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SERVICE MANUAL

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1. 1 _ TO YLW S2 _ OUTDOOR UNIT ORN S3 BRN 2 T wr 1213 CL a EL at xt zz d E dz 215 als 56 LB Please set the voltage POWER POWER ing the remote controller 1 VANE using 31 1191 113 121 IS 6 For setting method RED ORN POWER _ ACONTROL GRN orto ihe nd 25 CN2D WHT CNSC BLU please refer to the indoor BCRVA OP unit Installation Manual E ZNR CN41 WIRELESS e CN90 CN51 2 WHT 222222222222 FOLAT2 T8AL LED3 LED2 LED i 9 SWE Sw2 SW1 NTAKE LIQUID PIPE REMOCON 2 52 54 CN20 CN21 CN29 CN22 CNB ON RED WHT BLK BLU OFF 112 1 2 1 2 Lf w RECEIVER LED1 LED2 SW2SW1 Refer to tables 1 and 2 Moe oe eee oq MBit 2 for service PCB A pec MM ee c eae amp R B z L 2O 1 TH2 5 16 TRANSMISSION WIRES DC12V 2 186 TB5 Table 1 Table 2 51 sw2 Service board
2. PKA A24FA PKA A30FAz PKA A36FA PKA A24FAL2 PKA A30FAL2 PKA A36FAL2 LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME PB INDOOR POWER BOARD POWER SUPPLY lt R B gt WB WIRELESS REMOTE CONTROLLER BOARD INDOOR CONTROLLER BOARD LED3 TRANSMISSION lt INDOOR OUTDOOR gt RU RECEIVING UNIT FUSE FUSE 6 3 250 C CAPACITOR FAN MOTOR BZ BUZZER ZNR VARISTOR MF FAN MOTOR LED1 LED lt RUN INDICATOR gt CN2L CONNECTOR LOSSNAY MV VANE MOTOR LED2 LED HOT ADJUST CN24 CONNECTOR BACK UP HEATING gt TERMINAL BLOCK lt INDOOR OUTDOOR SW1 SWITCH lt HEATING ON OFF gt CN30__ CONNECTOR lt LLC gt CONNECTING LINE gt SW SWITCH COOLING ON OFF gt CN32 CONNECTOR REMOTE SWITCH TB5 TB6 TERMINAL BLOCK REMOTE CONTROLLER CN41 lt TERMINAL A gt TRANSMISSION LINE gt 1 CONNECTOR CENTRALLY CONTROL THI ROOM TEMP THERMISTOR Table 1 5 1 SWITCH MODEL SELECTION XSee Table 1 lt 32 15 77 F 5 2k0 DETECT gt UT SW
3. 1 3 16 30 or more 4 1 32 102 4 3 8 111 Unit inch mm Less than 9 16 15 MODEL 36 Liquid 3 8 inch Gas pipe 5 8 inch Sleeve 1 Through hole 03 17 32 93 17 32 93 15 16 990 290 0100 51 Sleeves are available on the market 9 27 32 250 or more 8 S Less than 5 292150 Knockout hole for wirin 5 _Drainage range on__ Drainage range on A B C E _ hand side T Unit center right hand side 5 nit outline 1 316090 58 13600 00 50 1270 Eun 321132245 i zji 2a ture 12 3 1932 464946 1391 4182 11 782088 84 01 4 06 holes 35116000 DA 1 y for tapping screws JA 998218 19 32 91 1 17 82 39 12332118 1152287 5220 8 2293274 3273298 11482 8 8 EHE i i E ptu OC369E KON C A SAHS 11 58098 27322 2 5 123 14 2 31660 41 015 32 012 holes j 29 17 32 750 Rear piping hole for bolts L 1391600 EIE 12 01 4 06 holes for tapping screws 14 Range for left rear piping hole 8 WIRING DIAGRAM
4. 20 CN21 CN29 CN22 CNB ON D RED WHT BLK BLU OFF 12 112 112 112 mu 010 RECEIVER LED1 LED2 SW2SW1 Refer to tables 1 and 2 ERE for service p ee ah ee eRe a en l TH5 19 2 16 TRANSMISSION WIRES DC12V 2 B6 5 Table 1 Table 2 For A24 30 36FA 9 1 sw2 Service board MODEL Service board MODEL Service board MODEL Service board T2345 PKA P2335 12545 1234511 ui gno BB Boc Ma Rao 8888 0 The black square indicates a switch position NOTES 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting wires have polarities make sure to match terminal numbers S1 S2 S3 for correct wiring 3 Symbols used in wiring diagram above are Connector Terminal block 4 This diagram shows the wiring of Indoor and Outdoor connecting wires specification of 230V adopting superimposed system of power and signal Use copper supply wires 69 17
5. t Set screws Signal receiving P C board cover Photo 14 3 HERI Front mE panel Signal receivi P C board OC369E 40 PKA A24FA PKA A30FA PKA A24FAL PKA A30FAL PKA A36FA PKA A36FAL PKA A24FA PKA A24FAL PKA A30FAL 6 PKA A36FALi PKA A24FA PKA A24FAL2 PKA A30FAL2 6 6 2 OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 1 REMOVING THE LOWER SIDE OF THE INDOOR UNIT Figure 1 FROM THE INSTALLATION PLATE 1 Remove the 2 screws Hang the indoor unit hangers to the catches on the instal lation plate Catch of installation plate Hanger of indoor unit Metal fixture Screw REMOVING THE RIGHT SIDE PANEL Figure 2 Connector 1 Remove the 2 screws of the right side panel one on the DL Indoor controller bottom and the other on the upper right hand side 2 lt S board 2 Disconnect the connector from the adaptor case 3 Sliding the right side panel to the right pull it out toward you Terminal cover Connector Electrical parts box cover REMOVING THE INDOOR CONTROLLER BOARD Photo 1 1 Remove the right side panel T Electrical parts 2 Remove the screw of the electrical parts box cover and Tw box cover remove the cover Indoor controller j 3 Disconnect the connectors on the indoor controller board board 4 To unhook the catche
6. the table indicates the jumper wire is disco nnected Unit type setting Model JP1 Without TH5 With TH5 There is jumper 1 because these models have the cond eva temperature thermistor TH5 Indoor controller board type setting OC369E Indoor controller board type For product Service parts 34 11 SPECIAL FUNCTION 11 1 ROTATION FUNCTION AND BACK UP FUNCTION 2ND STAGE CUT IN FUNCTION 11 1 1 Operation 1 Rotation function and Back up function Outline of functions Operating the unit of main and sub alternately according to the interval setting Rotation function The setting of main sub unit depends on the refrigerant address The setting of dip switch on the outdoor unit Refrigerant address 00 Main unit Refrigerant address 01 Sub unit If an error occurs to one unit the other unit starts Back up function System constraint This function is available only by the grouping control system INDOOR UNIT OUTDOOR UNIT 1 1 of 2 refrigerant group Refer to Fig 1 It is necessary to connect remote controller crossover wiring to between units Wireless remote controller is unusable and to assign refrigerant address to each unit Dip switch on the outdoor unit Refrigerant address 00 01 Operation pattern i Back up function only Request code number 312 Error occurred on mai
7. 15kQ 9 6kQ 0 6 3kQ 20 10 0 10 20 30 40 50 5 4kQ 4 14 32 50 68 86 104122 F 4 3kQ Temperature OC369E 31 10 7 TEST POINT DIAGRAM 10 7 1 Indoor controller board PKA A12GA PKA A18GA PKA A24FA 6 PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL PKA A12GA PKA A18GA PKA A24FA PKA A36FA PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL PKA A12GA PKA A18GAz PKA A24FA2 PKA A30FAz PKA A36FAz PKA A12GAL2 PKA A18GAL2 PKA A24FAL2 PKA A30FAL2 PKA A36FALz2 LED1 LED2 CN22 Power supply Power supply R B Connect to the terminal block TB5 CN2D Remote controller connecting Connect to the wire indoor power board CN2S 12 5 13 7V DC 10 4 14 6 DC CN30 Only GA L 2 FA L 2 i Connector LLC ransmission Indoor outdoor 0 24V DC CN20 5 Room temperature thermistor TH1 21 Pipe temperature CNDK thermistor Liquid TH2 Connect to the indoor power board CNSK E CN29 208 230V AC 3 Condenser evaporator 5 temperature thermistor TH5 FUSE H LE LED3 6 3 A 250 V 45 29 Transmission Indoor outdoor 8 9 5 9 CN31 Drain sensor DS CND ac 5 SER CN90 Power supply input P 5 8 Connect to the wireless 208 230V AC EE 5 a remote con
8. 20 10 T T 10 F F 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz BAND CENTER FREQUENCIES Hz PKA A36FA 6 PKA A36FAL PKA A36FAL2 N PKA A36FAL Low 46 e e 90 I 1 I I I 1 j j 8 UNIT Tx 2 WALL 60 3 38 50 3 3ft 2 4 9 3 30 MICROPHONE 20 NRW 5 5 NOISE 63 125 250 500 1000 2000 4000 8000 BAND CENTER FREQUENCIES Hz 69 11 INDOOR UNIT PKA A12GA PKA A12GA 12 PKA A18GA PKA 18 A18GA PKA A12GAL PKA A12GALi PKA A12GAL OUTLINES AND DIMENSIONS PKA A18GAL PKA A18GAL PKA A18GAL2 Unit inch mm 28 5 32 715 Air intake 8 27 32 225 Right side Left side Front view 3 5 32 80 L 13 3 8 340 90 1
9. 2 REFERENCE MANUAL 2 1 OUTDOOR UNIT SERVICE MANUAL Service Ref Service Manual No PUZ A18 24 30 36 42NHA PUZ A18 24 30 36 42NHA BS PUY A12 18 24 30 36 42NHA PUY A12 18 24 30 36 42NHA BS OC367 PUZ HA36NHA 2 2 TECHNICAL DATA BOOK Series Outdoor unit OCH426 426 Data Book 2 5 PUY A NHA BS OCS04 PUZ HA36NHA OC369E OCS12 3 SAFETY PRECAUTION 3 1 ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminals all supply circuits must be disconnected 3 2 CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use new refrigerant pipes Use a vacuum pump with a reverse flow check valve Make sure that the inside and outside of refrige rant piping is clean and it has no contaminants such as sulfur oxides dirt shaving particles etc which are hazard to refrigerant cycle In addition use pipes with specified thickness Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc Store the piping indoors and keep both ends of the piping sealed until ju
10. Defective indoor controller board 24 Check if drain pump works Check drain function Check the setting of lead wire of drain sensor and check clogs of the filter Replace indoor controller board if drain pump operates with the line of drain sensor connector CN31 is short circuited and abnormality reappears Refer to 10 7 Turn the power off and on again to operate after check Error Code Abnormal point and detection method Cause Countermeasure Freezing overheating protection is operating Freezing protection Cooling mode The unit is in 6 minute resume prevention mode if pipe liquid or condenser evaporator temperature stays under 15 C 5 F for 3 minutes minutes after the compressor started Abnormal if it stays under 15 C 5 F for 3 minutes again within 16 minutes after 6 minute resume prevention mode Overheating protection Heating mode The units is in 6 minute resume prevention mode if pipe condenser evaporator temperature is detected as over 70 C 158 F after the compressor started Abnormal if the temperature of over 70 158 is detected again within 10 minutes after 6 minute resume prevention mode Cooling or drying mode Clogged filter reduced airflow Short cycle of air path Low load low temperature operation out of the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller boar
11. 6 PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL2 PKA A36FALz2 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Condenser evaporator temperature thermistor 5 Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection cr Flare Pipe temperature Room temperature thermistor liquid thermistor TH1 Distributor st with strainer 50 OC369E 19 10 TROUBLESHOOTING 10 1 TROUBLESHOOTING Error code display by self diagnosis and actions to be taken for service gt Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below Check the contents below before investigating details Unit conditions at service Error code Actions to be taken for service summary Displayed Judge what is wrong and take a corrective action PUR according to SELF DIAGNOSIS ACTION TABLE 10 3 The trouble is reoccurring Identify the cause of the trouble and take a corrective Not displayed action according to TROUBLESHOOTING OF PROBLEMS 10 4 Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise and etc Re check the symptom and
