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12-SRK-T-126 Mar 2012 Technical Manual FDTC25-35VF

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2. Earth signal line Signal side terminal block PANEL INSTALLATION MANUAL Please read this manual together with the indoor unit s installation manual See page 16 N WARNING Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal Loose connection or hold will cause abnormal heat generation or fire Make sure the power supply is turned off when electric wiring work Otherwise electric shock malfunction and improper running may occur 1 Checking the indoor unit installation position Read this manual together with the air conditioner installation manual carefully Check if the gap between the ceiling plane and the indoor unit is correct by inserting the level gauge into the air outlet port of the indoor unit See below drawing Adjust the installation elevation if necessary Remove the level gauge before you attach the panel Use level gauges as reference adjust the bottom to the face of the indoor the T bar align the bottom of the level gauge to the lower face of the ceiling panel 2 Orientation of the panel and return air grille installation 1 Take note that there is an orientation to install the panel Attach the panel with the orientation shown on the below Align the PIPE SIDE mark on the panel with the refrigerant pipes on the indoor unit 2 The int
3. o Error code LED Green Red Content a RE Indoor Keeps flashing Stays OFF Power transistor anomaly 2 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Power transistor primary current 3 Condition of Error displayed If the power transistor primary current exceeds the setting value for 3 seconds the compressor stops 4 Presumable cause Faulty outdoor PCB Dust on control PCB Blown F2 fuse Check soldered Surfaces on the outdoor control PCB for foreign matter like dust fouling etc YES Isn t F2 fuse 250V 20A blown b Remove foreign matter like dust fouling etc Replace fuse Defective outdoor PCB Replace Note 12 SRK T 126 m Error code Remote controller E57 LED Green Red Indoor Keeps flashing Stays OFF or detection of service valve closure Insufficient refrigerant amount 1 Applicable model 5 Troubleshooting All models 2 Error detection method Judge insufficient refrigerant amount by detecting the temperature differnce between indoor heat exchanger ThI R and indoor return air ThI A 3 Condition of Error displayed When the insufficient refrigerant amount is detected 3 times within 60 minutes 4 Presumable cause
4. coil resistance 1 of compressor motor OK YES To next page 1 1 703Q U V V W U W or more at 20 C Error code LED Green Red Content Remote controller E42 Indoor control DCH Keeps flashing Stays OFF Current cut 1 2 2 J 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure Is the Power supply NO Check power supply voltage OK P PP y YES 1 Are the 2 Error detection method service valves NO Open the valves opened In order to prevent from overcurrent of inverter if the current exceeds the YES Check refrigerant amount specifications it makes the and refregerant circuit compressor stopping In case of transitional as increase of high pressure high pressure dui NO and or test run several uring operation times restarting may recover it because liquid YES refrigerant migrated in the compresser is discharged from the compressor insulation resistance and NO Replace compressor Note 12 SRK T 126 o Error code Remote controller E42 LED 1 Green Red Content Indoor Keeps flashing Stays OFF Current cut 2 2 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method In order to prevent from overcurrent of inverter if the current exceeds the specifications it makes the compressor stoppi
5. Content Gas piping Liquid piping Drain piping Hole or wiring Suspension bolis Air outlet opening for ducting 590 Suspension bolts pitch 8 m 1 Control Airretum N box hir supply grile TT 0413 700 Drain hose pee tested on st S i Holes for E tapping screws E t Hanger plate for suspension bot 4 Installation of indoor unit Work procedure 1 This units is designed for 2 x 2 grid ceiling If necessary please detach the T bar temporarily before you install it If itis installed on a ceiling other than 2 x 2 grid ceiling provide an inspection port on the control box side Arrange the suspension bolt at the right position 530mmx530mm Make sure to use four suspension bolts and fix them so as to be able to hold 500N load Ensure that the lower end of the suspension bolt should be 45mm above the ceiling plane Temporarily put the four lower nuts 88mm above the ceiling plane and the upper nuts on distant place from the lower nuts in order not to obstruct hanging the indoor unit or adjust the indoor unit position and then hang the indoor unit Control box Tier Ceiling panel Adjus
6. 46 10 1 Diagnosing of Microcomputer circuit 46 1 Selfdiagnosis function 46 2 Troubleshooting procedure 49 3 Troubleshooting at the indoor unit 49 4 Check of anomalous operation data with the remote controller 53 b Inverter checker for diagnosis of inverter output 54 6 Outdoor unit controller failure diagnosis circuit diagram 55 12 SRK T 126 10 2 Troubleshooting flow 56 p sl green puo r IDD Riba sima 56 PAY r_ibpelldkd 57 TL OPTIONPARTS 95 11 1 Instullation of wired remote controller RC E5 95 11 2 Wireles kit RCN TC 24VV ER _ 101 11 3 Simple wired remote controoller RCH E3 105 WHow to read the model name Example ndoor unit FDTC 25 VF Series code Product capacity Model name Ceiling cassette 4way compact type Outdoor unit SRC 25 Z JX S Series code Inveter type Product capacity Model name Outdoor unit 1 SPECIFICATIONS 12 SRK T 126 Adapted to RoHS directive Model FDTC25VF Indoor un
7. TH2 gt lt 4 Discharge pipe Gas pipiel x temp sensor Room temp pm 9 52 Check joint TH3 sensor ger sensor Th1 i f Th22 Away valve Accumlator Heat Heat exchanger MK exchanger Compressor Heat exchanger sensor Heat EN exchanger Electronic Capillary tube sensor expansion valve Th2 Liquid Service valve don pipe EEV Liquid 6635 Liquid Capillary tube gt KEN xV b Flare connection V Strainer Muffler 12 SRK T 126 6 RANGE OF USAGE amp LIMITATIONS Models FDTC25 35VF Hem Indoor return air temperature Upper lower limits Cooling operation Approximately 18 to 32 C D B Heating operation Approximately 10 to 27 C D B Outdoor air temperature Upper lower limits Cooling operation Approximately 15 to 46 C D B Heating operation Approximately 15 to 21 C D B Refrigerant line one way length Max 15m Max 10m Vertical height difference between Outdoor unit is higher outdoor unit and indoor unit Max 10m Outdoor unit is lower Power source voltage Rating 10 Voltage at starting Min 85 of rating Max 4 times h Inching prevention 10 minutes Frequency of ON OFF cycle ON and OFF interval Selection chart Correct the cooling and heating capacity in accordance with the conditions as follows The net cooling and heating capacity can be obt
8. Remote controller E1 LED fen Red Remote co Stays OFF communication Indoor Weem flashing ntroller circuit error U 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method When normal communication between the remote controller and the indoor unit is interrupted for more than 2 minutes Detectable only with the remote controller 3 Condition of Error displayed Same as above 4 Presumable cause Defective communication circuit between remote controller indoor unit Noise Defective remote controller Faulty indoor control PCB Is it possible to reset normally by the power reset v YES NO v Turn SW7 1 to OFF gt ON Remove the wire 9 connecting between indoor outdoor units v Power reset Does the drain pump restart automatically minute later YES NO L y Note 2 Does the remote controller still display f WAIT b even after 3 minutes Malfunction by noise Check peripheral environment Defective indoor control PCB gt Replace Defective remote controller Replace reset automatically Note H the indoor unit cannot communicate normally with the remote controller for 180 seconds the indoor unit PCB starts to 12 SRK T 126 m
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10. FAN SPEED button Every time this button is pressed the mode is switched as below EH l gt MED LO ER op 222 T AMPM AMPM AIR FLOVV button Used to swing the louver FILTER button Used to reset turn off the filter sign Press the button only after completing the filter cleaning OPERATION MODE select button Every time this button is pressed Bil displays switch as below 9 AUTO 4 COOL 1 HEAT FAN DRY ON TIMER button ROOM SETTING button Sets room temperature by pressing A or SZ button Sets time when setting the time OFF TIMER button Sets OFF TIMER operation TIMER CANCEL button Used to cancel the TIMER SETTINGS TIME SET UP switch RESET switch Sets current time Used to reset the microcomputer All displays are described in the liquid crystal display for explanation 104 11 3 Simple wired remote controller RCH E3 12 SRK T 126 Notes Following functions of Type F indoor unit series are not able to be set with this simple wired remote controller RCH E3 1 Individual flap control system for FDTC 2 4 fan speed setting PHi Hi Me Lo 3 fan speed setting Hi Me Lo for FDTC Names and functions of sections Operation Inspection lamp During operation Green failure Red MODE button Use to select the mode TE
11. Shot circuit 0 10 20 30 40 50 Temperature C Correct Connect connector Defective return air temperature thermistor gt Replace Defective indoor control PCB Replace Defective return air temperature thermistor input circuit Note 12 SRK T 126 6 Remote controller ES LED fen Red Indoor Keeps flashing 1 time flash Heating overload operation J 1 Applicable model 5 Troubleshooting All models 2 Error detection method Indoor heat exchanger temperature thermistor ThI R1 R2 R3 3 Condition of Error displayed When it is detected 5 times within 60 minutes from initial detection or when the overload condition is detected for 6 minutes continuously 4 Presumable cause Clogged air filter Defective indoor heat exchanger temperature thermistor connector Defective indoor heat exchanger temperature thermistor Anomalous refrigerant system Diagnosis Countermeasure NO Is the air filter clogged YES gt Wash Is the Defective indoor heat indoor heat exchanger temperature thermistor NO gt exchanger temperature connection OK thermistor connector Correct YES 2 S Are the Defective indoor heat characteristics of indoor h t tu heat e
12. 3 Condition of Error displayed 4 Presumable cause D Improper installation work Improper anti vibration work at instllation Insufficient strength of mounting face O Defective product Before after shipping from factory Improper adjustment during commissioning Excess shortage of refrigerant etc noise vibration occur during or soon after stopping operation of air conditioner NO Does the installation of indoor outdoor unit loose Installation work Does noise vibration occur not only from the air conditioner but also from entire building Are pipes touching the wall etc Product Does noise vibration occur from operating fan fan only Is there a fan or louver touching other components If excessive noise vibration persists when sufficient time has elapsed after stopping the unit it is considered that the air conditioner is not the source Check the installed condition carefully and correct the position or insert rubber cushions or others into the gap if necessary Prevent the vibration from transmitting to wall and etc by fixing pipes on the wall or wrapping rubber cushion around the pipe which goes through the hole in the wall or applying other appropriate means Strength of ceiling wall floor etc may be insufficient Review the installing position or reinforce it Check for leani
13. Defective indoor heat exchanger temperature thermistor Defective indoor return air temperature thermistor Defective indoor control PCB nsufficient refregerant amount Diagnosis Countermeasure Is the service valve fully NO gt Open fully opened YES connections of indoor heat exchanger and or return air NO pl Correct indoor heat temperature thermistor connectors OK YES Are the characteristics of indoor heat exchanger and or return air temperature thermistor OK YES Is the low pressure during operation normal exchanger return air temperature thermistor connector connections NO Defective indoor heat exchanger return air temperature thermistor gt Replace NO gt Charge refrigerant Defective indoor control Indoor heat exchanger return air temperature thermistor Temperature resistance characteristics Broken wire YES PCB Replace Defective indoor heat exchanger return air temperature thermistor input circuits 15 5kQ at 25 C Temperature thermistor resistance kQ Shot circuit 0 10 20 Temperature C 30 40 50 Note When the compressor speed is 50 rps or under at 5 minutes after the start of compressor or the completion of defrosting the low refrigerant protection control judges by detecting the d
14. The remote controller LCD displays WAIT t 2 minutes after the power on NO Turn the breaker off once and then back on again 3 minutes later Is normal condition restored 2 Error detection method Isn t blown the power supply fuse 15A on the outdoor unit controller Is AC220 240V detected at the secondary side of Replace the NO power supply fuse outdoor PCB Is the NO NO green LED of indoor unit 3 Condition of Error displayed Is approx DC20V detected between 2 3 NO on the outdoor unit terminal block YES Is approx DC20V detected between NO NO on the indoor unit terminal block YES 4 Presumable cause Blown fuse Faulty outdoor PCB Connection between PCB s Faulty indoor control PCB Defective remote controller Broken remote controller wire See next page Defective outdoor PCB Replace Defective indoor control PCB Replace Replace indoor control PCB Correct connection wires between indoor and outdoor units Defective outdoor PCB Replace Defective connection wire broken wire Noise Defective indoor control PCB Replace turn the breaker off and wait for 3 minutes Note If any anomaly is detected during communication the error code E5 is displayed Inspectio
15. In case of exposing cord lt 8 You can pull out the remote controller cord from left upper part or center upper part Upper Cut off the upper thin part of remote controller lower case with a nipper or knife lt and grind burrs with a file etc Ce Lower case 4 Install the lower case to the flat wall with attached two wooden screws 0 Cp v Lower 12 SRK T 126 S Connect the remote controller cord to the Upper Sheath Upper Sheath terminal block d Connect the terminal of remote controller X Y Board Upper case Upper case with the terminal of indoor unit X Y X and Y are no polarity Xx N Wiring route is as shown in the right diagram JAE depending on the pulling out direction Lower Wiing Lower Wiring In case of pulling out from In case of pulling out from upper left upper center The wiring inside the remote controller case should be within 0 3mm recommended to 0 5mm The sheath should be peeled off inside the remote controller case The peeling off length of each wire is as below Pulling out from upper left Pulling out from upper center X wiring 215mm X wiring 170mm Y wiring 195mm Y wiring 190mm The peeling off length of sheath 6 Install the upper case as before so as not to catch up the remote controller cord and tighten with the screws Incase of exposing cord fix th
16. Defective outdoor fan motor Defective outdoor PCB Anomalous power supply voltage Improper refrigerant amount and refrigerant circuit Defective compressor motor bearing Is the power supply voltage OK YES Y NO gt Reset the power supply and restart operation Is the output from inverter Does E59 occur compressor run without occurrence of YES D NO Does the NO E42 NO checker OK Is the noise or vibration of compressor normal YES Does it Start up normally without recurrence of E60 YES NO Y NO Check and correct the power supply voltage Correct it based on the troubleshooting of E59 Correct it based on the troubleshooting of E42 Defective outdoor PCB Replace Replace compressor Check compressor for insulation resistance Replace compressor if necessary Defective outdoor PCB Replace Note Insulation resistance The unit is left for long period without power supply or soon after installation migrated liquid refrigerant may dissolve in the refrigerant oil in the compressor In such case insulation resistance decreases upto several MQ or lower If the electric leakage breaker is activated due to low insulation resistance check followings Check whehter the insulation resistance can recover or not ater 6 hours has passed since power ON By ener
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18. Compressor O x 4 way valve x Outdoor unit fan O x Indoor unit fan O x Louver motor O x i 3 Thermostat ON O Drain pump Thermostat OFF X Note 1 O Operation X Stop O X Turned ON OFF by the control other than the room temperature control 2 ON during the drain motor delay control 3 Drain pump ON setting may be selected with the indoor unit function setting of the wired remote controller Dehumidifying operation 1 When the humidity sensor is not provided Return air temperature thermistor Thi A by the remote controller when the remote controller thermistor is enabled controls the indoor temperature environment simultaneously a Operation is started in the cooling mode When the difference between the return air temperature and the setting temperature is 2 C or less the indoor unit fan tap is brought down by one tap That tap is retained for 3 minutes after changing the indoor unit fan tap b If the return air temperature exceeds the setting temperature by 3 C during defrosting operation the indoor unit fan tap is raised That tap is retained for 3 minutes after changing the indoor unit fan tap Ifthe thermostat OFF is established during the above control the indoor unit fan tap at the thermostat ON is retained so far as the thermostat is turned OFF d After stopping the cooling operation the indoor unit continues to run at Lo for 15 seconds 2 When the humidity thermisto
19. Descending slope greater than 1 100 277727 x As vide as possible When sharing a drain pipe for more than one aboutthm unit lay the main pipe 100mm below the drain outlet of the unit In addition select VP 30 or NE B 5 4 I T bigger size for main drain pipe VP rbigge r 4 Insulate the drain pipe Bscending stop greater than Be sure to insulate the drain socket and rigid PVC pipe installed indoors otherwise it may cause dew condensation and water leakage X After drainage test implementation cover the drain socket part with pipe cover small size then use the pipe cover big size to cover the pipe cover small size clamps and part of the drain hose and fix and wrap it with tapes to wrap and make joint part gapless The position for drain pipe outlet can be raised up to 600mm above the ceiling Use elbows for installation to avoid obstacles inside ceiling If the horizontal drain pipe is too long before vertical pipe the backflow of water will increase when the unit is stopped and it may cause overflow of water from the drain pan on the indoor unit In order to avoid overflow keep the horizontal pipe length and offset of the pipe within the limit shown in the figure below 290 25m 00 or less Drain hose dl n NL Joint for VP 20 Prepare on site 60mm or less E 12 SRK T 126 Drain pipe continued Panel
20. Each function of the remote controller and the indoor unit is automatically set to the initial setting which is the standard use on the occasion of connecting the remote controller with the indoor unit In the case of the standard use the setting change is unnecessary However if you whould like to change the initial setting O change the setting for only the item of the function number Record the setting contents and stored them 1 Function setting item by switch on PCB Switch No Setting Setting detail Initial setting Switch No Setting detail Initial setting sw1 1 ON Slave remote controller SW1 5 TEMP button prohibited OFF Master remote controller button enabled SW1 2 ON Remote controller thermistor enabled SW1 6 FAN SPEED button prohibited X Note 1 OFF Remote controller thermistor disabled FAN SPEED button enabled X Note 1 ON MODE button prohibited SW1 7 Auto restart function enabled As for the slave remote controller function setting is impossible O OFF MODE button enabled Auto restart function disabled O other than SW1 1 SW1 3 ON ON OFF button prohibited OFF ON OFF button enabled SW1 8 9 Not used e In the indoor unit with only one fan speed FAN SPEED button cannot be enabled SW1 4 2 Function setting item by button operation
21. Protection State No of The Compressor IFE Outdoor Unit Fan Speed EH 63H1 On Off DEFROST Defrost Control On Off TOTAL GOMP RN H Total Running Hours of The Compressor DAUEVI P O UEEV P Depending on models the items that do not have corresponding data are not displayed To display the data of a different indoor unit press the AIR CON NO selection screen DON OFF Pressing the button will stop displaying data Pressing the the previous screen Pulse of The Outdoor Unit Expansion Valve EEVC Pulse of The Outdoor Unit Expansion Valve EEVH button which allows you to go back to the indoor unit Z RESET button during remote control unit operation will undo your last operation and allow you to go back to GIf two 2 remote controllers are connected to one 1 inside unit only the master controller is available for trial operation and confirmation of operation data The slave remote controller is not available 12 e SRK T 126 5 Inverter checker for diagnosis of inverter output Checking method a Setup procedure of checker 1 Power OFF Turn off the breaker 2 Remove the terminal cover of compressor and disconnect the vvires U V VV from compressor 3 Connect the vvires U Red V VVhite and VV Black of the checker to the terminal of disconnected vvires U V VV from compressor respectively b Operation for judgment 1 Power
22. e The indoor fan is stepped up by 1 speed step 3 Reset conditions The outdoor air temperature TH2 is lower than 21 C g h j 12 SRK T 126 Heating low outdoor temperature protective control 1 Operating conditions When the outdoor air temperature TH2 is lower than 10 C or higher continues for 30 sec onds while the compressor command speed is other than 0 rps 2 Detail of operation The lower limit compressor command speed is change as shown in the figure below puentes Lower limit 45 rps Lok Normal operation 10 7 Outdoor air temperature C 3 Reset conditions When either of the following condition is satisfied a outdoor air temperature TH2 becomes 7 C b compressor command speed is 0 rps Compressor overheat protection 1 Purpose It is designed to prevent deterioration of oil burnout of motor coil and other trouble resulting from the compressor overheat 2 Detail of operation a Speeds are controlled with temperature detected by the sensor mounted on the discharge pipe After lapse of 3 min or over EBEN 4 rps After lapse of 3 min or over mic 0 After lapse of 3 min or over Lower limit Example Fuzzy 90 100 110 Discharge pipe temperature C Notes 1 When the discharge pipe temperature is in the range of 100 110 C the speed is reduced by 4 rps 2 When the discharge pipe temperature is raised and continues operation
23. Classification Function No Function Setting No Setting Initial setting Remarks 01 Fan speed three steps X Note 1 The fan speed is three steps 3t uml Sam 36 s 02 Fan speed two steps Hi Lo X Note 1 The fan speed is two steps 03 Fan speed two steps Hi Me The fan speed is two steps ami Sam 04 Fan one step X Note 1 The fan speed is fixed to one step 01 Remote controller thermistor no offset 02 Remote controller thermistor 3 0 C At the time of cooling in the case of remote controller thermistor enabled offset temperature at 3 0 C Remote controller 03 Remote controller thermistor 2 0 C At the time of cooling in the case of remote controller thermistor enabled offset temperature at 2 0 C thermistor at the time 04 Remote controller thermistor 1 0 C At the time of cooling in the case of remote controller thermistor enabled offset temperature at 1 0 C of cooling 05 Remote controller thermistor 1 0 C At the time of cooling in the case of remote controller thermistor enabled offset temperature at 1 0 C 06 Remote controller thermistor 2 0 C At the time of cooling in the case of remote controller thermistor enabled offset temperature at 2 0 C Remote 07 Remote controller thermistor 3 0 C At the time of cooling in the case of remote controller thermistor enabled offsett temperature at 3 0 C controller 01 Remote controller thermistor no offset function 02 Remote controller thermistor 3
24. Error code Remote controller E5 LED feen Red Indoor Keeps flashing 2 times flash Communication error during operation U 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method When normal communication between indoor and outdoor unit is interrupted for more than 2 minutes 3 Condition of Error displayed Same as above is detected during operation 4 Presumable cause Unit No setting error Broken remote controller wire Faulty remote controller wire connection Faulty outdoor PCB Note 1 Inspect faulty connections disconnection looseness on the outdoor unit terminal block connection of signal wires at the outdoor unit NO YES Note 2 Check for faulty connection or breakage of signal wires between indoor outdoor units Isthe connection of signal wires between indoor outdoor units OK NO YES Power reset Has the remote controller LCD returned to normal state NO gt Repair signal wires Repair signal wires Defective outdoor PCB Defective network communication circuit gt Replace Unit is normal Malfunction by temporary noise etc Note 12 SRK T 126 Error code Remote controller E6 LED fen
25. For the group control lay connect with sires wiring between rooms using terminal blocks X Y of remote controller Connect the remote controller communication wire separately from the power supply wire or wires of other electric devices AC220V or higher High ceiling control In the case of indoor unit installed in a higher ceiling room the airflow volume mode control can be changed with the wired remote controller indoor unit function FAN SPEED SET Indoor unit airflow setting Bail Sai Sei Seil Sal MET Si eath Su Sal Sal Fan tap FAN SPEED SET STANDARD UH Hi Me Lo Hi Me Lo Hi Lo Hi Me HIGH SPEEDI 2 UH UH Hi Me UH Hi Me UH Me UH Hi Notes 1 Factory default is Standard 2 At the hot start and heating thermostat OFF or other the indoor unit fan is operated at the low speed tap of each setting 3 This function is not able to be set vvith vvireless remote controller or simple remote controller RCH E3 Abnormal temperature thermistor return air indoor heat exchanger vvire short circuit detection 1 2 Broken wire detection When the return air temperature thermistor detects 50 C or lower or the heat exchanger temperature thermistor detect 50 C or lower for 5 seconds continuously the compressor stops After a 3 minute delay the compressor restarts but if it is detected again within 60 minutes after the initial detection for 6 minutes co
26. Installation and wiring of remote controller Wiring of remote controller should use 0 3mm x 2 core wires or cables on site configuration Maximum prolongation of remote controller wiring is 600 m If the prolongation is over 100m change to the size below But the wiring in the remote controller case should be 0 3mm recommended to 0 5mm Change the wire size outside of the case according to wire connecting Waterproof treatment is necessary at the wire connecting section Be careful about contact failure 100 200m 0 5mm x 2 cores Under 300m 0 75mm x 2 cores Under 400m 1 25mm x 2 cores Under 600m 2 0mm x 2 cores 12 SRK T 126 3 Master slave setting when more than one remote controller are used 1 Up to two remote controllers can be connected to one unit or one group of indoor unit Switch Setting Function detail Slave remote controller SW1 1 on i OFF Master remote controller indoor unit Remote controller line nonpolarity 1 Remote controller Maste a 1 Remote controller Slave 1 SW1 1 OFF 1 SW1 1 ON 2 Setthe switch SW1 1 of the slave remote controller is Slave ON The factory default is set as Master OFF Note e The remote controller thermistor enabled setting can be set only to the master remote controller e Install the master remote controller at the position to detect room temperature e The air condi
27. NO Do more than one indoor units have the YES same address NO Is it set to a slave indoor unit YES SW5 1 2 NO Is there loose or wrong connection at the termanal YES of wiring between indoor and Outdoor units Is the YES grounding wire connected properly YES Is approx DC20V detected between NO on the outdoor unit terminal block YES Is approx DC20V detected between NO on the indoor unit terminal block Es NO Reduce to 2 units or less Change remote controller setting to Master SW1 on remote controller PCB Change address SW2 on indoor control PCB Change to master SW5 1 2 on indoor control PCB Correct Correct Defective outdoor control PCB Replace Broken connecting wire Correct Defective indoor control or power PCB Replace INSPECT VU Note If any error is detected 30 minutes after displaying fh WAIT ff on the remote controller the display changes to 12 SRK T 126 o LED Green Red Remote controller f WAIT fi Indoor Keeps flashing Stays OFF Communication error at initial operation 1 3 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure When the remote controller LCD displays ith WAIT th 2 minutes after the power on
