Alarm Alarm code H07 No oil alarm Alarm conditions This alarm occurs when oil does not flow for a specified amount of time in tubing where oil flow constantly The presence of oil is detected by a temperature sensor Judgment method Tcal calculated by the formula below from the oil temperature is compared with the discharge temperature If Tcal is higher than the discharge temper
201. ween the liquid narrow tube valves and the ball valves 15 At all outdoor units where dry cores were removed pressurize with 3 3 MPa of nitrogen from the liquid tube service port and check for leaks 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repair Procedures 16 After evacuating all nitrogen gas from the tubing apply vacuum to all outdoor units where dry cores were removed until the pressure is 101kPa 5 Torr or less 17 INSTALLATION Refer to the Information for the Person in Charge of Installation items Charge with an amount of refrigerant equal to the amount that was recovered B If a ball valve is not installed on the outdoor unit 1 Refer to Refrigerant recovery procedures 2 for indoor unit with no ball valve under 5 2 Refrigerant Recovery Procedures Indoor Unit Perform pump down of the refrigerant from all indoor units and inter unit tubing to the outdoor unit side 2 Cut the liquid narrow tube at all outdoor units where dry cores will be attached then attach the dry cores and ball valves as shown in Fig 19 3 For the next steps refer to 6 17 in A on the previous page Cleaning dry core Liquid tube service valve Outdoor unit Normal unit OL HL J Balance tube Dry core Bidirectional type for R410A Liquid tube Discharge tube Suction tube l Fig 19 3 WAY SYSTEM 10 Com pressor Outdoor Unit Repai
202. y cores will be attached Then attach the dry cores 6 At all outdoor units where dry cores are attached pressurize with 3 3 MPa of nitrogen from the liquid tube service port and check for leaks 7 After evacuating all nitrogen gas from the tubing apply vacuum from the liquid tube service port to all outdoor units where dry cores are attached until the pressure is 101kPa 5 Torr or less 8 Fully open the liquid tube valve and ball valve on all outdoor units where dry cores are attached 9 Operate all outdoor units for approximately 3 hours in either Heating or Cooling mode or mixed Cooling and Heating mode 10 Follow the above procedure and replace all dry cores with new dry cores 11 Operate all outdoor units for approximately 20 minutes in either Heating or Cooling mode or mixed Cooling and Heating mode 12 Follow the instructions in 3 Discharging Compressor Oil and drain a small amount of the oil from the oil separators of all outdoor units where dry cores are attached Check the color phase odor and other characteristics 13 If the results show that dry core cleaning is still necessary for example a color phase of 4 0 or higher return to Step 11 and repeat until the results are normal including a color phase of 3 5 or less AN Perform another dry core replacement after approximately 30 hours of system operation 14 Perform steps 1 4 and remove all dry cores Then connect the tubing bet
203. yed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or co replace the coil e MOV3 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN229 connector 6P BLK on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or co replace the coil e MOV4 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN230 connector 6P BLU on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 p

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