TECHNICAL & SERVICE MANUAL DC INVERTER - Termo
Contents
1. via 2 B 2 Ca 29 S18 DOE 99 Sv2 ES es FR E C D 8 g 13 Outdoor Unit GRF97R5I GRF127R5I 538 91 AIR INTAKE 12 NA hi x We Eg og z 20 gt 5 o a C Ts AIR DISCHARGE 2 dia 12 holes Wide tube service valve dia 9 52 3 8 Narrow tube service valve 720 72 dia 6 35 1 4 55 109 Unit mm 14 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Indoor Unit Indoor unit Outdoor unit l Outdoor Unit GRF127R5I Compressor Heat exchanger l PEN Nr Ge SR Wide tube Accumulator service dee zm Wide tube valve2. 6 Install the air intake grille a Allow the edge of the air intake grille to slide into the top of the indoor unit and then insert it all the way inside Fig 12a b Press the bottom right and left corners and center of the air intake grille to attach it to the indoor unit Fig 12b al Fig 12b 28 Fig 11b Groove AZ Pin 8 MAINTENANCE 8 1 Address Setting of the Remote Control Unit The address can be set in order to prevent interference between remote controllers when two indoor units are installed near each other The address is normally set to A To set a different address it is necessary to change the address on the second remote controller NOTE Once changed you cannot restore the original address setting of the air conditioner 1 Switch on the power source 2 Break the address setting tab marked A on the second remote controller to change the address Fig 13 When the tab is removed the adress is automatically set to B Fig 14 3 Press and hold the remote controller QUIET button and 1 HR TIMER button At the same time press the ACL reset button Use a thin object such as the tip of a pen to press the ACL button When this has been done oP 1 test run appears blinking in the remote controller clock display area 4 Each time the 1 HR TIMER button is pressed the disp
3. b gt Vv Area Automatic capacity control When Point A has been exceeded the operation frequency is reduced by a certain proportion Area Frequency increase is prohibited At Point B and below overload prevention is ended and control is the same as in the a area H Freeze prevention During COOL or DRY operation freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below 1 Freeze prevention operation is engaged when the temperature of the indoor heat exchanger is below 6 C 2 Restart after freeze prevention operation occurs when the temperature of the indoor heat exchanger reaches 8 C or above oo temperature D Indoor heat exchanger lt a gt b a Area Automatic capacity control b When the temperature drops below Point A the operation frequency is reduced by a certain proportion c Area Frequency increase is prohibited d When the temperature reaches Point C or above freezing prevention is ended and control is the same as in the a area When the temperature drops to below 2 C continuously for 2 minutes or longer the compressor stops Once the freeze condition is detected the air conditioner will work less than the maximum frequency until it is turned off 33 H Cold air prevention during heating During heating the fan speed is set to LL
4. eno reta el en Ns 42 12 3 Tools Specifically for R410A reren eate maet Santen dp e DUI cua dud 44 12 4 Tubing Installation Procedures anserina eee ce eee 44 12 5 In Case of Compressor Malfunction EE 45 12 6 In Case Refrigerant is Leaking ENNEN 47 12 7 Charging Additional Refrigerant use 48 12 8 Retro Fitting Existing Systems e p a Den AN A SNS 48 APPENDIX EP spac ded ars 49 1 OPERATING RANGE Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Cooling Maximum 32 C 23 C 43 C D B Minimum 19 C 14 C WB 19 C D B Heating Maximum Minimum 27 C D B 16 C D B 24 C 18 C WB D B 15 C W B 2 SPECIFICATIONS 2 1 Unit Specifications Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Power Source 220 to 240V Single Phase 50Hz Voltage Rating 230V Capacity kW 2 65 0 9 to 3 2 3 60 0 9 to 5 0 BTU h 9 000 3 100 to 10 900 12 300 3 100 to 17 100 Air Circulation High mih Moisture Removal High _ mers e o O Power Factor a 5 _ EER ml ZWN Airflow Direction Indoor Horizontal Vertical Operation Sound Indoor Hi Me Lo Qt dB A Quiet mode Outdoor Hi dB A 46 47 Refrigerant Narrow tube mm in Tube Diameter Wide tube mm in 9 52 3 8 Refrigerant Tube Kit Accessories Optional Air Clean Fi
5. Fig 3 Limit of Elevation Required Amount of Difference H Additional Refrigerant m g m MCAF94 124 7 5 15 7 15 If total tubing length becomes 7 5 to 15 m charge additional refrigerant R410A by 15 g m No additional charge of compressor oil is necessary 7 1 2 Outdoor Unit AVOID e heat sources exhaust fans etc Fig 4 e damp humid or uneven locations DO choose a place as cool as possible choose a place that is well ventilated e allow enough room around the unit for air intake exhaust and possible maintenance Fig 5a provide a solid base level concrete pad concrete block 10 X 40 cm beams or equal a minimum of 10 cm above ground level to reduce humidity and protect the unit against possible water damage and decreased service life Fig 5b e Install cushion rubber under unit s feet to reduce vibration and noise Fig 5c use lug bolts or equal to bolt down unit reducing vibration and noise Install in a location where no antenna of a television or radio exists within 3 meters 24 Exhaust fan Hot air z 2 7 Heat source Outdoor unit 1 Fig 4 Obstacle above i Air intake Min 5 cm Valve 1 amp Min c 2 2m m 2 4 i Ed o Min Air discharge Min 9 5 cm Y 20 cm Lm 9 Fig 5 Ground Anchor bolts E 4 pcs 22222222 10 Air intak
6. HOLON ma T T HOLON HOSSIUJNOI TANNED 7 N 13A TJANH 109 no HOLSIINH3HL Sie nis M A poa LHM dt LHM na HOLON NY4 EE Nag ee E LHM dS fefe D do AQ do cc EFE TO qe aS ox Wood czmz mz n m4 oc Na T3A NHO HOLON a 395 25 2 20 95 HOLSINHAHL E SE 5e 2 HITIOHLNO9 ae 9 3 HOLON dV m J0 2 2 5 Q ER m m z Emm E z H LHM d 2 Are A r 5 gt LHM d6 dv o 5 j 2 HOOALNO lt aviay 9 LHM 9 Is D d HS DO HLHVa om om ox TANNYD 4 _ 2 ma JS ma T ST od asva EE Nua n IT wua x3 Lee 8 H v H 2 9 F mT Dun LHM t Re 4 Aug x HOLVHOdVAJ o gt ae eae 109 OLLANDVW SONV LOWSY K 3SV8 TYNINHAL 22 ISHZ ELAYD luf JOOPINO VVISH CIAVON HUN JOOPUI 7 INSTALLATION INSTRUCTIONS 7 1 Installation Site Selection 7 1 1 Indoor Unit To prevent abnormal heat generation and the possibility of fire do not place obstacles enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow AVOID e direct sunlight e nearby heat sources that may affect performance of the u
7. CO Des H s 4 way OD Muffler j valve 9 52mm t Tu Li i aS F 1 1 D 1 5 g x i g 1 i 1 I i Capillary tube for N Electric split flow t expansion Se valve Narrow tube valve M i gt om Gm O D Strainer 6 35 mm GENEE a 1 4 KE m ra SS MCAF124R5IAA Indoor unit Outdoor unit nog Sg E ENS SE S Wide tube Accumulator service Z Wide tube valve 2 i frs simos ue 4 way i OD Muffler 3 valve 9 52mm 3 8 C amp SEN 1 ERKI 1 1 1 1 5 1 1 g 1 WK i g 1 1 1 X Modulator Capillary tube for Electric split flow ae expansion tube valve Narrow tube service valve 8 O D 6 35 mm Muffler Compressor 1 Heat exchanger 1 4 Cooling cycle Defrosting cycle Heating cycle Cooling cycle Defrosting cycle Heating cycle 5 PERFORMANCE DATA 5 1 Temperature Charts Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I H Cooling Characteristics 29 SE 12 S 12 2 95 2 2 nao Sa L Leo B 2 11 2 EI TC 3 9 1 0 102 N 09 9 2 25