28. Touching the rotating equipment hot surface or high voltage section could cause an injury 10 be caught in the machine to get burned or electric shock Shut off the power before electrical wiring work R could cause electric shock unit failure and improper running 12 SRK T 126 PJAO12D786 A CAUTION Perform earth wiring surely Do not connect the earth wiring to the gas pipe water pipe lightning rod and telephone earth wiring Improper earth could Cause unit failure and electric shock due tp a short circuit Earth leakage breaker must be installed If the earth leakage breaker is not installed it can cause electric shocks Use the circuit breaker of correct capacity Circuit breaker should be the one that disconnect all poles under over current Using the incorrect one could cause the system failure and fire Do not use any materials other than a fuse of correct capacity where a fuse should be used S Connecting the circuit by wire or copper wire could cause unit failure and fire Do not install the indoor unit near the location where there is possibility of flammable gas leakages S If the gas leaks and gathers around the unit it could cause fire Do notinstall and use the unit where corrosive gas such as sulfurous acid gas etc or flammable gas such as thinner petroleum e may be generated or accumulate or anna substances are handed t could cause the corrosion of heat exchanger breakage
29. AS How to install the receiver Put the wiring in the control box with other wiring as shown below Connect the wiring to the terminal block X Y provided in the control box Non polarized The receiver can be installed by replacing with a corner panel on the applicable decorative panel Fix the wiring with the clamp as shown below Reattach the control box lid with 2 screws removed Preparation before installation Attach the decorative panel onto the air conditioner according to the installation manual for the panel Remove the air return grille Remove a corner panel located on the refrigerant pipes side Remove two screws and detach the lid from the control box of the air conditioner r X Note Make sure wires not to be pinched by any other parts like panel and control box Drain plug N i Drain pipe Refrigerant pipes Setting on site PCB on the receiver has the following switches to set the functions Default setting is shown Terminal block X Y in the indoor with mark unit control box SVV1 Customized signal setting to avoid ON Normal Han 1 mixed communication OFF Remote
30. B button simultaneously for three seconds or more The following is displayed if the number of the indoor units connected to the remote controller is one Go to step 4 aiU K Phi a The following is displayed if the number of the indoor units connected to the remote controller are more than one bal lad 14000 04 2 Press A or Y button selection of indoor unit Select the indoor unit of which the louver is set EXAMPLE 1 0000 All 0 971 002 Sie 14003 er 3 Press Gl SET button determination of indoor unit Selected indoor unit is fixed n case the louver No to be set is uncertain EXAMPLE set any louver temporarily 110001 displayed for two seconds The louver will swing once when the setting is completed and it is possible to confirm MALMO the louver No and the position sassa y After that choose the correct louver No and b set the top and bottom position 4 Press A or V button selection of louver No Select the louver No to be set according to the right figure EXAMPLE AONO 41 150 2 f fe OMA Y 5 Press DE SET button Determination of louver No The louver No to be set is confirmed and the display shows the upper limit of the movable range EXAMPLE if No louver is selected No 1 UPPER2 current upper limit position Press A or Y button selection of upper limit position Select the upper limit of louver movable range position 1 is the most horizontal and position
31. Bl Occurrence of one kind of error Displays are shovvn respectively according to errors Bl Occurrence of plural kinds of error Section Category of display Error code on remote controller Red LED control PCB ELE 5 on indoor Displays the error of higher priority When plural errors are persisting WT E E35 Eb Displays the present errors When a new error has occurred after the former error was reset B Error detecting timing temperature sensor anomaly Section Error description Error code Error detecting timing Drain trouble Float switch E g Whenever float switch is activated after 30 second had past since activated power ON Communication error at m WAIT No communication between indoor and outdoor units is initial operation established at initial operation Remote controller I Communication between indoor unit and remote controller is SE E I interrupted for mote than 2 minutes continuously after initial communication was established sarda Communication between indoor and outdoor units is interrupted 8 E 5 for mote than 2 minutes continuously after initial communication operation Indoor was established Excessive number of connected indoor units by E I Whenever excessively connected indoor units is detected after controlling with one remote power ON controller Return air temperature E 50 C or lower 15 detected for 5 seconds
32. Is the temperature differnce between return and supply air 10 30degC at heating Does the heat load increase after installtion NO YES NO Y Mistake in model selection Calculate heat load once again Is the compressor NO operating B WAIT tts fessage is displayed for 3 seconds when It is normal This unit is designed to start in the soft start mode by detecting the under dome temperature of compressor when it restart after power reset It is necessary to replace to higher capacity one or to install additional unit Compressor refrigerant oil protection control at starting performing cooling defrosting and heating YES gt is activated operations from the remote Compressor may be stopped by the error No detection control For the contents of control 3 Condition of Error displayed refer to anomalous stop control by controlling compressor rotation speed of microcomputor control functions Is the I S nspect the followings WE i NO Minor clogging of filter 17777 Minor clogging of heat exchanger YES Minor short circuit Y Minor shortage of Check which control Determination control of refrigerant amount conpressor rotation speed or Protective control Poor compression of by controlling compressor rotation speed is compressor appropriate to this phenomeno
33. MO VEN Q In case of Single split series by connecting ventilation device to CNT of the WENT LINK indoor printed circuit board in case of VRF series by connecting it to CND of the indoor printed circuit board the operation of ventilation device is linked with the operation of indoor unit In case of Single split series by connecting ventilation device to CNT of the indoor printed NO WENT LINK circuit board in case of VRF series by connecting it to CND of the indoor printed circuit iP EST board you can operate stop the ventilation device independently by VENT button IEN CHANGE o lfyou change the range of set temperature the indication of set temperature will vary following the control NO INDN CHANGE If you change the range of set temperature the indication of set temperature 73 LAN will not vary following the control and keep the set temperature HI MID LO x Airflow of fan becomes of amp uill Sg Seil or the four speed of Sg Sat Reg u HI LU X Airflow of fan becomes of Sat Seil HI MID Airflow of fan becomes of Sat Saul 1 FAM SPEED X Mirflow of fan is fixed at one speed POSITION If you change the remote controller function 14 POSITION you must change the indoor function 04 POSITION accordingly You can select the louver stop position in the four The louver can stop at any position 15 MODEL TYPE AP S T N STOP FREE STOP o If you input signal int
34. Press A or Y button Select the setting SET COMPLETE Press SET button SET COMPLETE will be indicated and the setting will be completed Then after No and function indication returns set as the same 7 Press ON OFF button procedure if you want to set continuously and if to finish go to 7 Setting is finished SET COMPLETE X When plural indoor units are connected to a remote controller press the AIRCON NO button which allows you to go back to the indoor unit selection screen example I U 000 A It is possible to finish by pressing ON OFF button on the way but unfinished change of setting is unavailable During setting if you press 2 RESET button you return to the previous screen Setting is memorized in the controller and it is saved independently of power failure How to check the current setting When you select from No and funcion and press set button by the previous operation the Setting displayed first is the current setting But if you select ALL UNIT W the setting of the lowest number indoor unit is displayed 100 12 SRK T 126 11 2 Wireles kit RCN TC 24W ER Notes Following functions of FDTC Type F indoor unit series are not able to be set with this wireess remote controller RCN TC 24W ER 1 Individual flap control system 2 4 fan speed setting PHi Hi Me Lo 3 fan speed sett
35. protect the remote controller with a packaging box Q or bag in order to keep it away from water and dust Accessories Remote controller wood screw 3 5 X 16 2 pieces Prepare on site Remote controller cord 2 cores Refer to 2 Installation and wiring of remote controller In case of embedding cord Electrical box M4 screw 2 pieces In case of exposing cord Cord clamp if needed 1 Installation procedure In case of embedding cord 1 Make certain to remove the screw on the bottom surface of the remote controller 2 Remove the upper case of the remote controller Insert a flat blade screwdriver to a concave portion of the bottom surface of the remote controller and slightly twist it and the case is removed Pre bury the electrical box and remote controller cord Remote controller cord N Electrical box Prepare on site 3 Prepare two M4 screws recommended length 12 16mm and install the lower case to the electrical box Do not use a screw whose screw head is larger than the height of the wall around the screw hole 1 4 2 Two M4 screws head 08 or less prepare on site LE Connect the remote controller cord to the terminal block Connect the terminals X and Y of the remote controller and the terminals X and Y of the indoor unit No polarity of X and Y Mount the upper case for restoring to its former state so as not to
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38. temperature thermistor return air indoor heat exchanger remote controller switch and fuse Note 1 With regard to parts of high voltage circuits and refrigeration cycle judge it according to ordinary inspection methods b Instruction of how to replace indoor control PCB SAFETY PRECAUTIONS e Read the SAFETY PRECAUTIONS carefully first of all and then strictly follow it during the replacement in order to protect yourself The precautionary items mentioned below are distinguished into two levels WARNING and CAUTION Both mentions the important items to protect your health and safety so strictly follow them by any means Wrong installation would cause serious consequences such as injuries or death Wrong installation might cause serious consequences depending on circumstances After completing the replacement do commissioning to confirm there are no anomaly A WARNING e Replacement should be performed by the specialist If you replace the PCB by yourself it may lead to serious trouble such as electric shock or fire Replace the PCB correctly according to these instructions Improper replacement may cause electric shock or fire e Shut off the power before electrical wiring work Replacement during the applying the current would cause the electric shock unit failure or improper running It would cause the damage of connected equipment such as fan motor etc e Fasten the wiring to the terminal securely and hold the cable
39. type indoor unit and is automatically defined From previous page 12 SRK T 126 Operation message How to set function Function description 1 Stop air conditioner and press J SET MODE setting description buttons at the same time for over three seconds and the FUNCTION SET Y will be displayed Function No Fixing button FUNCTION SET Press SET button Make sure which do you want to set E FUNCTION Y remote controller function or I U FUNCTION AT indoor unit function 4 Press A or V button Selecct E FUNCTION Y remote controller function or I U FUNCTION A indoor unit function Finishing button Starting button N 6 Indoor unit selection button Previous screen button EJ FUNCTION Y 5 Press SET button TUR x 6 On the occasion of remote controller function selection On the occasion of indoor unit function selection DATA LOADING Indication with blinking DATA LOADING Blinking for 2 to 23 seconds to read the data 4 4 Display is changed to 01 AAA ESP SET Indication is changed to 02 FAN SPEED SET Goto C Press A or Y button No and function are indicated by turns on the remote Note controller function table then you can s
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43. A Y button Press SET button to fix When UPPER LIMIT Y is selected valid during heating CD Indication V SET UP UPPER 30 C V 2 Select the upper limit value with temperature setting button V A Indication example UPPER 26 C V blinking 3 Press SET button to fix Indication example UPPER 26 C Displayed for two seconds After the fixed upper limit value displayed for two seconds the indication will return to UPPER LIMIT Y When LOWER LIMIT A is selected valid during cooling dry fan automatic CD Indication b V A SET UP gt LOWER 18 C A Q Select the lower limit value with temperature setting button V A Indication example LOWER 24 C V blinking 3 Press CO SET button to fix Indication for example LOWER 24 C Displayed for two seconds After the fixed lower limit value displayed for two seconds the indication will return to LOWER LIMIT Y Press ON OFF button to finish 4 IN ON OFF button on the way but ch Q ON OEF unfinished change of setting is Wy 1 8 unavailable 3 5 6 3 A CcexrceJ3ceg 79 TIMER SeT 3 RESET button you return to the x previous screen LOUVER VENTI The functional setting The initial function setting for typical using is performed autom
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45. OFF Stays OFF Stays OFF Stays OFF Stays OFF Green LED Keeps flashing Keeps flashing Keeps flashing Keeps flashing 12 SRK T 126 Reference Location of trouble Description of trouble Repair method Installation operation status Higher outdoor heat exchanger temperature Replacement repair Outdoor heat exchanger F Defective outdoor heat exchanger temperature sensor of temperature temperature sensor sensor Replacement of Outdoor control PCB e Defective outdoor control PCB Defective temperature sensor input circuit PE Installation operation status Higher discharge temperature Repair I Replacement repair Discharge pipe temperature Defective discharge pipe temperature sensor of temperature Sensor Sensor Replacement of PCB Replacement repair Outdoor control PCB e Defective outdoor control PCB Defective temperature sensor input circuit Outdoor heat exchanger Defective outdoor heat exchanger temperature sensor broken wire or poor of temperature temperature sensor connector connection Sensor Replacement of PCB Replacement repair Outdoor control PCB e Defective outdoor control PCB Defective temperature sensor input circuit Outdoor air temperature sensor Defective outdoor air temperature sensor broken wire or poor connector connection of temperature Sensor Replacement of PCB Replacement repair Outdoor control PC
46. ON This is not displayed under the Remote mode If this display is not shown under the Center Remote mode check if the indoor unit power switch is turned on or not f Hot start Cold draft prevention at heating At the startup of heating operation at resetting of the thermostat during defrost operation and at returning to heating the indoor fan is controlled by the indoor heat exchanger temperature detected with Thi R for preventing the cold draft gt Lo OFF Judgment by heating start thermostat Thermostat OFF Thermostat ON Set airflow volume Lo Set airflow volume Fan Fan i 35 25 35 Indoor heat exchanger temperature C Indoor heat exchanger temperature C Heat exchanger temp 35 C or higher or after 7 minutes Heat exchanger temp 35 C or higher or after 7 minutes Normal condition Set airflow volume Compressor ON Compressor OFF Defrosting start End of defrosting Set airflow volume Set airflow volume L j 1 Fan 4 Lo i i i 25 35 45 Indoor heat exchanger temperature C Indoor heat exchanger temperature C Note 1 Heating preparation is displayed during the hot start when the compressor is operating and the indoor fan does not provide the set airflovv volume g h j 12 SRK T 126 Hot keep Hot keep control is performed at the start of the
47. ON and start check operation on cooling or heating mode 2 Check ON OFF status of 6 LED s on the checker 3 Judge the PCB by ON OFF status of 6 LED s on the checker ON OFF If all of LED are ON OFF If all of LED stay OFF or status of LED according to following pattern some of LED are ON OFF Outdoor PCB Normal Anomalous Power ON During this period ON OFF status of LED is repeated cyclically according to following pattern 4 Stop check operation within about 2minutes after starting check operation LED LED ON OFF pattern Inverter Checker gt LED1 LED1 LED1 LED1 LED1 LED1 LED2 LED2 1502 1502 1202 1502 ON Faston terminal Connect to the terminal of the wires which are disconnected from compressor 12 SRK T 126 6 Outdoor unit controller failure diagnosis circuit diagram AOZ xordde pue 0 Oq s yerir so o3e oA OU JI eurroN 0 2 2 0 2 022 OV o D 2 092 022 OV Q 01 CD uon dsul jeus eres pue e24nos 1 MOd s AME a MEE ME ILE 010 HL UL 1220 IL MH G GG G MHIL 222 HL HL HEIL 222 IL 1 7 un mmm 1222 oun w un ou aun unm 68 23ed oos J0joui UEL 100pjno uonoedsu ASH CHL HLIHL um mu mu nm mmm HIO ML Au UL IL MOM UM um 2222 U LL um UIS TAND AHHN HIN SOCNO WHMOd DNIHOLIMS 2 VO
48. Red Indoor Keeps flashing 1 time flash Indoor heat exchanger temperature thermistor anomaly J 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Anomalously low temperature or high temperature resistance is detected on the indoor heat exchanger thermistor ThI R1 R2 or R3 3 Condition of Error displayed When the temperature thermistor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minutes delay the compressor starts again automatically but if this error occurs again within 60 minutes after the initial detection Or if 70 C or higher is detected for 5 seconds continuously 4 Presumable cause Defective indoor heat exchanger thermistor connector Indoor heat exchanger temperature thermistor anomaly Faulty indoor control PCB Is e connection of indoor heat exchanger temperature thermistor connect YES A thermis Broken wire ature thermistor resistance kO Temper characteristics of indoor heat exchanger temperature NO or OK Te NO or OK YES Temperature resistance characteristic Shot circuit 10 20 30 40 50 Temperature C Correct Insert connector securely Defective indoor
49. Thermostat ON output 4 XR3 5 1 Error output CnT 5 XR4 1 1 IB 4 lli 5 Remote operation input CnT 6 No voltage contactor T XR5 Output for external control remote display Following output connectors CnT are provided on the indoor control PCB for monitoring operation status Operation output Outputs DC12V signal for driving relay during operation Heating output Outputs DC12V signal for driving relay during heating operation Thermostat ON output Outputs DC12V signal for driving relay when compressor is operating Error output Outputs DC12V signal for driving relay when anomalous condition occurs 12 SRK T 126 2 Remote operation input Remote operation input connector CnT 6 is provided on the indoor control PCB However remote operation by CnT 6 is not effective when Center mode is selected by center controller In case of plural unit twin triple double twin remote operation input to CnT 6 on the slave indoor unit is Invalid Only the LEVEL INPUT is acceptable for external input however when the indoor function setting of Level input Factory default or Pulse input is selected by the function for External input of the wired remote controller operation status will be changed as follows a In case of Level input setting Factory default Input signal to CnT 6 is OFF ON unit ON Input signal to CnT 6 is ON OFF unit OFF Operation is not invert
50. Unit type Power supply specification O Pipes Wires Small paris O Accessory i For unit hanging For refrigerant pipe For draom pipe Flat washer M10 Level gauge Insulation Pipe cover big Pipe cover small Pipe cover big Pipe cover small Drain hose Hose clamp D om u 02 d 8 4 3 1 4 1 1 1 For unit hanging For adjustment in hoisting in the units main body For heat insulation ol gas pipe For heat insulation of liquid tube For pipe cover fixing For heat insulation of drain socket For heat insulation of drain socket For drain pipe connecting For drain hose mounting Selection of installation location for the indoor unit Select the suitable areas to install the unit under approval of the user Areas where the indoor unit can deliver hot and cold wind sufficiently Suggest to the user to use a circulator if the ceiling height is over 3m to avoid warm air being accumulated on the ceiling Areas where there is enough space to install and service Areas where it can be drained properly Areas where drain pipe descending slope can be taken Areas where there is no obstruction of airflow on both air return grille and air supply port Areas where fire alarm will not be accidentally activated by the air conditioner Areas where the supply air does not short circuit Ar
51. c d After start of heating operation VVhen it elapsed 45 minutes Accumulated compressor operation time After end of defrosting operation VVhen it elapsed 45 minutes Accumulated compressor operation time Outdoor heat exchanger sensor TH1 temperature When the temperature has been below 5 C for 3 minutes continuously The difference betvveen the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature e The outdoor air temperature 0 C 7 C or higher e 15 C The outdoor air temperature lt 0 C 4 15 x The outdoor air temperature 7 C or higher The outdoor air temperature lt 15 C 5 C or higher 0 eg g E 5 S B 2 5 S ob amp 1 ES E x S b Ka Defrost operation ES start 15 se E s 5 o 20 20 15 10 5 0 5 10 Outdoor air temperature C During continuous compressor operation In addition when the speed command from the indoor controller of the indoor unit during heating operation has counted 0 rps 10 times or more and all conditions of a b c and e above and the outdoor air temperature is 3 C or less are satisfied note that when the temperature for outdoor heat exchanger sensor TH1 is 5 C or less 62 rps or more 4 C or less less than 62 rps defrost operation is started Ending conditions Operat
52. can operate or stop all units in the group one after another in the order of unit Nol Thermostat and protective function of each unit function independently Note 1 Unit No is set by SW2 on the indoor unit control PCB Unit No setting by SW2 is necessary for the indoor unit only SVV2 For setting of 0 9 A F Outdoor unit Signal wiring between outdoor unit and indoor units Indoor unit Remote controller wiring D Remote controller 2 Unit No may be set at random unless duplicated it should be better to set orderly like 0 1 2 F to avoid mistake Display to the remote controller a Center or each remote controller basis heating preparation the youngest unit No among the operating units in the remote mode or the center mode unless the remote mode is available is displayed b Inspection display filter sign Any of unit that starts initially is displayed c Confirmation of connected units Pressing AIR CON No button on the remote controller displays the indoor unit address If A W button is pressed at the next it is displayed orderly starting from the unit of youngest No d In case of anomaly i If any anomaly occurs on a unit in a group a protective function operates that unit stops with the anomalous stop but any other normal units continue to run as they are ii Signal wiring procedure Signal wiring between indoor and outdoor units should be made on each unit same as the normal wiring
53. conditioner are generated Highly salted area such as beach such as sulfide gas chloride gas acid alkali or ammenic atmospheres Heavy snow area Places exposed to til mist or steam directly Places where the system is affected by n vehicles and ships smoke from a chimney Places where machinery which generates high harmonics isused Altitude over 1000m Do not install the indoor unit in the locations listed below Be sure to install the indoor unit according to the installation manual for each model because each indoor unit has each limitation Locations with any obstacles which can prevent inlet and outlet air of the unit Locations where vibration can be amplified due to insufficient strength of structure Locations where the infrared receiver is exposed to the direct sunlight or the strong light beam in case of the OQ infrared specification unit Locations where an equipment affected by high harmonics is placed TV set or radio receiver is placed within 5m Locations where drainage cannot run off safely lt can affect performance or function and etc Do not put any valuables which will break down by getting wet under the air conditioner S Condensation 02 drop when the relative bumidiy is higher than 80 or drain pipe is Clogged and it damages user s beleagings Do not use the base frame for the outdoor unit which is corroded or damaged after a long period of use t could cause the unit falling down and
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55. for 20 seconds without changing then the speed is reduced again by 4 rps 3 If the discharge pipe temperature is in the range of 90 100 C even when the compressor command speed is maintained for 3 minutes when the temperature is in the range of 90 100 C the speed is raised by 1 rps and kept at that speed for 3 minutes This process is repeated until the command speed is reached 4 Lower limit speed Cooling Heating Lower limit speed 20 rps 30 rps b Ifthe temperature of 110 C is detected by the sensor on the discharge pipe then the compressor will stop immediately When the discharge pipe temperature drops and the time delay of 3 minutes is over the unit starts again within 1 hour but there is no start at the third time Current safe 1 Purpose Current is controlled not to exceed the upper limit of the setting operation current 2 Detail of operation Input current to the converter is monitored with the current sensor fixed on the printed circuit board of the outdoor unit and if the operation current value reaches the limiting current value the compressor command speed is reduced If the mechanism is actuated when the compressor command speed is less than 30 rps the compressor is stopped immediately Operation starts again after a delay time of 3 minutes Current cut 1 Purpose Inverter is protected from overcurrent 2 Detail of operation Output current from the inverter is monitored with a shunt resistor and i
56. imperfection in draining may cause flood indoors and wetting the household goods etc Do not put the drain pipe directly into the ditch where toxic gas such as sulfur the other harmful and inflammable gas is generated Toxic gas would flow into the room and it would cause serious damage to user s health and safety some poisoning or deficiency of oxygen In addition it may cause corrosion of heat exchanger and bad smell Connect the pipe securely to avoid water leakage from the joint nsulate the pipe properly to avoid condensation drop Check if the water can flow out properly from both the drain outlet on the indoor unit and the end of he drain pipe after installation Make sure to make descending slope of greater than 1 100 and do not make up down bend and or rap in the midway In addition do not put air vent on the drain pipe Check if water is drained out properly from the pipe during commissioning Also keep sufficient space for inspection and maintenance 12 SRK T 126 Drain pipe continued Work procedure 1 Make sure to insert the drain hose the end mode of soft PVC to the end of the step part of drain socket Attach the hose clamp to the drain hose around 10mm from the end and fasten the screw within 5mm left to the nut Do not apply adhesives on this end pipe cover big Joint for VP 20 For insulation Prepare on site z Accessory a FEM Ye
