Mitsubishi Electric SUZ-KA09NA2.MX Service Manual Download Page 7 | Manualshive

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OCH699

SUZ-KA15NA2.MX

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Summary of Contents for SUZ-KA09NA2.MX

Page 1: ...SHOOTING 13 11 FUNCTION SETTING 29 12 DISASSEMBLY INSTRUCTIONS 32 HFC utilized R410A R410A Note This service manual describes service data of the outdoor units only PARTS CATALOG OCB699 No OCH699 December 2018 Outdoor unit Model Name SUZ KA09NA2 SUZ KA09NAH2 SUZ KA12NA2 SUZ KA12NAH2 SUZ KA15NA2 SUZ KA15NAH2 Service Ref SUZ KA09NA2 MX SUZ KA09NAH2 MX SUZ KA12NA2 MX SUZ KA12NAH2 MX SUZ KA15NA2 MX SU...

Page 2: ...o Service Ref Heat pump without electric heater KA15 NA H 2 MX HWE08020 KA12 NA H 2 MX KA09 NA H 2 MX SLZ KF09 12 15NA TH SEZ KD09 12 15NA4R1 TH PEAD A09 12 15AA7 MX SVZ KP12NA MX MLZ KP09 12NA U1 OCH699 HWE1608A OBH802 Air outlet Drain outlet Piping Drain hose Air inlet back and side SUZ KA09NA H 2 MX SUZ KA12NA H 2 MX SUZ KA15NA H 2 MX ...

Page 3: ...sions W in 31 1 2 D in 11 1 4 H in 21 5 8 Weight Ib 81 WHUQDO QLVK Munsell 3Y 7 8 1 1 Control voltage by built in transformer VDC 12 24 Refrigerant piping Not supplied Refrigerant pipe size Min wall thickness Liquid in 1 4 0 0315 Gas in 3 8 0 0315 1 2 0 0315 Connection method Indoor Flared Outdoor Flared Between the indoor outdoor units Height difference ft 40 Piping length ft 65 Refrigerant charg...

Page 4: ... the unit are clear holes KA09 12 15NA KA09 12 15NAH REQUIRED SPACE Liquid refrigerant pipe joint Refrigerant pipe flared Ø 1 4 Gas refrigerant pipe joint Refrigerant pipe flared Ø 3 8 KA09 12 Ø 1 2 KA15 4 in 100 mm or more 14 in 350 mm or more 8 in 200 mm or more 2 4 in 100 mm or more Unit inch mm SUZ KA09NA H 2 MX SUZ KA12NA H 2 MX SUZ KA15NA H 2 MX ...

Page 5: ...5 OCH699 SUZ KA09NA2 MX SUZ KA12NA2 MX 5 WIRING DIAGRAM ...

Page 6: ...6 OCH699 SUZ KA09NAH2 MX SUZ KA12NAH2 MX ...

Page 7: ...7 OCH699 SUZ KA15NA2 MX ...

Page 8: ...8 OCH699 SUZ KA15NAH2 MX ...

Page 9: ...09 12 with heat insulator ø1 2 ø12 7 KA15 Stop valve with service port Capillary tube O D 0 157 I D 0 094 9 7 16 ø4 0 ø2 4 240 KA12 15 Muffler SUZ KA09NA H 2 MX SUZ KA12NA H 2 MX SUZ KA15NA H 2 MX Max Length A Max Height difference B Indoor unit Outdoor unit MAX REFRIGERANT PIPING LENGTH and MAX HEIGHT DIFFERENCE Model Refrigerant piping ft Piping size O D in Max Length A Max Height difference B G...

Page 10: ...air temperature DB F 59 104 57 105 57 101 Outdoor unit Intake air temperature DB F 95 47 95 47 95 47 WB F 75 43 75 43 75 43 Representative matching SLZ KF09NA SLZ KF12NA SLZ KF15NA Item Unit Cooling Heating Cooling Heating Cooling Heating Total Capacity BTU h 9000 11000 12000 13000 14100 18000 SHF 0 87 0 74 0 75 Input kW 0 67 0 81 0 9 1 31 1 15 1 73 Electrical circuit Indoor unit SLZ KF09NA SLZ KF...

Page 11: ...mperature DB F 58 103 59 100 58 99 Outdoor unit Intake air temperature DB F 95 47 95 47 95 47 WB F 75 43 75 43 75 43 Representative matching SVZ KP12NA MLZ KP09NA MLZ KP12NA Item Unit Cooling Heating Cooling Heating Cooling Heating Total Capacity BTU h 12000 11000 9000 12000 12000 15400 SHF 0 89 0 82 0 74 Input kW 0 94 1 24 0 71 0 86 0 96 1 3 Electrical circuit Indoor unit SVZ KP12NA MLZ KP09NA ML...

