Mitsubishi Electric Mr.Slim MSY-D30NA Service Manual Download Page 170 | Manualshive

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10

TROUBLESHOOTING

10-1. CAUTIONS 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, then after con-

firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.

2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic

control P.C. board.

3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.
4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the

components.

5) When connecting or disconnecting the connectors, hold the connector housing. DO NOT pull the lead wires.

3. Troubleshooting procedure

1) Check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality.
To make sure, check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting

service work.

2) Before servicing, check that the connector and terminal are connected properly.
3) When the electronic control P.C. board seems to be defective, check the copper foil pattern for disconnection and the

components for bursting and discoloration.

4) Refer to 10-2. and 10-3.

<Correct>

Lead wiring

Connector housing

<Incorrect>

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA

MUZ-GE24NA

MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2
MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH
MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2
MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA

MUY-GE24NA

MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2

OBH549G

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Summary of Contents for Mr.Slim MSY-D30NA

Page 1: ...ING 19 10 DISASSEMBLY INSTRUCTIONS 32 Models MSZ D30NA MSZ D30NA 8 MSZ D36NA MSZ D36NA 8 MSY D30NA MSY D30NA 8 MSY D36NA MSY D36NA 8 No OBH501 REVISED EDITION C INDOOR UNIT Outdoor unit service manual MUZ D NA Series OBH502 MUY D NA Series OBH502 NOTE RoHS compliant products have G mark on the spec name plate PARTS CATALOG OBB501 Please void OBH501 REVISED EDITION B Revision C MSZ D30 D36NA 8 and ...

Page 2: ...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 Revision C MSZ D30 D36NA 8 and MSY D30 D36NA 8 have bee...

Page 3: ...1 Electronic control P C board has been changed MSZ D36NA MSZ D36NA 8 1 Electronic control P C board has been changed MSY D30NA MSY D30NA 8 1 Electronic control P C board has been changed MSY D36NA MSY D36NA 8 1 Electronic control P C board has been changed TECHNICAL CHANGES 1 ...

Page 4: ...lergy Enzyme Filter ACCESSORIES MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Installation plate 1 Installation plate screw 4 25 mm 7 Remote controller holder 1 Screw for 3 5 1 6 mm Black 2 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape Used for left or left rear piping 2 L Joint pipe 1 Conduit plate 1 Air cleaning filter 2 PART NAMES A...

Page 5: ...576 763 798 HEAT Dry 445 639 848 887 445 639 848 887 Moisture removal pt h 9 9 11 3 11 9 Sound level Low Med High Powerful Cooling dB A 32 42 49 51 Heating 34 42 49 50 34 42 49 50 Cond drain connection O D in 5 8 Dimensions W in 46 1 16 D 11 5 8 H 14 3 8 Weight Ib 40 External finish Munsell 1 0Y 9 2 0 2 Remote controller Wireless type Control voltage by built in transformer 12 24 VDC NOTE Test con...

Page 6: ...anged inside the room Mode Condition Intake air temperature F Indoor Outdoor DB WB DB WB Cooling Standard temperature 80 67 95 Maximum temperature 90 73 115 Minimum temperature 67 57 14 Maximum humidity 78 Heating Standard temperature 70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 14 13 Model Mode Function Airlow CFM Air speed ft sec Coverage range ft MSZ D30NA MSZ D36NA HEA...

Page 7: ...1 5 8 1 7 8 1 8 5 3 8 5 7 8 2 5 8 2 1 2 2 15 16 ø1 1 4 O D ø9 16 I D ø1 15 16 O D ø1 1 4 I D ø3 8 19 11 16 Flared connection ø3 8 ø5 8 16 7 8 Joint connection ø5 8 Joint ø1 15 16 O D ø1 1 4 I D ø5 8 Flared connection ø5 8 Inslation ø1 1 8 Connected part ø9 16 O D 4 11 16 or more 8 11 16 or more 9 3 8 or more 4 3 16 or more 3 8 or more 2 3 16 or more In case of left left back or left under piping u...

Page 8: ...8 MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA WIRING DIAGRAM 5 MSZ D30NA 8 MSZ D36NA 8 MSY D30NA 8 MSY D36NA 8 ...

Page 9: ...ndoor heat exchanger Room temperature thermistor RT11 Refrigerant pipe ø5 8 with heat insulator Flared connection Indoor coil thermistor RT12 Main Refrigerant pipe ø3 8 with heat insulator Distributor Indoor coil thermistor RT13 Sub Strainer Joint Flared connection Joint connection REFRIGERANT SYSTEM DIAGRAM 6 ...

Page 10: ...nit The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set The setting will be cancelled if the breaker has turned off or the power supply has shut down Please conduct the above setting once again after the power has restored How to modify the remote controller P C board Remove batteries before modification The board has a...

Page 11: ...s are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller If main power is turned OFF or a power failure occurs while AUTO START STOP timer is active the timer setting is cancelled If the unit has been off with the remote controller before power failure the auto restart function does not work as the power button of the remote controller is off To pre...

Page 12: ...RD button OFF TIMER button RESET button POWERFUL button These pictures show MSZ type WIDE VANE button Vertical vane button FAN SPEED CONTROL button VANE CONTROL button Horizontal vane button MSZ D30NA MSZ D36NA MSY D30NA MSY D36NA Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state The following indication applies regardless of shape ...

Page 13: ...oom tem perature is low or when defrosting is being done the indoor fan will stop or rotate in Very Low speed 2 High pressure protection The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con densing pressure from increasing excessively When the temperature of indoor heat exchanger becomes too high the high pressure protection works Th...

Page 14: ...rol When the TOO COOL or TOO WARM button is pressed the microprocessor changes the set temperature considering the room temperature the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cool So this is called Fuzzy control and works only in I FEEL CONTROL mode In DRY mode of I FEEL CONTROL the set temperature doesn t change To raise the set temperature 2 4 F 1 ...

Page 15: ...anges to Angle 1 for dew prevention 7 SWING mode By selecting SWING mode with VANE CONTROL button the horizontal vane swings vertically 8 Cold air prevention in HEAT operation MSZ The horizontal vane position is set to Upward 9 ECONO COOL operation ECONOmical operation When ECONO COOL button is pressed in COOL mode set temperature is automatically set 3 6 F 2 C higher Also the horizontal vane swin...

Page 16: ...ng of standard position is performed a OPERATE STOP ON OFF button is pressed POWER ON OFF b SWING is started or finished c The power supply turns ON 4 SWING MODE By selecting SWING mode with WIDE VANE button the vertical vane swings horizontally The remote controller displays 5 WIDE MODE By selecting WIDE mode with WIDE VANE button indoor fan speed becomes faster than setting fan speed on the remo...

Page 17: ...etting a Press OFF TIMER button during operation b Set the time of the timer using TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 To release the timer To release ON timer press ON TIMER button To release OFF timer press OFF TIMER button TIMER is cancelled and the display of se...

Page 18: ...tion the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In case of latter normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation 8 11 CHANGING TEMPERATURE INDICATION F C 8 10 3 MINUTE TIME DELAY OPERATION When the s...

Page 19: ...g on and off before starting service work 2 Before servicing check that the connector and terminal are connected properly 3 When the electronic control P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to replace batteries Weak batteries may cause the remote control...

Page 20: ...unit is abnormal Check the blinking pattern and confirm the abnormal point with the indoor unit failure mode table Refer to 9 2 2 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The o...

Page 21: ...eristics of the main indoor coil thermistor the sub indoor coil thermistor 9 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 9 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emit during the 12 seconds the indoor fan ope...

Page 22: ...ft lamp Flash on and off at 0 5 sec ond intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Left lamp 2 time flash Cause Indoor unit Trouble of room tem perature indoor coil thermistor Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Left lamp 4 time flash Cause Indoor unit Trouble of indoor unit control system Left lamp 5 time flash Cause Outdoor unit Out...

Page 23: ...system Left lamp flashes 4 time flash 2 5 second OFF Indoor unit and outdoor unit do not operate It cannot properly read data in the nonvolatile memory of the indoor electronic control P C board Replace the indoor electronic control P C board 5 Outdoor power sys tem Left lamp flashes 5 time flash 2 5 second OFF Indoor unit and outdoor unit do not operate It consecutively occurs 3 times that the co...

Page 24: ...o 9 7 Test point diagram and voltage Indoor electronic control P C board the chart of thermistor Indoor fan motor MF Check 9 6 Horizontal vane motor MV1 Vertical vane motor MV2 Measure the resistance between the terminals with a tester Part temperature 50 86 F Horizontal vane motor MV1 Color of the lead wire Normal BRN other one 240 260 Ω Vertical vane motor MV2 Color of the lead wire Normal BRN o...

Page 25: ...sure the voltage between CN211 and 2 Measure the voltage between CN211 and If 12 seconds or more passes after EMERGENCY OPERATION switch is pressed the voltage mentioned above 2 goes 0 VDC although the indoor electronic control P C board is normal Is there 294 325 VDC between CN211 and and does the voltage between CN211 and rise to the range of 3 to 6 VDC within 12 seconds after EMERGEN CY OPERATI...

Page 26: ...eck if the unit operates with the remote controller Yes No Turn ON a radio to AM and press switch ON the remote controller Is noise heard from radio Yes No Replace the remote controller Are there any fluorescent lights of inverter or rapid start type within the range of 3 28 ft Yes No Reinstall the unit away from lights Attach a filter on receiving part Measure the voltage between receiver P C boa...

Page 27: ... indoor elec tronic control P C board Are the varistor NR11 burnt and the fuse F11 blown No No Yes Yes Be sure to check both the fuse and the varistor in any case Is the fuse F11 blown only Measure the resistance between and of the indoor fan motor connector to CN211 on the indoor electronic control P C board 1 2 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the tester...