12. 3 Remove the electrical parts box See Photo 8 Heat exchanger 4 Remove the nozzle assembly See Photo 7 5 Remove the fan motor See Photo 9 6 Remove the pipe fixture with 2 screws See Photo 12 Set screws 7 Remove the left right screws of the heat exchanger and pull the left hand side up 8 Remove the 2 screws by sliding it toward you remove the fixture fixing bearing The fan motor is removable first when the fan removing is hard When resetting the fan to the fan motor Locate and fix the shaft after installing the fan Fixture fixing bearing 11 REMOVING THE HEAT EXCHANGER Photo 12 1 Remove the terminal block cover 2 Disconnect the connector lt yellow gt of the wireless remote controller board Remove the front panel See Photo 1 Remove the electrical parts box See Photo 8 Remove the corner box Remove the nozzle assembly See Photo 7 Remove the 2 screws and the pipe fixture Remove the 2 screws and heat exchanger Set screw 3 4 5 6 7 8 K Set screw lt Front c Em 12 REMOVING THE SIGNAL RECEIVING P C BOARD Photo 13 FOR PKA A12GAL PKA A18GAL 1 Remove the terminal block cover 2 Disconnect the connector yellow for the wireless remote controller 3 Remove the front panel See Photo 1 4 Remove the 2 screws and signal receiving P C board cover 5 Remove the signal receiving P C board
13. Weight OC369E kg Ibs 24 53 INDOOR UNIT INDOOR UNIT Service Ref PKA AS3OFA PKA A3O0FAL 0 Power supply phase cycle voltage Single phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish Munsell 3 4 7 7 0 8 Heat exchanger Plate fin coil Fan Fan drive x No Line flow direct x 2 Fan motor output kW 0 045 Fan motor F L A 0 43 Airflow Low High me min CFM Dry 15 20 530 705 Wet 14 18 480 635 External static pressure O direct blow Operation control amp Thermostat FA Wired remote controller amp built in FAL Wireless remote controller amp built in Noise level Low High 39 45 Field drain pipe 20 13 16 Dimensions 1 400 55 1 8 235 9 1 4 340 13 3 8 Weight Service Ref 24 53 6 2 PKA A36FAL 1 2 Power supply phase cycle voltage Single phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish Munsell 3 4Y 7 7 0 8 Heat exchanger Plate fin coil Fan Fan drive x No Line flow direct x 2 Fan motor output kW 0 070 Fan motor F L A 0 52 Airflow Low High m min CFM Dry 22 28 780 990 Wet 20 25 700 890 External static pressure O direct blow Operation control amp
14. room temperature 10deg Except defrosting When pipe liquid temperature or room temperature is short open temperature During drain pump operation Defective thermistor characteristics Contact failure of connector CN31 on the indoor controller board Insert failure Breaking of wire or contact failure of drain sensor wiring Defective indoor controller board 2 9 Check resistance value of thermistor 0 32 F 10 C 50 F 20 C 68 F 30 C 86 F 40 1047 1 3kQ Check contact failure of connector CN31 on the indoor controller board Refer to 10 7 Turn the power on again and check restart after inserting connector again Replace indoor controller board if drain pump operates with the line of drain sensor connector 31 and is short circuited and abnormality reappears Turn the power off and on again to operate after check Malfunction of drain pump DP Suspensive abnormality if thermistor of drain sensor heats itself and temperature rises slightly Turn off compressor and indoor fan Drain pump is abnormal if the condition above is detected during suspensive abnormality G Constantly detected during drain pump operation OC369E Malfunction of drain pump Defective drain Clogged drain pump Clogged drain pipe Attached drop of water at the drain sensor Drops of drain trickles from lead wire Clogged filter is causing wave of drain
15. 8 Unhook the top of the indoor unit from the back plate catch Figure 2 2 Square hole Figure 1 Figure 2 1 2 REMOVING THE FRONT PANEL 1 Open the front grille 2 Remove the terminal block cover with a screw 3 Remove the 3 screw caps then remove the 3 set screws 4 After removing the lower side of the front panel a little remove it as pulling toward upper Figure 3 Terminal block cover Photo 1 3 REMOVING THE INDOOR CONTROLLER BOARD 1 Remove the terminal block cover 2 Remove the front panel See Photo 1 3 Remove the electrical parts box 2 screws 4 Remove the electrical parts box cover 1 screw 5 Disconnect the connector on the controller board and remove the controller board by pulling up the hook of the controller case For smooth works hang the side hooks of the electrical parts box on the hook of the motor cover See Photo 3 OC369E 38 Photo 3 7 Electrical parts box OPERATION PROCEDURE 4 REMOVING THE POWER BOARD 1 Remove the front panel See Photo 1 2 Remove the electrical parts box 2 screws See Photo 2 3 Disconnect the whole connector in the control board 4 After lifting the controller case with pressing its convex section remove the controller case and the control board simultaneously See Photo 3 5 Disconnect the connector in the power board 6 Remove the power board
16. Disconnect the vane motor connector on the indoor control ler board Vane motor Indoor controller board Removing the intake grilles 1 Remove the right side panel Figure 3 2 To remove the left side panel remove the screw on the bot tom and the screw on the upper left hand side See Figure 3 1 Press up this side of the left side panel to unhook the catch on the panel from the catch on the unit 2 Slide the left side panel to the left to remove the panel Note Fix the unit to the metal fixture securely 3 Remove the air filters 4 Hold and press the centre cover to remove Photo 5 5 Remove the screws of the grills Left side panel Slide to the 6 Pull the lower side of the grille toward you and slide the __ fight Grills upper side to the right to remove the grilles 5 Screws for grills Catch on the left side panel Catch on the unit T n 1 Removing the drain pan Photo 6 Drain hose Remove the left and right side panels Drain pan Remove the grilles Remove the electrical parts box cover 4 Loosen the drain hose band to remove A Remove the 3 screws of the drain pan and slide the drain o a pan toward you to remove Screws Drain hose OC369E 42 OPERATING PROCEDURE PHOTOS 8 Removing the line flow fan and the fan motor 1 Remove the left and right side panels
17. LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME PB INDOOR POWER BOARD LED2 SUPPLY RB WB WIRELESS REMOTE CONTROLLER BOARD B INDOOR CONTROLLER BOARD LED3 TRANSMISSION INDOOR OUTDOOR RU RECEIVING UNIT FUSE FUSE 6 3A 250V C CAPACITOR lt FAN BZ BUZZER ZNR 5 MF FAN MOTOR LED1 LED lt RUN INDICATOR gt lt 1055 gt MV VANE MOTOR LED2 LED HOT ADJUSTS CN24 CONNECTOR lt BACK UP HEATING TERMINAL BLOCK lt INDOOR OUTDOOR SW1 SWITCH HEATING ON OFF gt CN30 CONNECTOR LLC CONNECTING LINE gt SW2 SWITCH COOLING ON OFF gt CN32 CONNECTOR REMOTE SWITCH TB5 TB6 TERMINAL BLOCK lt REMOTE CONTROLLER CN41 lt TERMINAL A gt TRANSMISSION LINE gt CN51 CONNECTOR CENTRALLY CONTROL ROOM TEMP THERMISTOR SWi SWITCH MODEL SELECTION gt See Table 1 lt 32 F 15kQ 77 F 5 2k0 DETECT gt SW2 SWITCH CAPACITY CODE gt xSee Table 2 TH2 PIPE TEMP THERMISTOR LIQUID Table 1 SWE SWITCH lt EMERGENCY OPERATION gt lt 32 F 15kQ 77 F 5 2kO DETECT gt Swi X4 _ RELAY FAN MOTOR gt TH5 COND EVA TEMP THERMISTOR Serice board BCR CONTROL ELEMENT lt 32 F 15kQ 77 F 5 2kO DETECT gt LED SUPPLY lt I B gt RB WIRED REMOTE CONTROLLER BOARD 2345 P B CNSK CN2S Please set the voltage Table 2 RED WHT using the remote controller SW2 1 1 For the setting manor MODEL Service board MODEL Service board
18. NOTE It is necessary to set the same content to both main unit and sub unit Every time indoor controller board is replaced for servicing it is necessary to set each function 1 Request Code List Rotation setting Setting No Setting contents Initial Request code setting Monitoring the request code of current setting Rotation and Back up OFF Normal group control operation Back up function only Rotation ON Alternating interval 1day and back up function Rotation ON Alternating interval 3days and back up function Rotation ON Alternating interval 5days and back up function Rotation ON Alternating interval 7days and back up function Rotation ON Alternating interval 14days and back up function Rotation ON Alternating interval 28days and back up function 2nd stage setting Setting No Initial Request code Setting contents setting Monitoring the request code of current setting Cut in function OFF Cut in function ON Set point Set temp 4 C 7 2 F Cut in function ON Set point Set temp 6 C 10 8 F Cut in function ON Set point Set temp 8 C 14 4 F OC369E 36 222 2 Setting method of each function by wired remote controller JMMISUBISHELECTRIC 7 B Refrigerant address amp E C Data display area D Request code d
19. O 12345 PKA 12345 2 unit Installation Manual ON ON 3 lal M M jore alla M The black square indicates a switch position 1 JORN D Sis E L UTDOOR YLW 52 UNIT ORN S3 BRN D D 9 1 1 2 3 e a zz ig 5 5 as 5 POWER POWER FAN ODK CND 66 p M WHT 11315 RED 3 ORN IT ST dowel M o TR RED ORN 3 j POWER A CONTROL o MV 0 aan O BORVA 924 FOMANBGAL ZNR CNA1 WHT CN2L RED 9 o 106 69 9 4 1 2 1 AL LED3 LED2 LED1 CN51 WHT CN32 WHT 10001 wpELESS O CNB 5 1 1 3 swe swt INTAKE LIQUID PIPE REMOCON RU ere A 0420 1 CN29 CN22 RECEIVER LED LED2 SW2SW1 on 5 4 RED WHT BLK BU 3494 oL Ll Jp FF 2 12 12 1 2 1 B 1 JE a a a M A tLe Sy ee Aes Refer to tables 1 and 2 RB for service PCB 1 1 t t t gt TRANSMISSION WIRES DC12V 5 TH1 TH2 TH5 TB5 TB6 EA ae PEN For A12 18GA NOTES 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting
20. 09MPa G or over Electronic scale Gas leak detector Use the detector for R134a R407C or R410A Adaptor for reverse flow check Attach on vacuum pump Refrigerant charge base Refrigerant cylinder Only for R410A of cylinder Pink Cylinder with syphon Refrigerant recovery equipment OC369E 4 4 PART NAMES AND FUNCTIONS e Indoor Unit PKA A12GA Filter Air intake grille PKA A18GA Air intake PKA A12GAL PKA A18GAL PKA A12GA PKA A18GA PKA A12GAL PKA A18GALi 12 18 PKA A12GAL PKA A18GAL Auto vane Guide vane Air outlet e Indoor Unit PKA A24FA 6 Filter PKA A24FAL Removes dust and dirt Air intake grille PKA A30FAL Air intake from the intake air PKA A36FAL Room air is suctioned PKA A24FA yi gt S PKA A30FA g 2 6 PKA A24FAL PKA A30FAL v PKA A36FAL Airflow be changed Auto vane 6 to horizontally by moving Disperse airflow up and PKA A24FAL gt the guide vane to the left Air outlet Air outlet down as well as adjusts the or right angle of airflow direction PKA A30FAL2 PKA A36FAL2 OC369E 5 e Wired remot
21. 2 Remove the grills 3 Remove the electrical parts box 4 Remove the drain pan 5 Loosen the screw that fixes the line flow fan to the fan motor See Photo 7 6 Remove the 4 screws of the motor fixture and remove the fan motor and the motor fixture at a time See Photo 8 7 Remove the screws of the left and right motor supports and remove the motor supports and the fan motor See Photo 9 8 Remove the 2 screws on the left and right sides of the heat exchanger and pull the bearing support toward you See Photo 11 9 Remove the screw of the centre support and remove the support See Photo 10 10 Pull the left hand side of the heat exchanger toward you and remove the line flow fan Photo 11 Heat exchanger Bearing support P Lineflow fan OC369E 43 Line flow fan Screw Fan motor Photo 8 Fan motor Motor fixture Photo 9 Screw Motor support By Motor support Photo 10 Line flow fans Centre support Screw Photo 12 Heat exchanger Heater element Heater fixing screws 13 RoHS PARTS LIST ELECTRICAL PARTS PKA A12GA PKA A12GAL PKA A12GA PKA A12GAL2 PKA A18GA PKA A18GAL 18 PKA A18GAL2 Part number that is circled is not shown in the figure Q ty set Remarks Wiring Recom Parts No Parts Name Specifications PKA A12 18 Drawing No Diagram mended GA GAL GA GAL2 gO Symbol 1 2 T7W H28