Page 12: ...N OFF COOL 5 seconds HEAT 5 seconds 8 ACTUATOR CONTROL 8 3 RELATION BETWEEN MAIN SENSOR AND ACTUATOR Sensor Purpose Actuator Compressor LEV Outdoor fan motor R V coil Indoor fan motor Defrost heater Discharge temperature thermistor Protection ż ż Indoor coil temperature thermistor Cooling Coil frost prevention ż Heating High pressure protec tion ż ż Defrost thermistor Heating Defrosting ż ż ż ż ż ...

Page 13: ...UTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and turn off the breaker 2 Be sure to turn OFF the power supply before removing the fro...

Page 14: ...board temperature thermistor on the inverter P C board exceeds 72 to 85 C ƒ KHFN DURXQG RXWGRRU XQLW ƒ KHFN RXWGRRU XQLW DLU SDVVDJH ƒ5HIHU WR ICheck of outdoor fan motor 10 5 time blink 2 5 seconds OFF High pressure protection Indoor coil thermistor exceeds 70 C in HEAT mode Defrost thermistor exceeds 70 C in COOL mode ƒ KHFN UHIULJHUDQW FLUFXLW DQG UHIULJHUDQW DPRXQW ƒ KHFN VWRS YDOYH 11 8 time ...

Page 15: ...y Ref address Cancel OK Self check Return Ref address Error history deleted 2 With the F1 or F2 button enter the refrigerant address and press the button Select Self check with the F1 or F2 button and press the button 1 Select Service from the Main menu and press the button 3 Check code unit number attribute will appear will appear if no error history is available 4 Resetting the error history Pre...

Page 16: ...it s sensor emits an intermittent buzzer sound the operation light blinks and the check code is output It takes 3 seconds at most for check code to appear 4 Point the remote controller at the sensor on the indoor unit and press the ON OFF button The check mode is cancelled Malfunction diagnosis method at maintenance service 10 3 2 Self diagnosis Wireless remote controller In case of trouble during...

Page 17: ...anual 2 P2 Pipe TH2 sensor error P9 Pipe TH5 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Drain sensor error Float switch connector CN4F open 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 9 E4 E5 Remote controller signal receiving error 12...

Page 18: ... 5HIHU WR QYHUWHU 3 ERDUG LQ 7 67 32 17 5 0 1 VOLTAGE for the chart of thermistor Compressor Measure the resistance between terminals with a tester Temperature 14 104 F 10 40 C 1RUPDO KA09 KA12 KA15 U V U W V W 1 26 1 72 1 60 2 17 0 82 1 11 Outdoor fan motor Measure the resistance between lead wires with a tester Temperature 14 104 F 10 40 C Color of lead wire 1RUPDO KA09 12 15 RD BK BK WH WH RD 2...

Page 19: ...nd switch to the COOL or HEAT mode 3 Compressor starts at rated frequency in COOL mode or 58 Hz in HEAT mode 4 Indoor fan operates at High speed 5 To cancel test run operation press the ON OFF button on remote controller Measurement point at 3 points BK U WH V BK U RD W WH V RD W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During thi...

Page 20: ... Electrical circuit check 1 Contact of the compressor connector 2 Output voltage of inverter P C board and balance of them See 10 5 3 LUHFW FXUUHQW YROWDJH EHWZHHQ DQG RQ WKH LQYHUWHU 3 ERDUG 4 Voltage between outdoor terminal block S1 S2 1 Heat the compressor with a drier for about 20 minutes Do not recover refrigerant gas while heating Heating part ƔConnect the compressor and activate the invert...

Page 21: ...to 10 4 TROUBLE CRITERION OF MAIN PARTS In case CN721 is disconnected or R V coil is open voltage is generated between the terminal pins of the connector although no signal is being transmitted to R V coil Check if CN721 is connected Is there 208 230 VAC between CN721 and on the inverter P C board 3 minutes after the power supply is turned ON No Yes Replace the inverter P C board Replace the 4 way...

Page 22: ... manually and measure the voltage of CN931 HWZHHQ DQG HWZHHQ DQG HWZHHQ DQG Does the voltage between each terminal become 5 and 0 VDC repeatedly Does the outdoor fan motor rotate smoothly Replace the outdoor fan motor Replace the inverter P C board Yes Yes No Fixed to either 5 or 0 VDC No No Yes Check the connection between the connector CN931 and CN932 Disconnect the connectors CN931 and CN932 fr...