8. Set temp HEAT As shown by the example in the figure below with AUTO cooling heating operation the mode changes between Heating and Cooling mode according to changes in the relationship between the current room temperature and the set temperature Example Example of operation in AUTO mode with the set room temperature at 23 C Room temp Zone A Zone B Zone C Zone C Set temp Zone B Zone A Compressor Operation mode 31 H SENSOR DRY During DRY operation the system adjusts the room temperature and fan speed according to the conditions in the room in order to maintain a comfortable room environment SENSOR DRY operation DRY operation is as shown in the figure below Load COOL zone A zone B zone Conditions are monitored at all times when the room temperature is below 15 C DRY A The compressor operation frequency varies The indoor fan operates with 1 f fluctuation The compressor operates at a low operating frequency The indoor fan operates with 1 f fluctuation Monitoring operation takes place when the room temperature is below 15 C or more than 3 C below the set temperature When the monitoring range is entered the compressor stops and the indoor fan operates with 1 f fluctuation B PAM o control n order to further improve inverter performance control is Switched between PWM control at l
9. e The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state in liquid phase When refrigerant R410A is used the composition will differ depending on whether it is in gaseous or liquid phase and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state Thus always charge the refrigerant while it is in liquid phase Ether type oil is used for compressor oil for R410A type units which is different from the mineral oil used for R22 Thus more attention to moisture prevention and faster replacement work compared with conventional models are required 12 2 Checklist before Servicing Use a clutch type flare tool for R410A or the conventional flare tool Note that sizes of the resultant flares differ between these two tools Where a conventional flare tool is used make sure to observe A Specification amount of extrusion by using the flare spacer Specification A Flare tool for R410A Conventional flare tool for R22 Diam
10. 30 35 40 Outdoor inlet air D B temp CC Operating current A 25 30 35 40 Outdoor inlet air temp C 17 o 16 NS S 45 vu a 21 2 14 E yO Q 13 2 9 12 TD 3 tn E 10 25 30 35 40 NOTE Outdoor inlet air D B temp C B Heating Characteristics MPaG kgf cm G High pressure at wide tube service valve 5 0 5 10 15 20 25 Outdoor inlet air temp C 9 8 7 5 2 indoor Air Temp 23 D 20 E 5 5 47 C a 4 o 3 2 5 0 5 10 15 20 25 Outdoor inlet air 60 o 55 2 bei 5 50 wc remp 2 indoor yc 2 45 2 AT C g 4 9 35 S V 25 5 0 5 10 15 20 25 Outdoor inlet air Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely
11. DC motor connector pin arrangement Pin 1 Vs white Pin 2 Not used Pin 3 Not used Pin 4 Gnd black Pin 5 Vcc red Pin 6 FG blue Pin 7 Vsp yellow Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the outdoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller Trouble symptom 4 Fan motor rotation speed does not change during outdoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during outdoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble Therefore first replace the outdoor unit controller then if necessary replace the DC motor 38 10 5 Noise Malfunction and Electromagnetic Interference An inverter A C operates using pulse signal control and high frequencies Therefore it is susceptible to the effects of external noise and is likely to cause electromagnetic interference with nearby wireless devices A noise filter is installed for ordinary use preventing these problems However depending on the installation conditions these effects may still occur Please pay attention to the points listed below 1 Noise malfunction This refers to the application of high frequency noise to the signal wires resulting in abnormal signal pulses and malfunct
12. HOSS3HdlWOO ANWA AVM NVA pe i282 do do EE i205 qo TC ox o lt mr MA darc on 2 20 gt ze EQ 2 25 ITH d m m epe 2 2 9 9 w lt lt wo 2 ww D sw 2 comm EC cias TE RACE FRA ee 12 D HOOALNO LHA H3TIOHINOO NI UO 1nO 1 I HOLIOVdVO ASSY dg foo Sf SERGE LHM d6 IS HS DO P LHM as 1 ANS HOLI9vdv9 YOLOW T d TJA NH 1109 HOLSINHAHL a ouobna FP Hor pod NA pc I09 NOOH Nua ANd 218 HOLON Nv4 HOLSINHAHL HOLON H on H14V3 A 0m mat TJA NH D 3 Sal E d m 4 3sva Em 5 IT TVNIAHAL lt 5 3 e T fe THA NHO 4 13A NHO d P ii DH a AHD MM Lg ka ER DN EE wee HOLVHOdWAS 109 OLLANOVN 3ONvIOVdH K ASVa WNINYSL IGHZ6 JHD JOOPINO VVISH 61VON HUN JOOPUI 21 ng servicing 0 00181 0S2cS c V 38 0 00997 7S28 c V38 To avoid electrical shock hazard be sure to disconnect power before check and or cleaning any electrical parts MCAF124R5IAA Outdoor Unit GRF127R5I Indoor Unit
13. INSTRUCTIONS 7 1 Installation Site Selection sssseeeeeeennnnn mmn nennen 7 2 Recommended Wire Length and Diameter AAA 7 3 Remote Control Unit Installation Position iii 7 4 How to Test Run the Air Conditioner 7 5 Remove the Grille to Install the Indoor Unit ss MAINTENANCE 8 1 Address Setting of the Remote Control Unit issu 8 2 Disconnecting and Connecting Positive Connector for Outdoor Unit FUNCTIONS Sot Operation FUNCIONS uds du MO DRE Da eae URN E ais Saint 9 2 Protective FUnctloris iie Eo shaves cod dei est bd dec daar var cede re Deae ve dee eeens beden Page 10 TROUBLESHOOTING 10 1 Precautions before Performing Inspection or Repair 35 10 2 Method of Self Diagnostics sis 35 10 3 Checking the Indoor and Outdoor Units ss 37 19 4 Trouble Diagnosis of Fan Motor usate ekeren ann emiten E Pa hoses 38 10 5 Noise Malfunction and Electromagnetic Interference 39 11 CHECKING ELECTRICAL COMPONENTS 11 1 Measurement of Insulation Resistance 40 11 2 Checking Continuity of Fuse on PCB AsS y AAA 41 12 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 12 1 Characteristics of New Refrigerant R410A 42 12 2 Checklist before Servicing auo iino bete te tete
14. detection and release H CT Peak current cut off control e Reverse Cycle Defrosting This function prevents the circuit breaker or fuse from operating to open the circuit This function works when electrical current has increased due to an increase in the cooling heating load z or to a decrease in the power supply voltage In these cases operation frequency is reduced or operation is interrupted auto matically to control the electrical current for operation g When the cause of the increase in electrical current is rectified z the system will resume operation in the original mode Heating operation A e Outdoor fan ON 4 way valve ON Heating Peak current cut off trips Hz down 8 5 Frost sensing Niers Electrical current setting for COOL operation is Defrost detection occurs in either of the following cases used during DEFROST operation The temperature of the heat exchanger remains at or below the L1 line for 3 minutes after the start of HEAT operation The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation Outdoor heat exchanger temp B Ambient temp Frosting area Reverse cycle defrosting operation Compressor 1 minute after it is stopped compressor is ON Outdoor fan OFF e Indoor fan OFF 4 way valve OFF Operation lamp Repeatedly switches between red and orange illumination Releasing of
15. high in heating mode Refer to 9 2 Overload prevention during heating Points of rating condition Black dots in above charts indicate the following rating conditions Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 W B Heating Indoor air temperature 20 C D B Outdoor air temperature 7 C D B 6 C W B 16 Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5I H Cooling Characteristics 1 2 9 Ro Outdoor fan speed 50 122 gt E Low High 8 SE 1 1 BN 9 11 2 l C s Tem 22 22 A ot PX p w i TO 10 2 w 10 2 d g 200 5 1 T a 8 5 0 9 9 2 1 1 2 1 1 25 30 35 40 Outdoor inlet air temp C 9 Outdoor fan speed 8 Low High ou NEN 350 5 6 N o 409 D D 5 2 1 o Q 3 CTT 2 25 30 35 40 Outdoor inlet air temp C 20 Outdoor fan speed 18 Low Hon i 5 16 Sg Ss E L indoor Air 3 14 Se 27 C 5 12 T 24 C 5 1 H 5 l lt B e 9 6 ME 25 30 35 40 NOTE Outdoor inlet air D B temp CC H Heating Characteristics s llli 84 7
