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Mitsubishi Electric MS09NW Service Manual

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SPLIT-TYPE AIR CONDITIONERS
SERVICE MANUAL
Wireless type
Models
MS09NW
(W)
MS12NN
(W)
MS15NN
(W)
MS17NN
(W)
MS09NW2
(W)
MS12NN2
(W)
MS15NN2
(W)
MS17NN2
(W)
MS12NN MS12NN2
MS15NN MS15NN2
MS17NN MS17NN2
INDOOR UNIT
MU12NN MU12NN2
MU15NN MU15NN2
MU17NN MU17NN2
OUTDOOR UNIT
Refer to our Service Manual OB202 when the
indoor unit is used in the multi-system operation.
Applied models are MS09NW and MS15NN.
·
MU09NW
·
MU12NN
·
MU15NN
·
MU17NN
·
MU09NW2
·
MU12NN2
·
MU15NN2
·
MU17NN2
Remote
controller
Revision:
● MS09NW2, MS12NN2, MS15NN2 and
MS17NN2 has been added.
● Parts List has been partially modified.
● Please void OB192 REVISED EDITION -A.
MUM30NN
MUM30NN2
CONTENTS
1. FEATURES ························································2
2. TECHNICAL CHANGES ····································4
3. PART NAMES AND FUNCTIONS ······················5
4. SPECIFICATIONS ··············································7
5. DATA ································································12
6. OUTLINES AND DIMENSIONS ······················23
7. WIRING DIAGRAM ··········································26
8. REFRIGERANT SYSTEM DIAGRAM ··············32
9. MICROPROCESSOR CONTROL ····················35
10. SERVICE FUNCTIONS ····································43
11. TROUBLESHOOTING ······································44
12. DISASSEMBLY INSTRUCTIONS ····················59
13. PARTS LIST······················································70
14. OPTIONAL PARTS ··········································79
The Slim Line.
From Mitsubishi Electric.
R
No. OB192
REVISED EDITION -B

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Summary of Contents for Mitsubishi Electric MS09NW

  • Page 1: Table Of Contents

    MU12NN MU12NN2 14. OPTIONAL PARTS ··········································79 MU15NN MU15NN2 MU17NN MU17NN2 The Slim Line. OUTDOOR UNIT From Mitsubishi Electric. Refer to our Service Manual OB202 when the indoor unit is used in the multi-system operation. Applied models are MS09NW and MS15NN.

  • Page 2: Features

    It has a liquid crystal display which indicates such information as mode, fan speed and temperature selected as well as the programmed ON/OFF time. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric feature that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that describes present conditions : “Too Cool”...
  • Page 3 Operation resumes in the mode in which the equipment was running immediately before the outage. HIGH PERFORMANCE ROTARY COMPRESSOR The advanced design of Mitsubishi Electric’s powerful and energy efficient rotary compressor results in lower operating costs and longer service life. MSM30NN MSM30NN2 This “3 to 1”...

  • Page 4: Technical Changes

    TECHNICAL CHANGES MS09EW ➔ MS09NW 1. Indoor unit has been changed. (Outline dimension changes. 31-1/8” o 5-3/8” o 14-3/16”(W o D o H)➔32-1/16” o 7-3/16” o 10-13/16(W o D o H) 2. Outdoor unit has been changed. (Outline dimension changes. 29-15/16” o 9-1/16” o 21-1/4”(W o D o H)➔30-11/16” o 10-1/16” o 21-1/4”(W o D o H)) (Capillary tube, refrigerant and pipe had changed.)

  • Page 5: Part Names And Functions

    PART NAMES AND FUNCTIONS INDOOR UNIT MS09NW MS09NW2 MS12NN MS12NN2 MS15NN MS15NN2 MS17NN MS17NN2 Operation section (When the front panel is opened) MS09NW MS09NW2 MS09NW MS09NW2 Emergency operation switch MS12NN MS12NN2 MS12NN MS12NN2 MS15NN MS15NN2 MS15NN MS15NN2 MS17NN MS17NN2 MS17NN...
  • Page 6 MUM30NN MUM30NN2 OUTDOOR UNIT MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 REMOTE CONTROLLER REMOTE CONTROLLER Signal transmitting Signal transmitting section section Operation display Operation display section section OPERATE/STOP OPERATE/STOP (ON/OFF)button (ON/OFF)button ON/OFF WARM COOL OPERATION OPERATION TEMPERATURE TEMPERATURE SELECT button...