22. 330 and press the FILTER button Example When the current setting is Setting No 2 Request code 311 311 appears on the screen at 7 To return to normal mode press the button 11 2 BACK UP HEATING FUNCTION CN24 11 2 1 Operation Outline of functions The back up heater signal is sent out according to the temperature Temperature difference Back up heater Z Set temp Room temp signal output 1 25 0 OFF difference between indoor room temperature and set temperature 0 lt Z lt 2 5 C 4 5 F Keeping condition This function is available only in heating operation 2 55 4 5 Z N 11 2 2 How to connect When connecting to the connector CN24 of the indoor unit use PAC SE56RA E optional parts 2 0 OFF OC369E 37 PKA A12GA PKA A18GA PKA A12GA PKA A12GAL PKA A18GAL PKA A12GAL OPERATION PROCEDURE PKA A18GA PKA A18GAL PKA A12GAL2 PKA A18GAL 12 DISASSEMBLY PROCEDURE PKA A12GA 18 PHOTOS amp ILLUSTRATION 1 REMOVING THE LOWER SIDE OF THE INDOOR UNIT FROM THE INSTALLATION PLATE 1 Remove the left right corner box of the indoor unit 2 Hold and pull down the lower and both ends of the indoor unit and remove the section from the square hole Refer to Figure 2 1 Or remove the front panel and push the section down by using hexagonal wrench from the front side Refer to Figure 2 2
23. ROOM TEMPERATURE THERMISTOR TH1 CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR 4 45 FAN MOTOR RUBBER MOUNT RIGHT LINEFLOW FAN BEARING MOUNT SLEEVE BEARING FAN GUARD SLEEVE BEARING FUSE 6 3A 250V Part No Part Name Specification RoHS G G G G G G TH5 TH2 MF ee ee ee a b N d d OC369E 47 RoHS PARTS LIST ELECTRICAL PARTS PKA A36FA PKA A36FAL 6 PKA A36FAL2 Q ty set Remarks Wiring Recom Part No Part Name Specification PKA A36 Diagram mended Drawing No Symbol RoHS FA FAL FA2 FAL BEARING MOUNT LEFT LINEFLOW FAN HEAT EXCHANGER DRAIN PAN CENTER COVER JOINT SHAFT AUTO VANE DRAIN HOSE VANE MOTOR WIRELESS ADAPTER CONTROLLER BOARD CAPACITOR 2 5F 440V INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD re OO ee Se Se Se Se e ee ee ee 0 0 0 0 0 Continued to the next page OC369E 48 RoHS PARTS LIST From the previous page Q ty set Wiring Remarks Diagram Drawing No Symbol Part No Part Name Specification PKA A
24. Thermostat FA Wired remote controller amp built in FAL Wireless remote controller amp built in Noise level Low High 46 49 Field drain pipe 1 0 20 13 16 Dimensions 1 680 66 1 8 235 9 1 4 340 13 3 8 Weight OC369E 28 62 10 6 NOISE CRITERION CURVES PKA A12GA 12 PKA A24FA 24 PKA A12GAL PKA A12GAL2 PKA A30FA PKA A18GA 18 PKA A24FAL PKA A24FAL2 PKA A18GAL PKA A18GAL2 PKA A30FAL PKA A30FAL2 PKA A12GA NOTCH SPL aB LINE PKA A24FA4 PKA A12GAL d a PKA A18GA meum Si ee PKA A24FAL 45 PKA A18GAL Low 36 PKA A30FAL Low 39 ee 90 3 Ee 1 A d 90 1 3t s 1 m AME E ne m Ei RQ DNE RQ a Oe Gee a So B oS LIP Ig 5 C F 4 fo i N G 4 S i 25 2 8 t 40 a PON Ten CONTINDOUS 1 1 f NY CONTINUOUS
25. When RC is displayed d When ERC 00 06 is displayed c d Noise may be causing abnormality f the unit is not normal after replacing indoor controller board in group control the indoor controller board of address 0 may be abnormal Remote controller transmission error E3 signal receiving error E5 Abnormal if remote controller could not find blank of transmission path for 6 sec onds and could not transmit Error code E3 Remote controller receives transmitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code E3 Abnormal if indoor controller board could not find blank of transmission path Error code E5 Indoor controller board receives trans mitted data at the same time compares the data and when detecting it judges different data to be abnormal 30 continuous times Error code E5 OC369E 2 remote controller are set as main In case of 2 remote controllers Remote controller is connected with 2 indoor units or more Repetition of refrigerant address Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board Noise has entered into trans mission wire of remote controller 26 Set a remote controller to main and the other to sub Remote controller is connected with only 1
26. e 5 for P5 the check code in the following table Output pattern B Only A CONTROL Beepersounds Beep Tl T TR Beep Beep oe _ Repeated INDICATOR lamp blinking lt gt og On On On Of On On pattern Self check Approx 2 5 sec Approx 3 sec 0 5 sec 0 5 sec 0 5 sec 0 5 Approx 2 5 sec Approx 3 sec 0 5 0 5 sec starts S v J _ Start signal V received Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern indicates code in the following table i e 5 for U2 the check code in the following table Output pattern A Errors detected by indoor unit Wireless remote controller Wired remote controller Beeper sounds OPERATION INDICATOR lamp blinks O Check code Number of times 1 P1 Intake sensor error 2 P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error 5 P5 Drain pump error PA Forced compressor stop due to water leakage abnormality 6 P6 Freezing Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 4 E5 Remote controller signal receiving error 10 11 12 Fb Indoor unit control system error memory error etc ES EO E3 Remote controller transmission error E1 E2 Remote controller control board error Output pattern Errors detected by unit
27. indication all parts of the display are shown Shows the current day of the week Displayed when the remote controller During actual operation only sensor is used the relevant items will be lit Time Timer Display Shows the current time unless the simple or Auto Off Locked indicator set TM Indicates that remote controller but If the simple or Auto Off timer is set the time to be tons have been locked Switched off is shown Identifies the current operation Shows the operating mode etc 7 Clean The Filter indicator Multilanguage display is available EA MITSUBISHI ELECTRIC To be displayed on when itis time to TIME SUN TUE WED THU FRI E clean the filter LL did BE AFTER NT gi arter de agro DS ELATI Cee uio Timer indicators Centrally Controlled indicator E n 1i 1 111 F C WEEKLY The indicator comes on if the corre Indicates that operation from the SJ L CINICI Tu d 388 4 AUTO OFF J sponding timer is set remote controller has been prohib dindi ited by a master controller an Speed indicator Shows the selected fan speed iu Air Direction indica Room Temperature display Ventilation indicator or ows the room temperature The room TERES Ti i indi 3 Appears when the unit is running in timer TOIT indicator The indicator N shows the direc temperature display range is 46 102 F mode 2 Indicate
28. it has been reset normally Constantly detected during cooling drying and heating operation Short 90 1947 or more Open 40 407 or less Defective thermistor characteristics Contact failure of connector CN20 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective indoor controller board 9 Check resistance value of thermistor oC 10 C 50 F 20 C 68 F 30 C 86 F 40 C 104 F If you put force on draw or bend the lead wire with measuring resistance value of thermistor breaking of wire or contact failure can be detected Check contact failure of connector CN20 on the indoor controller board Refer to 10 7 Turn the power on again and check restart after inserting connector again Check room temperature display on remote controller Replace indoor controller board if there is abnormal difference with actual room temperature Turn the power off and on again to operate after check Pipe temperature thermistor Liquid TH2 The unit is 3 minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after 3 minutes The unit returns to normal operation if it has been reset normally Constantly detected during cooling drying and heating except defrosting operation Short 90 C 194 F or more Open 40 407 or less Defective thermist
29. operation Do not use it for normal operation VANE CONTROL button Changes the air flow direction OC369E ON OFF TEMP Lights up while the signal is transmitted to the indoor unit when the button is pressed Temperature setting display Indicates the desired temperature setting which is set CLOCK display Displays the current time TIMER display Displays when in timer operation or when setting timer 4 9 1 display Displays the order of timer operation gt display Displays whether timer is or off CHECK TEST VS Li ER START AMPM N HEB EH NOT AVAILABLE o AUTO STOP O O AUTO START 6 13 E buttons Sets any desired room temperature TIMER CONTROL buttons AUTO STOP OFF timer when this switch is set the air conditioner will be automatically stopped at the preset time AUTO START ON timer when this switch is set the air conditioner will be automatically started at the preset time h and min buttons Buttons used to set the hour and minute of the current time and timer settings LOUVER button Changes left right airflow direction CLOCK button RESET button SET butt
30. or normally from other indoor controller board for 3 minutes Error code E4 Indoor controller board cannot receive any signal from remote controller for 2 minutes Error code E4 Q Contact failure at transmission wire of remote controller All remote controllers are set as sub remote controller In this case EO is displayed on remote controller and E4 is displayed at LED LED1 LED2 on the outdoor controller circuit board Miswiring of remote controller Defective transmitting receiving circuit of remote controller Defective transmitting receiving circuit of indoor controller board of refrigerant address 0 Noise has entered into the transmission wire of remote controller Check disconnection or looseness of indoor unit or transmission wire of remote controller Set of the remote controllers main if there is no problem with the action above G Check wiring of remote controller Total wiring length max 500m Do not use cable x 3 or more The number of connecting indoor units max 16 units The number of connecting remote control ler max 2 units When the above mentioned problem are not seen Diagnose remote controllers a When RC OK is displayed remote controllers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When is displayed replace remote controller c
31. other than indoor unit outdoor unit etc Wireless remote controller remote controller Beeper sounds OPERATION INDICATOR lamp blinks Check code Number of times Symptom Remark Indoor outdoor unit communication error 1 E9 Transmitting error Outdoor unit 2 UP Compressor overcurrent interruption 3 03 04 Open short of outdoor unit thermistors 4 UF Compressor overcurrent interruption When compressor locked 5 U2 Abnormal high discharging temperature 49C operated insufficient refrigerant As for outdoor 6 U1 Ud Abnormal high pressure 63H operated Overheating unit refer to protection operation outdoor unit s 7 U5 Abnormal temperature of heatsink service manual 8 U8 Outdoor unit fan protection stop For details check 9 U6 Compressor overcurrent interruption Abnormal of power module the LED display 10 U7 Abnormality of superheat due to low discharge temperature of the outdoor 11 U9 UH Abnormality such as overvoltage or voltage shortage and controller board abnormal synchronous signal to main circuit Current sensor error 12 13 14 Others Other errors Refer to the technical manual for the outdoor unit 1 If the beeper does not sound again after the initial 2 beeps to confirm the self check start signal was received and the OPERATION INDICATOR lamp does not come on there are no error records 72 If the beeper sounds 3 times continuou
32. specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions Ventilate the room if refrigerant leaks during operation If refrigerant comes into contact with a flame poisonous gases will be released 1 Perform service after recovering the refrigerant left in unit completely 2 Do not release refrigerant in the air 3 After completing service charge the cycle with specified amount of refrigerant 4 When performing service install a filter drier simultaneously Be sure to use a filter drier for new refrigerant OC369E 3 2 Additional refrigerant charge When charging directly from cylinder Check that cylinder for R410A on the market is syphon type Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase Gravimeter 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant Tool name Specifications Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over Charge hose Only for R410A Use pressure performance of 5
33. the dip switch and the jumper wire on control P C board SW1 SW2 are equipped only for service parts Model setting and capacity setting are memorized in the nonvolatile memory of the control P C board of the unit Marks in the table below Jumper wire Short X Open Jumper wire Functions Setting by the dip switch and jumper wire Remarks For service board PKA A12 18GA 0 ON 12 18 OFF Model settings PKA A24 30 36FA 2 ON PKA A24 30 36FAL 0 OFF MODELS PKA A12GA 12 Service board 12345 ON PKA A12GAL 1 2 BB or PKA A18GAq 0 18 1 2 PKA A24FAq 0 24 1 ON OFF 4 Capacity settings ON OFF ON 1 0 OFF PKA AS3G6FA 0 PKA A36FAL 12 ON OFF 5 E 5 E 5 E 5 E lt lnitial setting gt Wireless remote controller 0 Pair number setting with wireless remote controller Wireless remote Control PCB setting controller setting J41 J42 Control PCB O for both J41 and J42 Four pair number settings are supported The pair number settings of the wireless remote controller and indoor control PCB J41 J42 are given in the table on the left
34. 1 1 32 280 9 3 16 233 Less than 19 32 15 25 Air intake Air intake Knockout hole for left piping Refrigerant pipe Drain pipe Wiring hole g 3 LY a L d Knockout hole for right piping 2 3 8 60 34990 Auto vane Refrigerant pipe Drain pipe Wiring hole Lower side 27 3 4 705 Air outlet 9 1 4 235 5 16 1 1 9 16 4 12 Louvers manual 8516160 1 116 40 _ f Knockout hole for under piping a Refrigerant piping Drain pipe LLLILLLI 11111 1 Wing hole ____ 2 9 4 70 1 3 8 35 1 31 32 50 5 7 15 32 190 15 3 4 400 gt 15 9 16 395 Service panel Power supply access Front view the open topped grille view opertopped gile Wiring entrance holes 11 Ai 83 5 us LS a Ji 1 Left side piping 22 1858 3 16 6 1516533 ES 12895 installation 17111849 139889 Drain hose 27 9 16 700 6 1 32 153 mes Flexible hose total length 31 1 2 800 Right side piping installation iquid pipe 2 Gas pipe Service space required around indoor unit Details of installation plate Installation plate ight side balance point hole ipu uS une de it center 8s 866 E 8 9587 628 3 S e 89 8928 2 oe PAP 9 8 5 5 5 5 14 99 16 14 holes mop 4n PER Ee 8 for bolts S 49 93 16 d5 holes rs 2 for tapping screw 3 5 32 80
35. 1 High 9 10 11 12 320 350 390 425 Wet 8 9 10 11 290 315 350 380 External static pressure Pa mmAq O direct blow 2 oc a 2 INDOOR UNIT Operation control amp Thermostat GA Wired remote controller amp built in GAL Wireless remote controller amp built in Noise level Low High dB 36 38 41 43 Field drain pipe mm in 20 13 16 Dimensions mm in 990 39 235 9 1 4 mm in mm in 340 13 3 8 Weight Service Ref kg Ibs 16 35 PKA A24FA 2 PKA A24FAL 0 Power supply phase cycle voltage Single phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish Munsell 3 4 7 7 0 8 Heat exchanger Plate fin coil Fan Fan drive x No Line flow direct x 2 Fan motor output kW 0 045 Fan motor F L A 0 43 Airflow Low High 15 20 530 705 Wet 14 18 480 635 External static pressure Pa mmAq O direct blow Operation control amp Thermostat FA Wired remote controller amp built in FAL Wireless remote controller amp built in Noise level Low High dB 39 45 Field drain pipe mm in 20 13 16 Dimensions mm in 1 400 55 1 8 mm in 235 9 1 4 340 13 3 8
36. 2 SWITCH CAPACITY Table 2 TH2 PIPE TEMP THERMISTORILIQUID 2 SWE SWITCH EMERGENCY OPERATION lt 32 15 77 F 5 2k0 DETECT gt Service board X4 RELAY lt FAN MOTOR gt TH5 COND EVA TEMP THERMISTOR 12345 BCR CONTROL ELEMENT lt 32 F 15k0 77 F 5 2kO DETECT gt ON LEDI POWER SUPPLY lt I B gt RB WIRED REMOTE CONTROLLER BOARD Table 2 CNSK CN2S Please set the voltage Swe RED wa using the remote controller For the setting method O DC13 1V 5607 17 please refer to the indoor PKA 12345 3 12 unit Installation Manual A24FA L BB gd os MODEL Service board 12345 v Ma ORN cm 15 MODEL Service board E 12345 _ YLW SoL OUTDOOR roan faq UNT A36FA L niall MF BRN 522 The black square indicates a switch position 1 11213 c al at t zz 516 dz SS 6 FAN oc M WHT 1 3 5 RED 3 OR 113 1 21 3 SCT POWER A CONTROL CN6V MV BCR YA E BLU GRN A o For A24 30 36FAL ZNR CNA1 WHT CN2L RED 1 9 79 ESI EE 1 o 4 1 2 1 LED3 LED2 LED1 CN51 WHT CN32 WHT CNB 5 a dn 3 BL E SWE SWI CN24 INTAKE LIQUID PIPE REMOCO CN30 RU CN20 CN
37. 21 CN29 22 RECEIVER LED1 LED2 Sw2Swi Se Bk 489 WE or 2 12 12 12 1 E Eu 00 00 Oro pum E 5 2 Refer to tables 1 and 2 jm RB for service 4 1 1 t t t 2 TRANSMISSION WIRES DC12V 5 TH1 TH2 TH5 i TB5 TB6 hie a ae Sa a FR BA a NOTES For A24 30 36FA 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting wires are made with polarities make wiring matching terminal numbers S1 S2 S3 3 Symbols used in wiring diagram above are o oo Connector Terminal blo ck 4 This diagram shows the wiring of Indoor and Outdoor connecting wires specification of 230V adopting superimposed system of power and signal Use copper supply wires Self diagnosis Plea se refer to technical manuals etc OC369E 18 9 REFRIGERANT SYSTEM DIAGRAM PKA A12GA PKA A18GA PKA A24FA 6 PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL PKA A12GA PKA A18GA PKA A24FA PKA AS36FA PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA AS36FAL PKA A12GA PKA A18GA PKA A24FA
38. 36 RoHS FAL FAL INDOOR POWER BOARD 1 111 TERMINAL BLOCK 2P 1 2 1 TB5 TERMINAL BLOCK 3P S1 S2 S3 1 4 TERMINAL BLOCK 3P L1 L2 GR TB2 ROOM TEMPERATURE THERMISTOR TH1 CONDENSER EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR FAN MOTOR PN4N70 K RUBBER MOUNT RIGHT LINEFLOW FAN BEARING MOUNT SLEEVE BEARING FAN GUARD SLEEVE BEARING FUSE 6 3A 250V G G G G G G TH5 TH2 MF m om b k N ah ee N N m m N OC369E 49 RoHS PARTS LIST STRUCTURAL PARTS PKA A12GA 12 PKA A18GA 18 PKA A12GAL PKA A12GAL PKA A18GAL PKA A18GALz2 Q ty set Parts No Parts Name Specifications PKA A12 18 Drawing No Diagram mended GAVGA2 GAL GAL2 Symbol Q ty R01 08Y 808 BACK PLATE 1 1 R01 08Y 658 CORNER COVER L R01 08 623 UNDER COVER R01 E05 651 FRONT PANEL R01 08 096 SCREW CAP RO1 08Y 092 VANE SLEEVE R01 08 691 FRONT GRILLE R01 A32 500 FILTER RO1 08Y 002 AUTO VANE R01 E18 658 RECEIVING UNIT R01 10 658 CORNER COVER R 01 08Y 635 BOX ASSEMBLY T7W 09 714 WIRELESS REMOTE CONTROLLER 01 03 049 WIRELESS REMOTE CONTROLLER DOOR RO1 00 075 WIRELESS REMOTE CONTROLLER HOLDER T7W E14 713 WIRED REMOTE CONTROLLER
39. 480 HEAT EXCHANGER R01 E22 114 LINE FLOW FAN R01 08 102 BEARING MOUNT E04 103 SLEEVE BEARING RO1 08 106 BEARING SUPPORT A01 675 GUARD R01 08 524 DRAIN PLUG 08 527 DRAIN HOSE 01 08 530 NOZZLE 01 10Y 038 GUIDE 01 08 038 GUIDE VANE R01 08 059 E14 223 MOTOR RO1 06 317 WIRERLESS ADAPTER CONTROLLER BOARD R01 08 135 MOTOR COVER RO1 08 105 RUBBER MOUNT E30 762 MOTOR PM4V30 K 1 1 1 1 1 1 1 1 1 4 10 N N RoHS Continued to the next page OC369E 44 RoHS PARTS LIST From the previous page Parts No Parts Name Specifications Q ty set PKA A12 18 IGAL Remarks Drawing No Recom mended Q ty T7W E41 716 TERMINAL BLOCK 3P L1 L2 GR 1 R01 E18 246 TERMINAL BLOCK 3P S1 S2 S3 T7W E17 255 CAPACITOR 2 04F x 440V T7W E56 310 INDOOR CONTROLLER BOARD 1 1 1 T7W E70 310 INDOOR CONTROLLER BOARD T7W 5 313 POWER BOARD R01 E21 246 TERMINAL BLOCK 2 1 2 01 48 246 TERMINAL BLOCK 2P 1 2 R01 H11 202 CONDENSERIEVAPORATOR TEMPERATURE THERMISTOR R01 H08 202 ROOM TEMPERATURE THERMISTOR R01 N18 202 ROOM TEMPERAT
40. 8 RIGHT SIDE PANEL E14 WIRED REMOTE CONTROLLER E00 WIRELESS REMOTE CONTROLLER HOLDER E03 WIRELESS REMOTE CONTROLLER DOOR E08 WIRELESS REMOTE CONTROLLER E04 BACK PLATE E20 TOP PLATE 18G INTAKE GRILLE 0 RoHS E02 OC369E DRAIN SOCKET 52 OC369E 53 Mir MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2006 MITSUBISHI ELECTRIC CORPORATION Distributed in Mar Distributed in Apr Distributed in Oct 2013 2009 2007 Distributed in Jun 2007 Distributed in Aug Distributed in Feb 2006 2006 No OC369 REVISED EDITION E No OC369 REVISED EDITION D PDF 7 No OC369 REVISED EDITION C PDF 9 No OC369 REVISED EDITION B PDF 9 No OC369 REVISED EDITION A PDF 9 No OC369 PDF 10 New publication effective Mar 2013 Specifications are subject to change without notice
41. ACITY CODE gt See Table 2 TH2 PIPE TEMP THERMISTOR LIQUID SWE SWITCH lt EMERGENCY OPERATION gt 327 15 77 5 2 0 DETECT gt X4 RELAY lt FAN MOTOR gt H5 COND EVA TEMP THERMISTOR BCR FAN CONTROL ELEMENT 327 15 77 5 2 0 DETECT gt LED1 POWER SUPPLY I B RB WIRED REMOTE CONTROLLER BOARD LED2 POWER SUPPLY lt R B gt LED3 TRANSMISSION lt INDOOR OUTDOOR gt P B CN2S Please set the voltage RED WHT using the remote controller 1 1 For the setting method 2 06134 please refer to the indoor unit Installation Manual YLW x1 ORN 1 YLW 2 _ ORN 83 V BRN o9 11213 CL a EL at gt ig HE 56 ds 56 HHRH POWER FAN 1315 OB CEU 6 WHT RED ORN N POWER ACONTROL GRN wv po S cN2D WHT CN3C BLU BCRVA X4 m CN41_ WIRELESS 4 CN90 CN51 2 WHT For A2 4 8 0 36FAL LED3 LED2 LED i 9 gwe SW2 NTAKE LIQUID PIPE REMOCON
42. Less than 5 1 8 130 5 1 8 130 5 29 32 150 or more L N 1 31 32 50 or more clearance or unit installation 1 Sleeves are available on the market 2 This size shows the lower end of through hole OC369E MODEL 12 18 rid 7 BENT Sleeve 1 Through hole ppg nore S Liquid pipe 1 4 inch o2 5 875 28 1516 23 582 275 080 Knockout hole for 5 Gas pipe 1 2 inch left rear piping 7 12 7 15 32 190 9 1 16 230 10 23 32 272 12 7 32 310 04 12 11 16 322 right rear piping Knockout hole for Right rear piping hole 16 23 32 425 INDOOR UNIT PKA A24FA PKA A30FA PKA A24FAL PKA A30FAL PKA A24FA PKA A30FA PKA A24FAL PKA AS3OFAL PKA A24FA2 PKA A30FA2 PKA A24FAL2 PKA A30FAL2 Top side EEEB EEER EEERB EEER 914635 9 495 9 t 4 235 1 252 45 1253245 1225 3245 Front view SES Right side Left side 42 29 32 1090 Air intake for left pipin Drain hose for left hand side pipin Auto vanes 44 3 32 1120 Drain hose Wiring entrance holes 43 11 16 1110 Drain hose Louvers Manual 9 7 16 240 Lower side 21 23 32 552 AAir outlet 21 23 82 552 Air outlet Under panel Removable at left hand side pipin K
43. MITSUBISHI ELECTRIC SPLIT TYPE HEAT PUMP AIR CONDITIONERS SPLIT TYPE AIR CO NDITIONERS SERVICE MANUAL Series PKA Indoor unit Model names PKA A12GA PKA A18GA PKA A24FA PKA A30FA PKA A36FA PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL Wall Mounted Service Ref PKA A12GA PKA A18GA PKA A24FA PKA A30FA PKA A36FA PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL Changes for the Better R410A PKA A12GA PKA A18GA PKA A24FA PKA A36FA PKA A12GAL PKA A18GAL PKA A24FAL PKA A30FAL PKA A36FAL March 2013 No OC369 REVISED EDITION E Revision The indicated No of PKA A12GA2 CORNER COVER page 50 in the illustration have 18 been corrected in REVISED 24 pulos Lic PKA A30FA2 Please void OC369 REVISED EDTION D PKA A36FA PKA A12GAL PKA A18GAL2 PKA A24FAL gt PKA A36FAL NOTE This manual describes only service data of the indoor units RoHS compliant products have mark on the spec name plate For servicing RoHS compli ant products refer to the RoHS PARTS LIST INDOOR UNIT PKA A12GA PKA A18GA PKA A12GAL PKA A18GAL WIRED REMOTE CONTROLLER 1 2 3 4 Model name indication 5 6 7 8 WIRELESS REMOTE CO