16. picking up and moving the indoor and 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 In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors 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 When Connecting Refrigerant Tubing 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 Check carefully for leaks before starting the test run When Servicing Turn the power off at the main power box mains before opening the unit to check or repair electri
17. recovery unit Tools specifically for R410A Vacuum pump with anti reverse flow 1 Solenoid valve installed type which prevents oil from flowing back into the unit when the power is off is recommended Vacuum pump 2 can be used if the following adapter is attached e Vacuum pump adapter reverse flow prevention adapter 3 Solenoid valve installed adapter attached to a conventional vacuum pump Electronic scale for charging refrigerant Flare tool Bender Tools which can be com Torque wrench monly used for R22 R407C and R410A Cutter reamer Welding tool nitrogen gas cylinder Ars e The above tools specifically for R410A must not be used for R22 and R407C Doing so will cause malfunction of the unit e For the above vacuum pump 1 2 and vacuum pump adapter 3 those for R22 type units can be used for R410A type However they must be used exclusively for R410A and never alternately with R22 and R407C e To prevent other refrigerants R22 R407C from being mistakenly charged to this unit shape and external diameter of the service port screw has been altered External diameter of service port R410A 7 94 mm 5 16 R22 R407C 6 35 mm 1 4 12 4 Tubing Installation Procedures When the tubes are connected always apply HAB oil on the flare portions to improve the sealing of tubing The following is the HAB oil generally used Esso ZERICE S32 nier For details on tubing installation procedu
18. resin connector cover and pull the connector off You cannot disconnect the connector by pulling the wire since it is locked inside Always hold the cover to disconnect See illustration at left For the connector without the resin cover push the lock in the direction of 2 while pulling it off How to Connect In order to connect hold the resin cover of the connector and push it in Confirm the click sound for the inside lock 30 9 FUNCTIONS 9 1 Operation Functions B Emergency operation Emergency operation is available when the remote controller malfunctions has been lost or otherwise cannot be used To operate the system press the OPERATION button which is also used as the receiver below the unit display Each time this button is pressed the OPERATION lamp changes color to indicate the type of operation Select the desired type of operation COOL GREEN HEAT RED STOP Lamp Off The set temperature is 2 C below the detected room temperature in the case of cooling operation and 2 C above the room temperature in the case of heating operation The flap and fan speed settings are AUTO H AUTO cooling heating operation Selecting the operation mode When AUTO mode is selected the microprocessor calculates the difference between the set temperature and the room temperature and automatically switches to Cooling or Heating mode Room temp gt Set temp COOL Room temp
19. self diagnostics is completed be sure to press the ACL reset button to return to normal mode The air conditioner will not operate if this is not done 35 button QUIET QUIET O edd Clock display S i Test run mode gt Y g lt A Self diagnostic mode i t 1 Address setting mode Y OOOO AIR CONDITIONER ____ E GE CN C US ei E niu Li Li al D ON 1 0FF O ON OFF operation L i OSI 1HR TIMER button MODE C FAN SPEED NIGHT SETBACK C C J FLAP HIGH POWER C ACL Reset button 1 Self diagnostics Lamps INDOOR UNIT OPERATION TIMER UIET Been 1 OPERATION lamp 2 TIMER lamp OPERATION TTT 3 QUIET lamp OPERATION button REMOTE CONTROL receiver e Since the indications cover various units the corresponding parts listed below may not be present in some models Indication on indoor unit OFF Blinking IC ON Illuminated wo N Operation 1 Diagnostics item Diagnostics contents Room temperature sensor failure Indoor heat exchanger sensor failure Humidity sensor failure Compressor temperature sensor failure Outdoor heat exchanger sensor failure Outdoor air temperature sensor fai
20. the Indoor Unit Basically these models can be installed and wired without removing the grille If access to any internal part is needed follow the steps as given below CAUTION Be sure to wear work gloves during installation to avoid being cut by the sharp aluminum fins of the heat exchanger How to remove the grille 1 Grasp both ends of the air intake grille and remove it by opening towards the front and pulling towards you Fig 9a 2 Remove the 2 screws Fig 9b 3 Remove the screw on the right side cover plate and open the cover Fig 10a 4 Take out the thermistor from the grille Fig 10b 5 Pull the lower part of the grille toward you to remove Fig 11a 6 Use a standard screwdriver to push on the tabs to remove the grille How to replace the grille 1 Reinstall the grille into the lower part while aligning its tabs on the upper part Fig 11b Insert the tabs in the slots and push the lower part of the grille back into position 2 Make sure that the grille and frame are firmly fitted together by engaging the tabs 3 Attach the thermistor on the grille Fig 10a 4 Close the cover and replace the screw Fig 10a 5 Affix the grille with the 2 previously removed screws Fig 9b Air intake grille Grille Screw cover BO ik DE Cover Thermistor
21. very low or stopped As the temperature of the indoor heat exchanger rises the fan speed is changed to the set speed Set fan speed High At stability of operation At start of operation LL Stopped 25 Approx 40 gt Indoor heat exchanger temperature C The fan speed is forcibly changed to LL beginning 30 seconds after the thermostat turns OFF e At stability of operation refers to operation when the room temperature has approached the set temperature When HEAT operation starts the indoor fan is stopped until the temperature of the indoor heat exchanger reaches 20 C or higher or until the room temperature reaches 15 C or higher B Compressor discharge temperature control This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature Compressor discharge temperature C Approx A 101 Approx 94 k Area Automatic capacity control When the temperature rises above Point A the operation frequency is reduced at a specified rate Area Further frequency increase is prohibited d When the temperature falls below Point B prevention of a rise in frequency is released and the air conditioner operates as in a area The compressor will stop if the temperature of the compressor discharge exceeds 120 C due to shortage of gas or other reason H Defrost
22. wax for R410A e Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen N2 in the refrigerant circuit of the unit Leave ends of tubes open during welding 4 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 5 Evacuation e Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back e The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly e When using a vacuum pump with exhaust air volume more than 25L min and ultimate vacuum pressure rate of 0 05Torr Standard time for evacuation Length of tubing Less than 10 meters 1 Detect leaks OK 2 Recover refrigerant OK 3 Weld leaking points OK 4 Check for sealing OK 5 Evacuation OK 6 Recharge More than 10 meters Evacuation time More than 10 minutes 6 Recharging e Recharge unit in the same manner explained on the previous page 5 Recharging 47 More than 15 minutes 12 7 Charging Additional Refrigerant 12 7 1 When Tubes are Extended e Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit Charge additional refriger