  • Page 7: Specifications

    SPECIFICATIONS When MS09NW indoor unit is operating with MUM18NW, MUM30NN and MUM30NN2 outdoor unit connected. (Please refer to the manual No.OB202 for MUM18NW.) MS09NW MS09NW2 MS12NN MS12NN2 ITEM MODELS Cooling capacity Btu/h 8,500 12,300/12,600 Power consumption 1,100/1,130 EER [SEER] 10.1 (10.2) 11.2/11.2 (11.3/11.3)
  • Page 8 When MS15NN indoor unit is operating with MUM30NN and MUM30NN2 outdoor unit connected. (Please refer to the manual No.OB202 for MUM18NW.) MS15NN MS15NN2 MS17NN MS17NN2 Item Model Cooling capacity Btu/h 14,300/14,600 15,900/16,100 Power consumption 1,370/1,400 1,570/1,600 EER [SEER] 10.4/10.4 (10.5/10.5) 10.1/10.1 (10.2/10.2) INDOOR UNIT MODEL MS15NN...
  • Page 9 W 2,060 Power consumption 2,990 1,860 1,220 EER (Triple unit operation) 10.0 SEER (Triple unit operation) INDOOR UNIT MODEL MS09NW MS09NW MS15NN Extenal finish White Power Supply V, Hz, Phase 115,60,1 Max. fuse size (time delay) 15.0 Min. ampacity Fan motor F.L.A...
  • Page 10 8,200 12,400 Power consumption 2,870 1,830 1,260 2,060 EER (Triple unit operation) SEER (Triple unit operation) 10.0 INDOOR UNIT MODEL MS09NW MS09NW MS15NN Extenal finish White Power Supply V, Hz, Phase 115,60,1 Max. fuse size (time delay) 15.0 Min. ampacity Fan motor F.L.A...
  • Page 11 Piping size O.D. : in. Length of connecting pipe : in. Models Max. length : ft Liquid Indoor unit Outdoor unit [ 3/8 MS09NW MS09NW2 [ 1/4 16-15/16 MS12NN MS12NN2 [ 5/8 MS15NN MS15NN2 MS17NN MS17NN2 MAX. HEIGHT DIFFERENCE Indoor...

  • Page 12: Data

    DATA 1. PERFORMANCE DATA 1) COOLING CAPACITY MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 Outdoor intake air DB temperature ( ˚F ) Indoor air Model ( ˚F ) 10.4 0.75 0.82 0.88 0.93 0.97 MS09NW 0.71 0.78 0.84 0.89 0.93...
  • Page 13 2. PERFORMANCE CURVE NOTE : A point on the curve shows the reference point. MS09NW MS09NW2 MS12NN MS12NN2 MU09NW MU09NW2 MU12NN MU12NN2 Cooling capacity Cooling capacity SHF at rating condition = 0.7 SHF at rating condition = 0.71 = 279CFM...
  • Page 14 MSM30NN MSM30NN2 (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT) NOTE : A point on the curve shows the reference point. MS09NW Cooling capacity Cooling capacity MS15NN SHF at rating condition = 0.71 SHF at rating condition = 0.72 MUM30NN MUM30NN...
  • Page 15 3. CONDENSING PRESSURE AND SUCTION PRESSURE Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. A point on the curve shows the reference point MU09NW MU09NW2 PSIG 86 F PSIG 86 F 68 70 104 F 68 70...
  • Page 16 Data is based on the condition of indoor humidity 50%. Air flow should be set at Hi. A point on the curve shows the reference point MU15NN MU15NN2 PSIG 86 F PSIG 86 F 68 70 104 F 68 70 104 F Outdoor ambient temperature Outdoor ambient temperature...
  • Page 17 MSM30NN (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT) Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. MS09NW MS15NN MUM30NN MUM30NN PSIG PSIG...
  • Page 18 MSM30NN2 (ONE INDOOR UNIT WITH ONE OUTDOOR UNIT) Data is based on the condition of indoor humidity 50%. Air flow should be set at HI. A point on the curve shows the reference point. MS09NW MS15NN MUM30NN2 MUM30NN2 PSIG PSIG...
  • Page 19 4. STANDARD OPERATION DATA MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 Model MS09NW MS09NW2 MS12NN MS12NN2 MS15NN MS15NN2 MS17NN MS17NN2 Item Unit Cooling Cooling Cooling Cooling Capacity Btu / h 8,500 12,300/12,600 14,300/14,600 15,900/16,100 Total — 0.71 0.65 0.65 Input 0.84...
  • Page 20 0.72 0.71 0.72 0.72 0.71 0.71 0.72 Input 2.99 1.86 2.06 0.99 1.22 Indoor unit model MS09NW MS09NW MS15NN MS09NW MS09NW MS09NW MS15NN MS09NW MS15NN Power supply (V,Hz,{) 115,60,1 115,60,1 115,60,1 Input 0.035 0.035 0.047 0.035 0.035 0.035 0.047 0.035 0.047...
  • Page 21 0.72 0.71 0.72 0.72 0.71 0.71 0.72 Input 2.87 1.83 2.06 0.99 1.26 Indoor unit model MS09NW MS09NW MS15NN MS09NW MS09NW MS09NW MS15NN MS09NW MS15NN Power supply (V,Hz,{) 115,60,1 115,60,1 115,60,1 Input 0.035 0.035 0.047 0.035 0.035 0.035 0.047 0.035 0.047...
  • Page 22 5. OPERATING RANGE (1) POWER SUPPLY Rating Guaranteed Voltage Models MS09NW MS09NN2 MS12NN MS12NN2 Indoor unit MS15NN MS15NN2 115V 60Hz 1[ Min. 103V — Max. 127V MS17NN MS17NN2 MU09NW MU09NW2 MU12NN MU12NN2 Outdoor unit Min. 198V 208V 230V Max. 253V...