44. MODELS Service board MODELS Service board 12345 PKA 12345 12345 ON ON ON ceno Ba Rao The black square indicates a switch position NOTES 1 Since the outdoor side electric wiring may change be sure to check the outdoor unit electric wiring for servicing 2 Indoor and outdoor connecting wires have polarities make sure to match terminal numbers S1 S2 S3 for correct wiring 3 Symbols used in wiring diagram above are Connector Terminal block 4 This diagram shows the wiring of Indoor and Outdoor connecting wires specification of 230V adopting superimposed system of power and signal 1 Use copper supply wires OC369E 15 PKA A12GA PKA A18GA PKA A12GAL2 PKA A18GAL2
45. NTROLLER 10 11 12 13 Intertek 33223 CONTENTS TECHNICAL CHANGES 4 2 2 REFERENCE MANUAL 2 SAFETY PRECAUTION ern 3 PART NAMES AND FUNCTIONS 5 SPECIFICATIONS S nene 9 NOISE CRITERION CURVES 11 OUTLINES AND DIMENSIONS 12 WIRING ennnen n 15 REFRIGERANT SYSTEM 19 TROUBLE SHOOTING 22772 1177111 20 SPEGIAINEUNGTIONS RR 35 DISASSEMBLY 38 RoHS see 44 fir SLIM PKA A12GA 12 PKA A18GA 18 PKA A24FA PKA A24FA PKA A30FA PKA A30FAz PKA A12GALi PKA A12GAL PKA A18GALi PKA A18GAL PKA A24FAL 24 2 PKA A30FAL PKA A30FALz2 gt gt gt gt PKA A36FA 6 gt gt gt gt PKA A36FAL gt 6 2 Indoor controller board PKA A12GA PKA A12GA PKA A18GA PKA A18GA PKA A24FA PKA A24FA PKA ASOFA PKA A12GAL PKA A12GAL PKA A18GAL PKA A18GAL PKA A24FAL PKA A24FAL PKA A30FAL PKA A30FAL PKA A36FAL PKA A36FAL Indoor controller board has been changed gt gt gt gt PKA A36FA PKA AS36FA gt gt gt gt gt 1 TECHNICAL CHANGES has been changed 11 SPECIAL FUNCTION is added
46. PKA A12GA PKA A18GA PKA A12GAL PKA A18GAL PKA A12GA PKA A18GA PKA A12GAL PKA A18GALi LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME PB INDOOR POWER BOARD C CAPACITOR FAN MOTOR gt W B WIRELESS REMOTE CONTROLLER BOARD INDOOR CONTROLLER BOARD MF FAN MOTOR RU RECEIVING UNIT FUSE FUSE 6 3A 250V MV VANE MOTOR BZ BUZZER ZNR VARISTOR 4 TERMINAL BLOCK lt INDOOR OUTDOOR LED1 LED RUN INDICATOR 2 CONNECTOR LOSSNAY CONNECTING LINE LED2 LED HOT ADJUST gt CN32 CONNECTOR REMOTE SWITCH TB5 TB6 TERMINAL BLOCK lt REMOTE CONTROLLER SW1 SWITCH lt HEATING ON OFF gt CN41 CONNECTOR HA TERMINAL A gt TRANSMISSION LINE gt SW SWITCH COOLING ON OFF gt CN51 CONTROL TH1 ROOM TEMP THERMISTOR Swt SWITCH MODEL SELECTION See Table 1 lt 32 15 0 77 F 5 2kQ DETECT gt sw2 SWITCH CAPACITY CODE gt xSee Table 2 TH2 PIPE TEMP THERMISTOR LIQUID SWE SWITCH lt EMERGENCY OPERATION gt lt 32 15 0 77 F 5 2kQ DETECT gt X4 RELAY lt FAN MOTOR gt TH5 COND EVA TEMP THERMISTOR BCR FAN CONTROL ELEMENT lt 32 15 0 77 F 5 2kQ DETECT gt LED1 POWER SUPPLY I B R B WIRED REMOTE CONTROLLER BOARD LED2 POWER SUPPLY lt R B gt LED3 TRANSMISSION lt INDOOR OUTDOOR gt P B CNDK CN2S RED WHT 1 1 2 DC13 1V 42 3 ET TB4
47. Photo 4 5 REMOVING THE VANE MOTOR 1 Disconnect the connector CN6V on the indoor controller board 2 Remove the 2 screws of the vane motor disconnect the lead wire and remove the vane motor from the shaft Photo 5 m m Nozzle 7 assembly Vane motor 6 REMOVING THE THERMISTOR 1 Removing the room temperature thermistor TH1 Disconnect the connector CN20 red on the indoor controller board Remove the room temperature thermistor from the holder 2 Removing the pipe temperature thermistor TH2 Disconnect the connector CN21 lt white gt on the controller board GRemove the pipe temperature thermistor set to the pipe 3 Removing the indoor coil temperature thermistor TH5 Disconnect the connector CN29 lt black gt on the indoor con troller board Remove the gas pipe thermistor set to the pipe Photo 6 Pipe PA Ml Condenser temperature e SES evaporator thermistor ii SES temperature TH2 pae thermistor Room temperature thermistor t Electrical TH1 parts box 7 REMOVING THE NOZZLE ASSEMBLY 1 Disconnect the connector CN6V on the controller board 2 Disconnect the lead wire of the vane motor 3 Remove the corner cover 4 Pull the drain hose out from the nozzle assembly 5 Unhook the hook of the lower nozzle assembly and pull the nozzle assembly toward you then remove the nozzle assembly by sliding it down Photo 7 Drain hose Nozzle ass
48. Remarks Wiring Recom z o RoHS OC369E 50 RoHS PARTS LIST STRUCTURAL PARTS PKA A24FA PKA A30FA PKA A24FAL PKA AS3OFAL PKA A24FA PKA A24FAL2 PKA A30FAL2 gt 12 Q ty set m Remarks Wiring Recom Part No Part Name Specifications PKA A24 30 Drawing No Diagram mended FA FA2 FAL FAL2 14G LEFT SIDE PANEL 1 1 E02 UNDER PLATE 1 E00 NOSE 1 A17 AIR FILTER 4 2 1 RoHS 17G INTAKE GRILLE E18 RECEIVER 14G RIGHT SIDE PANEL E18 RIGHT SIDE PANEL E14 WIRED REMOTE CONTROLLER E00 WIRELESS REMOTE CONTROLLER HOLDER E03 WIRELESS REMOTE CONTROLLER DOOR E08 WIRELESS REMOTE CONTROLLER E03 BACK PLATE E19 TOP PLATE E02 DRAIN SOCKET OC369E 51 RoHS PARTS LIST STRUCTURAL PARTS PKA A36FA Part No PKA A36FAL Part Name PKA A36FAz Specification PKA A36FAL2 Q ty set PKA A36 FAL FAL2 Remarks Drawing No Wiring Diagram Symbol Recom mended Q ty 14G LEFT SIDE PANEL 1 1 E03 UNDER PLATE E01 NOSE A17 AIR FILTER 17G INTAKE GRILLE E18 RECEIVER 14G RIGHT SIDE PANEL E1
49. URE THERMISTOR R01 H05 202 PIPE TEMPERATURE THERMISTOR T7W E10 130 MOTOR SUPPORT 18 G G R01 E06 239 OC369E FUSE 6 3A 250V 45 RoHS PARTS LIST ELECTRICAL PARTS PKA A24FA PKA A30FA PKA A24FAL PKA A30FAL PKA A24FAz2 PKA A24FAL PKA A30FAL2 Q ty set PKA A Remarks Wiring Recom 24130 24 Drawing No nbl FAL FA R01 761 102 BEARING MOUNT 111 R01 E23 114 LEFT LINEFLOW 111 T7W H25 480 HEAT EXCHANGER 1 T7W 26 480 HEAT EXCHANGER T7W E24 529 DRAIN PAN R01 621 CENTER COVER 01 063 JOINT SHAFT R01 002 AUTO VANE R01 527 DRAIN HOSE R01 223 VANE MOTOR R01 WIRELESS ADAPTER CONTROLLER BOARD 255 CAPACITOR 2 5uF 440V INDOOR CONTROLLER BOARD INDOOR CONTROLLER BOARD Part No Part Name Specification RoHS ee 0 h h Continued to the next page OC369E 46 RoHS PARTS LIST From the previous page Q ty set z Wiring Remarks Diagram 24 30 24 30 Drawing symbol FAL FA INDOOR POWER BOARD 11111 P B TERMINAL BLOCK 2P 1 2 1 TB5 TERMINAL BLOCK 3P S1 S2 S3 1 TERMINAL BLOCK 3P L1 L2 GR TB2
50. check the installation environment refrigerant amount weather when the trouble occurred and wiring related GReset error code logs and restart the unit after finishing service GThere is no abnormality in electrical components controller boards and remote controller The trouble is not reoccurring the abnormal symptom the cause of the trouble and take a corrective action according to TROUBLESHOOTING OF PROBLEMS 10 4 Not logged to operate unit for the time being if the cause is not ascertained There is no abnormality in electrical components controller boards remote controller etc OC369E 20 10 2 MALFUNCTION DIAGNOSIS METHOD BY REMOTE CONTROLLER In case of trouble during operation gt When a malfunction occurs to the air conditioner both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop lt Malfunction diagnosis method at maintenance service Procedure 1 Press the CHECK button twice CHECK lights and refrigerant Refrigerant address 00 blinks A MITSUBISHI ELECTRIC address display Check that the remote controller s CHECK 5 X CHECK es display has stopped before continuing display 2 Press the temperature Select the refrigerant address of the Temperature buttons indoor unit for the self diagnosis utton s ON OFF 4 TEMP Note Set refrigerant add
51. ct A control service tool PAC SK52ST For EA EC item refer to outdoor unit service manual Check disconnection or looseness of indoor outdoor unit connecting wire of indoor unit or outdoor unit Check all the units in case of twin indoor unit system Turn the power off and on again to check If abnormality generates again replace indoor controller board or outdoor controller circuit board Other indoor controller board may have defect in case of twin indoor unit system Indoor outdoor unit communication error Transmitting error Abnormal if 1 receiving is detected 30 times continuously though indoor controller board has transmitted 0 Defective transmitting receiving circuit of indoor controller board Noise has entered into power supply Noise has entered into outdoor control wire Turn the power off and on again to check If abnormality generates again replace indoor controller board Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board Defective indoor controller board Replace indoor controller board Remote controller control board Abnormal if data cannot be read nor mally from the nonvolatile memory of the remote controller control board Error code E1 Abnormal if the clock function of remote controller cannot be operated normally Error code E2 Defective remo
52. d is defective Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Heating mode Clogged filter reduced airflow Short cycle of air path Overload high temperature operation beyond the tolerance range Defective indoor fan motor Fan motor is defective Indoor controller board is defective Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Cooling or drying mode Check clogs of the filter Remove blockage Measure the resistance of fan motor s winding Measure the output voltage of fan s connector FAN on the indoor controller board The indoor controller board should be normal when voltage of AC 208 230V is detected while fan motor is connected Refer to 10 7 Check outdoor fan motor Check operating condition of refrigerant circuit Heating mode Q Check clogs of the filter Remove blockage Measure the resistance of fan motor s winding Measure the output voltage of fan s connector FAN on the indoor controller board The indoor controller board should be normal when voltage of AC 208 230V is detected while fan motor is connected Refer to 10 7 Check outdoor fan motor Check operating condition of refrigerant circuit Pipe temperature lt Cooling mode gt Detected as abnormal wh
53. does not light up On the wireless remote controller with condition above following phenomena take place No signals from the remote controller can be received Operation lamp is blinking The buzzer makes a short ping sound Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller refer to the following table LED1 power for microprocessor Indicates whether control power is supplied Make sure that this LED is always lit Indicates whether power is supplied to the remote controller This LED lights only in the case of the indoor unit which is connected to the outdoor unit refrigerant address 0 LED3 communication between indoor and Indicates state of communication between the indoor and outdoor units outdoor units Make sure that this LED is always blinking LED2 power for remote controller OC369E 23 Note Refer to the manual of outdoor unit for the details of display Such as F U and other E 10 3 SELF DIAGNOSIS ACTION TABLE Error Code Cause Countermeasure Abnormal point and detection method Room temperature thermistor TH1 The unit is 3 minute resume prevention mode if short open of thermistor is detected Abnormal if the unit does not reset normally after 3 minutes The unit returns to normal operation if