Page 28: ...e the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Turn OFF the power supply Remove the short circuit between out door terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 VDC between outdoor terminal block S2 and S3 Confirmation of serial signal Yes No Is there any error of the in door outd...

Page 29: ...ength or the installation condition combination of specific conditions such as antennas or wiring 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 Layout of ...

Page 30: ... Auto restart function Solder the Jumper wire to JR07 Refer to 7 3 230 V AC Fuse F11 T3 15AL250V Indoor coil thermistor RT12 MAIN RT13 SUB Horizontal vane motor CN151 SW P C board Power monitor receiver P C board 12 V DC 5 V DC 3 6 V DC 15 V DC Fiducial terminal of cathode side on measur ing high voltage DC 325 V DC Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermisto...

Page 31: ...CN151 SW P C board Power monitor receiver P C board 12 V DC 5 V DC 3 6 V DC 15 V DC Fiducial terminal of cathode side on measur ing high voltage DC 325 V DC Power supply input Indoor fan motor CN211 Varistor NR11 Room temperature thermistor RT11 Timer short mode point JPG JPS Refer to 7 1 Vertical vane motor CN152 Cement resistor R111 Indoor coil thermistor RT12 MAIN RT13 SUB Room temperature ther...

Page 32: ...e indoor electronic control P C board 8 Remove the screw on lower side of the electrical box See photo 3 Remove the electrical box 9 Remove the indoor electronic control P C board 10 Remove the SW holder from the electrical box 11 Open the SW holder and pull out the SW P C board 12 Remove the power monitor receiver holder from the electri cal box 13 Open the power monitor receiver holder and pull ...

Page 33: ... of the vertical vane motor 6 Remove the vertical vane motor from the vertical vane motor unit 7 Disconnect the connector of vertical vane motor from the vertical vane motor 5 Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to 3 2 Remove the screws of the horizontal vane motor unit and pull out the horizontal vane motor unit 3 Disconnect the connector from the horizontal vane...

Page 34: ...band then pull out the indoor fan motor 10 Remove the screws of the left side of the heat exchanger 11 Lift the left side of the heat exchanger 12 Remove the line flow fan to the lower left Photo 7 Screws of the motor bed Screw of the motor band Photo 8 Screws of the left side of the heat exchanger Photo 9 Screw of the line flow fan Lead wire of the indoor coil thermistor HEAD OFFICE TOKYO BLDG 2 ...

Page 35: ...2 11 DISASSEMBLY INSTRUCTIONS 41 Models MUZ D30NA 1 U1 U2 MUZ D36NA 1 U1 U2 MUY D30NA 1 MUY D36NA 1 SPLIT TYPE AIR CONDITIONERS OUTDOOR UNIT Indoor unit service manual MSZ D NA Series OBH501 MSY D NA Series OBH501 NOTE RoHS compliant products have G mark on the spec name plate TM HFC utilized R410A No OBH502 REVISED EDITION C PARTS CATALOG OBB502 Revision C Errors in TROUBLESHOOTING have been corr...

Page 36: ...ly Never use any refrigerant other than that 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 ...

Page 37: ...Z D30NA U2 MUZ D36NA MUZ D36NA 1 MUZ D36NA U1 MUZ D36NA U2 MUY D30NA MUY D30NA 1 MUY D36NA MUY D36NA 1 1 Wiring diagram has been changed 2 Fan motor has been changed PART NAMES AND FUNCTIONS 2 MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA Piping Air outlet Drain hose Drain outlet Air inlet back and side 1 TECHNICAL CHANGES ...

Page 38: ...in circuit ampacity A 21 Fan motor F L A 0 93 Compressor Model TNB220FMCHT R L A 16 L R A 20 Refrigeration oil cc 870 NEO22 Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 55 55 56 56 Heating 57 57 Defrost method Reverse cycle Reverse cycle Dimensions W in 33 1 16 D 13 H 33 7 16 Weight Ib 141 126 141 126 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Contr...

Page 39: ... 15 Max temperature Heating at minimum compressor Speed 70 60 62 56 5 High temperature Heating at minimum compressor Speed 70 60 47 43 Frost Accumulation at rated compressor Speed 70 60 35 33 Frost Accumulation at Intermediate compressor Speed 5 70 60 35 33 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 3 4 OPERATING RANGE 1 PO...

Page 40: ...re open 4 inch or more 8 inch or more if there are obstacles to both sides Open as a rule 20 inch or more if the back both sides and top are open 14 in or more 4 in or more REQUIRED SPACE Unit inch MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 4 OUTLINES AND DIMENSIONS ...

Page 41: ...7 MUZ D30NA MUZ D30NA U1 MUZ D36NA MUZ D36NA U1 5 WIRING DIAGRAM ...

Page 42: ...8 MUZ D30NA 1 MUZ D30NA U2 MUZ D36NA 1 MUZ D36NA U2 ...

Page 43: ...9 MUY D30NA MUY D36NA ...

Page 44: ...10 MUY D30NA 1 MUY D36NA 1 ...

Page 45: ...t insulator O D 0 142 I D 0 094 1 31 32 3 6 2 4 50 Oil separator Strainer 100 High pressure Switch Capillary tube O D 0 071 x I D 0 024 x 39 3 8 1 8 x 0 6 x 1 000 O D 0 142 x I D 0 094 x 1 31 32 3 6 x 2 4 x 50 Capillary tube High pressure Switch Flared connection Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve with service port Capillary tube Refrigerant flow in cooli...

Page 46: ...ng to the calculation Model Outdoor unit precharged Refrigerant piping length one way ft 25 30 40 50 60 70 80 90 100 MUZ D30NA MUZ D36NA 4 lb 10 oz 0 2 96 8 88 14 80 20 72 26 64 32 56 38 48 44 40 Calculation X oz 2 96 5 oz ft Refrigerant piping length ft 25 Model Outdoor unit precharged Refrigerant piping length one way ft 25 30 40 50 60 70 80 90 100 MUY D30NA MUY D36NA 4 lb 0 1 08 3 24 5 40 7 56 ...

Page 47: ... 5 24 5 4 05 29 6 22 3 4 32 27 0 20 3 4 49 NOTE 1 IWB Intake air wet bulb temperature TC Total Capacity x103 Btu h SHC Sensible Heat Capacity x103 Btu h TPC Total Power Consumption kW 2 SHC is based on 80 F of indoor Intake air DB temperature 2 COOLING CAPACITY CORRECTIONS Refrigerant piping length one way ft 25 std 40 65 100 MUZ D30NA MUZ D36NA MUY D30NA MUY D36NA 1 0 0 95 0 878 0 713 3 HEATING C...

Page 48: ...63 CFM Airflow 65 75 85 95 105 115 Outdoor intake air DB temperature F Total power consumption kW Total capacity 10 3 Btu h 71 67 63 71 67 63 27 29 31 33 35 37 39 41 43 Indoor intake air WB temperature F 5 2 4 8 4 4 4 0 3 6 Indoor intake air WB temperature F SHF at rating condition 0 62 763 CFM Airflow 65 75 85 95 105 115 Outdoor intake air DB temperature F Total power consumption kW Total capacit...

Page 49: ...rature F MUZ D30NA PSIG Condensing pressure 86 80 75 70 68 70 75 80 85 90 95 100 105 F 90 100 110 120 130 140 150 Suction pressure Outdoor ambient temperature PSIG 86 80 75 70 68 70 75 80 85 90 95 100 105 F 260 300 340 380 420 460 500 540 580 Indoor DB temperature F Outdoor ambient temperature Indoor DB temperature F MUY D30NA PSIG Condensing pressure 86 80 75 70 68 70 75 80 85 90 95 100 105 F 90 ...

Page 50: ... any frost MUZ D36NA MUZ D30NA 75 70 65 75 70 65 PSIG PSIG Condensing pressure Outdoor ambient temperature 14 20 25 30 35 40 45 50 55 60 65 70 F 200 500 480 460 440 420 400 380 360 340 320 300 280 260 240 220 Indoor DB temperature F Suction pressure Outdoor ambient temperature 14 20 25 30 35 40 45 50 55 58Hz 58Hz 60 65 70 F 140 150 130 120 110 100 90 80 70 60 50 Indoor DB tem perature F MUY D36NA ...

Page 51: ...46 18 65 17 86 17 25 15 56 15 05 13 56 18 95 17 26 Fan motor current A 0 80 0 72 Refrigerant circuit Condensing pressure PSIG 468 404 480 420 453 475 Suction pressure PSIG 126 96 122 94 125 119 Discharge temperature F 186 8 169 7 198 7 168 8 191 3 197 1 Condensing temperature F 126 5 114 3 128 5 117 0 123 8 127 4 Suction temperature F 45 5 29 8 48 0 29 1 54 7 48 6 Comp shell bottom temperature F 1...

Page 52: ...equency of compressor 0 50 100 150 0 5 1 0 1 5 Hz 0 50 100 150 0 5 1 0 1 5 Hz 0 50 100 150 0 5 1 0 1 5 Hz 0 50 100 150 0 5 1 0 1 5 Hz Capacity correction factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operational frequency of compressor Correction of H...

Page 53: ...d continues to operate for 30 minutes 3 Compressor operates at rated frequency in COOL mode or 58 Hz in HEAT mode 4 Indoor fan operates at High speed 5 After 30 minutes test run operation finishes and EMERGENCY OPERATION starts Operation frequency of compressor varies 6 To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller ...

Page 54: ...on Ambient temperature thermistor Cooling Low ambient temperature operation 8 2 R V COIL CONTROL MUZ Heating ON Cooling OFF Dry OFF NOTE The 4 way valve reverses for 5 seconds right before start up of the compressor ON OFF ON OFF Outdoor fan motor Compressor 5 seconds 15 seconds Outdoor fan motor ON OFF COOL 5 seconds HEAT 5 seconds R V coil ON OFF ON or OFF ON or OFF 8 1 OUTDOOR FAN MOTOR CONTROL...