  • Page 23: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit : inch MS09NW MS09NW2 8-7/8 8-7/8 3-5/16 5-1/4 INDOOR UNIT 30-13/16 3-11/16 12-11/16 12-3/8 3-5/16 2-9/16 7-3/16 3/16 32-1/16 1/4-19-11/16 3/8-16-15/16 1-3/8 O.D. 3/4 I.D 2-3/8 24-5/8 5-1/8 2-13/16 3-9/16 1-1/8 11/16 2-3/16 MU09NW MU09NW2 OUTDOOR UNIT...
  • Page 24 MS12NN MS15NN MS17NN MS12NN2 MS15NN2 MS17NN2 Unit : inch 7/16 ✕ 13/16 INDOOR UNIT 5-7/8 8-9/16 25-1/2 39-3/16 17-11/16 17-11/16 13-7/8 17-1/4 2-15/16 7-1/2 3/16 39-15/16 Installation plate 5/16-19-11/16 1/2-16-15/16 1-15/16 O.D. 1-1/8 I.D. 7-1/2 1-15/16 30-1/2 11/16 2-3/16 1-1/8 Wireless remote controller MU12NN MU15NN MU17NN MU12NN2 MU15NN2 MU17NN2 OUTDOOR UNIT...
  • Page 25 MODEL : MUM30NN MUM30NN2 Unit : inch OUTDOOR UNIT Min.4in. Min.4in. Min.12in. Min.33in. Min.36in. Space for servicing wining and piping 4-{7/16 18-3/4 Installation anchor hole 3-3/16 Air intake Air intake Drainage hole Air outlet 25-5/8 2-{1 5-15/16 5-15/16 handle for moving Earth terminal NOTE: Do not wire 12V DC and 115V AC...