54. e controller Once the controllers are set the same operation mode can be repeated by simply pressing the ON OFF button Temperature setting buttons ON OFF button Cv Down Fan Speed button GE vp Fan Speed bar EA MITSUBISHI ELECTRIC Timer Menu button Monitor Set button Filter button 6 Mode button Return button lt Enter gt button Cv m Check button Clear button Lu e ee Back CM amp Om se NS Ahead 2 C C 2 BACK 5 DAY raa 38 TEST CA 2 4 Q Airflow Up Down button Timer On Off button PAR 21MAA CLOCK VOPERATIONA Set Day button Louver button Operation button To return operation number Opening the cover Ventilation button J AUN Operation button Built in temperature sensor To go to next operation number OC369E 6 e Wired remote controller Display Section For purposes of this explanation Day of Week Sensor
55. ecting the connectors connect the connector correctly referring to instal lation manual of an optional kit When there is no problem in the meth od of connecting the connectors check below Check voltage output from CNDK on indoor controller board When AC208 230V is not detected check the fuse on indoor controller board check the wiring connection between indoor power supply terminal block and CND on indoor controller board When AC208 230V is detected check below Check voltage output from CN2S on indoor power board When no voltage output check the wiring connection between CNDK on indoor controller board and CNSK on indoor power board If no problem are found indoor power board is defective When DC12 5 13 7V is detected check the wiring connection between CN2S on indoor power board and CN2D on indoor power board If no problem are found indoor control ler board is defective Note Refer the manual of the outdoor unit for the detail of remote controller Phenomena Cause Countermeasure 1 LED2 on indoor controller board is off When LED1 on indoor controller board is lit Mis setting of refrigerant address for outdoor unit There is no unit corresponding to refrigerant address 40 Check again the setting of refrigerant address for outdoor unit Set the refrigerant address to 0 For grouping control system under which 2 or more
56. embly Corner cover 8 REMOVING THE ELECTRICAL PARTS BOX 1 Remove the terminal block cover 2 Disconnect the connector yellow of the wireless remote controller board 3 Remove the front panel See Photo 1 4 Disconnect the vane motor connector 5 Disconnect the fan motor connector from the fan motor 6 Disconnect the connector yellow of the heater only PKH 7 Remove the liquid TH2 gas TH5 pipe thermistors See Photo 6 8 Remove the electrical parts box 2 screws OC369E 39 Photo 8 Pipe temperature thermistor Electrical parts box Fan motor connector OPERATION PROCEDURE PHOTOS amp ILLUSTRATION 9 REMOVING THE FAN MOTOR Photo 9 1 Remove the terminal block cover a Motor cover 2 Disconnect the connector lt yellow gt of the wireless remote lt controller board 3 Remove the front panel See Photo 1 4 Remove the electrical parts box See Photo 8 5 Remove the nozzle assembly See Photo 7 6 7 Remove the fan motor leg 3 screws Unscrew the set screws by using hexagonal wrench and Screw remove it by sliding the fan motor to right TUM 8 Remove the 4 screws and remove the motor cover from the Photo 10 fan motor leg Fan motor Screws Motor cover j Fan motor 77 k otor ieg ee 10 REMOVING THE LINE FLOW FAN Photo 11 1 Remove the terminal block cover 2 Remove the front panel See Photo 1
57. en the pipe temperature is not in the cooling range 3 minutes after compressor start and 6 minutes after the liquid or condenser evaporator pipe is out of cooling range Note 1 It takes at least 9 minutes to detect Note 2 Abnormality P8 is not detected in drying mode Cooling range 3 deg C 5 4deg F z TH TH1 TH Lower temperature between liquid pipe temperature TH2 and condenser evaporator temperature TH5 TH1 Intake temperature Heating mode When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heating range within 20 minutes Note 3 It takes at least 27 minutes to detect abnormality Note 4 It excludes the period of defrosting Detection restarts when defrosting mode is over Heating range 3 deg C 5 4deg F z TH5 TH1 OC369E Slight temperature difference between indoor room temperature and pipe liquid or condenser evaporator gt temperature thermistor Shortage of refrigerant Disconnected holder of pipe liquid or condenser evaporator thermistor Defective refrigerant circuit Converse connection of extension pipe on plural units connection Converse wiring of indoor outdoor unit connecting wire on plural units connection Defective detection of indoor room temperature and pipe lt condenser evaporator gt temperature th
58. ermistor Stop valve is not opened completely 25 Check pipe liquid condenser evaporator gt temperature with room temperature display on remote controller and outdoor controller circuit board Pipe lt liquid or condenser evaporator gt temperature display is indicated by setting SW2 of outdoor controller circuit board as follows controller circuit board after connecting Conduct temperature check with outdoor A Control Service Tool PAC SK52ST Check converse connection of extension pipe or converse wiring of indoor outdoor unit connecting wire Error Code Abnormal point and detection method Cause Countermeasure Pipe temperature thermistor Condenser Evaporator TH5 The unit is in 3 minute resume protec tion mode if short open of thermistor is detected Abnormal if the unit does not get back to normal within 3 minutes The unit returns to normal operation if it has been reset normally Constantly detected during cooling drying and heating operation except defrosting Short 90 C 194 F or more Open 40 C 40 F or less Defective thermistor characteristics Contact failure of connector CN29 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Temperature of thermistor is 90 C 194 F or more or 40 C 40 F or less caused by defective refrigerant circuit Defective indoor c
59. holes 1 592037 1 15 32 37 for tapping screws 7 2299374 273298 1 1 4 32 029 KT PX ZN MU Nd 2 m 32 015 32 012 holes m for bolts 227132225 9 716 40 173 BS 13208 12384 5 12 01 4 06 ssa 819 85 Rear piping for tapping screws N Range for left rear piping hole INDOOR UNIT PKA A36FA PKA A36FAL PKA A36FA 6 PKA A36FAL2 Top side 9 m 9 14235 9 1 4 235 9 1 4 235 9 1 4 235 1 25 32 45 1259245 71 25 9245 1259206 Front view Left side 18 3 8 340 Knockout hole for left piping 31 82 28 Drain hose for left hand side piping 66 1 8 1680 53 15 16 1370 Air intake 43 11 16 1110 Drain hose Drain hose Wiring entrance holes PKA A36FAL Knockout hole Right side for right piping 9 1 4 235 7 314 197 Terminal block 1 516 34 7 16 36 12113249 2 9 32 58 15 1624 25132155 4 23 32 120 7 7182 183 Lower side 55 1 8 1400 9 7 16 240 27 5 16 694 Air outlet 27 5 16 694 Air outlet Y N e o o Louvers Manual B Under panel Removable at Auto vanes left hand side piping Knockout hole for under piping Refrigerant pipe Drain pipe Service space required around indoor unit 1 31 32 50
60. in water waving due to filter clogging amp Extension piping connection difference at twin system C Miswiring of indoor outdoor connecting at twin system Room temperature thermistor liquid pipe temperature thermis tor detection is defective 27 Check the drain pump Check whether water be drained Check the resistance of the drain sensor Check the connector contact failure Check the drain sensor leadwire mounted Check the filter clogging Check the piping connection Check the indoor outdoor connecting wires Check the room temperature display of remote controller Check the indoor liquid pipe temperature display of outdoor controller board 10 4 TROUBLESHOOTING OF PROBLEMS Phenomena Note Refer to the manual of outdoor unit for the detail of remote controller Cause Countermeasure 1 LED2 on indoor controller board is off OC369E When LED1 on indoor controller board is also off Power supply of rated voltage is not supplied to out door unit Defective outdoor controller circuit board Power supply of 208 230V is not supplied to indoor unit Defective indoor power board Defective indoor controller board For the separate indoor outdoor unit power sup ply system Power supply of 208 230V AC is not supplied to indoor unit The connectors of the optional replacement kit are not used Defective i
61. indoor unit The address changes to a separate setting Diagnose remote controller a When RC is displayed remote con trollers have no problem Turn the power off and on again to check When becoming abnormal again replace indoor controller board b When RC is displayed replace remote controller c When RC E3 or ERC 00 66 is displayed noise may be causing abnormality Error Code Abnormal point and detection method Cause Countermeasure Indoor outdoor unit communication error Signal receiving error Abnormal if indoor controller board cannot receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board cannot receive any signal normally for 3 minutes Consider the unit as abnormal under the following condition When 2 or more indoor units are connected to 1 outdoor unit indoor controller board cannot receive a signal for 3 minutes from outdoor controller circuit board a signal which allows outdoor controller circuit board to transmit signals Contact failure short circuit or miswiring converse wiring of indoor outdoor unit connecting wire Defective transmitting receiving circuit of indoor controller board G Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor outdoor unit connecting wire Check LED display on the outdoor control circuit board Conne
62. ion are necessary 3 Check items and notices as the emergency operation 1 Emergency operation cannot be used as follows When the outdoor unit is something wrong When the indoor fan is something wrong When drain over flow protection operation is detected during self diagnosis Error code P5 2 Emergency operation will be serial operation by the power supply ON OFF ON OFF or temperature etc adjustment is not operated by the remote controller 3 Do not operate for a long time as cold air is blown when the outdoor unit starts defrosting operation during heat emer gency operation 4 Cool emergency operation must be within 10 hours Otherwise heat exchanger of indoor unit may get frosted 5 After completing the emergency operation return the switch setting etc in former state 6 Since vane does not work at emergency operation position the vane slowly by hand OC369E 30 10 6 HOW CHECK THE PARTS PKA A12 18GA 24 30 36FA PKA A12 18GAL PKA A24 30 36FAL PKA A12 18GA PKA A24 30 36FA PKA A12 18GAL PKA A24 30 6 PKA A12 18GAz PKA A24 30 36FAz2 12 18 1 PKA A24 30 36FAL2 Parts name Check points Room temperature Disconnect the connector then measure the resistance with a tester thermistor TH1 At the ambient temperature 10 C 50 F 30 C 86 F Pipe temperature thermistor TH2 Condenser evaporator Normal Abnormal Refer to Thermistor Charac