23. 27R5I Indoor heat exchanger sensor Model PTM D51H S3 2 TH1 Indoor air temp sensor Compressor temp sensor Model PTM D51H S3 2 TH2 Model 1FA4V2E025900 10 200 9 180 8 160 X 7 2 9 140 w goe 120 2 e g 9 2 100 D A E 80 IE 2 40 20 10 15 20 25 30 35 40 0 O 10 20 30 40 50 60 70 80 90 Temperature C Temperature C Outdoor air temp sensor Model TKS269B Outdoor heat exchanger sensor Model 1FA4V2E025900 40 35 30 25 20 Resistance k ohm 20 15 10 5 0 5 10 15 20 Temperature C 12 3 DIMENSIONAL DATA MCAF94R5IAA Indoor Unit MCAF124R5IAA o C o o 4 J o o o o 0 A o o o 9 ges ze o o cof o o ana D sp Osy 99 o Qo o S c6 Del o R Oy y R La La 981 09 9281 Sze TE ET 0 98 9 eqni En 8 es 6 eip eqni PIM 681 6841 D ii D 681
24. 4 Continuous overload operation 5 Outdoor fan does not rotate 6 Outdoor circuit board failure Indoor fan operating failure 1 Fan motor failure 2 Contact failure at connector 3 Indoor circuit board failure 4 way valve switching failure Indoor zero cross failure 1 4 way valve failure heat pump model only 2 Outdoor circuit board failure No refrigerant protection 1 Service valve not opened 2 Shortage of refrigerant DC compressor drive circuit failure 1 Open phase 2 Outdoor circuit board failure Outdoor fan operating failure 1 Fan motor failure 2 Contact failure at connector 3 Outdoor circuit board failure Outdoor system communications failure Outdoor high pressure SW OLR operation Outdoor power supply open phase Outdoor coil freezing 1 Mis wiring 2 Blown fuse 3 Power relay failure 4 Open phase 5 Outdoor circuit board failure 6 Compressor failure x x x 1k x x x n iSi ioi ii ii ur lo SE GE LEE et LE CE DC DIEKE LE Ge et X e dE D pw DELE NECK DEO XE X XE OX OX Set Freeze prevention operation activated 36 1 Indoor fan system failure 2 Shortage of refrigerant 3 Low temperature operation 2 If the self diagnostics function fails to operate e No indicators illuminate and the Check the indoor unit indoor fan does not rotate Check the power voltage Blown Is the fuse blow
25. COOL and DRY modes When the night setback mode is selected the air conditioner automatically raises the temperature setting 1 C when 30 minutes have passed after the selection was made and then another 1 C after another 30 minutes have passed regardless of the indoor temperature when night setback was selected This enables you to save energy without sacrificing comfort This function is convenient when gentle cooling is needed 1 C 2 F Setting temperature 4 Press the NIGHT SETBACK button 1 C 2 F 30 min 30min Time HEAT mode When the night setback mode is selected the air conditioner automatically lowers the temperature setting 2 C when 30 minutes have passed after the selection was made and then another 2 C after another 30 minutes have passed regardless of the indoor temperature when night setback was selected This enables you to save energy without sacrificing comfort This function is convenient when gentle heating is needed Setting fe C 4 F temperature Fa 4 S gt Press the NIGHT 30 min 30 min SETBACK button Time 9 2 Protective Functions During HEAT operation the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated Indoor heat exchanger A Control start B Control end Indoor heat exchanger temperature C
26. Ki d NOT 2 9 29 6 MPaG kgf cm G 24 24 5 1 9 19 4 b 0 5 10 15 20 25 Outdoor inlet air temp CC High pressure at wide tube service valve 9 8 T 7 4C 5 indoor air Temp 2 6 200 2 2 47 C D 5 8 4 o 3 2 5 0 5 10 15 20 25 Outdoor inlet air D B temp C Indoor discharge air temperature C 5 0 5 10 15 20 25 Outdoor inlet air temp C Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode Refer to 9 2 Overload prevention during heating Points of rating condition Black dots in above charts indicate the following rating conditions Cooling Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B 24 C W B Heating Indoor air temperature 20 C D B Outdoor air temperature 7 C D B 6 C W B 17 5 2 Air Throw Distance Charts Indoor Unit MCAF94R5IAA Room air temp 27 Fan spee
27. PERATION lamp TIMER lamp QUIET lamp OPERATION pnm REMOTE CONTROL receiver OPERATION button INDOOR UNIT 49 ll Me Technibel R D 28 Reyrieux BP 131 01601 Tr voux CEDEX France URSS 4 74 00 42 AF cL aten Tel 33 04 74 00 92 92 Fax 33 0 00 42 00 http www technibel com
28. R TIMER button e Release the QUIET button QUIET button 2 Start Cooling mode test run by pressing the ON OFF operation button of the remote controller Fig 8a This starts the fan producing uncooled forced air with the 3 indicator lamps OPERATION lamp TIMER lamp and QUIET lamp on the main unit blinking Fig 8c After 3 minutes the system shifts into cooling operation and cool air will start to be felt Cool mode test run is unaffected by the room temperature 3 Press the ON OFF operation button of the remote controller again to stop the test run Fig 8a 4 Finally press the ACL reset button of the remote controller to release it from Test Run mode to return to normal mode Fig 8a gs and oP 1 will disappear from the remote controller display area IMPORTANT After the test run is completed be sure to press the ACL reset button to return to normal mode The air conditioner will not operate correctly if this is not done D 27 SETTEMP amp LIL OD OI eos ON OFF O O QUIET MODE FAN SPEED NIGHT SETBACK C FLAP HIGH POWER TIMER OFF ON OFF operation button 1HR TIMER button ACL Reset OPERATION TIMER E QUIET OPERATION Fig 8c button OPERATION lamp TIMER lamp QUIET lamp 7 5 Remove the Grille to Install
29. TECHNICAL alt amp SERVICE MANUAL MT Technibel MCAF94R5IAA GRF97R5I MCAF124R5IAA GRF127R5I FILE NO Destination Europe DC INVERTER SPLIT SYSTEM AIR CONDITIONER Indoor Model No Product Code No Outdoor Model No Product Code No MCAF94R5IAA 3 871 300 03 1 852 345 22 GRF97R5I GRF97R5IAA 185234525 MCAF124R5IAA 387130004 1 852 345 23 GRF127R5I GRF127R5IAA 1 852 345 26 MCAF94R5IAA GRF97R5I MCAF124R5IAA GRF127R5I RoHS This product does not contain any hazardous substances prohibited by the RoHS Directive N WARNING You are requested to use RoHS compliant parts for maintenance or repair You are requested to use lead free solder EET QA These air conditioners employ new refrigerant R410A Pay special attention when servicing the unit REFERENCE NO SM700725 Important Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person it is 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 Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attentio
30. ach air conditioner unit must be grounded F Power supply e For the installation of a grounding device please Single phase 220 240 VAC 50Hz observe local electrical codes e Grounding is necessary especially for units using Fig 6 inverter circuits in order to release charged electricity and electrical noise caused by high tension Otherwise electrical shock may occur e Place a dedicated ground more than 2 meters away from other grounds and do not have it shared with other electric appliances e Be sure to connect the power supply line to the indoor unit as shown in the wiring diagram The outdoor unit draws its power from the indoor unit e Do not run wiring for antenna signal or power lines of television radio stereo telephone security system or intercom any closer than 1 meter from the power cable and wires between the indoor and outdoor units Electrical noise may affect the operation 25 7 3 Remote Control Unit Installation Position The remote control unit can be operated from either a non fixed position or a wall mounted position To ensure that the air conditioner operates correctly do not install the remote control unit in the following places In direct sunlight Behind a curtain or other place where it is covered More than 8 m away from the air conditioner In the path of the air conditioner s airstream Where it may become extremely hot or cold Where it may be subject to electrica