  • Page 26: Wiring Diagram

    WIRING DIAGRAM MS09NW MODEL WIRING DIAGRAM INDOOR UNIT CN202 SR11 TO OUTDOOR RT12 UNIT HIC1 CONNECTING RT11 WIRES 12V DC CN201 NR11 POWER SUPPLY 115V TRANS 1 phase 60Hz TAB12 LD101 CN211 ELECTRONIC CONTROL P.C BOARD GROUND POWER MONITOR, RECEIVER P.C.BOARD...
  • Page 27 MS12NN MS15NN MS17NN MODELS WIRING DIAGRAM INDOOR UNIT 2 - TB TO OUTDOOR CN201 RT12 UNIT CONNECTING RT11 HIC1 WIRES 12V DC LDCOM TAB12 POWER LDC11 SUPPLY NR11 LDC12 115V LDFH 1 phase SR144 TRANS 60Hz LDFL SR142 LDFM SR143 CN202 GRN/YLW GRN/YLW...
  • Page 28 MS09NW2 MODEL WIRING DIAGRAM INDOOR UNIT CN202 SR11 TO OUTDOOR RT12 UNIT HIC1 CONNECTING RT11 WIRES 12V DC CN201 FROM OUTDOOR NR11 UNIT CONNECTING TRANS WIRES POWER SUPPLY TAB12 115V 1 phase CN211 LD101T 60Hz ELECTRONIC CONTROL P.C. BOARD POWER MONITOR, RECEIVER P.C.BOARD REMOTE...
  • Page 29 MS12NN2 MS15NN2 MS17NN2 MODELS WIRING DIAGRAM INDOOR UNIT TO OUTDOOR CN201 RT12 UNIT CONNECTING HIC1 HIC1 RT11 WIRES 12V DC LDCOM TO OUTDOOR TAB12 LDC11 UNIT LDC12 CONNECTING WIRES LDFH SR144 POWER TRANS LDFL SUPPLY SR142 LDFM 115V SR143 1 phase CN202 60Hz ELECTRONIC CONTROL P.C BOARD...
  • Page 30 MUM30NN OUTDOOR UNIT 52C3 51C3 COM WHT 2 51C1 52C1 POWER SUPPLY 208/230V 1phase 3wires 52C2 51C2 COM WHT 2 60Hz GROUND INDOOR 52C1 UNIT (09A) FROM INDOOR UNIT (09A) CONNECTING WIRES 12V DC INDOOR 52C2 UNIT (09B) FROM INDOOR UNIT(09B) CONNECTING WIRES 12V DC INDOOR...
  • Page 31 MUM30NN2 OUTDOOR UNIT 52C3 51C3 52C1 51C1 POWER SUPPLY 208/230V 1phase 3wires 52C2 60Hz 2 51C2 1 GROUND INDOOR 52C1 (09A) UNIT FROM INDOOR UNIT (09A) CONNECTING WIRES 12V DC INDOOR 52C2 (09B) UNIT FROM INDOOR UNIT (09B) CONNECTING WIRES 12V DC INDOOR 52C3...

  • Page 32: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM Unit:inch MU09NW MU09NW2 MS09NW MS09NW2 INDOOR UNIT OUTDOOR UNIT Refrigerant pipe (option) (with heat insulator) Stop valve with service port Fusible plug Indoor heat Outdoor heat Indoor coil Flared Service Service exchanger thermistor exchanger connection port port...
  • Page 33 Unit : inch MS09NW O 2 M S 1 5 N N O 1 MUM30NN Refrigerant pipe [3/8 INDOOR UNIT OUTDOOR UNIT (Option) (with heat insulator) MS09NW Service Ball valve port Service Fusible Flared port plug connection Compressor Indoor coil...
  • Page 34 Unit : inch MS09NW O 2 M S 1 5 N N O 1 MUM30NN2 INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [3/8 (Option) (with heat insulator) MS09NW Service Ball valve port Service Fusible Flared port plug connection Compressor Indoor coil...

  • Page 35: Microprocessor Control

    MICROPROCESSOR CONTROL MS09NW MS09NW2 MS12NN MS12NN2 MS15NN MS15NN2 MS17NN MS17NN2 Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns off, 3-minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes.
  • Page 36 9-1. “I FEEL CONTROL” OPERATION Initial room temperature mode (1) Press OPERATE/STOP button on the remote controller. Operation indicator lamp of the indoor unit will turn on COOL mode of more than 77-F “I FEEL CONTROL” with a beep tone. (2) Press OPERATION SELECT button to set “I FEEL DRY mode of 55-F to 77-F...
  • Page 37 (5) TEMPERATURES buttons In “I FEEL CONTROL” mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Each time the TOO WARM or TOO COOL button is pressed,the indoor unit receives the signal and emits a beep tone.
  • Page 38 —DRY mode of “I FEEL CONTROL”— The system for dry operation uses the same refrigerant circuit as the cooling circuit. The compressor and the indoor fan are controlled by the temperature. By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.
  • Page 39 These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor.) VANE VANE (2) The horizontal vane angle and mode changes as follows by pressing the VANE CONTROL ( ) button. <MS09NW, MS12/15/17NN> <MS09NW2, MS12/15/17NN2>...
  • Page 40 During COOL or DRY operation at vane Angle 4 or 5 when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention. (7) SWING MODE <MS09NW, MS12/15/17NN> SWING By pressing the SWING ( ) button the horizontal vane swings vertically.
  • Page 41 9-7. TIMER OPERATION <MS09NW, MS12/15/17NN> 1. How to set the timer. (1) Press OPERATE/STOP(ON/OFF) button to start the air conditioner. (2) Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially “AM0:00” blinks at the current time display of TIMER MONITOR, so set the current time correctly with CLOCK SET button.
  • Page 42 The coil frost prevention circuit operates in this mode. In the test run or Emergency operation, auto vane operates in AUTO mode with the set temperature 75°F. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation. MS09NW MS09NW2 Press once <Cool>...