63. isplay area 8 ae ON OFF D 7433038 OMENU hall me CHEK Tes GD GD 5 21 554 3 1 Stop running the air conditioner 2 Press the TEST button for seconds so that Maintenance mode appears on the screen at After a while 00 appears in the refrigerant address number display area at 3 Press the CHECK button for 3 seconds to switch to Maintenance monitor Note It is not possible to switch to Maintenance monitor during data request in maintenance mode 1 while is blinking since no buttons are operative appears on the screen at when Maintenance monitor is activated The display at amp now allows you to set a request code No 4 Press the TEMP V _ and buttons to select the desired refrigerant address 5 Press the CLOCK V A buttons to set the desired request code No 311 318 321 324 331 335 6 Press the FILTER button to perform function setting If the above operations are set correctly request code number will appear in data display area at Example When the request code number is 311 311 appears on the screen at Refererence You can check the request code number of current setting by setting the request code number 310 320 or
64. n unit Fig 1 Refrigerant address Refrigerant address 00 01 Start operation Main Sub Sub unit G Rotation function amp Back up function Request code number 313 318 Error occurred on main unit Start operation Main Sub Sub Main Sub OC Outdoor unit Main IC Indoor unit a Abnormalcondition RC Wired remote controller Run H EI 1 1 Sub Y unit IC 2 1 1 c ped 1 28 days 1 1 28 days 1 Ex When the request code number is 313 each unit operates alternately in daily cycle 2 2nd stage cut in function Outline of functions Quantity of operating units is controlled according to the room temperature and set point When room temperature becomes more than set point standby unit starts 2 units running When room temperature falls below set point 4 C 7 5 F standby unit stops 1 unit running System constraint This function is available only in rotation operation or back up and cooling mode 2nd stage cut in function Request code number 322 324 Room temp Set point Room temp lt Set point 4 C 7 5 F i Start operation Sub unit start operation Sub unit stop i IC 1 Sub unit IC 2 OC369E 35 2 11 1 2 How to perform the operation of rotation function Back up function 2nd stage cut in function Set by wired remote controller Maintenance monitor
65. ndoor controller board Defective indoor power board 28 Check the voltage of outdoor power supply terminal block L1 L2 When AC 208 230V is not detected check the power wiring to outdoor unit and the breaker When AC 208 230V is detected check below Check the voltage between outdoor ter minal block S1 and S2 When AC 208 230V is not detected check the fuse on outdoor controller circuit board check the wiring connection When AC 208 230V is detected check below Check the voltage between indoor terminal block S1 and S2 When AC 208 230V is not detected check indoor outdoor unit connecting wire for miswiring When AC 208 230V is detected check below Check voltage output from CN2S on indoor power board DC13 1V Refer to 10 7 1 When no voltage is output check the wiring connection When output voltage is between DC12 5V and DC13 7V check below Check the wiring connection between indoor controller board and indoor power board Check the fuse on indoor controller board If no problems are found indoor controller board is defective Check the voltage of indoor power supply terminal block L1 L2 When AC208 230V 15 not detected check the power supply wiring When AC208 230V is detected check below Check that there is no problem in the method of connecting the connectors When there are problems in the method of conn
66. nockout hole for under piping Refrigerant pipe Drain pipe Service space required around indoor unit intake Air outlet 1 3 16 30 more 4 23 32 120 9 1 4 235 Terminal block 2 e 15 16 24 1 2 5 32 55 7 1132 183 Knockout hole for right piping Less than 19 32 15 Bolt Drain hose 4 7 32 107 4 3 8 111 Unit inch mm MODEL 24 30 Liquid pipe 3 8 inch Gas pipe 5 8 inch Sleeve 1 Through hole 03 17 32 3 17 32 03 15 16 290 290 0100 1 Sleeves are available on the market 1 31 32 50 or more 9 27 32 250 or more Less than 9 27 32 250 wo N Drainage range on 8 Details of installation plate rahthand side 31 32 21 32 245 Knockout hole for wiring _ Drainage range on 3831 32990 aes sS Sanse _ ___13 82 3 19 32 35 13 16 10 91 910 t1 7 82 285 _ B L 35 7 16 900 3 4019 58 gS 1 28 92 18 _ 1 8 16 30 Se Wall tue MINES 319829 a Sess E le 85 0500 F 1 9 16 39 66 01 4 06
67. on INDOOR UNIT Service Ref SPECIFICATIONS PKA A12GA q PKA A12GAL 1 2 Power supply phase cycle voltage Max Fuse Size Single phase 60Hz 208 230V 15 Min Circuit Ampacity 1 External finish Munsell 0 70Y 8 59 0 97 Heat exchanger Plate fin coil Fan Fan drive x No Line flow direct x 1 Fan motor output kW 0 030 Fan motor F L A 0 33 Airflow Low Medium2 Medium1 High 9 10 11 12 320 350 390 425 Wet 8 9 10 11 290 315 350 380 External static pressure Pa mmAq O direct blow Operation control amp Thermostat GA Wired remote controller amp built in GAL Wireless remote controller amp built in Noise level Low Medium2 Medium1 High dB 36 38 41 43 Field drain pipe mm in 20 13 16 Dimensions mm in 990 39 mm in 235 9 1 4 340 13 3 8 Weight Service Ref kg Ibs 16 35 8 PKA A18GAL 1 2 Power supply phase cycle voltage Single phase 60Hz 208 230V Max Fuse Size 15 Min Circuit Ampacity 1 External finish Munsell 0 70Y 8 59 0 97 Heat exchanger Plate fin coil Fan Fan drive x No Line flow direct x 1 Fan motor output kW 0 030 Fan motor F L A 0 33 Airflow Low Medium2 Medium
68. on fail ure of remote controller terminal block etc has returned to normal 3 Upward downward vane perform ance failure The vane is not downward during defrosting and heat preparation and when the thermostat is OFF in HEAT mode Working of COOL protection function Vane motor does not rotate Defective vane motor Breaking of wire or connection failure of connector Up downward vane setting is No vanes Upward downward vane does not work The vane is set to fixed position Normal operation The vane is set to horizontal regardless of remote control Check left Check the vane motor Refer to How to check the parts Check for breaking of wire or connec tion failure of connector Check Up down vane setting Unit function selection by remote controller Normal operation Each connector on vane motor side is disconnected 4 Receiver for wireless remote controller Weak batteries of wireless remote controller Contact failure of connector CNB on wireless remote controller board Insert failure Contact failure of connector CN90 on indoor con troller board Insert failure Contact failure of connector between wireless remote controller board and indoor controller board OC369E 29 Replace batteries of the wireless remote controller Check contact failure of each connector If no problems are found in connector replace indoor cont
69. ontroller board Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN29 on the indoor controller board Refer to 10 7 Turn the power on and check restart after inserting connector again Operate in test run mode and check pipe condenser evaporator temperature with outdoor controller circuit board If pipe con denser evaporator temperature is extreme ly low in cooling mode or high in heating mode refrigerant circuit may have defect Operate in test run mode and check pipe condenser evaporator temperature with outdoor control circuit board If there is exclusive difference with actual pipe condenser evaporator temperature replace indoor controller board There is no abnormality if none of above comes within the unit Turn the power off and on again to operate In case of checking pipe temperature with outdoor controller circuit board be sure to connect A control service tool PAC SK52ST Remote controller transmission error EO signal receiving error E4 Abnormal if main or sub remote control ler cannot receive any transmission normally from indoor unit of refrigerant address 0 for 3 minutes Error code EO Abnormal if sub remote controller could not receive for any signal for 2 minutes Error code EO Abnormal if indoor controller board can not receive any data from remote controller board
70. or characteristics Contact failure of connector CN21 on the indoor controller board Insert failure Breaking of wire or contact failure of thermistor wiring Defective refrigerant circuit is causing thermistor temperature of 90 C 194 F or more or 40 C 40 F or less Defective indoor controller board 2 9 Check resistance value of thermistor For characteristics refer to P1 above Check contact failure of connector CN21 on the indoor controller board Refer to 10 7 Turn the power on and check restart after inserting connector again Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defect Check pipe liquid temperature with remote controller in test run mode If there is extreme difference with actual pipe liquid temperature replace indoor controller board Turn the power off and on again to operate after check Drain sensor DS Suspensive abnormality if short open of thermistor is detected for 30 seconds continuously Turn off compressor and indoor fan Short open is detected for 30 seconds continuously during suspensive abnormality The unit returns to normal operation if it has been reset normally Detect the following condition During cooling and drying operation case that pipe liquid temperature
71. outdoor units are connected set one of the units to 70 Set refrigerant address using SW1 3 6 on outdoor controller circuit board 2 LED2 on indoor controller board is blinking When LED1 on indoor controller board is also blinking Connection failure of indoor outdoor unit connecting wire Check indoor outdoor unit connecting wire for connection failure e When LED is lit Miswiring of remote controller wires Under indoor unit system 2 indoor units are wired together Refrigerant address for outdoor unit is wrong or not set Under grouping control system there are some units whose refrigerant address is 0 Shortcut of remote controller wires Defective remote controller Check the connection of remote con troller wires in case of twin indoor unit system When 2 or more indoor units are wired in one refrigerant system connect remote controller wires to one of those units Check the setting of refrigerant address in case of grouping control system If there are some units whose refrigerant addresses are 0 in one group set one of the units to 0 using SW1 3 6 on outdoor controller circuit board Remove remote controller wires and check LED2 on indoor controller board When LED2 is blinking check the short cut of remote controller wires When LED2 is lit connect remote con troller wires again and if LED2 is blinking remote controller is defective if LED2 is lit connecti
72. ress using the outdoor unit s DIP switch SW1 veer For more information see the outdoor unit installation manual FAN nurosrop 116 0 MODE AUTOSTAR 3 Point the remote controller at the If an air conditioner error occurs the K 6 1 sensor the indoor unit and indoor unit s sensor emits an intermit CHECKS LOUVER press the HOUR button tent buzzer sound the operation lamp CHECK mm blinks and the error code is button output It takes 3 seconds at most for error code to appear SET RESET CLOCK sensor on the indoor unit and 2 4 Point the remote controller at the The check mode is cancelled press the ON OFF button To be continued to the next page OC369E 21 2 Refer to the following tables for details on the check codes Output pattern A Beepersounds Beep Beep Beep Beep pen m OPERATION 1st 2nd Tc Repeated INDICATOR lamp blinking OR On On On on On pattern Self check Approx 2 5 sec 0 5 sec 0 5 sec 0 5 sec 0 5 sec Approx 2 5 0 5 0 5 sec starts V J Start signal TON wm received Number of blinks beeps in pattern indicates the check Number of blinks beeps in pattern indicates code in the following table i