Page 55: ...ing How to activate pre heat control 1 Turn OFF the power supply for the air conditioner before making the setting 2 Set the 2nd Dip Switch of SW1 on the outdoor electronic control P C board to ON to activate pre heat control function 1 2 3 4 ON 9 2 CHANGE IN DEFROST SETTING Changing defrost finish temperature 1 Turn OFF the power supply for the air conditioner before making the setting 2 Set the ...

Page 56: ... When removing the electronic control P C board hold the edge of the board with care NOT to apply stress on the components 5 When connecting or disconnecting the connectors hold the housing of the connector DO NOT pull the lead wires 3 Troubleshooting procedure 1 First check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality To make sure check how ...

Page 57: ...buttons for another 3 seconds Confirm that the indicators on the LCD screen shown in the right figure are all displayed Then release the buttons Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 1 Judgment of indoor outdoor abnormality Before blinking does the left lamp of OPERATION INDICA TOR lamp s...

Page 58: ...ON again Press RESET button of the remote controller Repair the defective parts The outdoor unit is normal Release the failure mode recall function accord ing to the left mentioned procedure Deleting the memorized abnormal condition After repairing the unit recall the failure mode again according to Setting up the failure mode recall function 10 2 1 Press OPERATE STOP ON OFF button of the remote c...

Page 59: ...ng Lighting The outdoor heat exchanger temperature exceeds 158 F 70 C during cooling or the indoor gas pipe temperature exceeds 158 F 70 C during heating MUZ Check refrigerant circuit and refrigerant amount Check the stop valve 7 time flash Fin temperature 3 times Goes out The fin temperature exceeds 189 F 87 C during opera tion Check around outdoor unit Check outdoor unit air pas sage Refer to 10...

Page 60: ...peration Check the voltage of power supply Replace the power board Bus bar voltage 1 5 times Goes out The bus bar voltage exceeds 400 V or falls to 200 V or below during compressor operating Bus bar voltage 2 Even if this protection stop is performed continuously 3 times it does not mean the abnormality in outdoor power system 6 times Goes out The bus bar voltage exceeds 400 V or falls to 50 V or ...

Page 61: ...eck the connecting wire among outdoor elec tronic control P C board noise filter P C board and power board 10 Outdoor unit stops and restarts 3 minutes later is repeated Twice Goes out IPM protection Overcurrent is detected after 30 seconds of compressor start up Reconnect compressor connector Refer to 10 5 How to check inverter compres sor Refer to 10 5 Check of compressor start failure Check the...

Page 62: ...The discharge temperature exceeds 212 F 100 C during operation Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV Refer to 10 5 Check of outdoor thermistors 23 4 times Lighting Low discharge temperature protection The frequency of the compressor is kept 80 Hz or more and the discharge temperature is kept under 102 F 39 C for more than 20 minutes Refer to 10 5 Check of LEV ...

Page 63: ...h your hands to warm it up Refer to 10 6 Test point diagram and voltage 1 Outdoor electron ic control P C board for the chart of thermistor Compressor Measure the resistance between terminals using a tester Temperature 14 104 F 10 40 C Normal 1 24 1 53 Ω Outdoor fan motor Measure the resistance between lead wires using a tester Temperature 14 104 F 10 40 C Color of lead wire Normal RED BLK 13 16 Ω...

Page 64: ...mpressor winding resistance between the compressor terminals Is the resistance between each terminal normal Yes No Replace the compressor Reconnect the lead wire of compressor and turn on power supply to indoor and outdoor unit 3 minutes later starts EMERGENCY OPERATION Clarify the causes by counting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lo...

Page 65: ...door power board Is the thermistor normal Refer to 10 6 1 Reconnect the connector of thermistor Turn ON the power supply and press EMERGENCY OPERATION switch No Replace the thermistor except RT64 When RT64 is abnormal replace the outdoor power board Does the unit operate for 10 minutes or more without showing thermistor abnormality OK Cause is poor contact Replace the outdoor power board Yes Yes N...

Page 66: ...oil Replace the 4 way valve Replace the noise filter P C board Yes Replace the electronic control P C board Cooling operation does not work Is there voltage of 208 230 VAC between pin1 and pin 2 at connector CN912 Disconnect the lead wire leading to the compressor 3 minutes after turning on the power supply start EMERGENCY OPERATION in COOL mode 1 2 Turn OFF power supply of indoor and outdoor unit...

Page 67: ...DC fan motor Replace the outdoor electronic control P C board Yes Yes No Fixed to either 5 or 0 VDC No No Yes Is there voltage of 208 230 VAC in the power supply terminal block Check the connecting of parts of main power supply circuit Check the power supply cable Turn ON power supply Is the output voltage from the noise filter P C board 208 230 VAC Replace the noise filter P C board No Yes No Yes...

Page 68: ...or start 1 Replace the compressor Compressor start failure Activate pre heat control Refer to 9 1 PRE HEAT CONTROL No Yes Does the compressor run for 10 seconds or more after it starts Check the refrigerant circuit Check the stop valve Yes No Confirm that 1 4 is normal Electrical circuit check Contact of lead wire leading to compressor Output voltage of the outdoor electronic control P C board and...

Page 69: ...ghted or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20 VDC between outdoor terminal block S2 and S3 Confirmation of serial signal Yes No Is there any...

Page 70: ...voltage of power supply Confirm outdoor unit failure mode recall function Refer to 10 2 2 Blink 5 times Confirm LED1 indication lamp on the outdoor electronic control P C board Replace the power board Blink 9 times Replace the outdoor elec tronic control P C board Turn OFF power supply before removing P C board Confirm LED1 indication lamp on the outdoor electronic con trol P C board Turn ON power...

Page 71: ...ength or the installation condition combination of specific conditions such as antennas or wiring 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 Layout of ...

Page 72: ... fan motor Defrost thermistor RT61 MUZ CN661 Discharge temperature thermistor RT62 CN661 Outdoor heat exchanger temperature thermistor RT68 CN661 Rush current relay R V coil 12 VDC 15 V 15 V CN931 CN701 Signal transmission To power board 5 VDC pulse wave GND CN702 Signal reception From power board 5 VDC pulse wave GND power board CN781 CN795 12 VDC pulse wave LEV 32 50 68 86 104 122 140 176 194 12...

Page 73: ...36NA 2 Noise filter P C board MUZ CN912 R V coil 208 230 VAC 60 Hz Output 208 230 VAC 60 Hz Input 208 230 VAC 60 Hz Output F64 FUSE T2AL250V CN902 To power board CN903 To power board CN61 NR64 VARISTOR CN901 To electronic control P C board ...

Page 74: ... the ground CN5 Primary current detection Connect to the noise filter CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5 VDC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15 V 7 5 15 V Signal reception From electronic control P C board 5 VDC pulse wave CN3 Fin temperature thermistor RT64 Red White 1 3 ...

Page 75: ...Locking lever Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Photo 2 Photo 1 Photo 3 Screws of the cabinet Screws of the cabinet Screw of the top panel Screws of the top panel Screws of the cabinet Screw of the service panel Screw of the valve cover Set screws of the back panel Screw of the motor support Screws of the back panel ...

Page 76: ...d wires on the electronic control P C board 7 Remove the electronic control P C board from the inverter assembly 8 Remove the screws fixing the power board assembly 9 Disconnect all connectors and lead wires on the power board 10 Remove the power board from the inverter assembly 11 Disconnect all connectors and lead wires on the noise filter P C board 12 Remove the noise filter P C board from the ...

Page 77: ...ermistor from its holder MUZ 4 Pull out the discharge temperature thermistor from its hold er Photo 4 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder 5 Removing outdoor fan motor 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the following connectors Electronic contro...

Page 78: ...Photo 8 7 Removing the reactor 1 Remove the top panel cabinet service panel and the back panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Photo 9 Brazed parts of 4 way valve R V coil Photo 10 Brazed part of the discharge pipe Brazed part of the suction pipe HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright...

Page 79: ...Z GE NA MUY GE NA Series OBH549 MXZ B NA Series OB444 NOTE RoHS compliant products have G mark on the spec name plate PARTS CATALOG OBB548 Revision D MSZ GE06 09 12 15 18NA 9 and MSY GE09 12 15 18NA 9 have been added Please void OBH548 REVISED EDITION C MSZ GE06NA MSZ GE09NA MSZ GE12NA MSZ GE15NA MSZ GE18NA MSZ GE24NA MSY GE09NA MSY GE12NA MSY GE15NA MSY GE18NA MSY GE24NA Models MSZ GE06 09 12 15 ...

Page 80: ...m malfunction unit breakdown or accidents caused by failure to follow the instructions MSZ GE06NA MSZ GE06NA 8 MSZ GE09NA MSZ GE09NA 8 MSZ GE12NA MSZ GE12NA 8 MSZ GE15NA MSZ GE15NA 8 MSZ GE18NA MSZ GE18NA 8 MSY GE09NA MSY GE09NA 8 MSY GE12NA MSY GE12NA 8 MSY GE15NA MSY GE15NA 8 MSY GE18NA MSY GE18NA 8 1 These models have been modified to be compatible with Honeywell remote controller 2 Indoor elec...

Page 81: ...ir lter Catechin air lter GE NA Air inlet Heat exchanger Front panel Air cleaning lter Anti Allergy Enzyme Filter Nano platinum lter GE NA 8 9 Display section 2 PART NAMES AND FUNCTIONS ACCESSORIES Installation plate 1 Installation plate fixing screw 4 25 mm 5 Remote controller holder 1 Fixing screw for 3 5 16 mm Black 2 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape Us...

Page 82: ...ilter Air outlet Horizontal vane Heat exchanger MSZ GE24NA MSY GE24NA ACCESSORIES Installation plate 1 Installation plate fixing screw 4 25 mm 7 Remote controller holder 1 Fixing screw for 3 5 16 mm Black 2 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape Used for left or left rear piping 1 Air cleaning filter 2 OBH548D ...