  • Page 43: Service Functions

    SERVICE FUNCTIONS MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 10-1. AUTO RESTART FUNCTION When the indoor unit is operated with the remote controller, the signals of the operation mode, the set temperature, and the fan speed are sent from the indoor electronic control P.C. board and memorized in the auto restart assembly.

  • Page 44: Troubleshooting

    TROUBLESHOOTING MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 11-1. Cautions on troubleshooting 1. Before troubleshooting, check the followings: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the followings during servicing.
  • Page 45 11-2 Instruction of troubleshooting Start Indoor unit oper- Operation monitor lamp on Indoor unit Indoor unit doesn’t ates. Outdoor unit <MS12/15/17> the indoor unit is flashing doesn’t receive the signal When the doesn’t operate. on and off. receive the from remote con- remote controller signal from troller.
  • Page 46 MS09NW MS12NN MS15NN MS17NN MS09NW2 MS12NN2 MS15NN2 MS17NN2 11-2-2 Trouble criterion of main parts Part name Check method and criterion Figure Room Measure the resistance with a tester. temperature (Part temperature 50°F ~ 86°F) thermistor Normal Abnormal Indoor coil Opened or short-circuit 8k"...
  • Page 47 MUM30NN, MUM30NN2 11-2-3 Trouble criterion of main parts Part name Check method and criterion Figure Measure the resistance between the terminals with a tester. (Coil wiring temperature 14-F ~ 104-F) MUM30NN Normal (KH122WEV) Abnormal Normal (RH167NAB) 0.8~1.1' Opened or 2.1~2.7' Compressor short-circuited 4.8~5.2'...
  • Page 48 Replace Auto Restart The unit receives signal of Operate Assembly. ON/OFF with remote controller, and emits a beep tone. MS09NW product number after 7004651T, and MS09NW2 Replace Electric control The unit receives signal of Operate ON/OFF with remote controller, P.C. board.
  • Page 49 Check of indoor electronic control P.C. board The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. Replace fuse. Is fuse(F11)blown? Trouble of indoor electronic con- Check both “parts side”and “pat- trol P.C.
  • Page 50 (2) Compressor and outdoor fan do not operate.(Only indoor fan operates.) MUM30NN MUM30NN2 Start Press Emergency operation switch. 3-minute time delay works. Test mode operates for 30 minutes. Is there 230V AC to terminal block between Turn on outdoor power supply. Check voltage to contactor 52C.
  • Page 51 (4) Only outdoor fan does not operate.(Compressor operates.) MUM30NN MUM30NN2 Start Press Emergency operation switch. 3-minute time delay works. Test mode operates for 30 minutes. MUM30NN2 Measure resistance to H.P.switch. Check power supply voltage on P.C. board. ' (open) Is resistance 0' (short) or Is there 230V AC between TAB 61and TAB62 ? (see page 47) MUM30NN...
  • Page 52 TEST POINT DIAGRAM AND VOLTAGE MS09NW MS09NW2 Indoor electronic control P.C. board TAB 12 Power supply input 115V AC CN201 No.1 Fan motor power supply Varistor(NR11) Fuse 250V AC 3.0A Room temperature thermistor (RT11) Indoor coil thermistor (RT12) EMERGENCY OPERATION switch...
  • Page 53 TEST POINT DIAGRAM AND VOLTAGE MS12NN MS15NN MS17NN MS12NN2 MS15NN2 MS17NN2 Indoor electronic control P.C. board Fan motor power supply Me Lo 8 7 5 6 4 Varistor(NR11) Fuse 250V AC 3.0A CN201 Power supply input 115V AC 12V DC JP11 5V DC JP24...
  • Page 54 TEST POINT DIAGRAM AND VOLTAGE MUM30NN Outdoor electronic control P.C. board 10~17V DC while 52C is ON. 0V DC while 52C is OFF <Comp-control signal input> 52C Signal 52C Signal 52C Signal A UNIT B UNIT C UNIT + -- + -- + -- POWER TRANS FORMER...
  • Page 55 TEST POINT DIAGRAM AND VOLTAGE MUM30NN2 Outdoor electronic control P.C. board 10~17V DC while 52C is ON. 0V DC while 52C is OFF <Comp-control signal input> 52C Signal 52C Signal 52C Signal A UNIT B UNIT C UNIT + -- + -- + -- POWER TRANS FORMER...
  • Page 56 RELAY OPERATION MS09NW MS09NW2 MS12NN MS12NN2 MS15NN MS15NN2 MS17NN MS17NN2 MODE THERMOSTAT 52C CONTACTOR INDOOR FAN RELAY COOL & COOL mode AUTO or set speed of I FEEL CONTROL OFF for 2 min. AUTO or set speed after unit starts operation Repeats 8 min.
  • Page 57 MUM30NN 52C CONTACTOR SYSTEM OUTDOOR FAN RELAY Triple All three : ON X61 is ON Double Two of them : ON X62 is ON Single One of them : ON X63 is ON OPERATION OF 52C1, 52C2, 52C3, X61, X62, X63, X64 NOTE 1 : Compressor is on while 52C is on.
  • Page 58 MUM30NN2 SYSTEM 52C CONTACTOR OUTDOOR FAN RELAY Triple All three : ON X61 is ON Double Two of them : ON X62 is ON Single One of them : ON X63 is ON OPERATION OF 52C1, 52C2, 52C3, X61, X62, X63 NOTE 1 : Compressor is on while 52C is on.