57. injury Pay attention not to damage the drain pan by weld sputter when brazing work is done near the unit If sputter entered into the unit during brazing work it could cause damage pinhole of drain pan and leakage of water To avoid damaging keep the indoor unit packed or cover the indoor unit Install the drain pipe to drain the water surely according to the installation manual Improper connection of the drain pipe may cause dropping water into room and damaging user s belongings Do not share the drain pipe for indoor unit and GHP Gas Heat Pump system outdoor unit Toxic exhaust gas would flow into room and it might cause serious damage some poisoning or deficiency of oxygen to user s health and safety Be sure to perform air tightness test by pressurizing with nitrogen gas after completed refrigerant piping work If the density of refrigerant exceeds the limit in the event of refrigerant leakage in the small room lack of oxygen can occur which can cause serious accidents For drain pipe installation be sure to make descending slope of greater than 1 100 not to make traps and not to make air bleeding Check if the drainage is correctly dene during commissioning and ensure the space for inspection and maintenance Ensure the insulation on the pipes for refrigeration circuit so as not to condense water Incomplete insulation could cause condensation and it would wet ceiling floor and any other valuables Do not inst
58. is reduced if the indoor heat exchanger temperature detected with Th R drops to 1 0 C or lower at 4 minutes after the start of compressor operation If the indoor unit heat exchanger temperature is 1 0 C or lower after 20 seconds the compressor speed is reduced further If it becomes 2 5 C or higher the control terminates When the indoor heat exchanger temperature has become as show below after reducing the compressor speed it is switched to the fan operation For the selection of indoor fan speed refer to item 2 Cooling operation 1 0 10 Indoor heat exchanger temperature C Selection of indoor fan speed If it enters the frost prevention control during cooling operation excluding dehumidifying the indoor unit fan speed is switched a When the indoor return air detection temperature detected with Thi A is 23 C or higher and the indoor heat exchanger temperature detected with Thi R detects the compressor frequency drop start temperature A C 1 C of indoor unit fan speed is increased by 20rpm b Ifthe phenomenon of i above is detected again after the acceleration of indoor unit fan indoor unit fan speed is increased further by 20rpm Note 1 Indoor unit fan speed can be increased by up to 2 taps Compressor frequency drop start temperature Symbol A Hem Temperature Low Factory default 1 0 Temperature High 2 5 Note 1 Frost prevention temperature setting can be selected with
59. of plastic parts etc And inflammable gas could cause fire Secure a space for installation inspection and maintenance specified in the manual Insufficient space can result in accident such as personal injury due to falling from the installation place Do not use the indoor unit at the place where water splashes such as laundry S Indoor unit is not waterproof t could cause electric shock and fire Do not use the indoor unit for a special purpose such as food storage cooling for precision instrument preservation of animals plants and a work of art S lt could cause the damage of the items Do not install nor use the system near equipments which generate electromagnetic wave or high harmonics Equipments like inverter equipment private power generator high frequency medical equipment or telecommunication equipment might influence the air conditioner and cause a malfunction and breakdown Or the air conditioner might infiuence medical equipments or telecommunication equipments and obstruct their medical activity or cause jamming Do not install the remote controller at the direct sunlight t codd cause breakdown or deformation of the remote controller Do not install the indoor unit at the place listed below Places where flammable gas could leak Places where cosmetics or special sprays are Places where carbon fiber metal powder or any powder is floated frequently used Place where the substances wich aflect the air
60. of wire Maximun total extension 600m Standard Within 100m x 0 3 mm Within 200m x 0 5 mm Within 300m x 0 75mm Within 400m x 1 25mm Within 600m x 2 0 mm Terminal block 90 N Indoor unit 1 Indoor unit 2 11 Indoor unit 16 Address 0 Address 1 Address F Receiver Remote controller For VRF series set the indoor unit address with SW1 SW2 and SVV5 2 on the indoor unit PCB from 000 to 127 so as not to duplicate Master Slave setting when using plural remote controllers Up to two receivers can be installed in one indoor unit group When two receivers are used it is necessary for a receiver to turn OFF SW2 on the receiver PCB to set it as slave For the method of switching please see Setting on site in the section of OR SACR CUR in this manual 12 SRK T 126 Wireless remote controller s operable area Standard reachable area of the signal condition IIluminance at the receiver 300lux when no lighting is installed within 1m of the receiver in an ordinary office Ceiling surface 20 of the signal 4m 3m 2m im 0 im 2m 3m 4m 2 Correlation between illuminance at the receiver and reachable area of the signal in a plain view The drawing in the right shows the correlation between the reachable area of the signal and illuminance at the re
61. outdoor heat exchanger temperature sensor see the following graph Are the characteristics of outdoor heat exchanger NO temperature sensor OK YES Temperature resistance characteristics 5kQ at 25 C Temperature sensor resistance kQ 0 10 20 30 40 50 Temperature C Correct connector Defective outdoor heat exchanger temperature sensor Replace Defective outdoor PCB Replace Defective outdoor heat exchanger temperature sensor input circuit Note 12 SRK T 126 o Error code Remote controller E38 LED en Red Indoor Keeps flashing Stays OFF Outdoor air temperature sensor anomaly 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Detection of anomalously low temperature resistance on outdoor air temperature sensor 3 Condition of Error displayed When the temperature sensor detects 55 C or lower for 5 seconds continuously within 2 minutes to 2 minutes 20 seconds after the compressor ON the compressor stops After 3 minutes delay the compressor starts again automatically but if this anomalous temperature is detected 3 times within 40 minutes When 55 C or lower is detected for within 20 second after power ON 4 Presumable cause Defe
62. securely so as not to apply unexpected stress on the terminal Loose connections or hold could result in abnormal heat generation or fire e Check the connection of wiring to PCB correctly before turning on the power after replacement Defectiveness of replacement may cause electric shock or fire N CAUTION n connecting connector onto the PCB connect not to deform the PCB It may cause breakage or malfunction e Insert connecter securely and hook stopper It may cause fire or improper running Bundle the cables together so as not to be pinched or be tensioned It may cause malfunction or electric shock for disconnection or deformation 12 SRK T 126 Control PCB PSB012D931F N Replace and set up the PCB according to this instruction Set to an appropriate address and function using switch on PCB Select the same setting with the removed PCB Content of control Address Plural indoor units control by 1 remote controller Test run SW7 1 Normal O Operation check drain motor test run O ON OFF 2 Set to an appropriate capacity using the model selector switch SW6 Select the same capacity with the PCB removed from the unit sw Ta ToTaT41 ON Cancha ave Lol 123 4 Example setting fro 25VF Replace the PCB 1 Fix the PCB so as not to pitch the cords 2 Connect connectors to the PCB Connect a cable connector with the PCB connector of the same colo
63. step pa rt Drain hose 2 N Prepare on site 2 Drain hose Accesso i Connect a Clamp Drain socket Accessory Pipe cover small or insulation Males amp allowed Pipe cover small Dec on site For insulation Accessory Fasten the screw within 5 mm left to the nut Drain socket d Metal elt Hose clamp Drain hose Prepare a joint for connecting VP 20 pipe adhere and connect the joint to the drain hose the end made of rigid PVC and adhere and connect VP 20 pipe prepare on site X As for drain pipe apply VP 20 made of rigid PVC which is on the market Make sure that the adhesive will not get into the supplied drain hose It may cause the flexible part broken after the adhesive is dried up and gets rigid Do not bend or make an excess offset on the drain hose as shown in the picture Bend or excess offset will cause drain leakage H tfo er 20mm Make sure to make descending slope of greater than 1 100 and do not make up down bend and or trap in the midway Pay attention not to give stress on the pipe on the indoor unit side and support and fix the pipe as close place to the unit as possible when connecting the drain pipe Do not set up air vent 1 5m 2m Supporting metal Trapped air will d d am generate noises Fe Air vent m 1 No trap gt Not touching the water Insulation material H AH
64. supply defective communication of circuit 2 times Outdoor control PCB Defective outdoor control PCB on the way of power supply flash Replacement Fuse Blown fuse Defective indoor heat exchanger temperature thermistor defective element broken wire Replacement repair Indoor heat exchanger tempera 57 b short circuit of temperature S 5 ture thermistor 1 time flash Poor contact of temperature thermistor connector thermistor Repla tof Indoor control PCB Defective indoor control PCB Defective temperature thermistor input circuit P S Replacement repair of temperature thermistor Indoor return air temperature Defective indoor return air temperature thermistor defective element broken wire short circuit Keeps thermistor Poor contact of temperature thermistor connector 1 time flash Keeps flashing Repl tof flashing Indoor control PCB Defective indoor control PCB Defective temperature thermistor input circuit i Installation or operating condi tion Heating over load Anomalously high indoor heat exchanger temperature Repair Replacement of Defective indoor heat exchanger temperature thermistor short circuit temperature therm istor Keeps Indoor heat exchanger tempera 1 time flash b flashing ture thermistor Repla tof Indoor control PCB Defective indoor control PCB Defective temperature thermistor input circuit e Replacement repa
65. system protection 1 Starting conditions a When 5 minutes have elapsed after the compressor ON or the completion of the defrost control b Other than the defrost control c When after meeting the conditions of a and b above the compressor speed indoor air temperature Th1 and in door heat exchanger temperature Th2 have met the conditions in the follovving table for 5 minutes Indoor air temperature Th1 Indoor heat exchanger temperature Th2 50 N 10 Th1 40 Th1 4 Th2 50 N 0 Th1 40 Th2 lt Th1 6 Operation mode Compressor speed N Indoor air temperature Th1 Cooling Heating 2 Contents of control a When the conditions of 1 above are met the compressor stops b Error stop occurs when the compressor has stopped 3 times within 60 minutes 3 Resetting condition When the compressor has been turned OFF 12 SRK T 126 10 MAINTENANCE DATA 10 1 Diagnosing of microcomputer circuit 1 Selfdiagnosis function a Check indicator table Whether a failure exists or not on the indoor unit can be know by the contents of remote controller error code indoor unit green LED povver pilot lamp and microcomputer normality pilot lamp or red LED check pilot lamp i Indoor unit Remote controller Indoor control PCB Green Location of trouble Description of trouble Repair method LED 1 Reference page Error code Red LED Red LED Keeps Stays OFF flashing Normal operation No indica
66. the casing It is noise vibration that is generated when the refrigerant gas or liquid flow through inside of piping of air conditioner Itis likely to occur particularly during cooling or defrosting in the heating mode It is normal The noise vibration occurs when the refrigerant starts or stops flowing It is normal When the defrosting starts or stops during heating the refrigerant flow is reversed due to switching 4 way valve This causes a large change in pressure which produces a blowing sound It may accompany also the hissing sounds as mentioned above They are normal After the start or stop of heating operation or during defrosting abrupt changes in temperature cause resin parts to shrink or expand This is normal It is the sound produced by the drain pump that discharges drain from the indoor unit The pump continues to run for 5 minutes after stopping the cooling operation This is normal Apply the damper sealant at places considered to be the sources such as the pressure reducing mechanism expansion valve capillary etc Note 12 SRK T 126 m Error code Remote controller None LED Green Red Indoor Excessive notse vibration 3 3 1 Applicable model 5 Troubleshooting All models 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Diagnosis Counterm
67. the error detection method refer to the protective control by controlling compressor rotation speed and cooling high pressure protective control of micro computer control function for corresponding models 3 Condition of Error displayed When discharge pipe temperature anomaly is detected 2 times within 60 minutes is compressor stop 4 Presumable cause Defective outdoor PCB Defective discharge pipe temperature sensor e Clogged filter Indoor outdoor unit installation spaces Short circuit of air on indoor outdoor units Fouling clogging of heat exchanger Diagnosis Countermeasure For the characteristics of discharge Are the pipe temperature refer to E39 characteristics of discharge pipe temperature NO Replace discharge pipe Sensor normal temperature sensor YES Is the discharge pipe 777 77 YES gt Insufficient refrigerant uring cooling Operation amount Recharge _ refrigerant by weighing proper amount on a scale NO Is the discharge pipe temperature NO Control operation check control normal YES Is the temperature measured actually at detection of NO gt Defective outdoor error correct PCB Replace YES gt Check unit side For the contents of control refer to the protective control by controlling compressor rotation speed and cooling high pressure protective control of micro computer control fu
68. the problems listed below so make sure that you have tightened them If there is a gap remaining between the ceiling and the decorative panel even after the hanging bolts are tightened adjust the installation level of the indoor unit again 8 Please open the lid of a control box 9 Like drain pump wiring please band together by the clamp and put in louver motor wiring into a control box Figure 5 10 Please connect a louver motor connector Figure 5 12 Replace the corner panels Please also close a chain with a screw together then Figure 7 13 Close the intake grill Caution Make sure there is no stress given on the panel when adjusting the height of the indoor unit to avoid unexpected distortion It may cause the distortion of panel or failing to close the air return grille 1 This function is not able to be set with wireless remote controls or simple remote control RCH H3 2 For setting the swing range of other louvers return to 1 and proceed same procedure respectively 12 SRK T 126 0 How to set the airflow direction It is possible to change the movable range of the louver on the air outlet from the wired remote controller Once the top and bottom position is set the louver will swing within the range between the top and the bottom when swing operation is chosen It is also possible to apply setting to each louver 1 Stop the air conditioner and press lil SET button and LOUVER S
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70. 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 3 0 C Remote controller 03 Remote controller thermistor 2 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 2 0 C thermistor at the time 04 Remote controller thermistor 1 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 1 0 C of heating 05 Remote controller thermistor 1 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 1 0 C 06 Remote controller thermistor 2 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 2 0 C 07 Remote controller thermistor 3 0 C At the time of heating in the case of remote controller thermistor enabled offset temperature at 3 0 C 01 No ventilator connection O 01 Indoor unit fan speed Ventilation setting In case of Single split series by connecting ventilation device to CNT of the indoor printed circuit board in case of VRF series by 02 Ventilator links air conditioner connecting it to CND of the indoor printed circuit board the operation of ventilation device is linked with the operation of indoor unit Auto operation 01 Auto operation enabled X Note 1 setting 02 Auto operation disa
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72. 0m change to the size below But the wiring in the remote controller case should be 0 3mm recommended to 0 5mm Change the wire size outside of the case according to wire connecting Waterproof treatment is necessary at the wire connecting section Be careful about contact failure 100 to 200m 0 5mm X 2 cores 0 75mm X 2 cores 1 25mm X 2 cores Under 300m Under 400m Under 600m 2 0mm X 2 cores 106 Sheath Peeling length Unit mm Adapted to RoHS directive 12 SRK T 126 In case of exposing cord Simple Remote Controller Installation Manual Read together with indoor unit s installation manual NWARNING Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal Loose connection or hold will cause abnormal heat generation or fire Make sure the power supply is turned off when electric wiring work Otherwise electric shock malfunction and improper running may occur A CAUTION DO NOT install the remote controller at the following places in order to avoid malfunction 1 Places exposed to direct sunlight 4 Hot surface or cold surface enough to generate condensation 2 Places near heat devices 5 Places exposed to oil mist or steam directly 3 High humidity places 6 Uneven surface DO NOT leave the remote controller without the upper case In case the upper cace needs to be detached
73. 12 SRK T 126 m Error code LED Green Red Content Indoor Keeps flashing Stays OFF Compressor startup failure 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method If it fails to change over to the rotor detection operation of compressor motor 3 Condition of Error displayed If compressor fails to startup for 42 times 4 Presumable cause Faulty outdoor fan motor Faulty outdoor PCB Anomalous power supply voltage Improper refrigerant amount and refrigerant circuit Faulty compressor Motor bearing Compressor does not start at all Disconnect the outdoor fan motor Neither noise nor vibration cannot be heard connector and try to startup the pressure balance at starting OK insulation resistance and coil resistance of compressor OK Is he output of inverter checker OK Does compressor startup Is power supply voltage OK Is power transistor module OK YES NO NO NO NO Note Several times restarting Try to startup several times may resolve it because migrated liquid refrigerant in the compresser is discharged from Does it start the compressor NO Replace outdoor fan motor Check power supply voltage Check refriger
74. 18 to 26 C 62 to 79 F When you set upper and lower limit by this function control as below 1 2 When 2TEMP RANGE SET remote controller function of function setting mode is INDN CHANGE factory setting If upper limit value is set 1 During heating you cannot set the value exceeding the upper limit If lower limit value is set 1 During operation mode except heating you cannot set the value below the lower limit When 2 TEMP RANGE SET remote controller function of function setting mode is NO INDN CHANGE If upper limit value is set During heating even if the value exceeding the upper limit is set upper limit value will be sent to the indoor unit But the indication is the same as the temperature set If lower limit value is set During except heating even if the value lower than the lower limit is set lower limit value will be sent to the indoor unit But the indication is the same as the temperature set Q How to set upper and lower limit value 1 E cm Itis possible to finish by pressing TEMP RANGE l During setting if you press Z Stop the air conditioner and press SET and MODE button at the same time for over three seconds The indication changes to FUNCTION SET Press Y button once and change to the TEMP RANGE A indication Press SET button and enter the temperature range setting mode Select UPPER LIMIT Y or LOWER LIMIT A by using
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76. 6 3 ELECTRICAL WIRING 1 Indoor units Models FDTC25VF 35VF 0001 eut eoinos amod plsBuo g aul Je oJAuoo eyouueJ uey aow 51 yua 210 eut rej eseo l 10 19908 nd jou oq s 0905 889 au JeJ o 1U09 9 0 Fe ZX WLUE 0 SJqeo 8100 uW SN b jun pisino pue jun episul an ueameq auij BU oqe jun pisino Jo Wesel Buum 34 ees ef NO 011u09 otu9 1ueuuno 10 000 Eug 34 51 281 pue D u KR lun pue Jun i a us ml q sul Bujdsuu0d jueuuno Anesy 01000 euiuuJe SU s LAL Z A 4 n x n ois uo Buum sepeoipul SON 3 yg X 3 08 102 eejjjo nduruorejedo ejouleg GHX yg X t ER ES Wie v uojoedsul TUX s a X3 z S No Jossaxtwog T eux r s m Hl x ZEX 2100 O PSU uon
77. 6 is the most downward position is to return to the factory setting H you need to change the setting to the default setting use position T the most horizontal 7 Press BB SET button i in of the upper limit position The upper limit position is fixed and the setting position is displayed for two seconds Then proceed to lower limit position selection display the position of the louver Wo UPPER displayed for two seconds Mo LINERS shows current setting B Pross A or V button Selection of lower limit position Select the lower limit position of louver position 1 is the most horizontal and position 6 is the most downwards position is to return to the factory setting H you need to change the setting to the default setting use position Me LONER the most horizontal L MER return to the detaut setting 9 Press BB SET button i in of the lower limit position Upper position and lower limit position are fixed and the set positions are original position to the lower limit position and goes back to the original position again This operation is not performed if the indoor unit and or indoor unit fan is in operation EXAMPLE MIU displayed for two seconds SET COMPLETE 5201 A 10 Press coworr button Louver adjusting mode ends and returns to the orginal display H the upper limit position number and the lower limit position number are set t
78. 70 5 9 127 60 X GE EE 60 CAL NEN MB CMS si N60 3 Es g e lcm m N Cl PSG Ncc LL 1 S450 E 50 o f C J 57 G ff De 0 Fare 0 J de F E g x Sk N Oen o CT EL Yaxa C T SEE d SO 40 E 40 Ag E J o d BB b Tuo VELO 99h o COUESSSSA 0 E SS 1 a L WS US r 1 5 230 F 3 30 L 2 E 20 E 20 E sess N20 10 E i 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz 12 SRK T 126 Model FDTC35VF ISO T1 JIS C9612 Indoor Unit Model FDTC35VF Noise 41 dB A Level 43 dB A standard 2x107 Pa Sound Pressure Level dB 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz Outdoor Unit Model SRC35ZJX S Noise 50 dB A Level 50 dB A X ce Cooling O Heating 70 K m TERT yn 70 ee ale EE N70 1 60 Li 5 fe ef ep 1 60 CAMERA Pi ce 1 S 50 4 50 Y a J AS UR BA 40 Xo 40 o E j a 3 os E 8 2 30 30 o un 20 20 10 10 63 125 250 500 1000 2000 4000 8000 Mid Octave Band frequency Hz 12 SRK T 126 5 PIPING SYSTEM Models FDTC25VF 35VF Cooling cycle Heating cycle Flare Outdoor unit Outdoor air connection temp sensor Service valve Indoor unit
79. 7324 ay ye ss u1uB Jre 10 p31s8 ueeq eAeu seAjasulau SuN 100pu pue nouliy 1 EL eJnjeJedue Weg ug au UIYM 910 10902 Is ss ulufin diy G pin6 e se 9091 119 Jauueds e y m pap ded ay pjou 70u oq 002 Sp 0e ZP 46 266 ay usn 1 ulni 4 UUH UAY pue 1511 Ajjenuew 1nu 9Jejj au uajsej ojqejieAe 104 SI anbJo e j uouaJM nbi0 V sn 091 09 Gt 8L vl vi 5690 ww ejpueu 100 e jo l u papuawwosay albue Buruy i IN nbio DuiuejuDij ww ezis aA e uonejado nbio Duiuejsej ayeiidoudde HulAjdde way uajsej u u pue Jy au uo Dap Spil se S lpoq UPW AJLA aui 1e S N PA uomejedo 586 pue pinbil uloq XIJ uonensen 9 nu sipi ay ur anbso Gujuaysey sadosd puo ag 3340 Ajdde jou oq NOILNYI V 12 SRK T 126 uw aim 19ddo3 jo uonoes 1010npuo9 uua ay SI 9 099 ay jo Jojonpuoo 90 5 s10 0Npuo9 JO JaqWNN Glo 9103 papuelS H uoneinsul s1ojonpuoo 1 qqni 0 9 N uomneinsul 900 uju s Jo pue jeunyeyy SHOA 006 002 50 d lqp peziuouueH H 1903192 40 ldulex4 2 9 se qeo pial sejqeo 10 epo 2313N32 S H eui JO Duiuesoo prone 0 ULAN uonoeuuooJejul 10 59 082 es syuijq due sawi y pue uo suan dwe uni ay su pue sdojs pun Joo
80. B Float switch setting error Humidifier DM interlock setting error Optional equipment setting error Drain piping error Defective drain motor Disconnection of drain motor wiring Check the error data in the remote controller Is there any overflow Is the humidifier connected YES YES Isthe humidifier Drain Motor interlocked by the indoor unit function NO Is the CNI connected firmly Is there any anomaly on the optional equipment NO NO gt setting of remote controller YES Drain motor ON from the remote controller Does DM operate YES Is the drain piping unclogged Is the drain pipe slop OK NO YES Defective indoor control PCB gt Replace Defective indoor control PCB gt Replace Check optional equipment Correct setting to Humidifier DM interlock Defective indoor povver PCB gt Replace Check wiring of drain motor Correct Check drain motor Note When this error occurred at power ON disconnection of wire or connector of the float switch is suspected Check and correct it or replace it if necessary 12 SRK T 126 2 Error detection method When it detects more than 17 of indoor units connected to one remote contorller 3 Condition of Error displayed
81. B e Defective outdoor control PCB Defective temperature sensor input circuit Discharge pipe temperature Defective discharge pipe temperature sensor broken wire or poor connector of temperature sensor connection sensor Replacement of PCB Replacement of PCB Outdoor control PCB Defective outdoor control PCB Defective temperature sensor input circuit Outdoor control PCB compressor le Current cut Anomalous compressor over current Installation operation status Service valve closing operation Repair Repair Outdoor control PCB Defective active filter PCB replacement Fan motor Defective fan motor Replacement 89 Outdoor control PCB Defective outdoor control PCB Power transistor error outdoor Replacement of Power transistor error control PCB PCB Operation status Shortage in refrigerant quantity Repair Service valve Installation status Service valve closing operation opening check Overload operation Overcharge Current safe stop Replacement 92 Compressor locking Compressor outdoor control PCB Anomalous compressor startup 777777 Note 1 mark in the Description of trouble means that in ordinary diagnosis it cannot identify the cause definitely and if the trouble is repaired by replacing the part it is judged consequently that the replaced part was defective 12 SRK T 126 iii Display sequence of error codes or inspection indicator lamps
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83. C with the heating thermostat OFF the indoor fan is turned OFF The same applies also when the remote controller sensor is effective Filter sign As the operation time Total ON time of ON OFF switch accumulates to 180 hours 1 FILTER CLEANING is displayed on the remote controller This is displayed when the unit is in trouble and under the centralized control regardless of ON OFF Note 1 Time setting for the filter sign can be made as shown below using the indoor function of wired remote controller FILTER SIGN SET It is set at 1 at the shipping from factory Setting time 180 hrs Factory default Setting time 600 hrs Setting time 1 000 hrs Setting time 1 000 hrs Unit stop 2 2 After the setting time has elapsed the FILTER CLEANING is displayed and after operating for 24 hours further counted also during the stop the unit stops Auto swing control 1 Louver control a Press the LOUVER button to operate the swing louver when the air conditioner is operating SWING Z is displayed for 3 seconds and then the swing louver moves up and down continuously b To fix the swing louver at a position press one time the LOUVER button while the swing louver is moving so that four stop positions are displayed one after another per second When a desired stop position is displayed press the LOUVER button again The display stops changes to show the STOP 1 for 5 sec