Page 83: ...NA MSZ GE24NA MSY GE24NA Power supply V phase Hz 208 230 1 60 Max fuse size time delay Disconnect switch A 15 20 Min circuit ampacity A 1 0 Fan motor F L A 0 76 Airflow Super High High Med Low Quiet GE15 18 Powerful High Med Low GE24 COOL Dry Wet CFM 533 420 335 272 205 498 385 300 237 170 533 420 339 275 230 498 385 304 240 194 738 628 469 388 661 562 420 347 HEAT Dry CFM 463 367 304 247 205 512 ...

Page 84: ...70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 4 5 3 1 OPERATING RANGE 1 POWER SUPPLY Rated voltage Guaranteed voltage V Indoor unit 208 230 V 1 phase 60 Hz Min 187 208 230 Max 253 Model Mode Function Airflow CFM Air speed ft s Coverage ft MSZ GE06NA HEAT Dry 406 20 6 29 5 COOL Dry 321 16 3 23 5 Wet 286 14 5 21 0 MSZ GE09NA MSY GE09NA HEAT Dry 406 20 6 29 5 COOL Dry 321 16 3...

Page 85: ...ion plate Piping Drain hose Piping Insulation ø1 3 8 O D Liquid line ø1 4 19 11 16 Flared connection ø1 4 Gas line ø3 8 16 15 16 Flared connection ø3 8 GE06 09 12NA ø1 2 GE15 18NA Drain hose Insulation ø1 1 8 O D Connected part ø5 8 O D Piping Insulation ø1 3 8 O D Liquid line ø1 4 19 11 16 Flared connection ø1 4 Gas line ø3 8 16 15 16 Flared connection ø3 8 GE06 09 12NA ø1 2 GE15 18NA Drain hose ...

Page 86: ... 5 8 2 1 2 12 13 16 1 8 3 15 16 4 7 8 6 5 16 4 5 16 70 9 3 8 3 16 8 1 4 27 32 7 1 4 1 2 Piping Insulation Ø2 O D Liquid line Ø3 8 19 11 16 Flared connection Ø3 8 Gas line Ø1 2 16 15 16 Flared connection Ø5 8 Drain hose Insulation Ø1 1 8 Connected part Ø5 8 O D Air out Piping Drain hose 7 16 1 Oblong hole 7 16 3 4 Oblong hole Installation plate Indoor unit Wall hole Ø3 Air in Installation plate 3 4...

Page 87: ...9NA MSZ GE12NA MSZ GE15NA MSZ GE18NA MSY GE09NA MSY GE12NA MSY GE15NA MSY GE18NA 5 WIRING DIAGRAM MSZ GE06NA 8 MSZ GE09NA 8 MSZ GE12NA 8 MSZ GE15NA 8 MSZ GE18NA 8 MSY GE09NA 8 MSY GE12NA 8 MSY GE15NA 8 MSY GE18NA 8 OBH548D ...

Page 88: ...10 MSZ GE06NA 9 MSZ GE09NA 9 MSZ GE12NA 9 MSZ GE15NA 9 MSZ GE18NA 9 MSY GE09NA 9 MSY GE12NA 9 MSY GE15NA 9 MSY GE18NA 9 MSZ GE24NA MSY GE24NA OBH548D ...

Page 89: ...rigerant pipe ø1 4 with heat insulator Indoor coil thermistor RT12 main Indoor coil thermistor RT13 sub Refrigerant flow in cooling Refrigerant flow in heating 6 REFRIGERANT SYSTEM DIAGRAM MSZ GE24NA MSY GE24NA Indoor heat exchanger Flared connection Room temperature thermistor RT11 Flared connection Refrigerant pipe ø5 8 with heat insulator Refrigerant pipe ø3 8 with heat insulator Indoor coil th...

Page 90: ...1 After modification press the RESET button NOTE For modification take out the batteries and press the OPERATE STOP ON OFF button twice or 3 times at first After finish modification put back the batteries then press the RESET button J2 J1 MSZ GE06NA MSZ GE09NA MSZ GE12NA MSZ GE15NA MSZ GE18NA MSZ GE24NA MSY GE09NA MSY GE12NA MSY GE15NA MSY GE18NA MSY GE24NA Table 1 1 unit operation 2 units operati...

Page 91: ... drop or the rush of the starting current by adding to the system that allows the units to start one by one 7 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the set temperature and the fan speed are memorized by the indoor electronic control P C board AUTO RESTART FUNCTION automatically starts operation in the same mode just before the shut...

Page 92: ...PERATE STOP ON OFF button FAN SPEED CONTROL button OPERATION SELECT button ECONO COOL button Indication of remote controller model is on back 8 MICROPROCESSOR CONTROL E g MSZ type MSZ GE06NA MSZ GE09NA MSZ GE12NA MSZ GE15NA MSZ GE18NA MSY GE09NA MSY GE12NA MSY GE15NA MSY GE18NA MSZ GE24NA MSY GE24NA Signal transmitting section Operation display section Indication of remote controller model is on b...

Page 93: ... 61 88 F 16 31 C 1 Coil frost prevention The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting When the temperature of indoor heat exchanger becomes too low the coil frost prevention mode works The indoor fan operates at the set speed and the compressor stops This mode continues until the temperature of indoor heat exch...

Page 94: ...Only indoor fan operates Outdoor unit does not operate 8 5 I FEEL CONTROL OPERATION MSY 1 Press OPERATE STOP ON OFF button on the remote controller OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone 2 Select I FEEL CONTROL mode with OPERATION SELECT button 3 The operation mode is determined by the room temperature at start up of the operation Once the mode is fixed the mode does...

Page 95: ...others for heating the operation mode of the indoor unit that operates first is selected Other indoor units cannot operate and operation indicator lamp flashes as shown in the figure below In this case please set all the indoor units to the same operation mode When indoor unit starts the operation while the defrosting of outdoor unit is being done it takes a few minutes max 10 minutes to blow out ...

Page 96: ...nditioner can keep comfort As a result energy can be saved To cancel this operation select a different mode or press one of the following buttons in ECONO COOL operation ECONO COOL VANE CONTROL or POWERFUL MSZ MSY GE24NA button 10 POWERFUL operation MSZ GE24NA MSY GE24NA The air conditioner automatically adjusts the fan speed and the set temperature and operates the POWERFUL mode The POWERFUL mode...

Page 97: ...mer setting a Press OFF TIMER button during operation b Set the time of the timer using TIME SET buttons and Each time FORWARD button is pressed the set time increases by 10 minutes each time BACKWARD button is pressed the set time decreases by 10 minutes 2 To release the timer To release ON timer press ON TIMER button To release OFF timer press OFF TIMER button TIMER is cancelled and the display ...

Page 98: ... operation This operation is for servicing The indoor fan runs at High speed and the temperature control does not work After 30 minutes of test run operation the system shifts to EMERGENCY COOL HEAT MSZ MODE with a set temperature of 75 F 24 C The fan speed shifts to Med All protective operations such as the coil frost prevention works even in the test run or emergency operation In the test run or...

Page 99: ...sure check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting ser vice work 2 Before servicing check that the connector and terminal are connected properly 3 When the P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to replace batter...

Page 100: ...nit failure mode table Refer to 9 2 2 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The outdoor unit is abnormal Check the blinking pattern and identify the abnormal point by referr...

Page 101: ...f the main indoor coil ther mistor the sub indoor coil thermistor 9 7 3 time flash 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 9 6 How to check miswiring and serial signal error 11 time flash 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted for 12 seconds after the indoor fan motor is o...

Page 102: ...Flash ON and OFF at 0 5 second intervals Cause Indoor Outdoor unit Miswiring or trouble of serial signal Upper lamp 2 time flash Cause Indoor unit Trouble of room temperature indoor coil thermistor Upper lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Upper lamp 4 time flash Cause Indoor unit Trouble of indoor unit control system Upper lamp 5 time flash Cause Outdoor unit Outdoor p...

Page 103: ...the indoor electronic control P C board Replace the indoor electronic control P C board 5 Outdoor power sys tem Upper lamp flashes 5 time flash 2 5 second OFF It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor unit service manual Check the ...

Page 104: ...A MSY GE24NA Part name Check method and criterion Figure Room temperature thermistor RT11 Indoor coil thermistor RT12 RT13 Measure the resistance with a tester Refer to 9 7 Test point diagram and voltage 2 or 3 Indoor electronic control P C board for the chart of thermistor Indoor fan motor MF Check 9 6 MSZ GE06 09 12 15 18NA MSY GE09 12 15 18NA Vane motor MV Measure the resistance between the ter...

Page 105: ...he indoor P C board is normal Does the voltage between CN211 and on the power P C board rise to the range of 2 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the indoor fan motor Yes No The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Measure the voltage between CN211 and while the fan motor is ...

Page 106: ...ure the voltage between CN211 and If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed the voltage measured at 2 above goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the indoor electronic control P C board rise to the range of 3 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the indoor fan motor Yes Th...

Page 107: ... receiving part Measure the voltage between power moni tor receiver SW P C board connector CN20A No 2 and No 3 when the remote controller button is pressed Refer to 9 7 3 Is the voltage approximately 4 VDC No Yes Replace indoor electronic control P C board Replace power monitor receiver SW P C board MSZ GE06 09 12 15 18NA MSY GE09 12 15 18NA 1 Look at the image of the signal transmitting section o...

Page 108: ...oor power P C board No Is the resistance of resistor R111 approxi mately 4 Ω No Replace the indoor power P C board the indoor terminal P C board and the indoor fan motor Replace the indoor electronic control P C board Measure the resistance of the vane motor coil Refer to 9 5 Short circuit Replace the vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is r...