  • Page 59: Disassembly Instructions

    2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 12-1 MS09NW MS09NW2 INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel (1) Remove the screw caps at the down of the front panel. Front panel Photo 1 Remove the screws.
  • Page 60 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Photo 3 (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector(CN211 and CN121) and the vane motor connector(CN151) on the electronic control P.C.
  • Page 61 12-2 MS12NN, MS15NN, MS17NN INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps at the down of the front panel. Remove the screws. Front panel (2) Pull the panel down to your side slightly and unhook the catches at the top.
  • Page 62 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Screw (1) Remove the front panel.(Refer to 1) Photo 3 (2) Remove the electrical cover. (3) Remove the connector of the indoor coil thermistor. (4) Remove the motor connector and the vane motor connec- tor (CN151) on the electronic control P.C.
  • Page 63 12-3 MU09NW MU09NW2 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the top panel. (2) Remove the screw of the service panel. (3) Remove the screws of the cabinet. (4) Remove the service panel, and remove the screw from the insides.
  • Page 64 OPERATING PROCEDURE PHOTOS 3. Removing the compressor Photo 4 (1) Remove the lead clamps. (2) Remove the screws fixing the relay panel. (3) Remove the screw fixing the service port. Terminal cover Discharge pipe (4) Remove the terminal cover. (5) Pull out the lead from the compressor terminal. (6) Remove the overcurrent relay.
  • Page 65 12-4 MU12NN MU15NN MU17NN MU12NN2 MU15NN2 MU17NN2 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on the both side to remove the cabinet. Screws Service panel...
  • Page 66 OPERATING PROCEDURE PHOTOS Clamp 3. Removing the outdoor fan motor Photo 4 Connector (1) Remove the cabinet. (Refer to 1) (2) Disconnect the connector and remove the clamp of fan motor lead wire. (3) Remove the propeller nut and remove the propeller fan. (4) Remove screws securing the fan motor.
  • Page 67 12-5 MUM30NN MUM30NN2 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Photo 1 1. Removing of the cabinet (1)Remove the set screws of the valve cover to remove Screws the valve cover as shown in Photo 2. (2)Remove the set screws of the side panel to remove the side panel and cabinet.
  • Page 68 OPERATING PROCEDURE PHOTOS Photo 4 Set screws of the relay panel 3. Removing the outdoor fan motor. (1) Remove the cabinet. (Refer to 1) (2) Remove the propeller. (Refer to 2) (3) Disconnect the connector remove the clamp of outdoor fan motor lead wire. (4) Remove the screws fixing the outdoor fan motor.
  • Page 69 OPERATING PROCEDURE PHOTOS Photo 6 4. Removing the compressor Set nuts of the terminal cover (1)Disconnect the cord connector. (See Phot 5) (2)Remove the set screws of the relay panel. (3)Remove the set nuts of the terminal cover. (4)Pull up the compressor. (5)Pull out the lead wires from the compressor terminal to remove overcurrent relay.