84. D ndoor unit with two or three step of air flow setting unction06 do 1821 INVALID ndoor unit with only one of air flow setting Remote controller E2 LOLIMER SW GE VALID ndoor unit with automatically swing louver unction07 GEZ INVALID ndoor unit without automatically swing louver Remote controller L U FAN HI MID LO ndoor unit with three step of air flow setting unction13 HI LO indoor unit with two step of air flow setting HI HII 1 FAN SPEED ndoor unit with only one of air flow setting Remote controller MODEL TYPE HEAT PUMP Heat pump unit unction15 COOLING ONLY Exclusive cooling unit Note 3 As for plural indoor unit set indoor functions to each master and slave indoor unit But only master indoor unit is received the setting change of indoor unit function 05 EXTERNAL INPUT and 06 PERMISSION PROHIBISHION From previous page Note2 Fan setting of HIGH SPEED Indoor unit No are indicated only when Eer Indoor unit air flow setting Indoor unit function LAU FUNCTION a plural indoor units are connected P Bail Sad San Seil dean St Sai Seat Se Sal Sei Function 2 STANDARD UH HI Me Lo Hi Me Lo Hi Lo Hi Me FAN SPEED SET setting SCH i STANDARD X SET HIGH i i i HIGH SPEED T K SPEED 2 UH UH Hi Me UH Hi Me UH Me UH Hi HIGH SPEED 2 INDICATION OFF Q nitial function setting of some indoor unit is
85. Display the indoor unit number connected to this remote controller CHECK button This button is used at servicing TEST button This button is used during test operation SET button This button is used to fix the setting This button is used to set the silent mode RESET button Press this button while making settings to go back to the previous operation This button is also used to reset the FILTER CLEANING display Press it after cleaning the air filter All displays are described in the liguid crystal display for explanation 12 SRK T 126 9 2 Operation control function by the wired remote controller a Switching sequence of the operation mode switches of remote controller r DRY COOL gt FAN gt HEAT na XL N 1 m as Ze b CPU reset This functions when CHECK and ESP buttons on the remote controller are pressed simultaneously Operation is same as that of the power supply reset c Power failure compensation function Electric power supply failure sooner than normal state is recovered after the power This becomes effective if Power failure compensation effective is selected with the setting of remote controller function Since it memorizes always the condition of remote controller it starts operation according to the contents of memory no failure Although the auto swing stop position and the timer mode are cancelled the weekly timer setting
86. HIGH SPEED 4 speed is not able to be set with wireless remote controller 03 FILTER SIGN SET The filter sign is indicated after running for 180 hours The filter sign is indicated after running for 600 hours The filter sign is indicated after running for 1000 hours The filter sign is indicated after running for 1000 hours then the indoor unit will be stopped by compulsion after 24 hours If you change the indoor function 04 POSITION you must change the remote controller function 14 POSITION accordingly You can select the louver stop position in the four The louver can stop at any position To set other indoor unit press AIRCON NO button which allows you to go back to the indoor unit selection screen for example I U 000 A 04 POSITION APUSTTTUM STOP FREE STOP LEVEL INPUT PULSE INPUT INVALID VALID INVALID VALID OFFSET 3 0 OFFSET 4206 OFFSET 1 0 NO OFFSET 05 EKSTERNAL INPUT 06 OPERATICN FERMISSIONFROHIEITICN Permission prohibition control of operation will be valid 07 EMERGENCY STOP With the VRF series it is used to stop all indoor units connected with the same outdoor unit immediately When stop signal is inputed from remote on off terminal 6 all indoor units are stopped immediately To be reset for producing 3 0 C increase in temperature during heating T
87. I AOSZ 7 INVANO sfz 19107A 1 E H r zo T T T VI AOSC 4 Wyd m ek A AN I I HA E wul 9L z N A YOZ AOST ASION ZHOS T a mu E ae Lep se seyd I ee 24 E NIH YSI AOSZ 1 I T 3mos i YEAOd ZL LL b s U ID AO IS A D A XSSV 8d et Ee ee AO 2A X S DR HA Ke pou qu us yun Joopuy 3 BeyoA 1ndino 489 pue Tuut u lseJ oui IAUN S JojsisueJ Jamod uonoedsu sprig KI STA a wm um cf 1105 peddojs st run v JOYE 107 xoq o1juoo oY ur syed peoroo o Yono 4uoq OUD y ur psonpold et eyoA uar 49V110A H H NOILNVO 12 SRK T 126 10 2 Troubleshooting flow 1 List of troubles 3 None Earth leakage breaker activated 59 3 None Excessive noise vibration 2 3 61 e o Power sappy stem or ower sappi 1o ooroo re To o ww Power supply system enor Power supiy 7 10 msecruu INSPECT VU When e BERENS m s fowom 5 9 s m ln 2 Troubleshooting Error code Remote controller None LED Green Red Content Indoor Keeps
88. MP button Use to raise the setting temperature TEMP button Use to lower the setting temperature Operation mode display lt lt Fan operation bei Heating Auto mode Central control display Displayed when controlling the unit with the central controller oo g EEIE ONS BIET ony FAN am near y EB D Er Auro H EDD 5 ON OFF C o AIR CON No Remote controller sensor 000 g Indoor unit display Control disable display The lamp is lit for 3 seconds when a disabled button is pressed Installation of remote controller DO NOT install the remote controller at the following places in order to avoid malfunction 1 Places exposed to direct sunlight 2 Places near heat devices 3 High humidity places 4 Hot surface or cold surface enough to generate condensation 5 Places exposed to oil mist or steam directly 6 Uneven surface 105 ON OFF button Button to start stop the air conditioner FAN SPEED button Button to set the fan speed AIR CON No button Indicates the No of air conditioner which is connected VRF series outdoor unit No display DO No LAS Fan speed display Ventilation display This is lit during the ventilation
89. Manual No 12eSRK T 126 TECHNICAL MANUAL INVERTER RESIDENTIAL AIR CONDITIONERS Split system air to air heat pump type Ceiling cassette 4vvay compact type FDTC25VF FDTC35VF MITSUBISHI HEAVY INDUSTRIES LTD 12 SRK T 126 CONTENTS T ei ei un Lei KE 3 EXTERIOR DIMENSIONS xu LA R A ad da 5 WEE 5 M eaaa 5 2 Outdoor UNIS on aaa nan 6 3 Wired remote ENEE tee 7 3 ELECTRICAL WIRING 8 1 HGDOPunm E erc 8 61 ssa ii 9 E elc di lu Acc 10 5 PIPING SYSTEM ra ba ADA AA b 12 6 RANGE OF USAGE amp LIMITATIONS 13 Te ei eh ee 15 8 APPLICATION DATA 16 Installation of indoor unit 16 8 2 Installation of outdoor unit 22 9 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 29 9 1 Wired remote controller option parts 29 9 2 Operation control function by the wired remote controller 30 9 3 Operation control function by the indoor controller 31 9 4 Operation control function by the outdoor controller 40 10 MAINTENANCE DATA
90. O gt Minor clogging of filter speed low Minor clogging of heat exchanger YES Minor short circuit 1 Minor shortage of Check which control Determination refrigerant amount control of conpressor rotation speed or Poor compression of Protective control by controlling compressor compressor rotation speed is appropriate to this phenomenon A 4 P bl Considering appropriate Fresumable cause operation control check suspicious points Poor compression of Are the i 1 7 the followings for Temperature conditions reference compressor of room and outdoor air close YES Faulty expansion valve to the rated Major clogging of filter operation conditions Major clogging of heat Note 1 Outdoor 35 C Indoor 27 C exchanger NO Major short circuit Major shortage of The unit is operating normally but is refrigerant amount operating under the contol for protecting Compressor protection ON compressor or other respective parts ndoor fan tap Note 12 SRK T 126 m Error code Remote controller None LED Green Red Content Indoor Keeps flashing Stays OFF Operates but does not heat 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Check the indoor unit fan operation Check the temperature differnce between return and supply air
91. ON YES NO Defective indoor control PCB Defective SVV7 Replace Turn SVV7 1 on the indoor control PCB OFF and reset the povver Note 12 SRK T 126 o Error code Remote controller E28 LED fen Red Remote controller Indoor Ren fali Says 095 temperature thermistor anomaly J 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Detection of anomalously low temperature resistance of remote controller temperature thermistor Thc 3 Condition of Error displayed When the temperature thermistor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minutes delay the compressor starts again automatically but if this error occurs again within 60 minutes after the initial detection 4 Presumable cause Faulty connection of remote controller temperature thermistor Defective remote controller temperature thermistor Defective remote controller PCB Is the remote controller temperature thermistor NO Correct connected properly YES Are the characteristics of o v aa NO Defective remote controller Is the thermistor wire temperature thermistor 1 Replace YES Defective remote controller PCB gt Replace Defective remote controller temperature thermistor input ci
92. ON NO button for over 5 seconds 88 blinks on the temperature setting indicator 88 blinks for approximately 2 seconds while data is read 1 Then the return air temperature is displayed d 1 Example return air temperature 27 C blinking Note For the return air temperature in the normal case the return air temperature of the indoor unit is displayed however in the case that the remote control thermistor is effective detected temperature by the remote controller thermistor is displayed 2 Press b ON OFF button End In the case that the remote thermistor is ineffective and plural indoor units are connected to one remote controller 1 Press AIR CON NO button for over 5 seconds indoor unit No indicator U 000 blinking Among the connected indoor units the lowest number is displayed Press TEMPA or TEMP button Select the indoor unit No Press lt MODE button Dectder the indoor unit No Example indoor unit No indicator U 000 88 blinks on the temperature setting indicator blinking for approximately 2 to 10 seconds while data is read Then the return air temperature is displayed When AIR CON NO is pressed return to the indoor unit selection display example U 000 Press 1 ON OFF button End 108 12 SRK T 126 Function setting
93. POSITION in the same way 4 Individual flap louver control system The individual flaps louvers for 4 directions can be controlled to swing within the ranges between upper limit and lower limit selected with wired remote controller respectively For detail setting method refer to in page 21 Note 1 This function is not able to be set with wireless remote controller or simple remote controller RCH E3 Compressor inching prevention control 1 3 minute timer When the compressor has been stopped by the thermostat remote controller operation switch or anomalous condition its restart will be inhibited for 3 minutes However the 3 minute timer is invalidated at the power on the electric power source for the unit 2 3 minute forced operation timer Compressor will not stop for 3 minutes after the compressor ON However it stops immediately when the unit is stopped by means of the ON OFF switch or by when the thermister turned OFF the change of operation mode Ifthe thermostat is turned OFF during the forced operation control of heating compressor the louver position with the auto swing is returned to the level position Note 1 The compressor stops when it has entered the protective control Drain motor 1 Drain motor DM is operated during the cooling or dehumidifying mode operations and simultaneously with the compressor ON The DM continues to operate for 5 minutes after the operation stop anomalous stop thermostat s
94. RAIN PUMP LINK Drain pump is run during cooling and dry Drain pump is run during cooling dry and heating Drain pump is run during cooling dry heating and fan Drain pump is run during cooling dry and fan 32 FAN REMAINING After cooling is stopped the fan does not perform extra operation After cooling is stopped the fan perform extra operation for half an hour After cooling is stopped the fan perform extra operation for an hour After cooling is stopped the fan perform extra operation for six hours 356 FAN REMAINING After heating is stopped or heating thermostat is OFF the fan does not perform extra operation After heating is stopped or heating thermostat is OFF the fan perform extra operation for half an hour After heating is stopped or heating thermostat is OFF the fan perform extra operation for two hours After heating is stopped or heating thermostat is OFF the fan perform extra operation for six hours 355 FAN INTERMITTENCE NO REMAINING IEF sminDN During heating is stopped or heating thermostat is OFF the fan perform intermittent operation for five minutes 7 with low fan speed after twenty minutes OFF During heating is stopped or heating thermostat is OFF the fan perform intermittent operation for five minutes with low fan speed after five minutes OFF sini HOFF smi n l STANDARD x TYPEL x 17 PRESSURE CONTROL Connected OA Processing
95. Same as above 4 Presumable cause Excessive number of indoor units connected Defective remote controller o H5 15 Red Excessive number of connected Remote controller E10 indoor units more than 17 units Indoor Keeps flashing Stays OFF by controlling with one remoto controller U 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure Aren t more than 17 indoor units connected to one NO gt Defective remote controller remote controller Rep lace YES l Reduce to 16 or less units Note 12 SRK T 126 o Error code Remote controller E16 LED en Red Indoor Keeps flashing Stays OFF Indoor fan motor anomaly 1 Applicable model 5 Troubleshooting All models 2 Error detection method Detected by rotation speed of indoor fan motor 3 Condition of Error displayed When actual rotation speed of indoor fan motor drops to lower than 200rpm for 30 seconds continuously the compressor and the indoor fan motor stop After 2 seconds it starts again automatically but if this error occurs 4 times within 60 minutes after the initial detection 4 Presumable cause Defective indoor power PCB Foreign material at rotational area of fan propeller Defective fan motor Dust on control PCB Blown fuse External noise surge Diagnosis Countermeasure D
96. TRIES LTD Air Conditioning amp Refrigeration Systems 16 5 Konan 2 chome Minato ku Tokyo 108 8215 Japan http www mhi co jp Because of our policy of continuous improvement we reserve the right to make changes in all specifications without notice Copyright MITSUBISHI HEAVY INDUSTRIES LTD
97. ained in the following way Net capacity Capacity shown on specication x Correction factors as follows 1 Coefcient of cooling and heating capacity in relation to temperatures Min 3 minutes 1 3 o 1 2 lt gt 3 Cooling z4 e i L T Q Tn z 585 10 I ego en Heating 2 ce 09 1 SES 4 m p f 985 08 ore Pid 0 7 0 6 Applicable range 5165 46 ia o 5 ad 40 Q S IS 556 s E SES 25 Id 26 582 20 24 olo 0 l 5 1 Depends on installed situation 10 15 14 16 18 20 22 Sm Indoor air W B temperature C WD ISO T1 Standard Condition Sin 5 27 ol a Q EG 25 oe SO 20 Che LIS ES 15 L 4129 10 15 10 5 0 5 10 15 150 1 Standard Condition Outdoor air W B temperature C W B 13 12 SRK T 126 2 Correction of cooling and heating capacity in relation to one way length of refrigerant piping It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor units Piping length m Cooling Heating 1 0 1 0 1 0 1 0 1 0 1 0 3 Correction relative to frosting on outdoor heat exchanger during heating In additions to the foregoing corrections 1 2 the heating capacity needs to be adjusted also with respect to the frosting on t
98. ake grille can also be attached in a rotated position by 90 degrees In case the orientation of the panel is not correct it will lead to air leakage and also itis not possible to connect the louver motor wiring Hm Y TEN HHI qul 3 Removing a corner panel Unscrew the screw from the corner area pull the corner panel toward the direction indicated by the arrow mark 12 SRK T 126 PJA012D783 N 4 Attaching a corner panel First insert the part a of a corner panel into the part A of the cover panel engage two Panel installation Install the panel on the unit after completing the electrical wiring For fixing temporarily 4pieces Forhoisting the panel 1 piece For attaching a hook 2 pieces For attaching a chain 1 Screw in two bolts out of the four supplied with the panel by about slightly less than 5mm mark AE Figure 1 Figure 1 2 Attach the hook supplied with the panel to the main body with the hook fixing screw 1 screw Figure 2 3 Open the intake grille 4 Please remove the screw of a corner panel and remove a corner panel four places 5 A panel is hooked on two bolts 6 mark 0 8 Figure 3 6 Please rotate a hook put in the slot on the panel and carry out fixing the panel temporarily Figure 4 7 Tighten the two bolts used for fixing the panel temporarily and the other two Caution Improperly tightened hanging bolts can cause
99. all the outdoor unit where is likely to be a nest for insects and small animals Insects and small animals could oome into the electronic components and cause breakdown and fire Instruct the user to keep the surroundings dean Pay extra attention carrying the unit by hand Carry the unit with 2 people if it is heavier than 20kg Do not use the plastic straps but the grabbing place moving the unit by hand Use protective gloves in order to avoid injury by the aluminum fin Make sure to dispose of the packaging material o Leaving the materials may cause injury as metals like nail and woods are used in the package Do not operate the system without the air filter Q t may cause the breakdown of the system due to clogging of the heat exchanger Do not touch any button with wet hands OQ t could cause electric shock Do not touch the refrigerant piping with bare hands when in operation OQ The pipe during operation would become very hot or cold according to the operating condition and it could cause a burn or frostbite t could cause electric shock Be sure to wait for more than 5 minutes Otherwise it could cause water leakage or breakdown Do not contro the operation with the circuit breaker S lt could cause fire or water leakage In addition the fan may start operation unexpectedly and it may cause injury Before installation Install correctly according to the installation manual Confirm the following points O
100. ant amount and refrigerant circuit Repalce compressor Defective outdoor PCB Replace Defective outdoor PCB Replace Repalce compressor Note Insulation resistance The unit is left for long period without power supply or soon after installation migrated liquid refrigerant may dissolve in the refrigerant oil in the compressor In such case insulation resistance decreases upto several MQ or lower If the electric leakage breaker is activated due to low insulation resistance check followings Check whehter the insulation resistance can recover or not ater 6 hours has passed since power ON By energize the crankcase heater migrated liquid refrigerant in the refrigerant oil in compressor can be evaporated Check whether the electric leakage breake conforms to high hermonic specifications As units has inverter in order to prevent from improper operation be sure to use high hermonic one 12 SRK T 126 m Remote controller E60 LED Green Red Indoor Keeps flashing Stays OFF Compressor rotor lock error 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Compressor rotor position 3 Condition of Error displayed If it fails again to detect the rotor position after shifting to the compressor rotor position detection operation the compressor stops 4 Presumable cause
101. are connection as follows Make sure to loosen the flare nut with holding the nut on pipe side with a spanner and giving orque to the nut with another spanner in order to avoid unexpected stress to the copper pipe and then remove them When fastening the flare nut align the refrigeration pipe with the center of flare nut screw the nut for 3 4 times by hand and then tighten it by spanner with the specified torque mentioned in the table below Make sure to hold the pipe on the indoor unit securely by a spanner when ightening the nut in order to avoid unexpected stress on the copper pipe 3 Cover the flare connection part of the indoor unit with attached insulation material after a gas leakage inspection and tighten both ends with attached straps Make sure to insulate both gas pipes and liquid pipes completely X Incomplete insulation may cause dew condensation or water dropping 4 Refrigerant is charged in the outdoor unit As for the additional refrigerant charge for the indoor unit and piping refer to the installation manual attached to the outdoor unit Sap Accesso 1y Pipe cover Accessory Pipe diameter Tightening torque N m 5 07 6 35 140 18 9 52 34 to 42 t 1 12 7 49 to 61 0 15 88 68 to 82 100 to 120 Te thickness of insulation shoulbe 20mm or more nstall the drain pipe according to the installation manual in order to drain properly
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103. asodsip o pue ueJpiiuo Woy Aeme soddeim onsejd oun dee o eq uogeooyins jo JeBuep piore puy poom pue sjeu suirejuoo y se Anfu feuosied esneo ueo speuejeuu Buryoed BuiureueJ Auy sjenozew Bur4oed Aue jo asodsiq sui uunutunje v Aq sino jo YSU y zltulului O se ojB esf puey Aq yun y Buikueo usym ejpueu Aueo eui esn seme sdeujs onsejd eui Aq Aueo jou oq suosjed JO OM q peuueo eg 1snuu qi uey S uBI A yun eu JI puey Aq un eui Buleo u uA e eoe d uonejejsur eu woy Burey o np Anfu yeuosued se uons 1uepiooe ul 1 594 ueo eoeds jueroyinsu enuew y ui payloads eoueuejureui pue uornoedsur uonejejsur 10 eoeds e eJnoeg e peunoes eq pjnoys syed je ou UE wo eoueJeo o Aqess u eu pue Sulu pue 9jejs 60161 1194 0 eq pinoys yil eui pue s n UE eoueuojuleui H pue sepoo E20 eut ui eouepJoooe ut bulu Ajddns amod ay uo uols 129euuoosip 40 10 e OSI JE3SU e SOUS oujo9je esneo ULI 1 pejejsul 104 si 1exeeuq eDexee uuee y J paesu eq 1snui Jayee1q o6e xeo yez ou pue uonouniiguui pun v osneo ued y Aloedeo Bupjeeuq 1ueroyjns eeu JOU SBOP 1e eeJq eui JI Aoede BurjeeJq lu loujJns YPM PNI v esf e NOLLNVO V 12 SRK T 126 uonoanp pulu Pum au jo uonoeJip au oj spin rpu di d
104. at Polyurethane form Electric heater w Remote controller wired RC E5 RC EX1A option wireless RCN TC 24W ER option Room temperature control Thermostat by electronics Safety equipment Overload protection for fan motor Internal thermostat for fan motor Frost protection thermostat Abnormal discharge temperature protection Installation data Liquid line I U 6 35 1 4 Pipe 6 35 1 4 x 0 8 O U 6 35 1 4 Refrigerant piping size Gas line 9 52 3 8 q 9 52 3 8 x 0 8 q 9 52 3 8 Connecting method Flare piping Flare piping Refrigerant line one way length Max 15m Vertical height difference between outdoor unit and indoor unit Max 10m Outdoor unit is higher Max 10m Outdoor unit is lower Refrigerant Quantity Drain pump R410A 1 2kg in outdoor unit incl the amount for the piping of 15m Built in Drain pump Drain Hose Connectable with VP20 Insulation for piping Necessary Both liquid amp Gas lines Standard Accessories Mounting kit Drain hose Drain elbow Drain hole grommet Notes 1 The data are measured at the following conditions when the air flow is high mode 2 This packaged air conditioner is manufactured and tested in conformity with the ISO 3 Sound pressure level indicates the value in an anechoic chamber During operation these value are somewhat higher due to ambient temperature 4 The operation data i
105. atically by the indoor unit connected when remote controller and indoor unit are connected As long as they are used in a typical manner there wiil be no need to change the initial settings If you would like to change the initial setting marked O set your desired setting as for the selected item The procedure of functional setting is shown as the following diagram Flow of function setting Start Stop air conditioner and press 777 7 SET and Record and keep the T MODE buttons at the same time for over three seconds setting Finalize Press O SET button Reset Press 2 RESET button Select Press A Y button End Press ON OFF button Consult the technical data etc for each control details It is possible to finish above setting on the way and unfinished change of setting is unavailable O Initial settings x Automatic criterion FUNCTION Y Remo Function 01 bivl ESP SET e controller function setting Stop air conditioner and press 12 SRK T 126 C2 SET Cx MODE buttons atthe same time for over three seconds FUNCTION SET Y mur ob VALID O validate setting of ESP External Static Pressure Invalidate setting of ESP Automatical operation is impossible Temperature setting butt
106. ayed 6 Error records can be cleared by transmitting a STOP command from the wireless remote controller while the backup button is pressed 102 gt Exterior dimension Cem MITSUBISHI HEAVY INDUSTRIE SG ON OFF s FAN SPEED AIR FLOW MODE FILTER 60 150 17 103 12 SRK T 126 12 SRK T 126 AIR FLOW display Indicates the status of swing louver OPERATION MODE display Indicates selected operation with Il 22 S Indication section ROOM TEMP display Indicates set temperature FAN SPEED display Indicates the selected airflow volume FILTER display Indicates for two seconds when FILTER button is pressed II r ON TIMER display zl C ov Indicates when ON TIMER is set MED ID H HH ON TIMER setting time display LO II LEN IL iLi Li Indicates when OFF TIMER is set Indicates the ON TIMER setting time OFF TIMER display Nothing displayed when ON TIMER is 2 not set OFF TIMER setting time display Indicates OFF TIMER setting time Indicates the current time when the OFF TIMER is not set Operation section Transmitter Sends signal to the air conditioner inl ON OFF button VVhen this is pressed once the unit starts to operate and vvhen this is pressed once again it stops operating
107. bled X Note 1 Auto operation disabled Operation permission 01 Disabled O prohibition 02 Enabled Operation permission prohibition controller is enabled 01 Level input O 02 Pulse input 01 Standard Fan speed setting 02 High speed 1 03 High speed 2 01 remaining operation After cooling stopped no fan remaining operation ting 02 0 5 hours After cooling stopped fan remaining operation for 0 5 hours of cooling 03 1 hour After cooling stopped fan remaining operation for 1 hour 04 6 hours After cooling stopped fan remaining operation for 6 hours m 01 No remaining operation After heating stopped or after heating thermostat OFF no fan remaining operation 01 ilm 02 0 5 hours After heating stopped or after heating thermostat OFF fan remaining operation for 0 5 hours of heating 03 2 hours After heating stopped or after heating thermostat OFF fan remaining operation for 2 hours 04 6 hours After heating stopped or after heating thermostat OFF fan remaining operation for 6 hours 01 No offset 15 02 Setting temperature offset 3 0 C The setting temperature at the time of heating is offset by 3 0 C heating 03 Setting temperature offset 2 0 C The setting temperature at the time of heating is offset by 2 0 C 04 Setting temperature offset 1 0 C The setting temperature at the time of heating is offset by 1 0 C 01 Low fan speed X Note 1 At the time of heating thermostat OFF operate with low fan speed 02 Setting fan spe
108. bnormally and may cause explosion and injuries Be sure to have the electrical wiring work done by qualified electrical installer and use exclusive circuit Power source wifh insufficient capacity and improper work can cause electric shock and fire lise specified wire for electrical wiring fasten the wiring to the terminal securely and hold the cable securely in order not to apply unexpected stress on the terminal Loose connections or hold could result in abnormal heat generation or fire Arrange the electrical wires in the control box properly to prevent them from rising Fit the lid of the services panel property Improper fitting may cause abnormal heat and fre Check for refrigerant gas leakage after installation is completed H the refrigerant gas leaks into the house and comes in contact with a fan heater a stove or an oven toxic gas is produced lise the specified pipe flare nut and tools for R410A Using existing parts R22 could cause the unit fallure and serious accident due to explosion of the cooling cycle Tighten the flare nut according to the specified method by with torque wrench Af the Bare nut were tightened with excess torque it could cause burst and refrigerant leakage after a long period Do not put the drainage pipe directly into drainage channels where poisonous gases such as sulfide gas can occur Poisonous gases will flow into the room through drainage pipe and seriously affect the user s health and
109. case of pulling out In case of pulling out from upper left X Y Terminal block Attach M3 screw with washer upper left L1120 X wiring 215mm Y wiring 195mm In case of pulling out from upper left In case of pulling out from 12 SRK T 126 Cut off the upper thin part of remote control lower case with a nipper or knife In case of pulling ot from center In case of pulling out from center The peeling off length of sheath Pulling out from upper left Pulling out from center X wiring 170mm Y wiring 190mm The peeling off length of sheath Embedded mounting Remote control installation dimensions Wall surface 120 Tighten the screws after Remote cutting off the thin part of screw mounting part Wiring oulet Electrical box 12 x 7 Slot hole Not included nstallation hole 9 5 x 5 Slot hole 4places 1 Installation screw for remote control j M4 Screw 2 pieces Unit mm Wiring specifications 1 If the prolongation is over 100m change to the size below But wiring in the remote controller case should be under 0 5mm Change the wire size outside of the case according to wire connecting Waterproof treatment is necessary at the wire connecting section Be careful about contact failure 100 to 200m Under 300m 0 75mm X 2 cores Under 400m 1 25mm x 2 cores Under 600m Adapted to RoHS directive PJZ000Z295 12 SRK T 12