Page 109: ... the resistance between CN211 and of the indoor fan motor connector Short circuit Replace the indoor fan motor Short circuit Replace the horizontal vane motor and the indoor electronic control P C board Turn OFF the power supply Check both parts side and pattern side of the indoor electronic control P C board visually Replace the varistor NR11 and fuse F11 3 Are the varistor NR11 burnt and the fus...

Page 110: ...ng 3 Yes No Lighted or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Is there amplitude of 10 to 20 VDC between indoor terminal block S2 and S3 Confirmation of serial signal Yes Check the wiring If there are any error of the indoor outdoor connecting wire such as the damage of the wire intermedia...

Page 111: ...ng Bridge the outdoor terminal block S2 and S3 1 B 1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Turn 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 Repl...

Page 112: ... strength or the installation condition combination of specific conditions such as antennas or wiring 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 Layout...

Page 113: ...ltage DC 15 VDC 3 6 VDC 0 6 V Timer short mode point JPG JPS Refer to 7 1 Room temperature thermistor RT11 CN111 Indoor coil thermistor RT12 RT13 CN112 Vane motor CN151 Connector to Indoor power P C board CN10A 12 VDC 5 VDC To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 3 Emergency operation switch E O SW SW1 2 Indoor electronic control P C board GND Room temperature th...

Page 114: ... power P C board CN10A 12 VDC 5 VDC To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 3 Emergency operation switch E O SW SW1 Indoor electronic control P C board GND Room temperature thermistor RT11 Indoor coil thermistor RT12 RT13 Temperature F Resistance kΩ 32 50 68 86 104 122 140 MSZ GE06 09 12 15 18NA 8 MSY GE09 12 15 18NA 8 OBH548D ...

Page 115: ...C 294 325 VDC Timer short mode point JPG JPS Refer to 7 1 Room temperature thermistor RT11 CN111 Indoor coil thermistor RT12 RT13 CN112 Vane motor CN151 Connector to Indoor power P C board CN10A 12 VDC 5 VDC To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 3 Emergency operation switch E O SW SW1 Indoor electronic control P C board GND Room temperature thermistor RT11 Indo...

Page 116: ... monitor receiver SW P C board Emergency operation switch E O SW SW1 CN20A Refer to 9 6 JR07 JR77 Indoor terminal P C board Indoor electronic control P C board Indoor fan motor CN211 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 or 15 VDC Resistor R111 Timer short mode point JPG JPS Refer to 7 1 Varistor NR11 Terminal block To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 ...

Page 117: ...e the fuse after removing the indoor terminal P C board from the electrical box Power monitor receiver SW P C board Fuse F11 Varistor NR11 Terminal block Indoor fan motor CN211 294 325 VDC GND high voltage DC 15 VDC 3 6 VDC 0 or 15 VDC Resistor R111 To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 3 Timer short mode point JPG JPS Refer to 7 1 Vane motor CN151 CN152 5 VDC ...

Page 118: ...Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Terminal with locking mechanism Detaching points The terminal which has the locking mechanism can be detached as shown below There...

Page 119: ... electronic control P C board Photo 2 Photo 3 Photo 4 3 Removing the indoor power P C board the indoor terminal P C board and the electrical box 1 Remove the panel Refer to 1 and the corner box 2 Remove the indoor outdoor connecting wire and the indoor electric control P C board holder Refer to 2 2 8 3 Remove the screw of the conduit cover and the con duit cover 4 Remove the screw of the conduit p...

Page 120: ...the drain hose from the nozzle assembly and remove the nozzle assembly Photo 5 5 Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to 5 2 Remove the screws of the horizontal vane motor unit 3 Disconnect the connector from the horizontal vane motor 4 Remove the screws of the horizontal vane motor 5 Remove the horizontal vane motor from the horizontal vane motor unit 42 Screws of...

Page 121: ...and 6 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor 8 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assembling it Refer to Photo 9 9 Remove the screws fixing the left side of the heat exchanger 10 Lift the heat exchanger and pull out the line flow fan to the lower left Photo 9 Photo...

Page 122: ...r monitor receiver holder and pull out the power monitor receiver SW P C board 9 Disconnect all the connectors on the indoor electronic control P C board and unhook all lead wires 10 Remove the screw of the terminal block on the indoor terminal P C board 11 Remove the indoor terminal P C board and the indoor electronic control P C board 3 Removing the indoor electrical box 1 Remove the panel Refer...

Page 123: ... Remove the screw of the vertical vane motor unit and pull the vertical vane motor unit 4 Remove the screws of the vertical vane motor unit cover 5 Remove the crank of the vertical vane motor unit from the shaft of the vane motor 6 Remove the vertical vane motor from the vertical vane motor unit 7 Disconnect the connector of vertical vane motor from the vertical vane motor 6 Removing the horizonta...

Page 124: ... 8 Release the hooks of the motor band Remove the motor band Pull out the indoor fan motor 9 Remove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assembling it Photo 9 10 Remove the screws fixing the left side of the heat exchanger 11 Lift the heat exchanger and pull out the line flow fan to the lower left Photo 8 Photo 9 Photo 10...

Page 125: ...ked position Do not pull the lead wire when removing the indoor coil thermistor Holder shape Clip shape When fixing the indoor coil thermistor to the clip shape holder shape part the lead wire should point down 1 Set the indoor coil thermistor in the center of the clip shape part 2 Check the marked mounting position 3 Mount the clip shape part Position and procedure for mounting the clip shape par...

Page 126: ... REVISED EDITION C Distributed in Apr 2011 No OBH548 REVISED EDITION B Distributed in Sep 2010 No OBH548 REVISED EDITION A 5 Distributed in Jul 2009 No OBH548 5 Made in Japan New publication effective Oct 2014 Specifications subject to change without notice HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN ...

Page 127: ...A2 MUY GE12NA NA2 MUY GE15NA 1 NA2 MUY GE18NA 1 MUY GE24NA MUZ GE09NAH NAH2 MUZ GE12NAH NAH2 MUZ GE15NAH NAH2 HFC utilized R410A TM OUTDOOR UNIT SERVICE MANUAL No OBH549 REVISED EDITION G Please void OBH549 REVISED EDITION F Revision G The descriptions of the expansion valve coil have been corrected 10 4 Some descriptions have been modified CONTENTS 1 TECHNICAL CHANGES 3 2 PART NAMES AND FUNCTIONS...

Page 128: ...ed 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 Revision D Specification has been corrected Capacity Capacity Rated Maximum Power consumption Power consumption Rated Maximum Revision E MUZ GE09NAH MUZ GE12NAH MUZ GE15NAH and MUZ GE18...

Page 129: ... changed MUZ GE09NA MUZ GE09NAH 1 Defrost heater has been added 2 Reactor has been changed 3 Inverter P C board has been changed MUZ GE12NA MUZ GE12NAH MUZ GE15NA 1 MUZ GE15NAH MUZ GE18NA 1 MUZ GE18NAH 1 Defrost heater has been added 2 Inverter P C board has been changed MUZ GE09NA MUZ GE09NA2 MUZ GE12NA MUZ GE12NA2 MUZ GE15NA 1 MUZ GE15NA2 MUZ GE09NAH MUZ GE09NAH2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE1...

Page 130: ...MUZ GE09NAH2 MUZ GE12NAH2 MUZ GE15NAH2 MUY GE09NA MUY GE12NA MUY GE15NA MUY GE09NA2 MUY GE12NA2 MUY GE15NA2 Air outlet Drain outlet Piping Drain hose Air inlet back and side MUZ GE18NA MUZ GE18NAH MUY GE18NA Air inlet back and side Piping Air outlet Drain hose Drain outlet 2 PART NAMES AND FUNCTIONS OBH549G ...

Page 131: ...5 MUZ GE24NA MUY GE24NA Piping Air outlet Drain outlet Air inlet back and side Drain hose OBH549G ...

Page 132: ...eating 1 4 20 3 61 Power supply V phase Hz 208 230 1 60 Max fuse size time delay A 15 Min circuit ampacity A 12 Fan motor F L A 0 50 Compressor Model KNB073FQDHC KNB092FQAHC R L A 6 6 4 9 6 6 4 9 L R A 8 2 6 1 8 2 6 1 Refrigeration oil Model L 0 32 NEO22 Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 46 49 Heating dB A 50 51 Defrost method Reverse cycle Dimensions W in 31 1 ...

Page 133: ... Max fuse size time delay A 15 Min circuit ampacity A 12 14 Fan motor F L A 0 50 0 93 Compressor Model MUZ MUY GE NA SNB130FQBH MUZ MUY GE NA2 MUZ MUY GE NA 1 MUZ GE NAH NAH2 SNB130FQBHT R L A 7 4 6 8 10 0 L R A 9 3 8 5 12 5 Refrigeration oil Model L 0 45 NEO22 Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 49 54 Heating dB A 51 56 Defrost method Reverse cycle Dimensions W i...

Page 134: ...16 1 Refrigeration oil Model L 0 40 FV50S Refrigerant control Linear expansion valve Sound level 1 Cooling dB A 55 Heating dB A 55 Defrost method Reverse cycle Dimensions W in 33 1 16 D in 13 H in 34 5 8 Weight Ib 119 External finish Munsell 3Y 7 8 1 1 Remote controller Wireless type Control voltage by built in transformer VDC 12 24 Refrigerant piping Not supplied Refrigerant pipe size Min wall th...

Page 135: ...peed 70 60 17 15 H0 1 Heating Steady State at minimum compressor Speed 70 60 62 56 5 H1 1 Heating Steady State at minimum compressor Speed 70 60 47 43 H2 V Heating at Intermediate compressor Speed 5 70 60 35 33 5 At Intermediate compressor Speed Cooling rated compressor speed minimum compressor speed 3 minimum compressor speed 3 4 2 OPERATION Mode Condition Intake air temperature F Indoor Outdoor ...