Page 23: ... P C board Refer to 10 6 TEST POINT DIAGRAM AND VOLTAGE No Check the electric parts in main circuit Yes Yes No Disconnect the connector between compressor and intelligent power module Turn ON power supply and press the TEST button twice on the indoor unit or remote controller Inverter P C board Solder side DB61 260 370 VDC K Check of LEV Expansion valve Turn on power supply to the outdoor unit aft...

Page 24: ...e connectors CN931 CN932 of the outdoor fan motor If the connection is poor make it correct Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in verter P C board Does the LED blink 10 times Replace the inverter P C board Check the corresponding parts following LED indication Refer to 10 3 HOW TO PR CEED SELF DIAGNOSIS Yes No Yes 10 time blink No ...

Page 25: ...n ON the power supply Does the LED on the inverter P C board or the outdoor electronic control P C board repeat 3 6 second OFF and 0 8 second ON quick blinking 3 Yes No Lighted or not lighted Replace the inverter P C board 2 Is there amplitude of 10 to 20 VDC between the indoor terminal block 6 DQG 6 RQ UPDWLRQ RI VHULDO VLJQDO Yes Check the wiring If there are any error of the indoor outdoor conn...

Page 26: ...eration again to prevent hazards N Check the defrost heater SUZ KA09 12 15NAH2 Check the following points before checking electric continuity 1 Does the resistance of ambient temperature thermistor have the characteristics Refer to 10 6 1 2 Is the resistance of defrost heater normal Refer to 10 4 3 Is the heater protector closed 4 Are both ambient temperature thermistor and circuit of defrost heat...

Page 27: ...OG VWUHQJWK RU WKH LQVWDOODWLRQ FRQGLWLRQ FRPELQDWLRQ RI VSHFL F FRQGLWLRQV VXFK DV DQWHQQDV RU ZLULQJ Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layou...

Page 28: ...931 208 230 VAC Outdoor heat exchanger temperature thermistor RT68 CN644 Jumper wire for pre heat control setting JK Heater connector CN722 SUZ KA09 12 15NAH2 Fuse F801 T3 15AL250V Back side of unit LEV connector CN724 Output to drive outdoor fan motor CN932 LED 4 14 32 50 68 86 104 0 10 20 30 40 50 60 70 80 90 100 Temperature F Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor h...

Page 29: ...d during the heating thermo OFF Stop 25 125 1 Set fan speed 2 27 127 1 2 Detection of abnormality of the pipe temperature P8 1 28 128 2 Set temperature in heating 24 124 mode 3 Refer to the table below Refer to the table below Available Not available Fan speed during the cooling thermo OFF Set fan speed Stop Available Not available Heater control 2 SEZ SLZ Set temp 4 5 F ON SEZ SLZ Set temp 1 8 F ...

Page 30: ...e to make the maintenance setting Maintenance password is required Note The initial maintenance password is 9999 Change the default password as necessary to prevent unauthorized access Have the password available for those who need it If you forget your maintenance password you can initialize the password to the default password 9999 by pressing and holding the F1 and F2 buttons simultaneously for...

Page 31: ...change the setting number with the F3 or F4 button 1 Select Service from the Main menu and press the button Checking the indoor unit No When the button is pressed the target indoor unit will start fan operation If the unit is common or when running all units all indoor units for the selected refrigerant address will start fan operation F1 F2 F3 F4 Function setting Ref address Sending data Grp 5 Wh...

Page 32: ...ING PROCEDURE PHOTOS FIGURES 1 Removing the cabinet 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it 3 Remove the screws fixing the conduit cover 4 Remove the conduit cover Photo 4 5 Remove the screw fixing the conduit plate Photo 5 6 Remove the conduit plate 7 Disconnect the power supply wire and indoor outdoor connecting wire 8 Remove the screws fixing the ...

Page 33: ...ing screws of the terminal block support and the back panel 6 Remove the inverter assembly 7 Remove the screw of the ground wire and screw of the ter minal block support 8 Remove the heat sink support from the P C board support 9 Remove the screw of the inverter P C board and remove the inverter P C board from the P C board support Photo 6 3 Removing R V coil 1 Remove the cabinet and panels Refer ...

Page 34: ...tor and discharge temperature ther mistor CN643 Ambient temperature thermistor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its holder 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder Photo 8 Photo 9 ...

Page 35: ...35 OCH699 ...

Page 36: ...FICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Published Dec 2018 No OCH699 Made in Japan Specifications are subject to change without notice ...

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