31. ance and the following procedure should be used to check the motor e Perform the trouble diagnosis by Test Run mode described on Installation Instructions Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the outdoor controller connector for 3 in the table below the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started For this reason to measure the voltage again first turn OFF the outdoor unit power then measure the voltage in Test Run mode Trouble symptom 1 The fan does not stop when the outdoor unit stops Outdoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the outdoor unit is operating Diagnostic procedure Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor unit controller 3 locations Measurement location Normal value 1 Vs Gnd Between pin 1 and pin 4 DC 230V or more 2 Vcc Gnd Between pin 5 and pin 4 DC 14V or more 3 Vsp Gnd Between pin 7 and pin 4 After fluctuating 4 times between DC 1 7 to 6 1V 1 sec ON and DC 0 V 1 sec OFF the DC motor trips Diagnostic results All of the above measured values are normal Fan motor trouble Replace the motor Any one of the above measured values is not normal Outdoor unit controller trouble Replace the controller Reference
32. ant in liquid state only Never charge additional refrigerant if refrigerant is leaking from the unit Follow instructions given in 12 6 In Case Refrigerant is Leaking and completely carry out repairs Only then should you recharge the refrigerant 12 8 Retro Fitting Existing Systems 12 8 1 Use of Existing Units e Never use new refrigerant R410A for existing units which use R22 This will cause the air conditioner to operate improperly and may result in a hazardous condition 12 8 2 Use of Existing Tubing f replacing an older unit that used refrigerant R22 with a R410A unit do not use its existing tubing Instead completely new tubing must be used 48 Remote Control Unit Sensor Transmitter AIR CONDITIONER QOH ORF Ge QUIET ES um HH OND gt OFFS AM TIL TAL pm EI DO DAAR Display ON I OFF O Cover closed QUIET QUIET button O o ON OFF operation button 1 HR TIMER button THR Temperature setting buttons MODE Selector button FAN SPEED selector button NIGHT SETBACK button FLAP button HIGH POWER button o TIME EN Advance button Advance button OFF TIME setting L setting button Return button Return button buttons CANCEL button CLOCK button SENSOR button Time display selector button ADDRESS switch ACL button Temperature display selector button Unit Display and Operation Button O
33. cal parts and wiring Keep your fingers and clothing away from any moving parts 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 Others 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 Confirm upon completing installation that no refrigerant gas is leaking If escaped gas comes in contact with a stove gas water heater electric room heater or other heat source it can produce dangerously toxic gas Table of Contents e OPERATING RANGE uice e OE SE Me pie ecu ee SPECIFICATIONS Zels Unit SpecifiCatlOniS irent eee eene e ape aves mr 2 2 Major Component Specifications sneren nennen edentate 2 3 Other Component Specifications sise SDBIMENSIONAL DATA eege ume aito pei mouet o ok een te REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow DIAEA oenen neen Reet b eter eet PERFORMANCE DATA 5 1 Temperature Charts ox een ace siete f asit Ee 5 2 Air Throw Distance Charts aaaaaanaanaaanaaaavasnananasnanannanannnnannannnnnnnnnanannnnnnannnnnnnnnanannnnnnannaa ELECTRICAL DATA 6 1 Electrical Characteristics naannaanaaanaaa naanana nnanunanunanunannnannnannnannnannnannnannnannnnnnnnnnnnnnnaa 6 2 Electric Wiring Diagrams 2 di o Roos eh EE INSTALLATION
34. d 2 The failure mode is stored in memory even when the power is not ON Follow the procedure below to perform diagnostics PROCEDURE After turning on power to the air conditioner use the remote controller and follow the steps below to execute self diagnostics Step 1 Press and hold the remote controller QUIET button and 1 HR TIMER button At the same time press the ACL reset button Use a pointed object such as the tip of a pen to press the ACL button When this has been done oP 1 test run appears blinking in the remote controller clock display area Step 2 Next press the 1 HR TIMER button once to change the display from oP 1 to oP 3 self diagnostics The display continues to blink Step 3 Finally press the ON OFF button to engage self diagnostics mode The self diagnostics function utilizes the 3 indicator lamps on the main unit in combinations of ON lamps blinking lamps and OFF lamps to report the existence of sensor trouble or a protective operation The lamps blink or remain ON for 5 seconds then turn OFF for 2 seconds Self diagnostics is completed when the buzzer sounds 3 short beeps A maximum of 3 self diagnostics reports are displayed for 5 seconds each beginning with the most recent report Following this display the lamps turn OFF In order to view the self diagnostics results again press the ON OFF button again The 3 lamps remain OFF if no trouble has occurred IMPORTANT After
35. d High Horizontal distance m 1 2 3 4 5 6 7 Axis air velocity m s Vertical distance m Flap angle 0 Axis air velocity 0 Flap angle 30 Axis air velocity 30 Room air temp 20 C Fan speed High Horizontal distance m Axis air velocity m s Vertical distance m Flap angle 45 Axis air velocity 45 Flap angle 60 Axis air velocity 60 18 Indoor Unit MCAF124R5IAA Room air temp 27 Fan speed High Horizontal distance m 1 2 3 4 5 6 7 8 Axis air velocity m s Vertical distance m Flap angle 0 Axis air velocity 0 Flap angle 30 Axis air velocity 30 Room air temp 20 C Fan speed High Horizontal distance m Axis air velocity m s Vertical distance m Flap angle 45 Axis air velocity 45 Flap angle 60 Axis air velocity 60 19 6 ELECTRICAL DATA 6 1 Electrical Characteristics Indoor Unit MCAF94R5IAA Outdoor Unit GRF97R5I Cooling Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating conditions Running amp 0 17 3 69 Power input 33 722 Rating conditions Indoor air temperature 27 C D B 19 C W B Outd
36. defrosting Outdoor heating exchanger temp is over 20 C Defrosting operation lasts 12 minutes maximum 2 minutes after it is stopped compressor is ON 4 way valve is ON Outdoor fan is ON NOTE If the air conditioner is turned off during the defrosting cycle it will continue defrosting and turn itself off after defrosting is completed 34 10 TROUBLESHOOTING 10 1 Precautions before Performing Inspection or Repair After checking the self diagnostics monitor turn the power OFF before starting inspection or repair High capacity electrolytic capacitors are used inside the outdoor unit controller inverter They retain an electrical charge charging voltage DC 310V even after the power is turned OFF and some time is required for the charge to dissipate Be careful not to touch any electrified parts before the controller LED red turns OFF If the outdoor controller is normal approximately 30 seconds will be required for the charge to dissipate However allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller 10 2 Method of Self Diagnostics Follow the procedure below to perform detailed trouble diagnostics 1 If the operation lamp blinks every 0 5 seconds immediately when the power is turned ON there is an external ROM OTP data failure on the indoor circuit board or a ROM socket insertion problem or the ROM has not been installe