Page 136: ... 32 2 5 7 8 2 23 32 1 3 4 15 3 4 12 12 3 4 13 9 16 11 16 1 9 16 7 8 21 5 8 11 1 32 13 32 31 1 2 19 11 16 5 15 16 11 29 32 17 32 29 32 11 1 4 Air in handle Air in Air out 2 3 8 13 16 Oval hole Drain hole ø1 5 8 GE09 12 15NA NA2 Drain hole ø1 5 16 GE09 12 15NAH NAH2 REQUIRED SPACE 14 in or more 8 in or more 2 4 in or more 4 in or more 1 4 in or more when front and sides of the unit are clear 2 When ...

Page 137: ...6 slot 1 11 32 1 9 16 Drain 3 holes ø1 5 16 GE18NA 3 0 3 5 2 9 16 Liquid 1 4 flared Gas 1 2 flared 3 9 16 8 11 32 4 in or more REQUIRED SPACE 14 in or more 4 in or more 1 20 in more when front and sides of the unit are clear 2 When any 2 sides of left right and rear of the unit are clear Clear 1 20 in or more 2 Drain hole ø1 5 16 GE18NAH Unit inch OBH549G ...

Page 138: ... 16 3 5 4 4 Liquid refrigerant pipe joint Refrigerant pipe flared Ø 3 8 Gas refrigerant pipe joint Refrigerant pipe flared Ø 5 8 14 in or more 4 in or more REQUIRED SPACE 4 in or more 20 in or more 2 1 20 in or more when front and sides of the unit are clear 2 When any 2 sides of left right and rear of the unit are clear Clear 1 Unit inch MUZ GE24NA MUY GE24NA OBH549G ...

Page 139: ...13 MUZ GE09NA MUZ GE12NA 5 WIRING DIAGRAM MUZ GE09NA2 MUZ GE12NA2 OBH549G ...

Page 140: ...14 MUZ GE09NAH MUZ GE12NAH MUZ GE09NAH2 MUZ GE12NAH2 OBH549G ...

Page 141: ...15 MUY GE09NA MUY GE12NA MUY GE09NA2 MUY GE12NA2 OBH549G ...

Page 142: ...16 MUZ GE15NA 1 MUZ GE15NA OBH549G ...

Page 143: ...17 MUZ GE15NAH MUZ GE15NA2 OBH549G ...

Page 144: ...18 MUY GE15NA MUZ GE15NAH2 OBH549G ...

Page 145: ...19 MUY GE15NA 1 MUY GE15NA2 OBH549G ...

Page 146: ...20 MUZ GE18NA MUZ GE18NA 1 OBH549G ...

Page 147: ...21 MUZ GE18NAH MUY GE18NA OBH549G ...

Page 148: ...22 MUY GE18NA 1 OBH549G ...

Page 149: ...23 MUZ GE24NA OBH549G ...

Page 150: ...24 MUY GE24NA OBH549G ...

Page 151: ...uffler MUZ GE12NA MUZ GE12NA2 MUZ GE15NA MUZ GE15NA2 MUZ GE12NAH MUZ GE12NAH2 MUZ GE15NAH MUZ GE15NAH2 MUY GE12NA MUY GE12NA2 MUY GE15NA MUY GE15NA2 Outdoor heat exchanger Flared connection Defrost thermistor RT61 MUZ Discharge temperature thermistor RT62 Flared connection Stop valve with strainar Stop valve with service port Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in h...

Page 152: ... temperature thermistor RT68 Ambient temperature thermistor RT65 Strainer 100 Service port Service port Unit inch MUZ GE24NA MUY GE24NA Service port Service port Outdoor heat exchanger Flared connection Defrost thermistor RT61 MUZ Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve with service port Capillary tube O D 0 157 I D 0 094 3 15 16 ø4 0 ø2 4 100 Refrigerant flow...

Page 153: ...NA NA2 MUZ GE09NAH NAH2 MUY GE09NA NA2 1 lb 12 oz 0 1 62 4 86 8 10 11 34 12 96 MUZ GE12NA NA2 MUZ GE12NAH NAH2 MUY GE12NA NA2 2 lb 9 oz MUZ GE15NA NA2 MUZ GE15NAH NAH2 MUY GE15NA NA2 Calculation X oz 1 62 5 oz ft Refrigerant piping length ft 25 Model Outdoor unit precharged Refrigerant piping length one way ft 25 30 40 50 60 70 80 90 100 MUZ GE18NA MUZ GE18NAH MUY GE18NA 3 lb 7 oz 0 1 08 3 24 5 40...

Page 154: ...0 0 14 2 1 38 18 6 13 2 1 52 17 2 12 2 1 64 16 0 11 4 1 74 14 7 10 4 1 82 63 18 7 15 8 1 31 17 4 14 7 1 45 16 2 13 6 1 57 14 7 12 4 1 67 13 4 11 3 1 74 MUZ GE24NA MUY GE24NA 71 27 6 17 0 1 60 25 8 15 9 1 76 24 2 14 9 1 89 22 5 13 9 1 99 20 7 12 8 2 07 67 26 1 19 6 1 51 24 3 18 2 1 67 22 5 16 9 1 80 20 9 15 7 1 91 19 2 14 4 2 00 63 24 5 21 7 1 44 22 7 20 1 1 59 21 2 18 7 1 72 19 2 17 0 1 84 17 6 15...

Page 155: ...0 4 0 92 13 1 1 06 15 6 1 03 17 6 1 09 18 1 1 10 20 5 1 14 70 8 6 0 73 11 1 0 89 13 5 1 04 15 9 1 01 18 0 1 06 18 5 1 08 21 0 1 12 65 9 0 0 70 11 3 0 86 14 1 1 00 16 5 0 98 18 5 1 03 19 1 1 05 21 4 1 10 MUZ GE18NA 75 9 1 0 64 11 9 0 81 14 9 0 95 17 8 1 06 20 1 1 12 20 7 1 13 23 5 1 18 70 9 8 0 62 12 7 0 78 15 5 0 93 18 2 1 04 20 6 1 09 21 2 1 11 24 0 1 16 65 10 3 0 59 13 0 0 75 16 2 0 90 18 8 1 01...

Page 156: ...r WB temperature F Indoor air Wet bulb temperature difference F MUZ GE24NA MUY GE24NA 71 67 63 65 75 85 95 105 115 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 Indoor intake air WB temperature F SHF at rating condition 0 75 634 CFM Airflow Outdoor intake air DB temperature F Total power consumption kW MUZ GE15NA MUZ GE15NAH MUY GE15NA 71 67 63 1 4 1 3 1 2 1 1 1 0 0 9 0 8 Indoor intake air WB temperatur...

Page 157: ...UZ GE12NAH2 75 70 65 0 10 20 30 40 50 60 70 0 4 0 6 0 8 1 0 1 2 1 4 Indoor intake air DB temperature F 413 CFM Airflow Outdoor intake air WB temperature F Total power consumption kW MUZ GE15NAH MUZ GE15NAH2 75 70 65 0 10 20 30 40 50 60 70 0 5 0 8 1 1 1 4 1 7 2 0 Indoor intake air DB temperature F 463 CFM Airflow Outdoor intake air WB temperature F Total power consumption kW 75 70 65 0 10 20 30 40 ...

Page 158: ...ndoor DB temperature F Outdoor ambient temperature Indoor DB temperature F 86 80 75 70 MUZ GE18NA MUZ GE24NA 75 70 65 0 10 20 30 40 50 60 70 1 0 1 4 1 8 2 2 2 6 3 0 Indoor intake air DB temperature F 738 CFM Airflow Outdoor intake air WB temperature F Total power consumption kW MUZ GE18NAH 75 70 65 0 10 20 30 40 50 60 70 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 Indoor intake air DB temperature F 512 CF...

Page 159: ... 6870 75 80 85 90 95 100 105 F 280 320 360 400 440 Condensing pressure 86 80 75 70 Suction pressure Outdoor ambient temperature Indoor DB temperature F Outdoor ambient temperature Indoor DB temperature F 86 80 75 70 MUZ GE18NA MUZ GE18NAH MUY GE18NA PSIG 6870 75 80 85 90 95 100 105 F 270 310 350 390 430 PSIG 6870 75 80 85 90 95 100 105 F 100 115 130 145 160 Condensing pressure 86 80 75 70 Suction ...

Page 160: ...bient temperature 5 15 25 35 45 55 65 75 F 5 15 25 35 45 55 65 75 F 60 85 110 135 160 185 210 220 245 270 295 320 345 370 Indoor DB temperature F Condensing pressure Outdoor ambient temperature PSIG PSIG 75 70 65 58Hz Indoor DB temperature F Suction pressure Outdoor ambient temperature 75 70 65 58Hz Heating MUZ Data is based on the condition of outdoor humidity 75 Air flow should be set to High sp...

Page 161: ... temperature F Suction pressure Outdoor ambient temperature 75 70 65 58Hz MUZ GE15NA MUZ GE15NAH 5 15 25 35 45 55 65 75 F 5 15 25 35 45 55 65 75 F 60 85 110 135 160 185 210 260 296 332 368 404 440 Indoor DB temperature F Condensing pressure Outdoor ambient temperature PSIG PSIG 75 70 65 54Hz Indoor DB temperature F Suction pressure Outdoor ambient temperature 75 70 65 54Hz MUZ GE12NA2 MUZ GE12NAH2...

Page 162: ...IG 75 70 65 58Hz Indoor DB tem perature F Suction pressure Outdoor ambient temperature 75 70 65 58Hz MUZ GE24NA 5 15 25 35 45 55 65 75 F 75 F 250 275 300 325 350 375 400 425 450 5 15 25 35 45 55 65 50 70 90 110 130 150 170 190 210 Indoor DB temperature F Condensing pressure Outdoor ambient temperature PSIG PSIG 75 70 65 58Hz Indoor DB tem perature F Suction pressure Outdoor ambient temperature 75 ...