  • Page 70: Parts List

    PARTS LIST MS09NW (W) MS09NW2 (W) 13-1. INDOOR UNIT STRUCTURAL PARTS 13-2. ACCESSORY AND REMOTE CONTROLLER OPTIONAL PARTS This figure shows about MS09NW2. 13-1. INDOOR UNIT STRUCTURAL PARTS Q'ty / set Symbol Remarks Parts No. Parts Name in Wiring MS09NW MS09NW2 (Drawing No.)
  • Page 71 MS09NW (W) MS09NW2 (W) 13-4. INDOOR UNIT HEAT EXCHANGER 13-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 10 15 W AUTO RESTART ASSEMBLY has been deleted from the parts list. Auto restart function can work only ELECTRONIC CONTROL P.C. BOARD.
  • Page 72 13-5. OUTDOOR UNIT STRUCTURAL PARTS, FUNCTIONAL PARTS AND ELECTRICAL PARTS MU09NW MU09NW2 ● Shows the change of parts number. Part numbers that are circled are not shown in the illustration. Q'ty / set Symbol Remarks Parts No. Parts Name in Wiring (Drawing No.) MU09NW MU09NW2...
  • Page 73 MS12NN (W) MS12NN2 (W) MS15NN (W) MS15NN2 (W) MS17NN (W) MS17NN2 (W) 13-7. ACCESSORY AND 13-6. INDOOR UNIT STRUCTURAL PARTS REMOTE CONTROLLER OPTIONAL PARTS This figure shows about MS12/15/17NN2. Part number that is circled is not shown in the illustration. 13-6.
  • Page 74 MS12NN (W) MS12NN2 (W) MS15NN (W) MS15NN2 (W) MS17NN (W) MS17NN2 (W) 13-9. INDOOR UNIT HEAT 13-8. INDOOR UNIT ELECTRICAL PARTS EXCHANGER PARTS ● Shows the change of parts number. Part numbers that are circled are not shown in the illustration. 13-8.
  • Page 75 MU12NN MU12NN2 MU15NN MU15NN2 MU17NN MU17NN2 13-10. OUTDOOR UNIT STRUCTURAL PARTS ● Shows the change of parts number. Part numbers that are circled are not shown in the illustration. Q'ty / set Symbol Remarks in Wiring Parts No. Parts Name MU12 MU12 MU15...
  • Page 76 13-11. OUTDOOR UNIT STRUCTURAL PARTS MUM30NN MUM30NN2 Refer to MS09NW,MS15NN for indoor unit. NOTE : When you order FRONT PANEL (R01 539 668), order LABEL (T2W E46 001) at the same time. Symbol in ty/unit Skeleton Parts No. Parts Name...
  • Page 77 13-12. OUTDOOR UNIT STRUCTURAL PARTS MUM30NN MUM30NN2 Refer to MS09NW,MS15NN for indoor unit. ● Shows the change of parts number. Part number that is circled is not shown in the illustration. Symbol in ty/unit Skeleton Parts No. Parts Name Remarks...
  • Page 78 13-18. OUTDOOR UNIT ELECTRICAL PARTS MUM30NN MUM30NN2 ● Shows the change of parts number. Symbol in ty/unit Skeleton Parts No. Parts Name Remarks Wiring MUM30NN MUM30NN2 Diagram T2W 738 353 MC1. MC2. CAPACITOR C1,C2 35+ 330V ● T2W 903 353 MC1.

  • Page 79: Optional Parts

    A-Gas B-Liquid Insulation charge section R-22(Oz) 10ft MAC - 440PI 16ft C 13/16 MAC - 441PI MS09NW, MS09NW2 D 1-1/16 23ft MAC - 442PI 33ft MAC - 443PI 10ft MAC - 670PI MS12NN, MS12NN2 16ft MAC - 671PI C 1-7/32...
  • Page 80 HEAD OFFICE MITSUBISHI DENKI BLDG.MARUNOUCHI TOKYO100-8310 TELEX J24532 CABLE MELCO TOKYO CCopyright 1997 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD. New publication, effective Mar. 2000. Issued in Mar. 2000 NO. OB192 REVISED EDITION -B 6026 Specifications subject to change without notice. Issued in Dec. 1997 NO. OB192 REVISED EDITION -A 7143 Issued in May.

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