73. roller board When the same trouble occurs even if indoor controller board is replaced replace wireless remote controller board 10 5 EMERGENCY OPERATION 10 5 1 When wireless remote controller has troubles or its battery is exhausted 1 Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor unit 2 To start operation Cooling Operation Press Cooling switch Heating Press Heating switch When the unit starts operating the operation lamp is lit Emergency operation switch cooling Emergency operation switch heating Receiver Operation lamp Emergency operation will be performed as follows Mode Cooling Heating Set temperature 24 C 75 F 24 C 75 F Fan speed High High Airflow direction Horizontal 30deg Downward 70deg 3 To stop operation Press either emergency operation switch cooling heating 10 5 2 When wired remote controller or indoor unit microprocessor fails 1 If other defects are not found when trouble occurs emergency operation starts as the indoor controller board switch SWE is set to ON During the emergency operation the indoor unit is as follows Indoor fan high speed operation 2 For emergency operation of cooling or heating When emergency operation for COOL or HEAT setting of the switch SWE in the indoor controller board and outdoor unit emergency operat
74. s on the right hand side of the indoor controller board pull the left hand side toward you and lift up the cover to the right Then the indoor controller board can be removed REMOVING THE ELECTRICAL PARTS BOX Photo 2 1 Remove the right side panel 2 Remove the screw of the electrical parts box cover and remove the cover 3 Remove the room temperature thermistor and the condens er evaporator temperature thermistor 4 Disconnect the vane motor connector on the indoor control ler board 5 Remove the 2 screws of the electrical parts box 6 Disconnect the connector of the heater lead wire connector 7 Disconnect the connector of the fan motor lead wire 8 Remove the electrical parts box Condenser evaporator Room temperature temperature thermistor thermistor Screws auis iu Electrical parts box OC369E 41 OPERATING PROCEDURE PHOTOS amp ILLUSTRATION 9 Remove the screws of the indoor controller board case Photo 3 and pull out the indoor controller board case Then the indoor power board the fan motor capacitor and the heater relay can be serviced Capacitor power board amp Indoor controller board case Electrical parts box 5 Removing the vane motor Photo 4 Screws 1 Remove the right side panel 2 Remove the screw of the electrical parts box cover and remove the cover 3 Remove the 2 screws of the vane motor and remove the motor from the shaft 4
75. s that the timer is off tion of the outcoming airflow The display blinks if the temperature is less than 46 F or 102 F or more One Hour Only indicator Displayed if the airflow is set to Louver display 5 low or downward during COOL Indicates the action of the swing louver Temperature Setting or DRY mode Operation varies Does not appear if the louver is not Shows the target temperature according to model running The indicator goes off in 1 hour when the airflow direction Power On indicator also changes Indicates that the power is on OC369E 7 22 e Wireless remote controller CHECK ESTAUN display Indicate that the unit is being checked or test run MODEL SELECT display display Blinks when model is selected OPERATION MODE display OPERATION MODE display Indicates which operation mode is in effect 1 display The vertical direction of airflow is indicated display Displays selected fan speed ON OFF button The unit is turned ON and OFF alternately each time the button is pressed FAN SPEED SELECT button Changes the fan speed MODE SELECT button Switches the operation mode between COOLING DRY FAN HEATING and AUTO mode CHECK TEST RUN buttons Performs an inspection check or test
76. sly beep beep beep 0 4 0 4 0 4 sec after the initial 2 beeps to confirm the self check start signal was received the specified refrigerant address is incorrect OC369E 22 422 On wireless remote controller The continuous buzzer sounds from receiving section of indoor unit Blink of operation lamp On wired remote controller Check code displayed in the LCD If the unit cannot be operated properly after the test run has been performed refer to the following table to find out the cause Wired remote controller LED 1 2 PCB in outdoor unit For about 2 After LED 1 2 are lighted LED 2 is about 2 minutes after power on operation PLEASE WAIT minutes after turned off then only LED 1 is of the remote controller is not possible power on lighted Correct operation due to system start up Correct operation Connector for the outdoor unit s protection nly LED 1 is lighted device is not connected PLEASE WATT Error code Subsequent to LED 1 2 blink Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 GR about 2 minutes Display messages do not after power on Only LED 1 is lighted Incorrect wiring between indoor and outdoor appear even when operation LED 1 blinks twice Units incorrect polarity 51 52 53 Switch is turned ON operation LED 2 blinks once Remote controller wire short lamp
77. st before brazing Leave elbow joints etc in their packaging Tools for R410A Flare tool Size adjustment gauge Vacuum pump adaptor Electronic refrigerant charging scale Gauge manifold Charge hose Gas leak detector Torque wrench If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of compressor Handle tools with care connections must be ester oil ether oil or alkylbenzene oil in a small amount The refrigerant oil applied to flares and flange If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Do not use a charging cylinder Charge refrigerant from liquid phase of gas cylinder If a charging cylinder is used the composition of refrigera nt will change and the efficiency will be lowered If the refrigerant is charged from gas phase composition change may occur in refrigerant and the efficiency will be lowered Use the specified refrigerant only Do not use refrigerant other than R410A If other refrigerant R22 etc is used chlorine in refrige rant can cause deterioration of refrigerant oil etc 1 Cautions for service Never use any refrigerant other than that
78. te controller Replace remote controller Forced compressor stop due to water leakage abnormality When the intake temperature subtracted with liquid pipe temperature is less than 10 C 14 F drain sensor detects wheth er it is soaked in the water not at the interval of 90 seconds Drain pump will start operating when the drain sensor detects to be soaked in the water The unit has a water leakage abnormality when the following conditions a and b are satisfied while the above mentioned detection is performed a The drain sensor detects to be soaked in the water 10 times in a row b The intake temperature subtracted with liquid pipe temperature is detect ed to be less than 10 C 14 F fora total of 30 minutes When the drain sensor detects to be NOT soaked in the water the detection record of a and b will be cleared The drain sensor detection is performed in operations other than cooling When the unit stops operating during heating or fan operation when the unit stops because of some abnormality Once the water leakage abnormality is detected abnormality state will not be released until the main power is reset OC369E Drain pump trouble Drain defective Drain pump clogging Drain pipe clogging Open circuit of drain sensor side heater Contact failure of drain sensor connector Dew condensation on drain sensor Drain water trikles along lead wire Dra
79. teristic graph temperature thermistor 4 3kQ 9 6kQ Open or short TH5 Fan motor MF Measure the resistance between the terminals with a tester Relay E Winding temperature 20 C 68 Motor terminal Normal Abnormal or Relay connector 12 18GA 1 2 PKA A24 30FA 1 2 PKA A36FA 1 2 PKA A12 18GAL 1 0 PKA A24 30FAL 1 2 PKA A36FAL 2 Protector Red Black 141 20 107 4Q 69 70 1 25 5 41 F White Black 131 50 97 70 95 50 ON 79 15 59 F A12 18GA L only OFF 130 5 C 41 F ON 80 20 C 68 F A24 30 36FA L only Vane motor MV Measure the resistance between the terminals with a tester Orange At the ambient temperature 20 C 68 F 30 C 86 Open or short Red Connector Normal Abnormal Pink Brown Yellow Brown Blue at Brown Blue Red Orange 186 2140 Open or short Thermistor characteristic graph Thermistor for Room temperature thermistor TH1 lower temperature Pipe temperature thermistor TH2 Condenser evaporator temperature thermistor TH5 gt Thermistor Ro 15kQ 3 Fixed number of 3480 2 t C Rt 15exp 3480 273 273 Resistance F Rt 15exp 3480 273 132
80. troller board Riis CNB R129 CN6V ip Vane motor output i MV CNP 5 Drain pump output CN41 DP Connector HA terminal A 208 230V AC A 2 51 E Centrally control 5 Control signal 13VDC pulse input P Operation indicator n 13VDC 5 Malfunction indicator 13VDC CN24 Only GA L z 1 2 Connector Back up heating SWE CN32 Emergency operation Remote switch CN2L Connector LOSSNAY Jumper wire J41 J42 Pair number setting with wireless remote controller sw2 Capacity setting Swi Model setting FAN Fan motor output OC369E 32 10 7 2 Indoo PKA A12GA PKA A18GA PKA A24FA 6 7 OC369E r power board PKA A12GAL 126 PKA A12GAL PKA A12GA PKA A12GAL2 PKA A18GAL PKA A18GA PKA A18GAL PKA A18GA PKA A18GAL2 PKA A24FAL 24 PKA A24FAL PKA A24FA2 PKA A24FAL2 PKA A30FAL PKA A30FAL gt PKA A30FAL2 PKA A36FAL PKA A36FA PKA A36FAL 6 gt PKA A36FAL2 CN2S Connect to the indoor controller board CN2D between D to 12 6 13 7V DC Pin 27 4 10996789498 amp 07178 CNSK Connect to the indoor controller board CNDK between to 208 230V AC 33 2 10 8 FUNCTIONS SWITCH AND JUMPER WIRE Each function is controlled by
81. wires are made with polarities make wiring matching terminal numbers S1 S2 S3 3 Symbols used in wiring diagram above are Connector Terminal block 4 This diagram shows the wiring of Indoor and Outdoor connecting wires specification of 230V adopting superimposed system of power and signal x1 Use copper supply wires Self diagnosis Please refer to technical manuals etc OC369E 16 PKA A24FA PKA A30FA PKA A36FA PKA A24FAL PKA A36FAL PKA A24FA PKA A30FA PKA A36FA PKA A24FAL PKA A30FAL LEGEND SYMBOL NAME SYMBOL NAME SYMBOL NAME PB INDOOR POWER BOARD C CAPACITOR FAN MOTOR gt W B WIRELESS REMOTE CONTROLLER BOARD INDOOR CONTROLLER BOARD MF FAN MOTOR RU RECEIVING UNIT FUSE FUSE 6 3A 250V MV VANE MOTOR BZ BUZZER ZNR VARISTOR TERMINAL BLOCK lt INDOOR OUTDOOR LED1 LED RUN INDICATOR CN2L CONNECTOR lt LOSSNAY gt CONNECTING LINE gt LED2 LED lt HOT ADJUST gt CN32 CONNECTOR lt REMOTE SWITCH gt TB5 TB6 TERMINAL BLOCK lt REMOTE CONTROLLER SW1 SWITCH HEATING ON OFF gt CN41 CONNECTOR lt HA TERMINAL A gt TRANSMISSION LINE gt SW2 SWITCH COOLING ON OFF gt CN51 CONNECTOR CENTRALLY CONTROL ROOM TEMP THERMISTOR Swi SWITCH MODEL SELECTION gt See Table 1 327 15 77 F 5 2kO DETECT gt sw2 SWITCH CAP

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