Page 163: ...GE12NA MUZ GE12NA2 MUZ GE12NAH MUZ GE12NAH2 Power supply V phase Hz 208 230 1 60 Input kW 0 638 0 737 0 938 1 147 Comp current A 3 32 3 00 3 66 3 31 4 39 3 97 5 41 4 89 Fan motor current A 0 27 0 24 0 30 0 27 0 34 0 31 0 31 0 28 Refrigerant circuit Condensing pressure PSIG 389 331 389 397 Suction pressure PSIG 151 103 133 104 Discharge temperature F 154 152 163 162 Condensing temperature F 115 103...

Page 164: ...NAH Power supply V phase Hz 208 230 1 60 Input kW 1 035 1 569 1 595 1 860 Comp current A 4 86 4 40 7 38 6 67 6 97 6 29 8 36 7 55 Fan motor current A 0 33 0 30 0 34 0 31 0 80 0 72 0 64 0 59 Refrigerant circuit Condensing pressure PSIG 400 431 376 458 Suction pressure PSIG 139 99 117 102 Discharge temperature F 164 179 177 184 Condensing temperature F 117 122 112 127 Suction temperature F 57 31 59 3...

Page 165: ...Comp current A 7 01 6 34 9 59 8 67 Fan motor current A 1 61 1 05 1 13 1 02 Refrigerant circuit Condensing pressure PSIG 395 405 Suction pressure PSIG 141 102 Discharge temperature F 158 171 Condensing temperature F 115 Suction temperature F 52 33 Comp shell bottom temp F 140 148 Ref pipe length ft 25 Refrigerant charge R410A 4 lb 3 oz Indoor unit Intake air temperature DB F 80 70 WB F 67 60 Discha...

Page 166: ...E09NAH MUZ GE12NA MUZ GE12NAH MUZ GE09NA2 MUZ GE09NAH2 MUZ GE12NA2 MUZ GE12NAH2 0 50 100 150 0 5 1 0 1 5 2 0 0 50 100 150 0 5 1 0 1 5 0 50 100 150 0 5 1 0 2 0 1 5 Capacity correction factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operational frequency ...

Page 167: ...requency of compressor var ies 6 To cancel test run operation EMERGENCY OPERATION press EMERGENCY OPERATION switch or any button on remote controller MUZ GE24NA MUY GE24NA Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operational frequency of compressor Correction of Heating total input The operational frequ...

Page 168: ... 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running ON OFF Compressor Outdoor fan motor R V coil ON OFF ON OFF COOL 5 seconds HEAT 5 seconds 8 3 RELATION BETWEEN MAIN SENSOR AND ACTUATOR Sensor Purpose Actuator Compressor LEV Outdoor fan motor R V coil MUZ Indoor fan motor Discharge temperature thermistor Protection Indoor coil...

Page 169: ...ents this interference The pre heat control turns ON when the discharge temperature thermistor is 68 F 20 C or below When pre heat control turns ON compressor is energized About 50 W Pre heat control setting JK ON To activate the pre heat control cut the JK wire of the inverter P C board Refer to 10 6 1 OFF To deactivate the pre heat control solder JK wire of the inverter P C board Refer to 10 6 1...

Page 170: ...ply stress on the components 5 When connecting or disconnecting the connectors hold the connector housing DO NOT pull the lead wires 3 Troubleshooting procedure 1 Check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality To make sure check how many times the OPERATION INDICATOR lamp is flashing ON and OFF before starting service work 2 Before servic...

Page 171: ...s the upper lamp of OPERATION INDICA TOR lamp stay ON for 3 seconds When it stays ON for 3 seconds without beep The outdoor unit is abnormal The indoor unit is abnormal Check the blinking pattern and identify the abnormal point by referring to indoor unit failure mode table Refer to indoor unit service manual Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode ...

Page 172: ...ck the blinking pattern and identify the abnormal point by referring to outdoor unit failure mode table 10 2 3 Make sure to check at least two consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller Repair the failure parts...

Page 173: ...tart if discharge temperature thermistor reads 212 F 100 C or less 3 minutes later Check refrigerant circuit and refrigerant amount Refer to 10 5 Check of LEV 6 time flash 2 5 seconds OFF High pressure Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode MUZ only Temperature of outdoor heat exchanger temperature thermistor exceeds 158 F 70 C in COOL mode Check refrigerant circuit ...

Page 174: ...elligent power module IPM power module IPM 1 The open phase operation of compressor is detected The interphase short circuit occurs in the output of the intelligent power module IPM power module IPM 1 The compressor winding shorts circuit Reconnect compressor connector Refer to 10 5 How to check inverter compressor 14 time flash 2 5 seconds OFF Stop valve Closed valve 14 time flash 2 5 seconds OFF...

Page 175: ...heat sink ex ceeds 167 176 F 75 80 C or temperature of P C board tem perature thermistor on the inverter P C board exceeds 158 167 F 70 75 C Check around outdoor unit Check outdoor unit air passage Refer to 10 5 Check of outdoor fan motor 11 5 time flash 2 5 seconds OFF High pressure pro tection Temperature of indoor coil thermistor exceeds 158 F 70 C in HEAT mode MUZ only Temperature of outdoor h...

Page 176: ...ing frequency shows the number of times the LED blinks after every 2 5 second OFF Flashing Example When the flashing frequency is 2 ON OFF 2 5 second OFF 2 5 second OFF 0 5 second ON 0 5 second ON LED Flashing LED MUZ GE24NA MUY GE24NA MUZ GE09 12 15 NA NA2 NAH NAH2 MUY GE09 12 15 NA NA2 MUZ 18NA NAH MUY 18NA Inverter P C board Parts side 10 4 TROUBLE CRITERION OF MAIN PARTS MUZ GE09NA MUZ GE12NA ...

Page 177: ...LEV Measure the resistance using a tester Temperature 14 104 F 10 40 C MUZ GE09 12 15 18NA MUZ GE09 12 15NA2 MUZ GE09 12 15 18NAH MUZ GE09 12 15NAH2 MUY GE09 12 15 18NA MUY GE09 12 15NA2 Color of lead wire Normal Ω WHT RED 37 54 RED ORN YLW BRN BRN BLU LEV WHT RED ORN YLW BRN BLU Measure the resistance using a tester Temperature 14 104 F 10 40 C MUZ GE24NA MUY GE24NA Color of lead wire Normal Ω RE...

Page 178: ...peration by pressing EMERGENCY OPERATION switch on the indoor unit TEST RUN OPERA TION Refer to 7 6 Measurement point at 3 points BLK U WHT V BLK U RED W WHT V RED W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this check LED of the inverter P C board flashes 9 times Refer to 10 6 1 Measure AC voltage between the lead wires at ...

Page 179: ... of inverter P C board and balance of them See 10 5 3 Direct current voltage between DB61 and MUZ GE09 12 1518 MUY GE09 12 1518 JP715 and JP30 MUZ GE24 MUY GE24 on the inverter P C board 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 Connect the compressor and activate the inverter The...

Page 180: ...ve Refer to 10 4 In case CN721 MUZ GE09 12 15 18 CN602 MUZ GE24 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 MUZ GE09 12 15 18 CN602 MUZ GE24 is connected Is there 208 230 VAC between CN721 MUZ GE09 12 15 18 CN602 MUZ GE24 and on the inverter P C board 3 minutes after the power...

Page 181: ...l of outdoor fan motor normal Refer to 10 4 Disconnect the connectors CN931 and CN932 from the inverter P C board Check the connec tion between the connector CN931 and CN932 Disconnect CN932 from the inverter P C board and turn on the power supply Rotate the outdoor fan motor manually and measure the voltage of CN931 Between 1 and 5 Between 2 and 5 Between 3 and 5 Does the voltage between each ter...

Page 182: ...Solder side DB61 260 325 VDC MUZ GE09 12 15NA NA2 NAH NAH2 MUZ GE18NA NAH MUY GE09 12 15NA NA2 MUY GE18NA MUZ GE24NA MUY GE24NA Is there voltage 208 230 VAC between the indoor terminal block S1 and S2 No Yes Replace the indoor electronic control P C board Rectify indoor outdoor connecting wire Yes If LED lights up it is OK If LED flashes refer to 10 3 Does the upper lamp of OPERATION INDICATOR on ...

Page 183: ...erly fix the LEV coil to the expansion valve Replace the inverter P C board Replace the LEV coil Replace the expansion valve Is LEV coil properly fixed to the expansion valve Does the resistance of LEV coil have the characteristics Refer to 10 4 Do you hear the expansion valve click click Do you feel the expansion valve vibrate on touching it Turn ON the power supply Preparation of the remote cont...

Page 184: ...931 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 flash 10 times Replace the inverter P C board Check the remedy following LED indication Refer to 10 3 Yes No Yes 10 time flash No Only for MUZ GE24NA MUY GE24NA OBH549G ...

Page 185: ... Correct them No A Turn OFF the power supply Check once more if the indoor outdoor connecting wire is not miswiring Bridge the outdoor terminal block S2 and S3 1 B 1 Miswiring may damage indoor electronic control P C board during the operation Be sure to confirm the wiring is correct before the opera tion starts Turn ON the power supply Does the LED on the inverter P C board repeat 3 6 second OFF ...

Page 186: ...h or the installation condition combination of specific conditions such as antennas or wiring 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 Layout of indo...

Page 187: ... MUY GE12NA MUY GE15NA MUY GE09NA2 MUY GE12NA2 MUY GE15NA2 10 6 TEST POINT DIAGRAM AND VOLTAGE Back side of unit Fin temperature thermistor RT64 CN642 Ambient temperature thermistor RT65 CN643 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN641 MUZ LEV connector CN724 Bus bar voltage DB61 260 325 VDC Front side of unit 208 230 VAC Smoothing capacitor C62 Output to drive compr...