110. ceiver when the remote controller is operated at 1m high under the condition of ceiling height of 2 4m The receivable area of the signal when the illuminance at the receiver is 300lux Dm 4m The receivable area of the L signal when the illuminance at the receiver is 600lux Installation tips when several receivers are installed close Minimum distance between the indoor units which can avoid cross communication is 5m under the condition of 300lux of illuminance at the receiver When no lighting is installed within 1m of the receiver in an ordinary office How to disable the Auto mode opera VRF series except heat recovery 3 pipe systems cannot be operated in Auto mode Make sure to set the remote controller for the models so as not to be able to choose Auto mode Pressing ACL switch with MODE button kept pressing or inserting the batteries with pressing MODE button will make auto mode operation X When the batteries are removed the setting will return to the default setting Auto mode is valid Instruct the customer to set the mentioned above when replacing the batteries How to set is also mentioned in the user s manual attached on the air conditioner Auto mode operation setting A Backup button is provided on the receiver Backup button Even when the operation from the wireless remote controller is not possible due to flat batteries controller lost or contr
111. continuously within 60 thermistor anomaly I minutes after initial detection of this anomalous temperature Indoor heat exchanger re 50 C or lower is detected for 5 seconds continuously within 60 temperature thermistor E D minutes after initial detection of this anomalous temperature anomaly Or 70 C or higher is detected for 5 seconds continuously _ 55 C or lower is detected for 5 seconds continuously 3 times Outdoor air temperature E 3 B within 40 minutes after initial detection of this anomalous sensor sensor anomaly Or 55 C or higher is detected for 5 seconds continuously within 20 seconds after power ON Outdoor 55 C or lower is detected for 5 seconds continuously 3 times Outdoor heat exchanger E H within 40 minutes after initial detection of this anomalous sensor Or 55 C or lower is detected for 5 seconds continuously within 20 seconds after power ON Discharge pipe temperature sensor anomaly Lu 144 rA LD 25 C or lower is detected for 5 seconds continuously 3 times within 40 minutes after initial detection of this anomalous sensor 12 SRK T 126 B Error log and reset Error indicator Memorized error log Reset Stop the unit by pressing the ON OFF switch of remote controller fthe unit has recovered from anomaly it can be operated Remote controller display Higher priority error is memorized Red LED on indoor control PCB Not memorized B Resetting the
112. crimp the remote controller cord and secure with the removed screw 107 Make certain to remove a screw on the bottom surface of the remote controller Remove the upper case of the remote controller Insert a flat blade screwdriver to a concave portion of the bottom surface of the remote control and slightly twist it and the case is removed The remote controller cord can be extracted from the upper center After the thin part in the upper side of the remote controller upper case is scraped with a nipper or knife remove burr with a file The lower case of the remote controller is mounted to a flat wall with two accessory wood screws Lower case Connect the remote controller cord to the terminal block Connect the terminals X and Y of the remote controller and the terminals X and Y of the indoor unit No polarity of X and Y The wiring route is as shown in the right The wiring in the remote controller case should be 0 3 mm recommended to 0 5 mm at maximum Further peel off the sheath The peeling length of each wiring is as follows X wiring 160mm Sheath Y wiring 150mm Peeling length Mount the upper case for restoring to its former state so as not to crimp the remote controller cord and secure with the removed screw In the case of exposing installation secure the remote controller cord to the wall surface with a cord clamp so as not to loosen the remote controller cord
113. ctive outdoor PCB Broken sensor harness or temperature sensing section Check molding Disconnected wire connection connector Is the outdoor air outdoor air Temperature resistance characteristics Broken wire temperature sensor connector connected properly For the characteristics of outdoor air temperature sensor see the following graph NO YES f 15 10 5kQ at 25 C Temperature sensor resistance kQ Shot circuit 0 10 20 30 40 50 Temperature C NO gt Correct connector Defective outdoor air temperature sensor Replace Defective outdoor PCB Replace Defective outdoor air temperature sensor input circuit Note 12 SRK T 126 m Error code Remote controller E39 LED Green Red Content Indoor Keeps flashing Stays OFF Discharge pipe temperature sensor anomaly J 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Detection of anomalously low temperature resistance on the discharge pipe temperature sensor 3 Condition of Error displayed When the temperature sensor detects 25 C or lower for 5 seconds continuously within 10 minutes to 10 minutes 20 seconds after the compres
114. d e en SW2 master slave setting N Master Wee I k OFF Slave Wiring 6 93 Terminal block X Y Clamp e DD SW3 Buzzer valid Invalid ON Valid D gt OFF Invalid SW4 Auto restart ON valig f 4 OFF Invalid 101 R oller te c Installation of the controller holder DO NOT install it on the following places 4 Hot surface or cold surface enough to generate 1 Places exposed to direct sunlight condensation 2 Places near heat devices 5 Places exposed to oil mist or steam directly 3 High humidity places 6 Uneven surface Wood screw Holder for remote controller Installation tips for the remote controller holder Adjust and keep the holder upright Tighten the screw to the end to avoid scratching the remote controller DO NOT attach the holder on plaster wall How to insert batteries Detach the back lid Insert the batteries two AAA batteries Reattach the back lid Ensure the correct polarity when inserting Control plural indoor units with one remote controller Up to 16 indoor units can be connected Connect the XY terminal with 2 core wire As for the size refer to the following note For Single packaged air conditioner series set the indoor unit address with SW2 on the indoor unit PCB from 0 to F so as not to duplicate Restrictions on the thickness and length
115. d speed Outdoor temperature lt 10 C Ist speed a Outdoor heat exchanger temperature lt 21 C After the outdoor fan speed drops down to 1 speed for 60 seconds if the outdoor heat exchanger temperature is lower than 21 C gradually reduce the outdoor fan speed by 1 speed Lower limit Ist speed b 21 C lt Outdoor heat exchanger temperature 38 C After the outdoor fan speed maintains at A speed for 20 seconds if the outdoor heat exchanger temperature is 21 C 38 C maintain outdoor fan speed c Outdoor heat exchanger tempeature gt 38 C After the outdoor fan speed rises up to 1 speed for 60 seconds if the outdoor heat exchanger temperature is higher than 38 C gradually increase outdoor fan speed by 1 speed Upper limit 3rd speed 3 Reset conditions When either of the following conditions is satisfied a The outdoor air temperature TH2 is 25 C or higher b The compressor command speed is 0 rps Heating 1 Operating conditions When the outdoor air temperature TH2 is 4 C or lower continues for 30 seconds while the compressor command speed is other than 0 rps 2 Detail of operation The outdoor fan is stepped up by 2 speed step at each 20 seconds Upper limit 8th speed 3 Reset conditions When either of the following conditions is satisfied a The outdoor air temperature TH2 is 6 C or higher b compressor command speed is 0 rps 44 12 SRK T 126 o Refrigeration cycle
116. defrost control 1 Control a When the indoor heat exchanger temperature detected with Th R1 or R2 drops to 35 C or lower the speed of indoor fan is changed to the lower tap at each setting b During the hot keep the louver horizontal control signal is transmitted 2 Ending condition When the indoor fan is at the lower tap at each setting it returns to the set airflow volume as the indoor heat exchanger temperature rises to 45 C or higher Fan control during the heating thermostat OFF When the heating thermostat is turned OFF the setting of the fan control is selectable using the indoor function of wired remote controller XX FAN CONTROL 1 Low fan speed Factory default If the indoor heat exchanger temperature drops below 35 C with the heating thermostat OFF the indoor fan operate at the lower speed tap at each setting 2 Set fan speed Even if the indoor heat exchanger temperature drops below 35 C with the heating thermostat OFF the indoor fan continues to run at the set airflow volume 3 Intermittence If the indoor heat exchanger temperature drops below 35 C with the heating thermostat OFF the indoor fan operates at the lower speed tap at each setting and when the indoor heater exchanger temperature drops below 25 C the indoor fan stops for 5 minutes Then the fan runs at the low speed tap for 2 minutes and the judgment is made by the thermostat 4 Fan OFF If the indoor heat exchanger temperature drops below 35
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118. e Remote controller cord 2 cores the insulation thickness in 1mm or more In case of embedding cord Erectrical box M4 screw 2 pieces In case of exposing cord Cord clamp if needed Installation procedure CD Open the cover of remote controller and remove the screw under the buttons without fail 2 Remove the upper case of remote controller Insert a flat blade screwdriver into the dented part of the upper part of the remote controller and wrench slightly In case of embedding cord Embed the erectrical box and remote controller cord beforehand Controller cord Erectrical box Prepare on site E Prepare two M4 screws recommended length is 12 16mm on site and install the lower case to erectrical box Choose either of the following two positions in fixing it with screws Upper part Upper part o Tighten the screws after cutting off the thin part of Lour cab screw mounting part d o Wiring oulet Lower part y Lower part t m d Wiring oulet Connect the remote controller cord to the terminal block B S 4 Connect the terminal of remote controller X Y with the terminal of MA screw x 2 Prepare on site indoor unit X Y X and Y are no polarity The thin part JN Upper p E 6 Install the upper case as before so as not to catch up the remote controller cord cc and tighten vvith the screvvs Lower case 0 cooo
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120. e cord on the wall with cord clamp so as not to slack Installation and wiring of remote controller CD Wiring of remote controller should use 0 3mm x 2 core wires or cables on site configuration Maximum prolongation of remote controller wiring is 600 m If the prolongation is over 100m change to the size below But wiring in the remote controller case should be under 0 5mm Change the wire size outside of the case according to wire connecting Waterproof treatment is necessary at the wire connecting section Be careful about contact failure 100 200m 0 5mm x 2 cores Under 300m aa 0 75mm x 2 cores Under 400m e 1 25mm x 2 cores Under 500m ue 2 0mm x 2 cores Master slave setting when more than one remote controllers are used A maximum of two remote controllers can be connected to one indoor unit or one group of indoor units Switch Setting Contents Indoor units Swi M Master remote controller S Slave remote controller 1 zi 5 controller cord no polarity Upper r7 r h DO i Master 1 Remote controller 1 Remote controller 1 I I 91 1 S M Master S M Slave ave 1 Plesk SSS 1 sw1 Lower Set SW1 to Slave for the slave remote controller lt was factory set to Master for shipment Note The setting Remote controller thermistor enabled is only selectable with the master remote controller in the position
121. e following conditions when the air flow is high mode Item Indoor air temperature Outdoor air temperature Operation DB WB DB WB Cooling 27 C 19 C 35 C 24 C Heating 20 C TC 6 C 2 This packaged air conditioner is manufactured and tested in conformity with the ISO 8 Sound pressure level indicates the value in an anechoic chamber During operation these value are somewhat higher due to ambient temperature 4 The operation data indicates when the air conditioner is operated at 220 230 240V 50Hz 5 VVhen vvireless remote controller is used fan is 3 speed setting Hi Me Lo only RWAO000Z234 12 SRK T 126 2 EXTERIOR DIMENSIONS 1 Indoor units Models FDTC25VF 35VF l 001 r uondo 19 01u02 7 001 Lab a om Lu a uondo 19 01u02 ul em 03102 ay uo iod uol p dsul ue piA01d ZXZ ueu 19010 e uo p Jjeysu 511 Pull pu 7x7 40 paubisap si iun siu AUIS uo OZdA 1920S Bunpeuuop ay ipd ld 7 i Xoq 101002 aj uo patpexye si jaqe aweu japow au 5910 1100 uoisuads 10 a3ejd Gg ma JO Gy 201 l
122. e than one remote controllers are used A maximum of two remote controllers can be connected to one indoor unit or one group of indoor units E Switch Setting Contents Indoor units i SW1 M Master remote controller E S Slave remote controller Ji 4 xd Remote controller cord no polarity 7 x Upper 1 Master Remote controller SW1 Slave Remote controller SW1 Master rr 1 r 1 r l Slave swi Lower Set SW1 to Stave for the slave remote controller It was factory set to Master for shipment Note The setting Remote controller thermistor enabled is only selectable with the master remote controller in the position where you want to check room temperature The air conditioner operation follows the last operation of the remote controller regardless of the master slave setting of it Caution When using multiple remote controllers the following dispiays or settings cannot be done with the slave remote controller It is available only with the master remote controller Louver position setting set upper or lower limit of swinging range Setting indoor unit functions Setting temperature range Operation data display Error data display Silent mode setting Test operation of drain pump GRemote controller sensor setting 12 SRK T 126 9 3 Operation control function by the indoor controller a b c Auto operation If Auto m
123. eas where it is not influenced by draft air Areas not exposed to direct sunlight Areas where dew point is lower than around 28 C and relative humidity is lower than 80 This indoor unit is tested under the condition of JIS Japan Industrial Standard high humidity condition and confirmed there is no problem However there is some risk of condensation drop if the air conditioner is operated under the severer condition than mentioned above If there is a possibility to use it under such a condition attach additional insulation of 10 to 20mm thick for entire surface of indoor unit refrigeration pipe and drain pipe Areas where TV and radio stays away more than 1m It could cause jamming and noise Areas where any items which will be damaged by getting wet are not placed such as food table wares server or medical equipment under the unit Areas where there is no influence by the heat which cookware generates Areas where not exposed to oil mist powder and or steam directly such as above fryer Areas where lighting device such as fluorescent light or incandescent light doesn t affect the operation A beam from lighting device sometimes affects the infrared receiver for the wireless remote controller and the air conditioner might not work properly O Check if the place where the air conditioner is installed can hold the weight of the unit If it is not able to hold reinforce the structure with boards and beams strong enough to hold it I
124. easure From previous page Adjustment during commissioning Does noise vibration occur when the cooline heating operation is in anomalous condition If insufficient cooling heating problem happens due to anomalous operating conditions at cooling heating followings are suspicious Overcharge of refrigerant Insufficient charge of refrigerant Intrusion of air nitrogen etc In such occasion it is necessary to recover refrigerant vacuum dry and recharge refrigerant Since there could be many causes of noise vibration the above do not cover all In such case check the conditions when where how the noise vibration occurs according to following check point Indoor outdoor unit Cooling heating fan mode Startup stop during operation Operating condition Indoor outdoor temperatures pressure Time it occurred Operation data retained by the remote controller such as compressor rotation speed heat exchanger temperature EEV opening degree etc Tone If available record the noise Any other anomalies Note 12 SRK T 126 o Error code Remote controller None LED 1 Green Red Indoor Keeps flashing Stays OFF Louver motor failure Q 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method 3 Condition of E
125. ed eb b A b B Note The latest operation has priority It is available to operate stop by remote controller or center controller b In case of Pulse input setting Local setting It is effective only when the input signal to CnT 6 is changed OFF ON and at that time unit operation ON OFF is inverted T6 h b A b B 3 Remote operation a In case of multiple units Max 16 indoor units group are connected to one wired remote controller When the indoor function setting of wired remote controller for External control set is changed from Individual Factory default to For all units all units connected in one wired remote controller system can be controlled by external operation input Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Signal amp Power Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit master Wired remote controller Ex Indoor units Q D lt 16 units 38 v vv x 12 SRK T 126 Individual operation Factory default All units operation Local setting Only the unit Only the unit directly connected directly connected All units in one All units in one remote controller remote controller system can be system can be operated stopped operation to the remote to the remote controller can be controller can be operated stopped opeartion When
126. ed At the time of heating thermostat OFF operate with the setting fan speed Heating fan controller 03 intermittent operation X Note 1 At the time of heatingr thermostat OFF intermittently operate At the time of heating thermostat OFF a fan will be stopped When the remote controller thermistor is enabled automatically set to Fan off Do not set at the time of the indoor unit thermistor External input Indoor unit function 04 Fan off 01 No offset 02 Return air temperature offset 2 0 C Offset the return air temperature of the indoor unit by 2 0 C 03 Return air temperature offset 1 5 C Offset the return air temperature of the indoor unit by 1 5 C 04 Return air temperature offset 1 0 C Offset the return air temperature of the indoor unit by 1 0 C 05 Return air temperature offset 1 0 C Offset the return air temperature of the indoor unit by 1 0 C 06 Return air temperature offset 1 5 C Offset the return air temperature of the indoor unit by 1 5 C 07 Return air temperature offset 2 0 C Offset the return air temperature of the indoor unit by 2 0 C Return air temperature offset Note 1 The symbol gt lt in the initial setting varies depending upon the indoor unit and the outdoor unit to be connected and this is Note 2 Fan speed of High speed setting automatically dete
127. een of CNW0 checked result of resistance of FM NO YES o NO NO CF YES YES NO bi Note 1 for GND NO bi YES bi Defective outdoor control PCB Noise filter Misconnection or breakage of connecting vvires Defective indoor control or power PCB Replace Replace FM LM etc Replace fuse Defective indoor power PCB gt Replace Open JX1 Defective indoor control PCB gt Replace Note 64 12 SRK T 126 m Error code Remote controller None LED Green Red Indoor Keeps flashing Stays OFF Power supply system error Power supply to remote controller U 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Remote controller wire breakage short circuit Defective remote controller Malfunction by noise Faulty indoor power PCB Broken harness Faulty indoor control PCB Isn t there any loose connection of remote controller wires NO Isn t remote controller wire broken or short circuited NO Disconnect remote controller wires Is DCISV or higher detected between X Y of indoor unit terminal block NO Is DC180V between
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129. ekly timer display Displays the settings of the weekly timer Operation setting display area Displays setting temperature airflow volume operation mode and oparation message Timer operation display Displays the timer operation setting Temperature setting buttons These buttons are used to set the temperature of the room Timer button This button is used to set the timer mode Operation check indicator light During oparation Lit in green PME L1 AM Te In case of error Flashing in red 1 h AM 161 ICH IEEE hour 34 PM P OC b Operation stop button This button is used to operate and stop the air conditioning system Press the button once to operate the system and press it once again to stop the system MODE button Timer setting buttons These buttons are used to set the timer mode and the time This button is used to change the operation mode FAN SPEED button This button is used to set the airflow volume VENT button ESP button This button is used to select the auto static pressure adjustment mode Cover This button is used to operate external ventilator LOUVER button This button is used to operate stop the swing louver AIR CON No button
130. elect from them 1 If plural indoor units are connected to a remote controller For example the indication is I U 000 blinking The lowest number of the indoor unit connected is indicated Da lt Function No AUTO RUN SET lt Function 1 0000 A G Press C SET button The current setting of selected function is indicated 2 Press LA or Y button for example AUTO RUN ON lt If 02 AUTO RUN SET is Select the number of the indoor unit you are to set selected If you select ALL UNIT Y you can set the same setting with all unites a2 3 H Se 3 Press CO SET button Press A or Y button Press A or Y button No and function are indicated by turns on the indoor unit function Select the setting table then you can select from them For example D AUTORUN ON Hz lt Function No FAN SPEED SET lt Function ne Press SET button RES The current setting 5 selected function is indicated _ For example STANDARD lt If 02 FAN SPEED SET is Press SET selected SET COMPLETE will be indicated and the setting will be completed D Then after No and function indication returns Set as the STANDARD Setting same procedure if you want to set continuously and if to finish go to 7
131. emp 16 CDB 18 CDB 20 CDB 22 CDB TC SHC TC SHC TC SHC TC SHC TC SHC 3 08 3 02 3 08 3 11 3 01 3 04 2 99 3 05 3 09 3 00 3 00 2 95 3 02 3 07 2 98 2 96 2 92 2 99 3 05 2 96 2 92 2 88 2 96 3 03 2 94 2 88 2 84 2 94 3 01 2 91 2 83 2 80 2 91 2 98 2 89 2 79 2 76 2 88 2 95 2 87 2 75 2 72 2 85 2 92 2 85 2 70 2 68 2 82 2 90 2 83 2 65 2 63 2 79 2 88 2 81 2 61 2 59 2 75 2 85 2 79 Hi 10 0 m min 15 CWB 2 61 2 56 2 50 2 45 10 CWB 2 96 2 91 2 87 2 79 5 CWB 3 20 3 16 3 09 3 06 O0 CWB 3 36 3 31 3 25 3 21 5 CWB 4 28 4 23 4 21 4 12 6 CWB 4 35 4 30 4 25 4 20 10 CWB 4 62 4 58 4 55 4 49 15 CWB 5 03 4 99 4 95 4 90 20 CWB 5 41 5 36 5 34 5 28 ISC10008 AN 8 APPLICATION DATA 8 1 Installation of indoor unit This manual is for the installation of an indoor unit For electrical wiring work Indoor refer to the electrical wiring work installation manual For remote controller installation refer to the installation manual attached to a remote controller For wireless kit installation refer to the installati
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133. er because the unit is installed at the ceiling where warm air tends to accumulate the setting can be changed with the wired remote controller indoor unit function e sP OFFSET The compressor and the heater are turned ON OFF at one of the setting temperature 3 2 or 1 C in order to improve the feeling of heating The setting temperature however has the upper limit of 30 C Standard Compressor Operation When it is set at 3 C Compressor Operation Stop i Stop 1 1 2 4 Setting temperature Setting temperature Room temperature deg Room temperature deg Return air temperature compensation This is the function to compensate the deviation between the detection temperature by the return air temperature thermistor and the measured temperature after installing the unit 1 Itis adjustable in the unit of 0 5 C with the wired remote controller indoor unit function RETURN AIR TEMP 1 0 C 1 5 C 2 0 C e 1 0 C 1 5 C 2 0 C 2 Compensated temperature is transmitted to the remote controller and the compressor to control them Note 1 The detection temperature compensation is effective on the indoor unit thermistor only 12 SRK T 126 9 4 Operation control function by the outdoor controller a Defrosting operation 1 2 Starting conditions Defrosting operation can be started only when all of the following conditions are met a b
134. error log Resetting the memorized error log in the remote controller Holding down CHECK button press TIMER button to reset the error log memorized in the remote controller Resetting the memorized error log The remote controller transmits error log erase command to the indoor unit when VENTT button is pressed while holding down CHECK button Receiving the command the indoor unit erase the log and answer the status of no error 2 Troubleshooting procedure When any trouble has occurred inspect as follows Details of respective inspection method will be described on later pages Confirmation Confirmation of Replacement of power remote controller and Check of the anomalous Inspection repair of Trouble gt supply LEDs on the PCB of iech operation data on the 1 y of the unit faulty part Indoor indoor unit Indoor remote controller controller test run outdoor unit remote controller adjustment 3 Troubleshooting at the indoor unit With the troubleshooting find out any defective part by checking the voltage AC DC resistance etc at respective connectors at around the indoor PCB according to the inspection display or operation status of unit the compressor does not run fan does not run the 4 way valve does not switch etc and replace or repair in the unit of following part a Replacement part related to indoor PCB s Control PCB power supply PCB
135. ess pipe C1220T specified in JIS H3300 for efrigeration pipe installation n addition make sure there is no damage both inside and outside of the pipe and no harmful substances such as sulfur oxide dust or a contaminant stuck on the pipes Do not use any refrigerant other than R410A Using other refrigerant except R410A R22 etc may degrade inside refrigeration oil And air getting into refrigeration circuit may cause over pressure and resultant it may result in bursting etc Store the copper pipes indoors and seal the both end of them until they are brazed in order to avoid any dust dirt or water getting into pipe Otherwise it will cause degradation of refrigeration oil and compressor breakdown etc Use special tools for R410 refrigerant Work procedure 1 Remove the flare nut and blind flanges on the pipe of the indoor unit X Make sure to loosen the flare nut with holding the nut on pipe side with a spanner and giving torque to the nut with another spanner in order to avoid unexpected stress to the copper pipe and then remove them Gas may come out at this time but it is not abnormal Pay attention whether the flare nut pops out as the indoor unit is sometimes pressured 2 Make a flare on liquid pipe and gas pipe and connect the refrigeration pipes on the indoor unit X Bend the pipe with as big radius as possible and do not bend the pipe repeatedly In addition do not twist and crush the pipes X Do a fl
136. f the current exceeds the setting value the compressor is stopped immediately Operation starts again after a delay time of 3 minutes k 1 m n 12 SRK T 126 Outdoor unit failure This is a function for determining when there is trouble with the outdoor unit during air conditioning The compressor is stopped if any one of the following in item 1 2 is satisfied Once the unit is stopped by this function it is not restarted 1 When the input current is measured at 1 A or less for 3 continuous minutes or more 2 Ifthe outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on Rotor lock If the motor for the compressor does not turn after it has been started it is determined that a compressor lock has occurred and the compressor is stopped Outdoor fan motor protection If the outdoor fan motor has operated at 75 rpm or under for more than 30 seconds the compressor and fan motor are stopped Outdoor fan control at lovv outdoor temperature Cooling 1 Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 30 seconds while the compressor command speed is other than 0 rps 2 Detail of operation After the outdoor fan operates at A speed for 60 seconds the corresponding outdoor heat exchanger temperature shall implement the following controls Value of A Outdoor fan Outdoor temperature gt 10 C 2n