37. e 22222 2222 or equal lt S gt BN En m 40 Coy pout lap SCC Fig 5b N NINNI WW NN A Wi NN Mi WW ZS A H WWW WWW AM N IN NI ANI WW WW WW N Cushion rubber Fig 5c 7 2 Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality For field wiring requirements please refer to your local electrical codes Carefully observe these regulations when carrying out the installation Table 2 lists recommended wire lengths and diameters for power supply systems Refer to the wiring system diagram Fig 6 for the meaning of A B and C in Table 2 Table 2 Cross Sectional A B A Power Supply Wiring Length m C Control Area mm B Power Line Length m Line Length m 3 5 GRF97 GRF127 Fuse or Circuit Breaker Capacity N es WIRING SYSTEM DIAGRAM e Be sure to comply with local codes on running the INDOOR UNIT OUTDOOR UNIT wire from the indoor unit to the outdoor unit size of TERMINAL B TERMINAL wire and wiring method etc O 1 Each wire must be firmly connected 2 e No wire should be allowed to touch refrigerant tubing T mie une SS the compressor or any moving part e te 4 L AX CP A e To avoid the risk of electrical shock e
38. eak current cut off control Compressor Discharge Temp Control Operation cut off control in abnormal ambient Temp Run Capacitor Micro F Grankcase Heater Propeller 1 0400 EC Nominal Output Coil Resistance WHT BRN 213 Ambient Temp 20 C RED PNK WHT 168 Safety Device Thermal fuse Operating Temp _ Open Run Capacitor Micro F VAC Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE 10 Outdoor Unit GRF127R5l Control PCB CB CRV123EH Control Circuit Fuse 250V 20A Compressor Single Rotary Hermetic Compressor Model Nominal Output G4CO90LU1ER 600W Compressor Oil Amount CC FV50S 320 Coil Resistance Ambient Temp 20 C U V 0 81 Safety Device CT Peak current cut off control Compressor Discharge Temp Control Operation cut off control in abnormal ambient Temp Run Capacitor Micro F Grankcase Heater Propeller 1 0400 50 Nominal Output Coil Resistance Ambient Temp 20 C Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor Micro F VAC Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE 11 2 3 Other Component Specifications Indoor Unit MCAF94R5IAA MCAF124R5IAA Outdoor Unit GRF97R5I GRF1
39. er to Electric Wiring Diagram If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin 40 Ground wire VAT es Probe Da Insulation tester Fig 1 Terminal plate ollellele ollella E Clip ES Insulation tube or tester metallic part O By Clip Copper tube or metallic part Insulation tester Fig 3 From fan motor compressor and other parts ee Metallic oy pan Eia a Clip d Insulation tester Fig 4 11 2 Checking Continuity of Fuse on PCB Ass y det e Remove the PCB Ass y from the electrical component box Then pull out the fuse from the PCB Ass y Fig 5 e Check for continuity using a multimeter as shown in PCB Ass y Fig 6 s Fig 5 c Fuse Fig 6 41 12 REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 12 1 Characteristics of New Refrigerant R410A 12 1 1 What is New Refrigerant R410A R410A is a new refrigerant that contains two types of pseudo non azeotropic refrigerant mixture Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 12 1 2 Components mixing proportions HFC32 50 HFC 125 50 12 1 3 Characteristics e Less toxic more chemically stable refrigerant
40. eter of tube D Dia 6 35 mm 1 4 Dia 9 52 mm 3 8 Dia 12 7 mm 1 2 Dia 15 88 mm 5 8 0 to 0 5 mm e Size of flare Spacer 77 s r D S ww A D D Flare tool for R410A Conventional flare tool R22 42 e Tubing precautions e Refrigerant R410A is more easily affected by dust or moisture compared with R22 thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation Never use 0 7mm thick copper tubing or tubing which is less than 0 8mm in thickness since air conditioners with R410A are subject to higher pressure than those using R22 and R407C e No addition of compressor oil for R410A No additional charge of compressor oil is permitted e No use of refrigerant other than R410A Never use a refrigerant other than R410A e If refrigerant R410A is exposed to fire Through welding etc toxic gas may be released when R410A refrigerant is exposed to fire Therefore be sure to provide ample ventilation during installation work e Caution in case of R410A leak Check for possible leak points with the special leak detector for R410A If a leak occurs inside the room immediately provide thorough ventilation 43 12 3 Tools Specifically for R410A e For servicing use the following tools for R410A Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant
41. ion Locations most susceptible to noise Trouble Correction 1 Locations near broadcast stations where there are strong electromagnetic waves 2 Locations near amateur radio short wave stations 3 Locations near electronic sewing machines and arc welding machines 2 Electromagnetic interference Either of the following trouble may occur 1 The unit may stop suddenly during operation 2 Indicator lamps may flicker The fundamental concept is to make the system less susceptible to noise Insulate for noise or distance from the noise source 1 Use shielded wires 2 Move unit away from the noise source This refers to noise generated by high speed switching of the microcomputer and compressor This noise radiates through space and returns to the electric wiring affecting any wireless devices televisions radios etc located nearby Locations most susceptible to noise Trouble Correction 1 A television or radio is located near the A C and A C wiring 2 The antenna cable for a television or radio is located close to the A C and A C wiring 3 Locations where television and radio signals are weak 1 Noise appears in the television picture or the picture is distorted 2 Static occurs in the radio sound 39 Select a separate power source Keep the A C and A C wiring at least 1 meter away from wireless devices and antenna cables Change the wireles
42. l or magnetic interference Where there is an obstacle between the remote control unit and the air conditioner since a check signal is sent from the remote control unit every 5 minutes 7 3 1 Mounting on a Wall Before mounting the remote control unit press the ON OFF operation button at the mounting location to make sure that the air conditioner operates from that location The indoor unit should make a beeping sound to indicate that it has received the signal Rear side 4 lt Remote control unit mount K ES 3 Mounting screws 4 x 16 included y Set in Hels 1 place To prevent loss of the remote control e A p unit you can connect the remote Ka control unit to the mount by passing a string through the remote control unit and attachment hole To take out the remote control unit pull it forward Fig 7 26 7 4 How to Test Run the Air Conditioner After turning on power to the air conditioner use the remote controller and follow the steps below to conduct the test run 1 Set the remote controller in Test Run mode Fig 8a a Press and hold the QUIET button b Then press and hold the 1HR TIMER button c At the same time press the ACL reset button once Use a pointed object such as the tip of a pen to press the ACL button e After a few seconds 88 appears and oP 1 blinks in the remote controller display area Fig 8b d Release the 1H
43. lay changes as shown below Press this button 2 times to change the display to oP 7 address setting Fig 15 I i or Test run mode el zt gt V 1 Self diagnostic mode QUIET s button d 1 Address setting mode V 5 oP 7 has now been selected for address setting 6 Press the ON OFF operation button on the remote controller Fig 15 Check that the beep signalreceived sound is heard from the second indoor unit approximately 5 times The sound you hear is the signal that the remote controller address has been changed 7 Finally press the remote controller ACL reset button to cancel the blinking oP 7 display Fig 15 Changing of the second remote controller address is now completed 29 AIR CONDITIONER M GEET Ho SET TEMP S DO LILI OFF ri PM ALU BA OB ON I OFF O e E m ACL button ON OFF operation button v H 1HR MODE FANSPEED NIGHT SETBACK FLAP HIGH POWER ON TIMER OFFS TIMER button ACL Reset button 8 2 Disconnecting and Connecting Positive Connector for Outdoor Unit L Pull the cover upward When the cover is pulled upward the lock is released with the sequence of 1 and 2 One of the two types of connectors illustrated at left is used Their basic structure is the same for each How to Disconnect Hold the