Page 188: ... temperature thermistor RT64 CN642 Ambient temperature thermistor RT65 CN643 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN641 MUZ LEV connector CN724 Bus bar voltage DB61 260 325 VDC Front side of unit 208 230 VAC Smoothing capacitor C62 Output to drive compressor LDU LDV LDW Fuse F701 T3 15AL250V Smoothing capacitor C61 Smoothing capacitor C63 Fuse F801 T3 15AL250V Fuse F...

Page 189: ...86 104 122 140 158 176 194 212 230 248 MUZ GE24NA MUY GE24NA Fin temperature thermistor RT64 CN673 Ambient temperature thermistor RT65 CN672 Discharge temperature thermistor RT62 CN671 Defrost thermistor RT61 CN671 MUZ Output to drive outdoor fan motor CN932 Outdoor heat exchanger temperature thermistor RT68 CN671 Fuse F901 T3 15AL250V Fuse F880 T3 15AL250V LEV connector CN724 Jumper wire for chan...

Page 190: ...64 Screws of the conduit cover Conduit plate Conduit cover 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Terminal with locking mechanism Detaching points The terminal which h...

Page 191: ...e 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 3 Removing R V coil MUZ 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 Remove the R V coil 65 ...

Page 192: ...m its holder 5 Removing outdoor fan motor 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 CN932 Fan motor 3 Remove the propeller nut 4 Remove the propeller 5 Remove the screws fixing the fan motor 6 Remove the fan motor 6 Removing the compressor and 4 way valve 1 Remove the cabinet and panels Refer to 1 2 Remove the inverter assembly Refer ...

Page 193: ...l 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Photo 1 Photo 2 67 Screws of the cabinet Screws of the back panel Screw of the top panel Screws of the cabinet Screws of the cabinet Screw of the valve cover Screw ...

Page 194: ...crew of the ground wire and screw of the terminal 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 3 Photo 4 Inverter assembly 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil MUZ...

Page 195: ...or 1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly...

Page 196: ...the valve cover 9 Disconnect the power supply and indoor outdoor con necting wire 10 Remove the screws of the cabinet 11 Remove the cabinet 12 Remove the screws of the back panel 13 Remove the back panel Photo 2 Photo 1 Photo 3 70 Screws of the top panel Screws of the back panel Screws of the service panel Screws of the back panel Screws of the cabinet Screws of the back panel Screws of the back p...

Page 197: ...e compressor connector 4 Remove the screws fixing the relay panel 5 Remove the relay panel 6 Remove the ground wires and the lead wires of the inverter P C board 7 Remove the screw of the PB support 8 Remove the inverter P C board from the relay panel Photo 4 3 Removing R V coil 1 Remove the cabinet and panels Refer to 1 2 Disconnect the following connector Inverter P C board CN602 R V coil MUZ 3 ...

Page 198: ...1 Remove the top panel cabinet and service panel Refer to 1 2 Disconnect the following connectors Inverter P C board CN931 and CN932 Fan motor 3 Remove the propeller 4 Remove the screws fixing the fan motor 5 Remove the fan motor 6 Removing the compressor and 4 way valve 1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Remove the inverter assembly Re...

Page 199: ...73 OBH549G ...

Page 200: ...uted in Apr 2011 No OBH 549 REVISED EDITION D Distributed in Apr 2011 No OBH 549 REVISED EDITION C Distributed in Dec 2010 No OBH 549 REVISED EDITION B Distributed in Sep 2010 No OBH 549 REVISED EDITION A 5 Distributed in Jul 2009 No OBH 549 5 Made in Japan New publication effective Jan 2015 Specifications are subject to change without notice HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKY...

Page 201: ...n shown or comments made remain subject to the requirements of the Drawings and Specifications The contractor is responsible for quantities required and dimensions which shall be confirmed at the job site fabrication processes means and methods techniques sequences assembly and procedures of construction coordination of the work with that of other trades and performance of the work in a safe and s...

Page 202: ...NOTED C REVISE AND RESUBMIT D REJECTED RESUBMIT PLEASE SIGN AND INDICATE THE ACTION ON THIS SUBMITTAL FORM AND FORWARD WITH THE SUBMITTAL TO SAMPSON CONSTRUCTION THANKS COMMENTS ARCHITECT DATE CONSULTANT DATE CONTRACTOR Sampson Construction Company BY DATE _________________________________________ ___________________ 238127 2 0 9 4 2014 9 4 2014 9 4 2014 9 4 2014 13011 Kelly Walsh High School RB B...

Page 203: ...chanical Date Submitted 8 27 14 Division 23 HVAC Section 238127 Small Split System Cooling A Small Split System Cooling Re Submittal Page 2 11 Model B Page Model C Page Model D Page Model E Page Model F Page Model G Page Model H Page Model I Page Model Comments Contractor Design Team DAC 1 2 6 DAC 2 Thru 7 7 12 09 04 2014 tim farber ...

Page 204: ..._______________Submittal___________________________________ Job Kelly Walsh High School Contractor North Star HVAC Section 238127 Small Split System Cooling _______________________________________________________________________________________ ...

Page 205: ...eal horizontal air distribution Self check function onboard diagnostics Advanced microprocessor control Auto restart following a power outage Hand held Wireless Remote Controller Anti allergy Enzyme Filter Limited warranty five years parts and seven years compressors ACCESSORIES Outdoor Unit Drain Socket Assembly MAC 811DS Indoor Unit Condensate Pump 230V SI3100 230 Controller Options Wireless Wal...

Page 206: ...SPECIFICATIONS MSZ D36NA 8 MUZ D36NA 1 Cooling Rated Capacity 33 200 Btu h Minimum Capacity 9 800 Btu h SEER 14 5 Btu h W Total Input 4 360 W Heating at 47 F Rated Capacity 35 200 Btu h Minimum Capacity 8 700 Btu h HSPF 8 2 Btu h W Total Input 3 840 W Heating at 17 F Rated Capacity 21 800 Btu h Maximum Capacity 22 800 Btu h Maximum Total Input 3 000 W ELECTRICAL REQUIREMENTS Power Supply 208 230V ...

Page 207: ...Inc 1340 Satellite Boulevard Suwanee GA 30024 Tele 678 376 2900 Fax 800 889 9904 Toll Free 800 433 4822 www mehvac com For left left back or left bottom piping using spacer 5 1 8 or more FORM MSZ D36NA 8 MUZ D36NA 1 201311 DIMENSIONS MSZ D36NA 8 MUZ D36NA 1 MSZ D36NA 8 MUZ D36NA 1 ...

Page 208: ...es MAC 333IF System Control Interface MAC 333IF Remote Temperature Sensor M21 JKO 307 Lockdown Bracket for Hand held Controller RCMKP1CB Outdoor Unit Base Heater MAC 642BH U Three pole Disconnect Switch TAZ MS303 Air Outlet Guide MAC 886 SG E Mounting Base DSD 400N Mounting Pad ULTRILITE1 Drain Socket Assembly MAC 860DS ACCESSORIES Wireless Remote Controller GENERAL FEATURES Wall mounted indoor un...

Page 209: ...9 628 738 Dry CFM 347 420 562 661 Wet CFM Heating 388 469 628 738 Dry CFM Sound Pressure Level Quiet Lo Med Hi Super Hi Cooling 34 41 49 53 dB A Heating 32 41 49 52 dB A DIMENSIONS UNIT INCHES MM W 43 5 16 1 116 D 9 3 8 238 H 12 13 16 325 Weight 37 lbs 17 kg Moisture Removal 2 7 pt h External Finish Munsell No 1 0Y 9 2 0 2 Field Drainpipe Size O D 5 8 15 88 mm Outdoor Unit Compressor DC Inverter d...

Page 210: ...ele 678 376 2900 Fax 800 889 9904 Toll Free 800 433 4822 www mehvac com Specifications are subject to change without notice 2013 Mitsubishi Electric US Inc FORM MSZ GE24NA MUZ GE24NA 201311 DIMENSIONS MSZ GE24NA MUZ GE24NA MSZ GE24NA MUZ GE24NA ...

Page 211: ...ars parts and seven years compressor ACCESSORIES Outdoor Unit Outdoor Mounting Pad ULTRILITE1 Drain Pan Heater MAC 640BH U 3 1 4 Mounting Base Pair DSD 400P Drain Pan Socket MAC 860DS Air Outlet Guide MAC 889SG Wall Mounting Bracket CWMB1 Indoor Unit BlueDiamond MaxiBlue Condensate Pump X87 721 230V Sauermann Condensate Pump SI30 230 230V Anit Allergy Enzyme Filter MAC 408FT E Platinum Catalyst De...

Page 212: ...18 000 Btu h Capacity Range 4 800 20 900 Btu h Rated Total Input 1 600 W Maximum Total Input 2 010 W HSPF 11 2 Btu h W Heating at 17 F 3 Rated Capacity 11 300 Btu h Max Capacity 15 900 Btu h Rated Total Input 1 150 W Maximum Total Input 1 950 W Heating at 5 F Maximum Capacity 13 022 Btu h Rating Conditons 1 Cooling Indoor 80º F 27º C DB 67º F 19º C WB 1 Cooling Outdoor 95º F 35º C DB 75º F 24º C W...

Page 213: ... Specifications are subject to change without notice 2014 Mitsubishi Electric US Inc 2 When any 2 sides of left right and rear of the unit are clear 1 4 in or more when front and sides of the unit are clear Clea r 1 2 FORM MSZ GE15NA 8 MUZ GE15NA2 201403 DIMENSIONS MSZ GE15NA 8 MUZ GE15NA 1 MSZ GE15NA 8 MUZ GE15NA2 ...

Page 214: ...eekly Timer On Off times can be set up to 4 times per day of the week in 15 minute increments Choice of 5 2 and 5 1 1 weekly schedules for heat cool auto separate for each mode Auto off Timer Turns indoor unit Off at scheduled time up to 24 hours in advance Room Temperature Displays room temperature sensed either at the indoor unit or at the remote controller default Set temperature range limits d...

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