137. f the strength is not enough it could cause injury due to unit falling Q If there are 2 units of wireless type keep them away for more than 5m to avoid malfunction due to cross communication When plural indoor units are installed nearby keep them away for more than 4m Space for installation and service When it is not possible to keep enough space between indoor unit and wall or between indoor units close the air supply port where it is not possible to keep space and confirm there is no short circuit of airflow Install the indoor unit at a height of more than 2 5m above the floor 400mm or more Z Z Indoor unit gt Indoor unit 000mm or more 80mm or more slacie 12 SRK T 126 3 Preparation before installation If suspension bolt becomes longer do reinforcement of earthquake resistant O For grid ceiling When suspension bolt length is over 500mm or the gap between the ceiling and roof is over 700mm apply earthquake resistant brace to the bolt O In case the unit is hanged directly from the slab and is installed on the ceiling plane which has enough strength When suspension bolt length is over 1000mm apply the earthquake resistant brace to the bolt Prepare four 4 sets of suspension bolt nut and spring washer M10 or M8 on site Ceiling opening Suspension bolts pitch Pipe position 5530 Suspension bolts pitch F Decorative panel
138. flashing Stays OFF Operates but does not cool 12 SRK T 126 J 1 Applicable model 5 Troubleshooting All models 2 Error detection method 3 Condition of Error displayed Diagnosis Countermeasure Check the indoor unit fan operation Check the temperature differnce between return and supply air temperature differnce and supply air 10 20degC at ing Does the heat load increase after installtion YES Y Mistake in model selection Calculate heat load once more Is the compressor operating YES Is the Message is displayed for 3 seconds when performing cooling defrosting and heating operations from the remote NO WAIT controller It is normal This unit is designed to start in the soft start mode by detecting the under dome temperature of compressor when it restart after power reset It is necessary to replace to higher capacity one or to install additional unit Compressor refrigerant oil protection control at starting is activated Compressor may be stopped by the error detection control For the contents of control refer to anomalous stop control by controlling compressor rotation speed of microcomputor control functions Inspect the followings compressor rotation N
139. g yellow green from PCB T1 T2 T3 that was removed in 1 In that case do not place the crimping part of the wiring under the PCB Note 1 It might not be applicable on some models Note 2 After replacing PCB connection between capacitor assy and connector CNP is no longer needed Power PCB Parts mounting are different by the kind of PCB CNM White Fan motor 0202 is 0201 g T OOo t prop 204 zou A PT ei a EE CNWO White Terminal block T250VL3 15A 250V SA CNW1 Blue Control PCB T250VL3 15A 250V 52 R308 C325 CNW2 Red Control PCB PJAS65A092 1 i i 1 x T ro r MM a b 206 52x4 F203 H o s a 05200 T2 Yellovv Green Earth D T3 Yellow Green a I IN 16202 wt HE uv CNR White Drain motor Note 2 CNP White Capacitor assy WT e EET H Q 1 gs Unscrew terminal of the wiring to PCB from the box 2 Cut the band Note 1 do not cut the band that binds only the red and blue wirings tal Screw bach the terminal of wiring from PCB 0 6 Let the wiring red and blue pass beneath the yellow green wiring and bind together with band 12 SRK T 126 DIP switch setting list Address No setting at plural indoor units control by 1 R C Lo oE SVV6 1 EN M
140. gize the crankcase heater migrated liquid refrigerant in the refrigerant oil in compressor can be evaporated Check whether the electric leakage breake conforms to high hermonic specifications As units has inverter in order to prevent from improper operation be sure to use high hermonic one 12 SRK T 126 11 OPTION PARTS PJA012D730 11 1 Installation of wired remote controller RC E5 Read together with indoor unit s installation manual Fasten the wiring to the terminal securely and hold the cable securely so as not to apply unexpected stress on the terminal Loose connection or hold will cause abnormal heat generation or fire Make sure the power supply is turned off when electric wiring work Otherwise electric shock malfunction and improper running may occur DO NOT install the remote controller at the following places in order to avoid malfunction 1 Places exposed to direct sunlight 4 Hot surface or cold surface enough to generate condensation 2 Places near heat devices 5 Places exposed to oil mist or steam directly 8 High humidity places 6 Uneven surface DO NOT leave the remote controller without the upper case In case the upper cace needs to be detached protect the remote controller with a packaging box or bag in Q order to keep it away from water and dust Accessories Remote controller wood screw 03 5 16 2 pieces Prepare on sit
141. gt Set address again SW2 on same address indoor control PCB NO Are remote controller wires laid YES l Separate remote controller along high voltage f hieh volt wires wires from high voltage wires NO Disconnect the connecting wire G between the indoor and outdoor unit v Povver supply reset start 60 seconds later YES Defective indoor control automatically PCB Replace NO Defective remote controller Change Note If any error is detected 30 minutes after displaying th WAIT ON on the remote controller the display changes to INSPECT VU 12 SRK T 126 Error code Remote controller INSPECT UU LED Green Red Indoor Keeps flashing Stays OFF INSPECT HU Connection of 3 units or more remote controller J 1 Applicable model 5 Troubleshooting All models 2 Error detection method Indoor unit cannot communicate for more than 30 minutes after the power on with remote controller 3 Condition of Error displayed Same as above 4 Presumable cause Improper setting Surrounding environment Defective remote controller communication circuit Faulty indoor control or power PCB Faulty outdoor control PCB Diagnosis Countermeasure Are more than 3 units of remote controller connected Does remote YES controller display Slave
142. he outdoor heat exchanger Air inlet temperature of 5 outdoor unit in CVVB OMONE Adjustment coefficient 1 00 How to obtain the cooling and heating capacity Example The net cooling capacity of the model FDTC35VF with the piping length of 15m indoor vvet bulb temperature at 19 0 C and outdoor dry bulb temperature 35 C is Net cooling capacity 3600 X 0 975 3510 W Ton 4 FDTC35VF Length 15m Factor by air temperatures 4 12 SRK T 126 7 CAPACITY TABLES Model FDTC25VF Cool Mode Heat Mode Indoor air temp Air flow Hi 9 0 m min Outdoor air temp 21 CDB 31 CDB 14CWB 23 CDB 26 CDB 16 CWB 18 CWB TC TC 27CDB 19 CWB TC SHC 28 CDB 20 CWB TC SHC 22 CWB 33 CDB 24CWB TC SHC 3 01 3 12 3 17 2 51 3 23 2 48 2 96 3 07 3 13 2 49 3 19 2 46 Model FDTC35VF Outdoor air temp 21 CDB Cool Mode 23 CDB 26 CDB Indoor air temp 27 CDB 28 CDB 31 CDB 33 CDB 14CWB 16 CWB 18 CWB 19 CWB 20 CWB 22 CWB 24CWB Air flow Hi 9 5 m min Air flow outdoor air temp 15 CWB indoor air temp 16 CDB 18 CDB 20 CDB 22 CDB 10 CWB 5 CWB O CWB 5 CWB 6 CWB 10 CWB 15 CWB 20 CWB Heat Mode outdoor air temp indoor air t
143. heat exchanger temperature thermistor Replace Defective indoor control PCB gt Replace Defective indoor unit heat exchanger temperature thermistor input circuit Note 12 SRK T 126 o Error code Remote controller E7 LED en Red Indoor Keeps flashing 1 time flash Return air temperature thermistor anomaly p 1 Applicable model 5 Troubleshooting All models 2 Error detection method Anomalously low temperature or high temperature resistance is detected by indoor return air temperature thermistor Thi A 3 Condition of Error displayed When the temperature thermistor detects 50 C or lower for 5 seconds continuously the compressor stops After 3 minute delay the compressor starts again automatically but if this error occurs again within 60 minutes after the initial detection 4 Presumable cause Defective return air temperature thermistor connector Defective return air temperature thermistor Faulty indoor control PCB Diagnosis Countermeasure Is the connector OK YES Characteristics of return connection of return air temperature thermistor temperature thermistor OK NO air NO Broken wire o Temperature thermistor resistance kQ YES Temperature resistance characteristic 5kQ at 25 C
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145. ifference between the indoor heat exchanger temperature ThI R and the indoor return air temperature ThI A that it is in the state of gas low and stops the compressor Cooling Indoor return air temperature ThI A Indoor heat exchanger temperature ThI R 4 deg Heating Indoor heat exchanger temperature ThI R Indoor return air temperature ThI A lt 6 deg 12 SRK T 126 o Error code Remote controller E58 LED Green Red Content Indoor Keeps flashing Stays OFF Current safe stop 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method When the current safe control has operated at the compressor speed of 30 rps or under 3 Condition of Error displayed Same as above 4 Presumable cause Excessive refrigerant amount Indoor outdoor unit installation spaces Faulty compressor Defective outdor air temp sensor Defective outdoor PCB Is the refrigerant amount nomal Is outdoor good Inspect compressor Inspect outdor air temp sensor ventilation condition Adjust the refrigerant amount properly Secure space for inlet and outlet Replace compressor Replace sensor NO Defective outdoor PCB Replace Defective outdor air temp sensor input circuit Note
146. ing Hi Me Lo A WARNING Fasten the wiring to the terminal securely and hold the cable securely so as not to apply lt To change the settings gt unexpected stress on the terminal Remove the cover by unscrewing two screws from the back of receiver Loose connection or hold will cause abnormal heat generation or fire Change the setting by the switch on PCB R R R L ON Make sure the power supply is turned off when electric wiring work o 1234 OFF Otherwise electric shock malfunction and improper running may occur Default settings A CAUTION e DO NOT install the wireless kit at the following places in order to avoid malfunction 90 1 Places exposed to direct sunlight 8 Places where the receiver is influenced by x 2 Places near heat devices the fluorescent lamp especially inverter 3 High humidity places type or sunlight 4 Hot surface or cold surface enough to 9 Places where the receiver is affected by generate condensation infrared rays of any other communication 5 Places exposed to oil mist or steam directly devices 6 Uneven surface 10 Places where some object may obstruct the lo 7 Places affected by the direct airflow of the communication with the remote controller Receiver Backside Cover Backside AC unit DO NOT leave the wireless kit withou
147. ing wire from the grounding screw of outdoor unit to the grounding terminal on the distribution panel Do not connect to another grounding wire In order to prevent malfunction of the earth leakage breaker itself confirm that it is conformed to higher harmonic regulation Insulation resistance of compressor Immediately after installation or when the unit has been left for long time without power supply the insulation resistance may drop to a few MO because of refrigerant migrated in the compressor When the earth breaker is activated at lower insulation resistance check the following points 6 hours after power ON check if the insulation resistance recovers to normal When power ON crankcase heater heat up compressor and evaporate the refrigerant migrated in the compressor Check if the earth leakage breaker is conformed to higher Replace compressor Secure insulation resistance Noise harmonic regulation or not Since the unit is equipped with inverter it is necessary to use components conformed to higher harmonic regulation in order to prevent malfunction of earth leakage breaker Note 12 SRK T 126 m LED Content Indoor Excessive noise vibration 1 3 Error code Remote controller None 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method
148. installation After wiring work finished install the panel on the indoor unit After installation of drain pipe make sure that drain system work in good condition and no water Refer to attached panel installation manual for details see next page leakage from joint and drain pan Check if the motor sound of drain pump is normal or not Do drain test even if installation of heating season For new building cases make sure to complete the test before F hanging the ceiling Pour water of about 1000cc into the drain pan in the indoor unit by pump so as not to get the electrical component wet Make sure that water is drained out properly and there is no water E Bolt 4pieces Forinstalling the panel 2 leakage from any joints of the drain pipe at the test 3 Confirm that the water is properly drained out while the drain motor 2 4 1 Screw 1 piece For attaching a hook 5 1 Hook 1 piece For fixing temporarily Chain 2 pieces is operating At the drain socket transparent it is possible to Screw 2pieces For attaching a chain check if the water is drained out properly Unplug the drain plug on the indoor unit to remove remaining water Attach the panel on the indoor unit after electrical wiring work on the drain pan after the test and re plug it And insulate the drain Refer to attached manual for panel installation for details see next page pipe properly finally Drain
149. ion error at initial operation 3 3 J 1 Applicable model 5 Troubleshooting All models When the remote controller display is extinguished after the power on 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Blown fuse Connection between PCB s Blown fuse Faulty indoor control PCB Defective remote controller Wire breakage on remote controller Faulty outdoor PCB Diagnosis Countermeasure Remote controller display is extinguished after the power on Is the green LED on the indoor unit flashing YES Are wires connected properly between the indoor and the outdoor units Is am DC20V detected between on the outdoor unit terminal block YES s approx DC20V detected between on the indoor unit terminal block YES between wires at the remote controller Isthe fuse on the indoor control PCB OK NO i Replace fuse approx 10 11V detected Short circuit on remote side after disconnecting the controller wire remote controller YES gt NO gt Correct wires NO gt Defective outdoor PCB Replace NO pi Defective connection wire Broken wire Noise Defective indoor control PCB Replace Defective remote controller Note 12 SRK T 126 6
150. ion prohibition mode setting is Valid and External input setting is Level input Factory default D When card key switch is ON CnT 6 ON Operation permission start stop operation of the unit from the wired remote controller becomes available 2 When card key switch is OFF CnT 6 OFF Operation prohibition the unit stops operation in conjunction with OFF signal and start stop operation of the unit from the wired remote controller becomes not available In case that Operation permission prohibition mode setting is Valid and External input setting is Pulse input Local setting D When card key switch is ON Operation permission the unit starts operation in conjunction with ON signal and also start stop operation of the unit from the wired remote controller becomes available 2 When card key switch is OFF Operation prohibition the unit stops operation in conjunction with OFF signal and start stop operation of the unit from the wired remote controller becomes not available This function is invalid only at Center mode setting done by central controller u External input output control CnT Be sure to connect the wired remote controller to the indoor unit Without wired remote controller remote operation by CnT is not possible to perform 1 CnT Blue 12V i1 Optional i DOperation output CnT 2 XR1 an 2 Heating output CnT 3 XR2 P 2 e 4 GR 4 3
151. ion returns to the heating cycle when either one of the following is met a b Outdoor heat exchanger sensor TH1 temperature 13 C or higher Continued operation time of defrosting For more than 16 minutes and 50 seconds e Defrast operation Heating operation Max 16 minutes and 50 seconds 2 7 minutes I I I 1 1 I I I I 1 Hot keep operation X Depends on an operation condition the time can be longer than 7 minutes 12 SRK T 126 b Cooling overload protective control 1 Operating conditions When the outdoor air temperature TH2 has become continuously for 30 seconds at 41 C or more or 47 C or more with the compressor running the lower limit speed of compressor is brought up Item Medel Outdoor air temperature Lovver limit speed 30 rps 40 rps FDTC25 35VF More than 41 at less than 47 47 C or more 2 Detail of operation a The outdoor fan is stepped up by 3 speed step Upper limit 7th speed b The lower limit of compressor command speed is set to 30 or 40 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 30 or 40 rps However when the thermo becomes OFF the speed is reduced to 0 rps 3 Reset conditions When either of the following condition is satisfied a The outdoor air temperature is lower than 40 C or 46 C b The compressor command speed is 0 rps c Cooling high pressure control 1 P
152. ir Drain trouble Defective drain pump DM broken drain pump wire disconnected connector of DM Float switch Anomalous float switch operation malfunction Repair 1 time flash Defective indoor control PCB Defective float switch input circuit Replacement of Ind trol PCB bu Defective indoor control PCB Defective DM drive output circuit PCB Option Defective optional parts At optional anomalous input setting Repair Stays OFF a 1 9 Number m When multi unit control by remote controller is performed the number of units is over km In Fan motor Defective fan motor Replacement repair Stays OFF Indoor control PCB Defective indoor control PCB Replacement 1 time flash Q C i Indoor control PCB Improper operation mode setting J Remote controller temperature 6 StysOFF s ENEE Broken wire of remote controller temperature thermistor Repair Note 1 Normal indicator lamp Indoor unit Green extinguishes or lights continuously only when CPU is anomalous It keeps flashing in any trouble other than anomalous CPU 2 mark in the Description of trouble means that in ordinary diagnosis it cannot identify the cause definitely and if the trouble is repaired by replacing the part it is judged consequently that the replaced part was defective ii Outdoor unit Remote controller Indoor control PCB Error code Red LED Keeps flashing Red LED Stays
153. is restored with the holiday setting for all weekdays After recovering from the power failure it readjusts setting of weekly timer becomes effective Note 1 Items and are memorized regardless whether the pi the clock and resets the holiday setting for each weekday so that the Content memorized with the power failure compensation are as follows ower failure compensation is effective or not while the setting of silent mode is cancelled regardless whether the power failure compensation is effective or not If it had been operating under the off timer mode sleep timer mode the state of stop is memorized Although the timer mode is cancelled at the recovery from power failure the setting of weekly timer is changed to the holiday have been set with the remote controller function setting Indoor Upper limit value and lower limit value which have been set with the temperature setting control At power failure Operating stopped setting for all weekdays Operation mode Airflow volume mode Room temperature setting 6 Louver auto swing stop However the stop position 4 position is cancelled so that it returns to Position 1 Remote controller function items which function items are saved in the memory of indoor unit Sleep timer and weekly timer settings Other Parts layout on remote controller PCB timer settings are not memorized Sw2 S Master slave setting when mor
154. it FDTC25VF Outdoor unit SRC25ZJX S Item Panel TC PSA 25W E Power source 220 230 240V 50Hz Operation data Cooling Heating Nominal capacity kW 2 55 0 9 Min 3 2 Max 3 45 0 9 Min 4 7 Max Power consumption kW 0 6 0 84 Running current A 3 0 2 9 2 8 4 1 4 0 3 8 Povver factor 91 92 Inrush current A 4 1 Cooling P Hi 38 Hi 36 Me 32 Lo 29 Devel dB A 39 Hi 38 33 Lo 29 5 7 395x780x220 Exterior appearance Plaster White Stucco White Munsell color 6 8Y8 9 0 2 near equivalent 4 2Y7 5 1 1 near equivalent Net weight kg UNIT 15 PANEL 3 5 38 Refrigerant equipment 7 7 RM B5077MDE1 Rotary type x 1 Starting method Direct line start Refrigerant oil Q 0 35 DIAMOND FREEZE MA68 Heat exchanger Louver fin amp inner grooved tubing M shape fin amp inner grooved tubing Refrigerant control Electronic expansion valve Air handling equipment Fan type amp Q ty Turbo fan x 1 Propeller fan x 1 Motor Starting method w 33 lt Direct line start gt 24 lt Direct line start gt Airflow Standard CMM wen P Hi 105 Hi 95 Me 85 Lo 7 Heating 270 Available static pressure Pa 0 Outdoor air intake Not possible Air filter Q ty Pocket plastic net x 1 Washable Shock amp vibration absorber Rubber sleeve for fan motor Rubber sleeve for Compressor Insulation noise amp he
155. med according to the installation manual by an electrical installation service provider qualified by a power provider of the country and be executed according o the technical standards and other regulations applicable to electrical installation in the country Be sure to use an exclusive circuit Use specified cord fasten the wiring to the terminal securely and hold the cord securely in order not to apply unexpected stress on the terminal Do not put both power source line and signal line on the same route It may cause miscommunication and malfunction Be sure to do D type earth work For the details of electrical wiring work see attached instruction manual for electrical wiring work Remove a lid of the control box 1 screws Hold each wiring inside the unit and fasten them to terminal block securely Fix the wiring with clamp Install a lid of the control box back to original place Single split PAC series Power source side terminal block Wiring between indoor and outdoor unit Remote controller line CH Wiring clamp Power source side terminal block Indoor power source line 5i Signal line shielded cord N Remote controller line Wiring clamp
156. more than one indoor unit Max 16 indoor units are connected in one wired remote controller system 1 With the factory default external input to CnT 6 is effective for only the unit D 2 When setting For all unit Local setting all units in one remote controller system can be controlled by external input to CnT 6 on the indoor unit 3 External input to CnT 6 on the other indoor unit than the unit 1 is not effective Fan control at heating startup 1 Start conditions At the start of heating operation if the difference of setting temperature and return air temperature is 5 C or higher after the end of hot start control this control is performed 2 Contents of control a Sampling is made at each minute and when the indoor unit heat exchanger temperature detected with Thi R is 37 C or higher present number of revolutions of indoor unit fan speed is increased by 10min b Ifthe indoor unit heat exchanger temperature drops below 37 C at next sampling present number of revolutions of indoor unit fan speed is reduced by 10min 3 End conditions Indoor fan speed is reduced to the setting airflow volume when the compressor OFF is established and at 30 minutes after the start of heating operation Room temperature detection temperature compensation during heating VVith the standard specification the compressor is turned ON OFF vvith the thermostat setting temperature VVhen the thermostat is likely to turn OFF earli
157. n 4 Presumable cause Considering appropriate operation control check Faulty 4 way valve operation 1 suspicious points Poor compression of 5 Inspect the followings for compressor of room and outdoor air close YES gt reference Faulty expansion valve to the rated i Major clogging of filter operation Note 1 Outdoor 7 C Indoor 20 C Major clogging of heat NO exchanger Major short circuit Major shortage of The unit is operating normally but is f refrigerant amount operating under the contol for protecting Compressor protection ON compressor or other respective parts Indoor fan tap Note 12 SRK T 126 o Error code Remote controller None LED Green Red Content Indoor Stays OFF Says Earth leakage breaker activated J 1 Applicable model 5 Troubleshooting All models 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Defective compressor Diagnosis Countermeasure Are OK the insulation resistance and ME NO coil resistance of compressor YES Is insulation of respective harnesses OK NO Is any harness bitten between pannel and casing or etc YES Check the outdoor unit grounding wire earth leakage breaker Check of the outdoor unit grounding wire earth leakage breaker Run an independent ground
158. n the speed is kept to 50 60 rps Note 1 Valuesin are for outdoor air temperature is 22 C or 25 C ON Upper limit 50 rps Lower limit 44 rps ON f Upper limit 60 rps Lovver limit 30 rps e Values of A B C D Outdoor air temp C i OFF A B gt First time 0 3 22 25 P Ge air a m See 7 10 25 28 3 12 SRK T 126 Reset conditions When either of the following condition is satisfied a outdoor air temperature TH2 is D C or higher b compressor command speed is 0 rps e Heating high pressure control 1 Purpose Prevents anomalous high pressure operation during heating 2 Detector Indoor heat exchanger sensor THI R 3 Detail of operation Example Fuzzy Notes After lapse of 20 sec or over After lapse of 20 sec or over lower limit speed 30 rps After lapse of 20 sec or over Indoor unit heat exchanger temperature C 1 When the indoor heat exchanger temperature is in the range of B C C the speed is reduced by 4 rps at each 20 seconds 2 When the indoor heat exchanger temperature is in the range of C D C the speed is reduced by 8 rps at each 20 seconds When the temperature is D C or higher continues for 1 minute the compressor is stopped 3 When the indoor heat exchanger temperature is in the range of A B C if the compressor command speed is been maintained and the operati
159. n procedure is same as above Excluding matters related to connection When the power supply is reset after the occurrence of E5 the LED will display WAIT if the anomaly continues If the breaker ON OFF is repeated in a short period of time within 1 minute WAIT fh may be displayed In such occasion 12 SRK T 126 o VVhen the fuse is blovvn the method to inspect outdoor PCB before replacing the povver supply fuse Diagnosis Countermeasure LED Green Red C Remote controller f WAIT ift Ind fashino Stays OFF ommunication error at initial operation 2 3 J i I Applicable model 5 Troubleshooting All models 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Blown fuse Faulty outdoor PCB Faulty reactor Isn t there outdoor PCB YES a short circuit between phases of NO v Replace the outdoor PCB Aren t there ransistor module or stack Cracks or burning on the power diode Replace the outdoor control PCB YES Isn t reactor the anomalous v Replace the reactor Replace fuse Note 69 12 SRK T 126 o Remote controller Ob WAIT 115 LED Green Red Indoor Keeps flashing Stays OFF Communicat
160. nction for corresponding models sn t filter clogged Are adequate indoor outdoor unit installation spaces Isn t there any short circuit of air Isn t there any fouling clogging on indoor heat exchanger Note 12 SRK T 126 6 Error code Remote controller E37 LED fen Red Indoor Keeps flashing Stays OFF Outdoor heat exchanger temperature sensor anomaly 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Detection of anomalously low temperature resistance on the outdoor heat exchanger temperature sensor 3 Condition of Error displayed When the temperature sensor detects 55 C or lower for 20 seconds continuously within 2 minutes to 2 minutes 20 seconds after the compressor ON the compressor stops After 3 minutes delay the compressor starts again automatically but if this anomalous temperature is detected 3 times within 40 minutes When 55 C or lower is detected for within 20 second after power ON 4 Presumable cause Defective outdoor PCB Broken sensor harness or temperature sensing section Disconnected wire connection connector Broken wire Shot circuit Is the outdoor heat exchanger temperature sensor connector NO connected properly YES For the characteristics of
