Mitsubishi MCFH-13NV Service Manual
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Mitsubishi MCFH-13NV Service Manual

Floor and ceiling type
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FLOOR AND CEILING TYPE AIR CONDITIONERS

SERVICE MANUAL

Wireless type
Models
MCFH-13NV-
MCFH-18NV-
MCFH-24NV-
(When installed on the floor)
(When installed on the ceiling)
This Service manual OB212 deals with MCFH-13/18/24/NV-E1,
MUCFH-13/18/24/NV-E1, MCFH-13/18/24/NV-E2 and MUCFH-
13/18/24/NV-E2 in OB196 REVISED EDITION A issued in
September in 1997.
Therefore, please refer to OB212, not to OB196 REVISED EDI-
TION A, for the above models.
·MUCFH-13NV-
(WH)
E4
·MUCFH-18NV-
(WH)
E3
·MUCFH-24NV-
(WH)
E3
CONTENTS
1. TECHNICAL CHANGES ····································3
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································6
4. NOISE CRITERIA CURVES ·······························7
5. OUTLINES AND DIMENSIONS ·························8
6. WIRING DIAGRAM ············································9
7. REFRIGERANT SYSTEM DIAGRAM ··············14
8. PERFORMANCE CURVES ······························16
9. MICROPROCESSOR CONTROL ····················32
10. SERVICE FUNCTIONS·····································41
11. TROUBLESHOOTING ······································42
12. DISASSEMBLY INSTRUCTIONS·····················55
13. PARTS LIST······················································63
14. OPTIONAL PARTS···········································70
W As for parts lists, all sub number's series are included.
No. OB267
E4
E3
E3

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Summary of Contents for Mitsubishi MCFH-13NV

  • Page 1: Table Of Contents

    September in 1997. Therefore, please refer to OB212, not to OB196 REVISED EDI- TION A, for the above models. FLOOR AND CEILING TYPE AIR CONDITIONERS No. OB267 SERVICE MANUAL Wireless type Models MCFH-13NV- ·MUCFH-13NV- (WH) MCFH-18NV- ·MUCFH-18NV- (WH) MCFH-24NV- ·MUCFH-24NV-...

  • Page 3: Technical Changes

    SWING button is removed, but SWING MODE function is available by VANE CONTROL button. 2. Ball valve has changed to stop valve. 3. Deicer P.C. board has changed. PART NAMES AND FUNCTIONS MCFH-13NV - MCFH-18NV - MCFH-24NV - ACCESSORIES Item...
  • Page 4 OUTDOOR UNIT MUCFH-13NV - Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MUCFH-18NV - Air inlet Piping Drain hose Air outlet Drain outlet MUCFH-24NV - Air outlet Air inlet...

  • Page 5: Remote Controller

    MCFH-13NV - MCFH-18NV - MCFH-24NV - REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. CLOCK ON/OFF WARM COOL FAN SPEED CONTROL button VANE CONTROL button STOP I FEEL COOL...

  • Page 6: Specification

    SPECIFICATION MCFH-13NV- MCFH-18NV- MCFH-24NV- Indoor model Cooling Heating Cooling Heating Cooling Heating Function Single phase Power supply 220 - 240 V, 50Hz Capacity Air flow(High) K /h Dehumidification Power outlet 6.2 - 6.4 5.4 - 5.8 9.3 - 9.0 5.4 - 5.8 12.5 - 11.7...

  • Page 7: Noise Criteria Curves

    NOISE CRITERIA CURVES MCFH-13NV - MUCFH-13NV - SPL(dB LINE SPEED SPL(dB LINE SPEED High 46-47 49-49 High Test conditions, Test conditions, Cooling : DB 27: WB 19:\ Cooling : DB 35: WB (24:) Heating : DB 20: WB 15: Heating : DB 7: WB 6:...