44. lter Dimensions amp Weight Unit Dimensions Package Dimensions Height Weight Net Shipping Shipping Volume m DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks Rating conditions are Cooling Indoor air temperature 27 D B 19 C W B Outdoor air temperature 35 C D B 24 C W B Heating Indoor air temperature 20 C D B Outdoor air temperature 7 C 6 C W B 6 Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5I Power Source 220 to 240V Single Phase 50Hz Voltage Rating 230V Capacity KW 3 50 0 9103 8 4 20 0 9 to 5 8 BTU h 11 900 3 100 to 13 000 14 300 3 100 to 19 800 Air Circulation High mh Moisture Removal Diet eme EER ml WAA Auto and 3 steps Auto Hi Me Lo Airflow Direction Indoor Horizontal Vertical Operation Sound Indoor Hi Me Lo Qt dB A Quiet mode Outdoor Hi dB A 47 49 Refrigerant Narrow tube mm in Tube Diameter Wide tube mm in 9 52 3 8 Refrigerant Tube Kit Accessories Optional Air Clean Filter Dimensions amp Weight Unit Dimensions Package Dimensions Height Weight Net Shipping Shipping Volume m DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks Rating conditions are Cooling Indoor air temperature 27 C 19 C W B Outdoor air temperature 35 C D B 24 C W B Heating Indoor air temperature 20 C D B Outdoor air temperature 7 C 6 C W B 7 2 2 Major Component Specifications 2 2 1 I
45. lure 1 Sensor open circuit or short circuit 2 Contact failure at connector or open circuit at terminal crimping location short circuit detection only for the humidity sensor 3 Indoor outdoor circuit board failure 1 Sensor open circuit or short circuit 2 Contact failure at connector or open circuit at terminal crimping location 3 Outdoor circuit board failure Outdoor electrical current detection failure Outdoor circuit board failure Indoor outdoor communications failure serial communications 1 Mis wiring 2 AC power failure 3 Blown fuse 4 Power relay failure 5 Indoor or outdoor circuit board failure HIC circuit failure Power Tr transistor circuit failure HIC or power Tr failure 2 Outdoor fan does not turn 3 Instantaneous power outage 4 Service valve not opened 5 Outdoor fan blocked 6 Continuous overload operation 7 Compressor failure 8 Outdoor circuit board failure Outdoor unit external ROM OTP data failure 1 External ROM data failure 2 Outdoor circuit board failure Peak current cut off 1 Instantaneous power outage 2 HIC or power transistor failure 3 Outdoor circuit board failure PAM circuit failure Active circuit failure 1 Outdoor circuit board failure 2 Outdoor power supply voltage failure Compressor discharge overheat prevention activated 1 Electric expansion valve failure 2 Capillaries choked 3 Shortage of refrigerant
46. n Replace the controller 10 3 Checking the Indoor and Outdoor Units 1 Checking the indoor unit Replace the circuit board or the fuse Control Check items unit operation Use the remote controller to operate the The rated voltage must be present between inter unit wirings 1 and 2 unit in TEST run mode To determine Connect a 5 k ohm resistor between inter unit wirings 2 and 3 When the whether the mode is currently in voltage at both ends is measured approximately 12 to 15V DC must TEST run mode check the 3 indicator be output and the multimeter pointer must bounce once every 8 lamps on the unit If all 3 are blinking seconds the current mode is TEST run Or instead of measuring the voltage you can insert an LED jig and check that the LED flickers once every 8 seconds If there are no problems with the above then check the outdoor unit For the Test run procedure refer to 7 4 How to Test Run the Air Conditioner 2 Checking the outdoor unit Control Check items unit operation Apply the rated voltage between outdoor The control panel LED red must illuminate unit terminals 1 and 2 Short circuit the outdoor unit COM terminal The compressor fan motor and 4 way valve must all turn on to the T RUN terminal If there are no problems with the above then check the indoor unit Using the TEST T RUN terminals TEST T RUN terminals T RUN Test ru
47. n compressor and fan motor turn ON TEST MV Compresses time to 1 60th accelerates operation by 60 times faster than normal 3 Checking the serial communications Control 1 Control 2 XC OFF 7 Blinking 3 Illuminated Short circuit terminals 2 and 3 on Short circuit terminals 2 and 3 on Initial self diagnostics g the indoor unit terminal plate the outdoor unit terminal plate R R i i Probable location of malfunction Quiet Timer Operation Quiet Timer Operation Quiet Timer Operation 3 2 1 3 2 Indoor unit circuit board failure Outdoor unit circuit board failure Failure open circuit contact failure etc in the inter unit wirings Outdoor unit circuit board failure Turn the power OFF before performing short circuiting procedures e Refer to the previous pages when performing system self diagnostics So that the check can be made quickly indicators blink at first communication after power ON Before performing the above checks perform TEST run operation and check that the rated voltage is output to terminals 1 and 2 on the outdoor unit If it is not output there is a failure related to the indoor unit power 37 10 4 Trouble Diagnosis of Fan Motor 10 4 1 Outdoor Fan Motor Only for GRF127R5I e This outdoor DC fan motor contains an internal control PCB Therefore it is not possible to measure the coil resist
48. n to all warning and caution notices given in this manual This symbol refers to a hazard WARNING or unsafe practice which can result in severe personal injury or death This symbol refers to a hazard CAUTION or unsafe practice which can result in personal injury or product or property damage 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 WARNING 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 possible fire hazard When Transporting Be careful when
49. ndoor Unit Indoor Unit MCAF94R5IAA Control PCB CB KRV93EH Control Circuit Fuse 250V 3 15A Remote Control Unit RCS 3HVPSN4E Type Q ty Dia and Length mm 1 D92 L634 Nominal Output W Coil Resistance Ohm BRN WHT 234 Ambient Temp 20 C PNK RED WHT 209 Safety Device Type Thermal fuse Operating Temp _ Open Run Capacitor Micro F 2 VAG 440 Flap Motor Type Model MP24Z3 Rating DCAM Coil Resistance Ohm Each Pair of Terminal 400 7 Ambient Temp 25 C Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE Indoor Unit MCAF124R5IAA Control PCB Part No CB KRV123EH Controls Control Circuit Fuse 250V 3 15A Remote Control Unit RCS 3HVPSN4E Q ty Dia and Length mm 1 D92 L634 Coil Resistance Ohm BRN WHT 234 Ambient Temp 20 C PNK RED WHT 209 Safety Device Type Thermal fuse Operating Temp _ Open Run Capacitor Micro F 2 VAG 440 Flap Motor Stepping Motor MP24Z3 DC 12V Coil Resistance Ohm Each Pair of Terminal 400 7 Ambient Temp 25 C Heat Exchanger Coil DATA SUBJECT TO CHANGE WITHOUT NOTICE 2 2 2 Outdoor Unit Outdoor Unit GRF97R5I Control PCB CB CRV93EH Control Circuit Fuse 250V 20A Compressor Single Rotary Hermetic Compressor Model Nominal Output G4CO90LU1ER 600W Compressor Oil Amount CC FV50S 320 Coil Resistance Ambient Temp 20 C U V 0 81 Safety Device CT P