161. ndicates when the air conditioner is operated at 220 230 240V 50Hz Item Indoor air temperature Outdoor air temperature Operation DB WB DB WB Cooling 27 C 19 C 35 C 24 C Heating 20 C TC 6 C 5 When wireless remote controller is used fan is 3 speed setting Hi Me Lo only RWA000Z234 N N 12 SRK T 126 Adapted to RoHS directive Model FDTC35VF Indoor unit FDTC35VF Outdoor unit SRC35ZJX S Item Panel TC PSA 25W E Power source 220 230 240V 50Hz Operation data Cooling Heating Nominal capacity kVV 3 6 10 9 Min 4 1 Max 4 25 10 9 Min 5 1 Max Povver consumption kVV 1 07 1 16 Running current A 4 9 4 7 4 5 5 3 5 1 4 9 Povver factor 99 99 Inrush current A 5 3 Cooling P Hi 41 Hi 40 Me 36 Lo 30 Sound Pressure bevel dB A P Hi 43 Hi 42 Me 35 Lo 32 90 x x 27 7 Exterior appearance Plaster White Stucco White Munsell color 6 8Y8 9 0 2 near equivalent 4 2Y7 5 1 1 near equivalent Net vveight kg UNIT 15 PANEL 3 5 38 Refrigerant equipment 5 SO RM B5077MDE1 Rotary type x 1 Starting method Direct line start Refrigerant oil 1 0 35 DIAMOND FREEZE MA68 Heat exchanger Louver fin amp inner grooved tubing M shape fin amp inner grooved tubing Refrigerant control Electronic expansion valve 7 ae 77 Turbo fan x 1 Propeller fan x 1 Motor Star
162. ndoor unit function 13 109 7 How to set functions by button operation 1 2 3 4 5 Stop air conditioning and simultaneously press 12 SRK T 126 AIR CON NO s at the same time for over three seconds The function number 01 blinks in the upper right LU m Press TEMPA or TEMP Select the function number Press lt MODE button Decide the function number In the case of selecting the remote controller function 01 06 The current setting number of the selected function number blinks Example Function number 01 lighting Setting number 01 blinking Function number r LI Setting number LI ai n 11 Ve ON OFF End button Decide button Select button ek Start button o A No In the case of selecting the indoor unit function 07 14 88 blinks on the temperature setting indicators blinking for approximately 2 to 10 seconds while data is read 1 After that the current setting number of the selected function number blinks Example Function number 07 lighting Setting number 01 blinking Function number Press TEMPA TEMPY button Select the setting dicus Press lt MODE The se butt
163. ng 3 Condition of Error displayed Ifthe output current of inveter exceeds the specifications it makes the compressor stopping 4 Presumable cause Defective outdoor PCB Faulty power supply Insufficient refrigerant amount Faulty compressor Faulty power transistor module From previous page Is the checked result of power transistor module OK NO s the space for installation of indoor and or outdoor unit enough Is there any short circuit of air on indoor and or outdoor unit At cooling does the outdoor fan motor run Are the service valves fully opened Is the filter clogged e At heating does the indoor fan motor run Are the service valves fully opened Is the filter clogged Is there any liquid flooding Is the superheat within normal range Is the low pressure sensor and suction pipe temperature thermistor normal s there any anoumalous sound on the compressor Tesetting power for several times does it become normal NO YES Temporary noise may cause of anomaly If noise source can be found take countermeasure Y Y Defective outdoor PCB Replace Defective outdoor PCB Replace Note 12 SRK T 126 m Remote controller E47 LED Green Red Indoor Keeps flashing Stays OFF Active filter voltage error 1 Applicable model 5 Tr
164. ng number 8 Press lt y MODE button The setting is completed Light is on for approximately 3 to 20 seconds while data of the decided function No and setting No is transmitted Example Indoor unit No U 000 lighting for 3 to 20 seconds Function number 07 lighting for 3 to 20 seconds Setting number 01 lighting for 3 to 20 seconds Indoor unit No In the case of connecting plural indoor units Function number Setting number Then the screen goes back to the function number blinking indication 1 if the setting is sequentially conducted continue with the same procedures If the setting is finished proceed to 5 Even if D ON OFF button is pressed during setting the setting is ended However any details where the setting has not been completed will be ineffective The setting contents are stored in the controller and even if the power failure occur this will not be lost Confirmation method for current setting According to the operation the setting number displayed first after selecting function number and pressing 2 MODE button is the currently set content However in the case of selecting U ALL all units the setting number of the lowest number among the indoor units is displayed 110 INVERTER RESIDENTIAL AIR CONDITIONERS ra MITSUBISHI HEAVY INDUS
165. ng of installed unit or anomalous mounting of fan louver or motor and specify the contacting point and correct it When the heat exchanger or filter is clogged clean them In case that the unit is installed at the site where background noise is very low small noise from indoor unit can be heard but it is normal Before installation check for background noise If backgound nois is very low convince client prior to installation Note 12 SRK T 126 6 Error code Remote controller None LED Green Red Indoor _ _ Excessive noise vibration 2 3 1 Applicable model 5 Troubleshooting All models 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Diagnosis Countermeasure From previous page Unit side Does noise vibration heating operation is performed normally To next page occur when the cooling Are the pipes contacting the casing YES Is it heard continuous hissing or roaring sound YES Are hissing sounds YES heard at the startup or stopping Is blowing sound heard at the start stop of defrosting during heating Is cracking noise heard during heating operation Hissing noise is heard during cooling operation or after stopping YES Rearrange the piping to avoid contact with
166. ntinuous indication UOO0 The address of selected indoor unit is blinking for 2 seconds TATA LOADING A blinking indication appears while data loaded Next the operation data of the indoor unit is indicated AY displayed in order from data number 01 Upon operation of the button the current operation data is The items displayed are in the above table 12 SRK T 126 Data Item 8E Operation Mode SET amp Set Temperature RETURN 16 z Return Air Temperature t Remote Controller Thermistor Tempeature 1 1 1 6 Indoor Heat Exchanger Thermistor U Bend THI R2 6 Indoor Heat Exchanger Thermistor Capillary 1 1 6 Indoor Heat Exchanger Thermistor Gas Header AU ONSE Unit Fan Speed DEMAND Hz Frequency Requirements ANSWER Hz Response Frequency JAIN P Pulse of Indoor Unit Expansion Value TOTAL IL Rp Total Running Hours of The Indoor Unit OUTDOOR Outdoor Air Temperature TH F x Outdoor Heat Exchanger Thermistor ES THO R2 Outdoor Heat Exchanger Thermistor Hz Compressor Frequency IP MPa High Pressure Low Pressure TH b Discharge Pipe Temperature t Comp Bottom Temperature RMP Current TARGET SH Target Super Heat SH Super Heat T H Discharge Pipe Super Heat PROTECTION
167. ntinuously stops again the return air temperature thermistor E7 the heat exchanger temperature thermistor E6 Short circuit detection If the heat exchanger temperature thermistor detects 70 C or higher for 5 seconds continuously at 2 minutes and 20 seconds after the compressor ON during cooling operation the compressor stops E6 12 SRK T 126 t Operation permission prohibition In case of adopting card key switches or commercially available timers When the indoor function setting of wired remote controller for Operation permission prohibition is changed from Invalid Factory default to Valid following control becomes effective ji Optional 2 0 0 9 Bus 75 XR2 M Card key 12V XR3 e Switch Normal operation Operation permission prohibition mode E Valid Local M n d CnT 6 Operation Operation sor permission 1 Unit stops 1 2 G Only the LEVEL INPUT is acceptable for external input however when the indoor function setting of Level input Factory default or Pulse input is selected by the function for External input of the wired remote controller operation status will be changed as follows In case of Level input setting In case of Pulse input setting Unit operation from the wired remote controller becomes 2 available 1 Unit starts operation In case that Operation permiss
168. o CNT of the indoor printed circuit board from external the indoor unit will be operated independently according to the input from external If you input into CNT of the indoor printed circuit board from external all units which connect to the same remote controller are operated according to the input from external In normal working indication indoor unit temperature is indicated instead of airflow Only the master remote controller can be indicated Heating preparation indication should not be indicated HEAT PUMP x COOLING ONLY x 16 I EXTERNAL CONTROL SET INDIVIDUAL FOR ALL UNITS 17 ROOM rere INDICATION SET INDICATION OFF O INDICATION ON SINDICATION INDICATION N INDICATION OFF 19 SET c F O Temperature indication is by degree C Temperature indication is by degree F To next page To next page ON OFF button finished 12 SRK T 126 Note 1 The initial setting marked gt lt is decided by connected indoor and outdoor unit and is automatically defined as following table Function No Item Default Model Remote controller AUTO RUN SET AUTO RUN ON Auto RUN mode selectable indoor unit unction02 AUTO RUN OFF ndoor unit without Auto RUN mode Remote controller G IFAN SPEED SW d s VALI
169. o be reset for producing 2 0 C increase in temperature during heating To be reset for producing 1 0 C increase in temperature during heating 08 SP OFFSET To be reset producing 2 0 C increase in return air temperature of indoor unit To be reset producing 1 5 C increase in return air temperature of indoor unit To be reset producing 1 0 C increase in return air temperature of indoor unit RETURN AIR TEMP OFFSET 2 0 LOW FaN SPEED Q SET FAN SPEED IHTERMITTENCE To be reset producing 1 0 C increase in return air temperature of indoor unit To be reset producing 1 5 C increase in return air temperature of indoor unit To be reset producing 2 0 C increase in return air temperature of indoor unit When heating thermostat is OFF fan speed is low speed When heating thermostat is OFF fan speed is set speed When heating thermostat is OFF fan speed is operated intermittently When heating thermostat is OFF the fan is stopped When the remote thermistor is working FAN OFF is set automatically Do not set FAN OFF when the indoor unit s thermistor is working FROST PREVENTION TEMP Change of indoor heat exchanger temperature to start frost prevention control TEMP HIGH TEMP LOW FAN CONTROL ON FAN CONTROL OFF 12 _ FROST PREVENTION CONTROL Working only with the Single split series To control frost prevention the indoor fan tap is raised D
170. o the same position the louver is fixed at that position auto swing does not function If you press lll RESET button during settings the display will return to previous display H you press ON OFF button during the mode will be ended and return to original display and the settings that have not been completed will become invalid When plural remote controllers are connected louver setting operation cannot be set by slave remote controller It it is necessary to fix the louver position manually follow the procedure mentioned below 1 Shut off the main power switch 2 Unplug the connector of the louver motor which you want to fix the position Make sure to insulate unplugged connectors electrically with a vinyl tape 3 Adjust the louver position slowly by hand so as to be within the applicable range mentioned below table Vertical airflow direction Horizontal 23 Downwards 50 Dimension L mm 40 24 ht can be set between 24 40mm freely Any automatic control or operation from the remote controller will be disabled on the louver whose position is fixed in the above way Do not set a louver beyond the specified range Failure to observe this instruction may result in Gripping dew condensation the fouling of the ceiling and the malfunctioning of the unit 12 SRK T 126 Buninouro uous enp sxoous se uons synej yun esneo ueo 19eu09u pe S au euoudej
171. ode is selected by the remote controller the heating and the cooling are automatically switched according to the difference between outdoor air temperature and setting temperature and the difference between setting temperature and return air temperature When the switching of cooling mode lt gt heating mode takes place within 3 minutes the compressor does not operate for 3 minutes by the control of 3 minute timer This will facilitate the cooling heating switching operation in intermediate seasons and the adaptation to unmanned operation at stores etc Cooling operation Heating ection 1 3 A A3 Room temperature setting temperature Room temperature detected with Th A deg Note 1 Room temperature control during auto cooling auto heating is performed according to the room temperature setting temperature DIFF 1 deg 2 If the indoor heat exchanger temperature rises to 59 C or higher during 2 Heating operation stopped cooling heating operation it is switched automatically to cooling operation In addition for 1 hour after this svvitching the heating operation is not Heating OK performed regardless of the temperature shown at right i 1 1 1 56 59 Indoor heat exchanger temperature C Operations of functional items during cooling heating Operation Cooling Heating Thermostat Thermostat Thermostat Thermostati Hot start Dehumidify Functional item ON OFF ON OFF Defrost
172. odel selection As per model See table 1 SW6 4 SW7 1 Testrun Drain motor Nomal Testrun OFF Normal C SVV7 2 Reserved OFF 82 Keep OFF SW7 3 Powerfulmode Valid Invaid ON Valid C swa Reserved To T rr j ISLI Superlink terminal spare win Default setting Table 1 Indoor unit model selection with SW6 1 SW6 4 0 OFF 1 ON SVE 35VF Swoi Pt o owo 0 1 swe S o o 564 o o 4 Check of anomalous operation data with the remote controller Operation data can be checked with remote control unit operation Press the button The display change OPER D TA T Press the SET button while OPER DATA T When only one indoor unit is connected to remote controller TATALOADING is displayed blinking indication during data loading is displayed Next operation data of the indoor unit will be displayed Skip to step When plural indoor units is connected the smallest address number of indoor unit among all connected indoor unit is displayed Example d 9 1 blinking 1 seconds gt blinking Select the indoor unit number you vvould like to have data displayed with the A V button Determine the indoor unit number vvith the SET button H U000 A The indoor unit number changes from blinking indication to co
173. oes any foreign material intervene in rotational area of fan propeller I NO Does the fan YES v Remove foreign material rotate smoothly vvhen turned by hand YES Is DC280V detected between of fan motor connector CNM Power supply reset Note 1 for GND Is the fuse F202 blown v NO Replace the fan motor NO l Check power voltage YES gt Replace faulty fan motor and power PCB Replace fan motor If the error persists after replacing Is it normalized SR the fan motor replace the indoor control PCB YES Malfunction by temporary noise Note 12 SRK T 126 m Error code Remote controller E19 LED fen Red Indoor Keeps flashing 1 time flash Indoor unit operation check drain motor check setting error 1 Applicable model 5 Troubleshooting All models 2 Error detection method After indoor operation check when the communication between indoor and outdoor unit is established and SVV7 1 is still kept ON 3 Condition of Error displayed Same as above 4 Presumable cause Mistake in SVV7 1 setting Due to forgetting to turn OFF SVV7 1 after indoor operation check Diagnosis Countermeasure E19 occurs when the power ON Is SVV7 1 on the indoor control PCB
174. of CNW2 YES YES Correct YES Replace wires YES i Replace remote controller NO gt Defective indoor power PCB Replace Defective indoor control PCB Replace Note 12 SRK T 126 m Error code Remote controller INSPECT UU LED Green Red Indoor Keeps flashing Stays OFF When 1 or 2 remote controllers are connected INSPECT VU 1 Applicable model 5 Troubleshooting All models 2 Error detection method Communication between indoor unit and remote controller is disabled for more than 30 minutes after the power on 3 Condition of Error displayed Same as above 4 Presumable cause Improper setting Surrounding environment Defective remote controller communication circuit Faulty indoor control PCB Diagnosis Countermeasure YES 1 2 Set one remote controller for Master and the other for Slave Is it set Note 1 Use SWI to set at master or slave Does it become normal Do more than Are 2 units of remote controller connected at the slave remote controller Note 2 on the remote controller LCD YES Set SW1 on remote controller PCB at Master Slave is displayed one indoor units have the YES
175. ol yea N 0 Bess KI Hi I 89n0S 194404 N Z L q Iins jou UYM 1sn pe asegid pue Buno uuo9181u 1910818 1inoil 10 seebyoyms UlluG 6 pis1no aui ul ajqeo aui 10 51 SIULO 8210J PU191X9 WOJ UOI 9auuo2 euiuu19 au 199101d pue eoejd ul Sajqed spjou yO Jeyeaq yn21i 10 Jean uonejedo qine e juaAeJd 0 Sun 10 pauBisap 194231q 1In2119 eDexeo yea ue asn S eA V NOILNYI V d jueisise1 3luouuIpH Jayeaig abeyea yey p a66n dun p109 Jamod au ui yJOM uonejejsur Wa SAs Hulpunosh uujoju9d SAEN V e du 9 qe5 fiuraauuo2 100p1n0 100pU1 8 qe9 1 M0d SEET 12 SRK T 126 9 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 9 1 Wired remote controller option parts The figure below shows the remote controller with the cover opened Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation Characters displayed with dots in the liquid crystal display area are abbreviated The figure below shows the remote control with the cover opened Ventilaion display Displayed during ventilation operation Centeal control display Displayed when the air conditioning system is controlled by centralized remote control We
176. oller failure still it possible to operate as temporary means Press the button directly when operating it 1 The air conditioner starts the operation with the condition of Auto mode 23 C of set point High fan speed and horizontal louver position 2 The air conditioner stops the operation when SS the button is pressed when in operation 6 Cooling test run operation After safety confirmation turn on the power Transmit a cooling operation command with wireless remote controller while the backup button on the receiver is pressed If the backup button on the receiver is pressed during a test run it will end the test run 6 If you cannot operate the unit properly during a test run please check by consulting with inspection guides on the wiring diagram of outdoor units How to read the two digit display On the receiver of a wireless kit a two digit 7 segment display is provided 1 An indication will be displayed for one hour after power on 2 An indication will be displayed for 3 5 seconds after transmitting a STOP command from the wireless remote controller or the operation of the backup button to stop the unit 3 An indication appearing in 1 or 2 above will go off as soon as the unit starts operation 4 When there are no error records to indicate addresses of all the connected units are displayed 5 When there are some error records remaining the error records are displ
177. on tting is comp eted Setting number Proceed to 2 Note Light is on for approximately 3 to 20 seconds while data of the decided function No and setting No is transmitted Example Function number 01 lighting for 3 to 20 seconds Setting number 01 lighting for 3 to 20 seconds Function number Setting number Then the screen goes back to the function number blinking indication 1 if the setting is sequentially conducted continue with the same procedures If the setting is finished proceed to 5 Press 5 ON OFF button The setting is completed a In the case of connecting one remote control to plural indoor units the display will be as follows Indoor unit No display U 000 blinking Display the lowest number among the connected indoor units utu rn 14 Function number Indoor unit No b Press TEMPA or TEMP button Select the indoor unit No to be set If U ALL is selected the same setting can be set to all units c Press lt MODE button Decide the indoor unit No 88 blinks on the temperature setting indicators blinking for 2 to 10 seconds while data is read When AIR CON NO button is pressed go back to the indoor unit selection display for example U 000 blinking 2 Press TEMPA or TEMP Select the setti
178. on has continued for more than 20 seconds at the same speed it returns to the normal heating operation 4 Indoor blower retains the fan tap when it enters in the high pressure control Outdoor blower is operated in accordance with the speed e Temperature list Unit C A B RPSmin 50 48 53 55 58 50 S RPSmin 95 48 5 56 58 61 95 RPSmin lt 97 48 5 56 55 5 58 61 97 s RPSmin lt 104 48 5 55 5 51 5 58 53 5 61 104 RPSmin 115 48 5 42 1 51 5 44 53 5 47 3 61 115 RPSmin 42 1 44 47 3 61 Note 1 RPSmin The lower one between the outdoor speed and the compressor command speed f Heating overload protective control 1 Operating conditions When the outdoor air temperature TH2 is 22 C or higher continues for 30 seconds while the compressor command speed other than 0 rps 2 Detail of operation a Taking the upper limit of compressor command speed range at 60 rps if the output speed obtained vvith the fuzzy calculation exceeds the upper limit the upper limit value is maintained b The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower than that after fuzzy calculation the speed is kept to 40 rps However when the thermo becomes OFF the speed is re duced to 0 prs c Inching prevention control is activated and inching prevention control is carried out with the minimum speed set at 40 rps d The outdoor fan is set on 2nd speed
179. on is not working Mode button is not working On Off button is not working Fan speed button is not working Louver button is not working Timer button is not working GHG ESP K D AUTO RUN SET AUTO RUN ON X ALTO RUN DFF x lt 0 A TEHP Sil E RIT VALID O baal INVALID 04 ET MODE S le VRLT O INVALID 0519 ON OFF SW oo VALID e ESCHER 06 AFAN SPEED SW Ses VALID x ss INVALID x 07 ESI LDUVER SU LID x INVALID x 08 EPI TIMER SU IST VALID e 5 9 INVALID 09 EISEHSDR SET ESSENSUR OFF E3SENSUR N EJSENSDR 43 06 E3SENSUR 20e Remote thermistor is not working Remote thermistor is working Remote thermistor is working and to be set for producing 3 0 C increase in temperature Remote thermistor is working and to be set for producing 2 0 C increase in temperature EJSEHSIR 1 0 Remote thermistor is working and to be set for producing 1 0 C increase in temperature ESSENSOR 1 0 Remote thermistor is working and to be set for producing 1 0 C increase in temperature ESSENSOR 2 06 Remote thermistor is working and to be set for producing 2 0 C increase in temperature EJSENSUR 3 06 Remote thermistor is working and to be set for producing 3 0 C increase in temperature INVAL VALID
180. on manual attached to a wireless kit For electrical wiring work Outdoor and refrigerant pipe work installation for outdoor unit refer to page 22 This unit must always be used with the panel SAFETY PRECAUTIONS Read the SAFETY PRECAUTIONS carefully first of all and then strictly follow it during the installation work in order to protect yourself The precautionary items mentioned below are distinguished into two levels A WARNING and A CAUTION ASWARNING Wrong installation would cause serious consequences such as injuries or death CAUTION Wrong installation might cause serious consequences depending on circumstances Both mentions the important items to protect your health and safety so strictly follow them by any means The meanings of Marks used here are as shown as follows Never do it under ary circumstances 169 Always do it according to the instruction After completing the installation do commissioning to confirm there are no abnormalities and explain to the customers about SAFETY PRECAUTIONS correct operation method and maintenance method air filter Cleaning operation method and temperature setting method with user s manual of this unit Ask your customers to keep this installation manual together with the user s manual Also ask them to hand over the user s manual to the new user when the owner is changed ANWARNING installation should be performed by the specialist I you instal
181. onds and then the swing louver stops c Louver operation at the power on with a unit having the louver 4 position control function The louver swings one time automatically without operating the remote controller at the power on This allows inputting the louver motor LM position which is necessary for the microcomputer to recognize the louver position Note 1 If you press the LOUVER button the swing motion is displayed on the louver position LCD for 10 second The display changes to the SWING display 3 seconds later k I 12 SRK T 126 2 Automatic louver level setting during heating At the hot start with the heating thermostat OFF regardless whether the auto swing switch is operated or not auto swing or louver stop the louver takes the level position In order to prevent the cold start The louver position display LCD continues to show the display which has been shown before entering this control 3 Louver free stop control When the louver free stop has been selected with the indoor function of wired remote controller POSITION the louver motor stops when it receives the stop signal from the remote controller If the auto swing signal is received from the remote controller the auto swing will start from the position where it was before the stop Note 1 When the indoor function of wired remote controller POSITION has been switched switch also the remote control function 771
182. operation Setting TEMP display Error code display 20002272 Remote control installation dimensions 12 SRK T 126 In case of embedding wiring Wall surface Wiring 2 bai ise e Y S Wiring outlet N Electrical box In case of embedding vviring N Prepare on site 12 x 7 Slot hole Installation hole SS 9 x 4 5 Slot hole 2 places Note Installation screw for remote controller M4 Screw 2 pieces In case of exposing wiring 15 The remote controller wiring can be extracted from the upper center After the thin part in the upper side of the remote controller upper case is scraped with a nipper or knife remove burr with a file 0 3mm X 2 cores Thin part i Upper case ff mm LCD 4 Sheath o O ON OFF s E p Upper case A 1 Xj Y INS ARC j Y X Y Terminal block m 70 wiring Attach M3 screw with washer The peeling length of each wiring is as follows X wiring 160mm Y wiring 150mm Wiring specifications 1 Wiring of remote controller should use 0 3mm X 2 core wires or cables on site configuration 2 Maximum prolongation of remote controller wiring is 600m If the prolongation is over 10
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184. oubleshooting All models Diagnosis Countermeasure 2 Error detection method Error is displayed if the converter voltage exceeds DC340V 3 times within 20 minutes Remote controller may be set after 3 minutes delay 3 Condition of Error displayed Same as above 4 Presumable cause Defective outdoor PCB Dust on outdoor PCB Anomalous power supply Is the power supply normal within the specified range Soldered surfaces on the outdoor PCB for foreign matter like dust fouling YES Is voltage YES v NO v NO NO v Y YES Restore normal condition Restore normal condition Remove foreign matter like dust fouling etc Defective outdoor PCB Replace Note 88 12 SRK T 126 m Error code Remote controller E48 LED Green Red Indoor Keeps flashing Stays OFF Outdoor fan motor anomaly 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Detected by rotation speed of outdoor fan motor 3 Condition of Error displayed When actual rotation speed of outdoor fan motor drops to 75min or lower for 30 minutes continuously the compressor and the outdoor fan motor stop After 3 minutes delay it starts again automatically but if this anomaly occur
185. plug Check list after installation O In case electrical wiring work finished Drain pump can be operated by remote controller wired For the operation method refer to Operation for drain pump in the installation manual for wiring work O In case electrical wiring work not finished Drain pump will run continuously when the dip switch SW7 1 on the indoor unit PCB is turned ON the Connector CNB is disconnected and then the power supply 220 240VAC on the terminal block Insulation work is properly done Water leakage XD and 2 or and N is turned ON Water is drained properly Water leakage Make sure to turn OFF SW7 1 and reconnect the Connector CNB after the test Supply voltage is same as mentioned in the model name plate PCB burnt out not working at all There is mis wiring or mis connection of piping PCB burnt out not working at all Earth wiring is connected properly Electric shock Cable size comply with specified size PCB burnt out not working at all Any obstacle blocks airflow on air inlet and outlet Insufficient capacity Check the following items after all installation work completed Check if Expected trouble The indoor and outdoor units are fixed securely Falling vibration noise Inspection for leakage is done Insufficient capacity Wiring out position and wiring connection Electrical installation work must be perfor