  • Page 8: Outlines And Dimensions

    4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz OUTLINES AND DIMENSIONS MCFH-13NV - Unit: mm MCFH-18NV - MCFH-24NV - INDOOR UNIT 80.8 112.8 (When installed on the floor) 50cm or more 50cm or more...
  • Page 9 Unit: mm MUCFH-13NV - REQUIRED SPACE OUTDOOR UNIT Air in Outdoor unit Air in Drainage 3holes [33 Airout Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7 MUCFH-18NV - OUTDOOR UNIT If the right/left sides or back side is vacant,the Drainage...
  • Page 10 MUCFH-24NV - Unit: mm Outdoor Unit-Necessary surrounding clearance Air intake Note:Allow adequate upper clearance Front opening Air intake Air outlet Service space Terminal block for indoor and outdoor unit connection Outlet guide Service panel installation hole Handle for moving Handle for moving Refrigerant-pipe flared connection [15.88 Refrigerant-pipe flared...

  • Page 11: Wiring Diagram

    WIRING DIAGRAM MODEL MCFH-13NV- INDOOR UNIT CIRCUIT BREAKER GRN/YLW RT12 HIC1 LDCOM POWER SUPPLY LDC11 ~/N 220-240V LDC12 50Hz LDFH SR144 TRANS GRN/YLW CN201 LDFM SR143 LDFL SR142 LDFVL SR141 TO OUTDOOR 220-240V~ UNIT GRN/YLW ELECTRONIC CONTROL P.C BOARD CONNECTING...
  • Page 12 MODEL MCFH-18NV- INDOOR UNIT CIRCUIT BREAKER GRN/YLW RT12 HIC1 LDCOM POWER SUPPLY LDC11 ~/N 220-240V LDC12 50Hz LDFH SR144 TRANS GRN/YLW CN201 LDFM SR143 LDFL N BLU SR142 LDFVL TO OUTDOOR SR141 UNIT 220-240V~ GRN/YLW ELECTRONIC CONTROL P.C BOARD CONNECTING 12VDC DISP/ SW/THERMO...
  • Page 13 INDOOR UNIT MODEL MCFH-24NV- CIRCUIT BREAKER GRN/YLW RT12 HIC1 LDCOM POWER SUPPLY LDC11 ~/N 220-240V LDC12 50Hz LDFH SR144 CN201 GRN/YLW TRANS LDFM SR143 LDFL SR142 LDFVL TO OUTDOOR SR141 UNIT 220-240V~ ELECTRONIC CONTROL P.C BOARD GRN/YLW CONNECTING 12VDC DISP/ SW/THERMO REMOTE AUTO RESTART...

  • Page 14: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MCFH-13NV- MUCFH-13NV- INDOOR UNIT OUTDOOR UNIT 4-way valve Refrigerant pipe [12.7 (with heat insulator) Muffler Stop valve Indoor (with service port) heat Outdoor Distributor Flared connection exchanger heat Strainer exchanger Coil temperature thermistor RT12 Compressor Defrost thermistor...
  • Page 15 MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Piping size O.D. : mm Refrigerant piping MAX. length :mm Models Liquid {12.7 MCFH-13NV - {6.35 MCFH-18NV - {15.88 {9.52 MCFH-24NV - wIt does not matter which unit is higher. A: Refrigerant piping Max.length 15m...