50. nit e areas where leakage of flammable gas may be expected places where large amounts of oil mist exist DO e select an appropriate position from which every corner of the room can be uniformly cooled High on a wall is best select a location that will hold the weight of the unit e select a location where tubing and drain hose have the shortest run to the outside allow room for operation and maintenance as well as unrestricted air flow around the unit Fig 1 e install the unit within the maximum elevation difference H above or below the outdoor unit and within a total tubing length L from the outdoor unit as detailed in Table 1 and Fig 2 e Install the indoor unit more than 1 meter away from any antenna or power lines or connecting wires used for television radio telephone security system or intercom Electrical noise from any of these sources may affect operation Table 1 Max Allowable Tubing Model Length at Shipment m m Limit of Tubing Length L A Sc 15 cm min 5 cm min min DUNS NS Front View Fig 1 INDOOR Tubing length L UNIT Elevation OUTDOOR uil H UNIT Fig 2 CAUTION Indoor unit For stable operation of the air conditioner do not install wall mounted type de 8 Minimum height indoor units less than from floor level 1 5 m from floor level 1 5m Floor level Wall
51. nt of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand CAUTION To prevent the composition of R410A from changing never bleed the refrigerant gas into the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 20 46 Configuration and characteristics of cylinders Single valve Charge liquid refrigerant with cylinder in up side down position Fig 1 Single valve with siphon tube Charge with cylinder in normal position Fig 2 Lt 2 LS NO ky Charging cylinder Refrigerant cylinder Fig 3 12 6 In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit Follow the procedure described below to locate points of leaks and carry out repairs then recharge the refrigerant 1 Detecting Leaks e Use the detector for R410A to locate refrigerant leak points 2 Recovering refrigerant e Never release the gas to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R410A instead e Do not reuse the recovered refrigerant because its composition will have been altered 3 Welding leaking points e Confirm again that no residual refrigerant exists in the unit before starting welding e Weld securely using flux and
52. oor air temperature 35 C D B Heating Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating conditions Running amp 0 17 4 64 Power input 35 960 Rating conditions Indoor air temperature 20 C D B Outdoor air temperature 7 CD B 6 C W B Indoor Unit MCAF124R5IAA Outdoor Unit GRF127R5l Cooling Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating conditions Running amp 0 17 5 04 Power input 35 1 055 Rating conditions Indoor air temperature 27 C D B 19 C W B Outdoor air temperature 35 C D B Heating Indoor Unit Outdoor Unit Complete Unit Fan Motor Fan Motor Compressor Performance at 230V Single phase 50Hz Rating conditions Running amp Power input Rating conditions Indoor air temperature 20 C D B Outdoor air temperature 7 C D B 6 C W B 20 iagrams D MCAF94R5IAA Outdoor Unit GRF97R5I iring 6 2 Electric W Indoor Unit ing servicing 0 0008 L 0S S VA8 0 00992 2S S VA8 HOLON HOSS3HdlNOD AWI N S To avoid electrical shock hazard be sure to disconnect power before check and or cleaning any electrical parts A dzl4 SEER m 495 m D D HEE m Q 2 ge w 59 m e D K TJA NH YOLSINYAHL
53. ow operation speeds and PAM control at high operation speeds making the most effective use of power This function acts to raise the power but keeps the AC system in the same operating mode This function is set with the HIGH POWER button on the remote controller It can be set regardless of the temperature and fan speed settings HIGH POWER operation from remote controller The unit operates at maximum output for 30 minutes regardless of the desired temperature The fan speed is 1 step above High Frequency Time 30 min 5 min V Start End MAX NOTE When HIGH POWER operation ends the unit operates at low Hz for 5 minutes regardless of the thermostat OFF conditions When in DRY mode operation is in the cooling zone B Lamp colors OPERATION lamp HEAT operation DRY operation COOL operation FAN operation DEFROSTING operation Red Orange Green Green Red and Orange alternately TIMER lamp Green QUIET lamp Green B Timer backup Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of ON timer operation 32 B NIGHT SETBACK When NIGHT SETBACK operation is set the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep When NIGHT SETBACK operation is set mark appears on the remote controller The main unit display lamp also becomes dimmer
54. res refer to the installation manuals attached to the indoor unit and outdoor unit 44 12 5 In Case of Compressor Malfunction CAUTION e Should the compressor malfunction be sure to make the switch to a replacement compressor as quickly as possible Use only the tools indicated exclusively for R410A See 12 3 Tools Specifically for R410A 12 5 1 Procedure for Replacing Compressor 1 Recovering refrigerant e Any remaining refrigerant inside the unit should not be released to the atmosphere but recovered using the refrigerant recovery unit for R410A Do not reuse the recovered refrigerant since it will contain impurities 2 Replacing Compressor Soon after removing seals of both discharge and suction tubes of the new compressor replace it quickly 3 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 4 Evacuation Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back e The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 25L min and ultimate vacuum pressure rate of 0 05Torr Standard time for evacuation 1 Recover refrigeran
55. s device s antenna to a high sensitivity antenna Change the antenna cable to a BS coaxial cable Use a noise filter for the wireless device Use a signal booster 11 CHECKING ELECTRICAL COMPONENTS 11 1 Measurement of Insulation Resistance e The insulation is in good condition if the resistance exceeds 1M ohm 11 1 1 Power Supply Cord Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires Fig 1 Then also measure the resistance between the grounding and other power terminals Fig 1 11 1 2 Indoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate Fig 2 11 1 3 Outdoor Unit Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 11 1 4 Measurement of Insulation Resistance for Electrical Parts Disconnect the lead wires of the desired electric part from terminal plate capacitor etc Similarly disconnect the connector Then measure the insulation resistance Figs 3 and 4 NOTE Ref
56. t OK Y 2 Replace compressor OK 3 Check for sealing 4 Evacuation b Recharge Length of tubing Less than 10 meters More than 10 meters More than 10 minutes More than 15 minutes 45 5 Recharging e Be sure to charge the specified amount of refrigerant in liquid state using the service port of the wide tube service valve The proper amount is listed on the unit s nameplate When the entire amount cannot be charged all at once charge gradually while operating the unit in Cooling Operation Never charge a large amount of liquid refrigerant at once to the unit This may cause damage to the compressor When charging with a refrigerant cylinder use an electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to change Thus do not use the refrigerant if the amount in the charging cylinder is less than 20 Also charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit Example In case of charging refrigerant to a unit requiring 0 76Kg using a capacity of a 10Kg cylinder the minimum necessary amount for the cylinder is 0 76 10 x 0 20 2 76Kg For the remaining refrigerant refer to the instructions of the refrigerant manufacturer If using a charging cylinder transfer the specified amou
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