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187. r 3 Do not pass CPU surrounding about wirings Control PCB Parts mounting are different by the kind of PCB CNJ White CNT Blue CNV Red External switch Louver motor SW2 Blue Address setting CNE White RAM checker SW6 Capacity setting Part number Les zem CNN Yellow dE e ul 00000 0 022 Heat exchanger 3 PPP CNT2 m NV Humidity sensor Float SW Remote controller CNC Red CNI Blue Auto lift CNB White CNH Black Thermistor Return air CNV2 Black 12 SRK T 126 Power PCB PSB012D953A This PCB is a general PCB Replace the PCB according to this instruction Replace the PCB refer to below dwg 1 Unscrew terminal of the wiring yellow green soldered to PCB from the box 2 Cut the band that binds the wiring red and blue from connector CNW1 and CNW2 and the wiring yellow green from PCB T2 T3 Note 1 However do not cut the band that binds only the red and blue wirings 3 Replace the PCB only after all the wirings connected to the connector are removed 4 Fix the board such that it will not pinch any of the wires 5 Reconnect the wirings to the PCB Wiring connector color should match with the color of connector of the PCB Note 2 6 Let the wiring red and blue pass beneath the yellow green wiring and bind together with band 7 Screw back the terminal of wirin
188. r is provided Optional a Operation starts in the cooling mode and the target relative temperature is determined based on the setting temperature If the humidity detected by the humidity thermistor becomes lower than the target relative temperature the indoor unit fan tap is retained b Anything other than a above is same as the item 1 above 12 SRK T 126 dj Timer operation 1 2 3 4 5 Sleep timer Set the duration of time from the present to the time to turn off the air conditioner It can be selected from 10 steps in the range from OFF 1 hour later to OFF 10 hours later After the sleep timer setting the remaining time is displayed with progress of time in the unit of hour OFF timer Time to turn OFF the air conditioner can be set in the unit of 10 minutes ON timer Time to turn ON the air conditioner can be set Indoor temperature can be set simultaneously Weekly timer Timer operation ON timer OFF timer can be set up to 4 times a day for each weekday Timer operations which can be set in combination Item tem Sleep timer OFF timer ON timer Weekly timer Sleep timer x x OFF timer x x ON timer O x Weekly timer x x x Note 1 O Allowed X Not e Remote controller display during the operation stop 1 2 Centralized control ON is displayed always on the LCD under the Center Remote and Center modes during the operation stop Power
189. rcuit Resistance temperature characteristics of remote controller temperature thermistor ThC Temperature C Resistance value kQ Temperature C Resistance value kQ 65 0 62 59 53 48 44 40 36 33 30 27 25 23 21 19 18 Note After 10 seconds has passed since remote controller thermistor was switched from valid to invalid E28 will not be displayed even if the thermistor harness is disconnected At same time the thermistor which is effective is switched from remote controller thermistor to indoor return air temperature thermistor Even though the remote controller thermistor is set to be Effective the return air temperature displayed on remote controller for checking still shows the value detected by indoor return air temperature thermistor not by remote controller temperature thermistor 12 SRK T 126 m Remote controller E35 B fen Red hdoor m bd s amp gOF F Cooling overload operation CS 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Anomalous stop 53 63 Outdoor heat exchanger temperature C 3 Condition of Error displayed When anomalous outdoor heat exchanger temperature occurs 5 times within 60 minutes or 63 C or higher continues for 10 minutes including the compressor stop 4 P
190. resumable cause Defective outdoor heat exchanger temperature sensor Defective outdoor PCB Indoor outdoor unit installation spaces Short circuit of air on indoor outdoor units Fouling clogging of heat exchanger Excessive refrigerant quantity Are normal the characteristics of outdoor heat exchanger temperature sensor normal YES Y Is the unit operating in rload Is the high pressure control normal YES the temperature direction of error correct the state of cooling measured actually at For the characteristics of outdoor heat exchanger temperature sensor refer to E37 NO gt YES gt NO gt NO gt YES gt Replace outdoor heat exchanger temperature sensor Check unit side e Isn t the air circulation of outdoor unit short circuited Are installation spaces adequate Isn t there any fouling or clogging on heater exchanger Control operation check Defective outdoor PCB Replace Excessive refrigerant amount Recharge refrigerant by weighing proper amount on a scale Note 12 SRK T 126 o Error code Remote controller E36 LED en Red Indoor Keeps flashing Stays OFF Discharge pipe temperature error J 1 Applicable model 5 Troubleshooting All models 2 Error detection method For
191. rmined as follows Indoor unit fan speed setting Fan speed setting Swith No Sam Sa Sang Seng i Function Settin Product model Function No 77 Standard i Mid Lo Hi Lo Hi Mid FAN SPEED button prohibited Product model whose indoor fan speed is only one step High speed 1 2 UHi Hi Mid UHi Mid UHi Hi Product model whose indoor fan speed is two steps or three steps FAN SPEED button FAN SPEED button enabled SW1 6 nitial setting of some indoor unit is High speed Fan speed three steps Product model whose indoor unit fan speed is three steps Note 3 As for plural indoor unit set indoor functions to each master and slave indoor unit Indoor unit fan Fan speed two steps Hi Lo Product model whose indoor unit fan speed is two steps speed Fan speed two steps Hi Me oa n 0 Fan one step Product model whose indoor unit fan speed is only one step prohibition and 08 External input Auto operation Auto operation enabled Product model where Auto mode is selectable setting Auto operation disabled Product model without Auto mode Heating fan Low fan speed Product model except FDUS control Intermittent operation FDUS Remote controller function 01 But only master indoor unit is received the setting change of indoor unit function 07 Operation permission Remote controller function 06 I
192. rror displayed 4 Presumable cause Defective LM LM wire breakage Faulty indoor control PCB Check at the indoor unit side Operate after waiting for more than 1 minute Does the louver operate at the power on NO NO YES gt Is the louver operable with the remote YES gt controller NO bi LM louver motor Repair vviring Defective indoor control PCB gt Replace Replace LM Normal Adjust LM lever and then check again Note 63 12 SRK T 126 m Remote controller None LED Green Red Indoor Stays OFF Stays OFF Power supply system error Power supply to Indoor control PCB 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method 3 Condition of Error displayed 4 Presumable cause Misconnection or breakage of connecting wires Blown fuse Faulty indoor control or power PCB Broken harness Faulty outdoor control PCB Noise filter AC220 230 240V detected between 1 and 2 on the terminal block of indoor unit YES Are fuses OK F200 F201 Is AC220 230 240V Or s unit detected between and 2 on the terminal Is the OK YES Is the LM etc OK Check of resistance betw
193. s 3 times within 60 minutes after the initial detection 4 Presumable cause Defective outdoor PCB Foreign material at rotational area of fan propeller Defective fan motor Dust on outdoor PCB Blown F3 fuse Does any foreign material intervene YES in rotational area of fan propeller NO Does the fan rotate smoothly when turned NO by hand YES Is DC308 336V detected between CNFAN black red of fan motor connector Is F3 250V1A fuse blown Power supply reset NO gt Is normal state restored NO YES Remove foreign matter Replace fan motor If resistance between Vm blue GND black is detected 1kQ or lower it is faulty Check power supply voltage Replace faulty fan motor and outdoor PCB Replace fan motor If anomaly persists after replacing fan motor replace outdoor PCB Malfunction by temporary noise Note When E48 error occurs in almost cases F3 fuse 1A on the outdoor PCB is blown There are a lot of cases that fuse is blown and E48 occurs due to defective fan motor And even though only the outdoor PCB or fuse is replaced another trouble could occur Therefore when fuse is blown check whether the fan motor is OK or not After confirming the fan motor normal check by power ON Don t power ON without confirming the fan motor normal 12 SRK T 126
194. safety This can also cause the corrosion of the indoor unit and a resultant unit failure or refrigerant leak Connect the pipes for refrigeration circuit securely in installation work before compressor is operated the compressor is operated when the service valve is open without connecting the pipe it could cause explosion and injuries due to abnormal high pressure in the system Stop the compressor before removing the pipe after shutting the service valve on pump down work K te pipe is removed when the compressor is in operation with the service valve open air would be mixed in the refrigeration Circuit and could cause explosion and injuries due to abnormal high pressure in the ctoling cycle Only use prescribed optional parts The installation must be carried out by the qualified installer Hm install the system by yourself it can cause serious trouble such as water leaks electric shocks fire Do not repair by yourself And consult with the dealer about repair Improper repair may cause waler leakage electric shock or fire Consult the dealer or a specialist about removal of the air conditioner Inter instalation may cause water leakage electric shock or fire Turn off the power source during servicing or inspection work l the power is supplied during servicing or inspection work it could cause electric shock and injury by the operating fan Do not run the unit when the panel or protection guard are taken off
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196. sor ON the compressor stops After 3 minutes delay the compressor starts again automatically but if this anomalous temperature is detected 3 times within 40 minutes 4 Presumable cause Defective outdoor PCB Broken sensor harness or temperature sensing section Check molding Disconnected wire connection connector discharge pipe temperature sensor properly Characteristics of discharge pipe temperature sensor OK connector connected NO For the characteristics of discharge pipe temperature sensor see the following graph NO YES Broken wire 100 Temperature resistance characteristics 50 Temperature sensor resistance kQ 0 Tx90 C 0 20 40 60 80 100 120 140 Shot circuit Temperature C Correct connector Defective discharge pipe temperature sensor Replace Defective outdoor PCB Replace Defective temperature sensor input circuit Note 12 SRK T 126 m 3 Condition of Error displayed If the output current of inveter exceeds the specifications it makes the compressor stopping 4 Presumable cause The valves closed Faulty power supply Insufficient refrigerant amount Faulty compressor Faulty power transistor module
197. stat ON OFF Fan operation ili Fan operation b End conditions The drain motor is turned OFF 5 minutes after the stop of operations 1 to iii above 12 SRK T 126 m Operation check drain pump test run operation mode n o 1 2 3 4 If the power is turned on by the dip switch SW7 1 on the indoor PCB when electric power source is supplied it enters the mode of operation check drain pump test run It is ineffective prohibited to change the switch after turning power on When the communication with the remote controller has been established within 60 seconds after turning power on by the dip switch SW7 1 ON it enters the operation check mode Unless the remote controller communication is established it enters the drain pump test run mode Note 1 To select the drain pump test run mode disconnect the remote controller connector CNB on the indoor PCB to shut down the remote controller communication Operation check mode There is no communication with the outdoor unit but it allows performing operation in respective modes by operating the remote controller Drain pump test run mode As the drain pump test run is established the drain pump only operates and during the operation protective functions by the microcomputer of indoor unit become ineffective Cooling dehumidifying frost protection 1 2 To prevent frosting during cooling mode or dehumidifying mode operation the of compressor speed
198. t the cover In case the cover needs to be detached protect the receiver with a packaging box or bag S di inorder toikeep it away from water and dust When SVV1 is turned to OFF position change the corresponding remote controller setting as follows f N How to change the remote controller setting Note Pressing ACL switch with AIR FLOW button kept pressing or Instruct the customer how to operate it correctly referring to the instruction manual inserting the batteries with pressing AIR FLOW button will For the installation method of the air conditioner itself refer to the installation manual enclosed in the customize the signal package X When the batteries are removed the setting will return 2 to the default setting D Accessories Please make sure to reset it when the batteries are replaced Please make sure that you have all of the following accessories Caution Receiver 1 Remote controller 1 Instruct the customer to set the mentioned above when holder replacing the batteries Wireless 57 is also in the user s manual remote 1 Wood screw for holder 7 2 attached on the air conditioner controller AAA dry cell batter Parts set 1 RO3 y y 9 2 Radio interference prevention mode Installation of the receiver D Attach the receiver to the panel according to the panel installation manual 2 Remove two screws and detach the lid from the control box ET
199. t the indoor unit position after hanging it by inserting the level gauge attached on the package into the air supply port and checking if the gap between the ceiling plane and the indoor unit is appropriate In order to adjust the indoor unit position adjust the lower nuts while the upper nuts are put on distant place Confirm there is no backlash between the hanger plate for suspension bolt and the lower nut and washer Drain piping Sspension bolt M upper at washer NS B ring washer A Mt lo wer 2 bm Level gauge Ceiling surface Refrigerant piping Use level gauges as reference adjust the bottom to the face of c the indoor unit bottom to the face of the indoor unit ola Use level gauges as Ceiling panel Correct Touch the nut lower and washer without any play reference adjust the Diffuser Diffuser Level gauge insulation Level gauge insulation When the ceiling panel comes below the T bar align the bottom of the level gauge to the lower face of the ceiling panel EL e Play is left between the fixture and the nut lower and washer 4 Installation of indoor unit continued 6 Make sure to install the indoor unit horizontally Confirm the evelness of the indoor unit with a level gauge or transparent hose filled with water Keep the height difference at both ends of he indoor unit within 3mm 7 Tighten four upper n
200. the indoor unit function setting of the wired remote controller Heating overload protection 1 2 If the indoor heat exchanger temperature detected with Thi R at 63 C or higher is detected for 2 seconds continuously the compressor stops When the compressor is restarted after a 3 minute delay if a temperature at 63 C or higher is detected for 2 seconds continuously within 60 minutes after initial detection and if this is detected 5 times consecutively the compressor stops with the anomalous stop E8 Anomalous stop occurs also when the indoor heat exchanger temperature at 63 C or higher is detected for 6 minutes continuously Compresr BF o ff 56 63 Indoor heat exchanger temperature C Indoor unit fan speed selection If after second detection of heating overload protection up to fourth the indoor fan is set at Me and Lo taps when the compressor is turned ON the indoor fan speed is increased by 1 tap p q s 12 SRK T 126 Anomalous fan motor After starting the fan motor if the fan motor speed is 200rpm or less is detected for 30 seconds continuously and 4 times within 60 minutes then fan motor stops with the anomalous stop E16 Plural unit control Control of 16 units group by one remote controller 1 2 Function One remote controller switch can control a group of multiple number of unit Max 16 indoor units Operation mode which is set by the remote controller switch
201. the unit by mus it may lead to serious trouble such as water leakage electric shock fre and injury due to overtum of the unit install the system correctly according to these installation manuals Improper instalation may cause explosion injury water leakage electric shock and fire When installing in small rooms take prevention measures not to exceed the density limit of refrigerant in the event of leakage referred by the formula accordance with 1505149 H the density of refrigerant exceeds the limit please consult the dealer and install the veriilation system otherwise lack of oxygen can occur which can cause serious accidents Use the genuine accessories and the specified parts for installation parts unspectied by oer company are used could cause water leakage electric shock fire and injery due to overtum of the wait ventilate the working area well in case the refrigerant leaks during installation H the refrigerant contacts the fire toxic gas is produced install the unit in a location that can hold heavy weight Improper installation may cause the unit to fall leading to accidents install the unit properly in order to be able to withstand strong winds such as typhoons and earthquakes Improper instalation may cause the unit to fall leading to accidents Do not mix air in to the cooling cycle on installation or removal of the air conditioner S H air is mixed in the pressure in the cooling wil rise a
202. ting method w 33 lt Direct line start gt 24 lt Direct line start gt REM Available static pressure Pa 0 Outdoor air intake Not possible Air filter Q ty Pocket plastic net x 1 Washable Shock amp vibration absorber Rubber sleeve for fan motor Rubber sleeve for Compressor Insulation noise amp heat Polyurethane form Electric heater w Remote controller wired RC E5 RC EX1A option wireless RCN TC 24W ER option Room temperature control Thermostat by electronics Safety equipment Overload protection for fan motor Internal thermostat for fan motor Frost protection thermostat Abnormal discharge temperature protection Installation data Liquid line I U 6 35 1 4 Pipe 6 35 1 4 x 0 8 O U 6 35 1 4 Refrigerant piping size k Gas line 9 52 3 8 q 9 52 3 8 x 0 8 9 52 3 8 Connecting method Flare piping Flare piping Refrigerant line one way length Max 15m Vertical height difference between outdoor unit and indoor unit Max 10m Outdoor unit is higher Max 10m Outdoor unit is lower Refrigerant Quantity R410A 1 2kg in outdoor unit incl the amount for the piping of 15m Drain pump Drain Built in Drain pump Hose Connectable with VP20 Insulation for piping Necessary Both liquid amp Gas lines Standard Accessories Mounting kit Drain hose Drain elbow Drain hole grommet Notes 1 The data are measured at th
203. tion Stays OFF Stays OFF Stays OFF Indoor unit power supply Power OFF broken wire blown fuse broken transformer wire Repair A Remote controller wires Poor connection breakage of remote controller wire For wire breaking at power ON the LED is OFF epair eeps shing 3 times Replacement of flash Remote controller Defective remote controller PCB remote controller ndoor outdoor units connection P ion biens ond d m M WAIT fb or e N Poor connection breakage of indoor outdoor units connection wire vire NSPECT VU 9893 Remote controller Improper setting of master and slave by remote controller Poor connection of remote controller signal wire White emote controller wires Noise For wire breaking at power ON the LED is OFF Intrusion of noise in remote controller wire Stays OFF Replacement of Defective remote controller or indoor control PCB defective communication circuit remote controller or PCB emote controller indoor control Poor connection of wire between indoor outdoor units during operation disconnection loose connection Repair Anomalous communication between indoor outdoor units by noise etc 2 times 5 ndoor outdoor units connection flash ashing wire Power reset or Noise CPU runaway on outdoor control PCB x Repair 2 times flash Outdoor control PCB Occurrence of defective outdoor control PCB on the way of power
204. tioner operation follows the last operation of the remote controller in case of the master slave setting Swi orale el ete 123456789 H SW1 1 0N Slave remote controller SW1 1 0FF Master remote controller 4 The indication when power source is supplied 1 At the time of turning the power source on after the light is on for the first 2 seconds the display becomes as shown below The number displayed on the upper side of LCD in the remote control is the software number and this is not an error code Software number The number in the left is one example Another number may be shown Then 88 0 C blinks on the remote controller until the communication between the remote controller and the indoor unit is established In the case of connecting one remote controller with one unit or one group of indoor unit make certain to set the master remote controller factory default If the slave remote control is set a communication cannot be established If a state where the communication between the remote controller and the indoor unit cannot be established continues about for 30 minutes E is displayed Confirm the wiring of E the indoor unit and the outdoor unit and master slave setting of the remote controller 5 Confirmation method for return air temperature Return air temperature can be confirmed by the remote controller operation 1 Press AIR C
205. top or when it was switched from the cooling and dehumidifying operations to the fan or heating operation Indoor unit operation mode Stop Cooling Dehumidifying Fan 2 Heating Note 1 Including the stop from the cooling dehumidifying fan and heating and the anomalous stop Compressor ON Control A 2 Including the Fan operation according to the mismatch of operation modes Compressor OFF Control B a Control A i If the float switch detects any anomalous draining condition the unit stops with the anomalous stop displays E9 and the drain pump starts After detecting the anomalous condition the drain motor continues to be ON ii It keeps operating while the float switch is detecting the anomalous condition b Control B If the float switch detects any anomalous drain condition the drain motor is turned ON for 5 minutes and at 10 seconds after the drain motor OFF it checks the float switch If it is normal the unit is stopped under the normal mode or if there is any anomalous condition E9 is displayed and the drain motor is turned ON The ON condition is maintained during the drain detection 2 Drain motor DM interlock control a Start conditions Depending on the function setting by the remote controller the drain motor is turned ON under either one of the following conditions 1 During heating mode operation Both the thermostat ON OFF ii During heating mode operation Both the thermo
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211. urpose Prevents anomalous high pressure operation during cooling 2 Detector Outdoor heat exchanger sensor TH1 3 Detail of operation Example Fuzzy After lapse of 30 sec or over After lapse of 30 sec or over lower limit speed 30 rps After lapse of 30 sec or over 53 58 63 Outdoor unit heat exchanger temperature C Notes 1 When the outdoor heat exchanger temperature is in the range of 58 63 C the speed is reduced by 6 rps at each 30 seconds 2 When the temperature is 63 C or higher the compressor is stopped 3 When the outdoor heat exchanger temperature is in the range of 53 58 C if the compressor command speed is been maintained and the operation has continued for more than 30 seconds at the same speed it returns to the normal cooling operation d Cooling low outdoor temperature protective control 1 Operating conditions When the outdoor air temperature TH2 is 22 C or lower continues for 20 seconds while the compressor command speed is other than 0 rps 2 Detail of operation a Thelower limit of the compressor command speed is set to 44 30 rps and even if the speed becomes lower than 44 30 rps the speed is kept to 44 30 rps However when the thermo becomes OFF the speed is reduced to 0 rps b The upper limit of the compressor command speed is set to 50 60 rps and even if the calculated result becomes higher than that after fuzzy calculatio
212. uts and fix the unit after height and levelness adjustment Do not adjust the height by adjusting upper nuts It will cause unexpected stress on the indoor unit and it will lead to deformation of the unit failure of attaching a panel and generating noise from the an Make sure to install the indoor unit horizontally and set the gap between the unit underside and he ceiling plane properly Improper installation may cause air leakage dew condensation water leakage and noise Even after decorative panel attached still the unit height can be adjusted finely Refer to the installation manual for decorative panel for details Make sure there is no gap between decoration panel and ceiling surface and between decoration panel and the indoor unit The gap may cause air leakage dew condensation and water leakage In case decorative panel is not installed at the same time or ceiling material is installed after the unit installed put the cardboard template for installation attached on the package packing material of cardboard box on the bottom of the unit in order to avoid dust coming into the indoor unit Refrigerant pipe Use the new refrigerant pipe When re using the existing pipe system for R22 or R407C pay attention to the following items Change the flare nuts with the attached ones JIS category 2 and reprocess the flare parts Do not use thin walled pipes Use phosphorus deoxidized copper alloy seaml
213. where you want to check room temperature The air conditioner operation follows the last operation of the remote controller regardless of the master slave setting of it The indication when power source is supplied When power source is turned on the following is displayed on the remote controller until the communication between the remote controller and indoor unit settled Master remote controller FEblliT Tn M Slave remote controller CAI Tits s At the same time a mark or a number will be displayed for two seconds first This is the software s administration number of the remote controller not an error cord Hh RE X The left mark is only an CHATI T H 77 Other marks may When remote controller cannot communicate with the indoor unit for half an hour the below indication will appear Check wiring of the indoor unit and the outdoor unit etc INSPECT 1 0 12 e SRK T 126 The range of temperature setting When shipped the range of set temperature differs depending on the operation mode as below Heating 16 30 C 55 86 F Except heating cooling fan dry automatic 18 30 C 62 86 F Upper limit and lower limit of set temperature can be changed with remote controller Upper limit setting valid during heating operation Possible to set in the range of 20 to 30 C 68 to 86 F Lower limit setting valid except heating automatic cooling fan dry Possible to set in the range of
214. xchanger temperature NO pi exchanger temperature thermistor OK thermistor YES v Check the error data vvith the remote controller Is the unit Operating in the state of NO Check refrigerant system heating overload YES gt Adjust Note 1 Judge if it is in the state of overload or not as follows A Is there any short circuit of air A Isn t there any fouling or clogging on the indoor heat exchanger A Is the outdoor fan control normal A Isn t the indoor and outdoor air temperature too high Note 2 For characteristics of indoor heat exchanger temperature thermistor see the error display E6 Reset 56 Error stop 63 Indoor heat exchanger temperature C Note During heating operation After starting compressor compressor rotation speed is decreased by detecting indoor heat exchanger temperature ThI R in order to control high pressure 12 SRK T 126 m Error code Remote controller E9 LED fen Red Indoor Ween flashing 1 time flash Drain trouble J 1 Applicable model 5 Troubleshooting All models Diagnosis Countermeasure 2 Error detection method Float switch is activated 3 Condition of Error displayed If the float switch OPEN is detected for 3 seconds continuously or if float switch connector or wire is disconnected 4 Presumable cause Defective indoor control or povver PC

12-SRK-T-126 Mar 2012 Technical Manual FDTC25-35VF

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