  • Page 16: Performance Curves

    PERFORMANCE CURVES The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition. Operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 17 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation 1 Both indoor and outdoor units are under the same temperature/humidity condition. Dry Bulb temperature ( Relative humidity ( ˚C 2 Air flow should be set at MAX.. 3 The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below.
  • Page 18 HEAT operation Condition Indoor : Dry bulb temerature 20.0: Outdoor : Dry bulb temerature 7,15,20: Wet bulb temerature 14.5: Wet bulb temerature 6,12,14.5: MUCFH-13NV- MUCFH-18NV- 220V 240V 240V 220V 25(:) 25(:) Ambient temperature (:) Ambient temperature (:) Ambient humidity (%) Ambient humidity (%) MUCFH-24NV- 220V...
  • Page 19 PERFORMANCE DATA COOL operation(220V) MCFH-13NV - : MUCFH-13NV - CAPACITY :3.7(KW) SHF :0.72 INPUT :1310(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.35 2.35 0.54 1048 4.16 2.25 0.54 1100 4.00 2.16 0.54...
  • Page 20 PERFORMANCE DATA COOL operation(220V) MCFH-13NV - : MUCFH-13NV - CAPACITY :3.7(KW) SHF :0.72 INPUT :1310(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.63 1.96 0.54 1284 3.33 1.80 0.54 1362 3.20 1.73 0.54...
  • Page 21 PERFORMANCE DATA COOL operation(240V) MCFH-13NV - : MUCFH-13NV - CAPACITY :3.7(KW) SHF :0.72 INPUT :1400(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.35 2.35 0.54 1120 4.16 2.25 0.54 1176 4.00 2.16 0.54...
  • Page 22 PERFORMANCE DATA COOL operation(240V) MCFH-13NV - : MUCFH-13NV - CAPACITY :3.7(KW) SHF :0.72 INPUT :1400(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.63 1.96 0.54 1372 3.33 1.80 0.54 1456 3.20 1.73 0.54...
  • Page 23 PERFORMANCE DATA COOL operation(220V) MCFH-18NV - : MUCFH-18NV - CAPACITY :5.0(KW) SHF :0.64 INPUT :2030(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.88 2.70 0.46 1624 5.63 2.59 0.46 1705 5.40 2.48 0.46 1786...
  • Page 24 PERFORMANCE DATA COOL operation(220V) MCFH-18NV - : MUCFH-18NV - CAPACITY :5.0(KW) SHF :0.64 INPUT :2030(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.90 2.25 0.46 1989 4.50 2.07 0.46 2111 4.33 1.99 0.46 2152...
  • Page 25 PERFORMANCE DATA COOL operation(240V) MCFH-18NV - : MUCFH-18NV - CAPACITY :5.0(KW) SHF :0.64 INPUT :2120(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.88 2.70 0.46 1696 5.63 2.59 0.46 1781 5.40 2.48 0.46 1866...
  • Page 26 PERFORMANCE DATA COOL operation(240V) MCFH-18NV - : MUCFH-18NV - CAPACITY :5.0(KW) SHF :0.64 INPUT :2120(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.90 2.25 0.46 2078 4.50 2.07 0.46 2205 4.33 1.99 0.46 2247...
  • Page 27 PERFORMANCE DATA COOL operation(220V) MCFH-24NV - : MUCFH-24NV - CAPACITY :6.0(KW) SHF :0.64 INPUT :2720(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 7.05 3.24 0.46 2176 6.75 3.11 0.46 2285 6.48 2.98 0.46 2394...
  • Page 28 PERFORMANCE DATA COOL operation(220V) MCFH-24NV - : MUCFH-24NV - CAPACITY :6.0(KW) SHF :0.64 INPUT :2720(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.88 2.70 0.46 2666 5.40 2.48 0.46 2829 5.19 2.39 0.46 2883...
  • Page 29 PERFORMANCE DATA COOL operation(240V) MCFH-24NV - : MUCFH-24NV - CAPACITY :6.0(KW) SHF :0.64 INPUT :2750(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 7.05 3.24 0.46 2200 6.75 3.11 0.46 2310 6.48 2.98 0.46 2420...
  • Page 30 PERFORMANCE DATA COOL operation(240V) MCFH-24NV - : MUCFH-24NV - CAPACITY :6.0(KW) SHF :0.64 INPUT :2750(W) OUTDOOR DB(:) INDOOR INDOOR DB(:) WB(:) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 5.88 2.70 0.46 2695 5.40 2.48 0.46 2860 5.19 2.39 0.46 2915...
  • Page 31 PERFORMANCE DATA HEAT operation(220V) MCFH-13NV - : MUCFH-13NV - CAPACITY :4.0(KW) INPUT :1130(W) OUTDOOR WB(:) INDOOR DB(:) INPUT INPUT INPUT INPUT INPUT INPUT INPUT 2.52 3.04 3.56 4.08 1074 4.60 1141 5.08 1175 5.60 1198 2.40 2.88 3.40 1040 3.88 1119 4.40...

  • Page 32: Microprocessor Control

    MICROPROCESSOR CONTROL MCFH-13NV - MCFH-18NV - MUCFH-13NV - MUCFH-24NV - MCFH-24NV - MUCFH-18NV - Once the operation mode are set, the same operation mode WIRELESS REMOTE CONTROLLER can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON. Signal transmitting section Indoor unit receives the signal with a beep tone.
  • Page 33 (4) The initial set temperature is decided by the initial room temperature. Initial room temperature Initial set temperature Model 26: or more COOL mode of "I FEEL CONTROL" Initial room temperature 25: to 26: minus 2: Initial room temperature DRY mode of 23: to 25: "I FEEL CONTROL"...
  • Page 34 Operation chart Example Compressor Outdoor fan (continuously at set speed) Indoor fan —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 room temperature. By such controls, indoor air flow amounts will be reduced in order to lower humidity without much room temperature decrease.
  • Page 35 — HEAT mode of “I FEEL CONTROL” — 1. Indoor fan speed control Difference between room (1) In AUTO the fan speed is as follows. temperature and set temperature during operation Initial temperature difference Fan speed Set temperature minus room temperature: 2 degrees or more ···························High Set temperature minus room temperature: Between 1 and 2 degrees ···············Med.
  • Page 36 3. Defrosting Defrosting of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT61. (1) Starting conditions of defrost When all conditions of a) ~ c) are satisfied, the defrosting operation starts. a) The compressor cumulative operation time exceeds 40 minutes without the defrosting operation working. b) The defrost thermistor RT61 reads - 3°C or less.
  • Page 37 4. 4-way valve control Heating · · · · · ON Cooling · · · · · OFF Dry · · · · · · · · OFF NOTE : The 4-way valve reverses for 5 seconds right before start-up of the compressor. (HEAT) (COOL / DRY) Ex.
  • Page 38 9-5. AUTO VANE OPERATION (1) Vane motor drive This model is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor. (2) Each time the VANE CONTROL button is pressed, angle of horizontal vane is changed in sequence, from 1, 2, 3, 4, 5 SWING to AUTO.

  • Page 39: Program Timer

    (8) Cold air prevention in HEAT operation. When any of the following conditions occurs in HEAT operation, the angle of horizontal vane automatically changes to Position 1 to prevent cold air blowing on users. 1 Compressor is not operating. 2 Defrosting is performed. 3 Indoor coil thermistor RT12 reads 24: or below.
  • Page 40 9-7. EMERGENCY-TEST OPERATION In case of test run operation or emergency operation, use the EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote controller run down.

  • Page 41: Service Functions

    SERVICE FUNCTIONS MCFH-13NV - MCFH-24NV - MUCFH-13NV - MUCFH-24NV - MCFH-18NV - MUCFH-18NV - 10-1. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JP607 and R853 (MUCFH-13/18NV) / JPG1 ans R871 (MUCFH-24NV) on the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction. (See Page 53 or 54.) Defrost thermistor RT61 must read below -3:.

  • Page 42: Troubleshooting

    TROUBLESHOOTING MCFH-13NV - MCFH-24NV - MUCFH-13NV - MUCFH-24NV - MCFH-18NV - MUCFH-18NV - 11-1. Cautions on troubleshooting 11-1-1. Before troubleshooting, check the followings: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for mis-wiring. 11-1-2. Take care the followings during servicing.
  • Page 43 11-2. Instruction of troubleshooting Start Indoor unit Indoor unit Indoor unit operates. OPERATION INDICATOR operates. doesn't receive Outdoor unit lamp on the indoor unit is Outdoor unit the signal from doesn't operate flashing on and off. doesn't remote controller. normally. operate.
  • Page 44 11-2-1. troubleshooting check table OPERATION INDICATOR lamp Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table Abnormal Indication Symptom Detect method Check point point 0.5-second ON When serial signal stops for 4 to 5 seconds after 1st on of Mis-wiring 52C contactor by POWER turning on.
  • Page 45 11-2-2. Trouble criterion of main parts MCFH-13NV - MCFH-18NV - MUCFH-13NV - MUCFH-18NV - MCFH-24NV - MUCFH-24NV - Part name Check method and criterion Figure Room Measure the resistance with a tester. temperature (Part temperature 10°C ~ 30°C) thermistor (RT11)
  • Page 46 Check of indoor fan motor Turn OFF power supply. Indoor fan does not operate. Check connector (Fan motor) visually. Are lead wires connected? Is soldered point normal? Reconnect the lead wires. Resolder it. Disconnect lead wires from connector (Fan motor). Measure resistance between lead wires No.1 and No.4 and then No.3 and No.4 of the fan motor.
  • Page 47 Is varistor(NR11)burnt? Replace the varistor. Check of outdoor unit Compressor and outdoor fan do not operate.(Only indoor fan operates.) MCFH-13NV - MCFH-18NV - Start Press EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes.
  • Page 48 Check of outdoor unit Compressor and outdoor fan do not operate.(Only indoor fan operates.) MCFH-24NV - Start Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes. Compressor doesn't operate.
  • Page 49 How to check mis-wiring and serial signal error (when outdoor unit does not work) Start w 1 Short circuit of JPG and JPS on the 1. Turn OFF power supply. electronic control P.C. board enables 2. Turn ON power supply. self-check to be displayed in 3 seconds.
  • Page 50 Check of outdoor unit Compressor and / or outdoor fan motor doesn’t stop. 1 Turn OFF the power supply. 2 After 30 seconds, turn ON the power supply again. 3 Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 4 Operate the unit for 1 minute or more and stop it by pressing the EMERGENCY OPERATION switch again.
  • Page 51 Check of outdoor thermistor Thermistors in the outdoor unit are abnormal. w Disconnect the connectors CN661 and/or CN662 from the deicer P.C. board. (Check the characteristics of each thermistor.) Defrost thermistor(RT61) Measure resistance between CN 661 1 and 2. Replace the deicer P.C. board.
  • Page 52 TEST POINT DIAGRAM AND VOLTAGE MCFH-13NV - MCFH-18NV - MCFH-24NV - Indoor electronic control P.C. board Fan motor power supply 220 - 240V AC (Refer to page 46.) Very Med. High Fuse (F11) 250V AC 3.15A Power supply input 220-240V AC 12V DC –...
  • Page 53 MUCFH-13NV - MUCFH-18NV - Outdoor deicer P.C. board R601 5~10V DC INPUT Outdoor fan motor R.V. coil 220-240V AC 220-240V AC 220-240V AC Defrost thermistor(RT61) DEICER P.C. BOARD Fuse (F61) 2A/250V Defrost interval time short pin (Refer to page 41) 5V DC DC12V Defrost interval...
  • Page 54 MUCFH-24NV - Outdoor deicer P.C. board Defrost thermistor (RT61) Ambient temperature thermistor (RT63) -20 -10 10 20 30 40 Temperature(:) CN661 1-2 CN662 3-4 Defrost ther- Ambient tempera- Fan motor mistor (RT61) ture thermistor connector Varistor (RT63) (NR62) (CN711) R.V. coil (CN721) Defrost interval...

  • Page 55: Disassembly Instructions

    1Slide the sleeve. Be sure to pull the wire by pushing the locking 2Pull the wire while pushing the locking lever. lever (project part) of the terminal with a finger. 12-1.MCFH-13NV- , MCFH-18NV- , MCFH-24NV- INDOOR UNIT OPERATING PROCEDURE PHOTOS 1.
  • Page 56 OPERATING PROCEDURE PHOTOS 3. Removing the indoor heat exchanger. Photo 5 (1) Remove the grill. (Refer to 1(1) (2)) (2) Remove the screws on both side and in front of the front panel. (Photo 5) (3) Remove the screws of the nozzle assembly. (Photo 6) (4) Remove the electronic box .
  • Page 57 12-2. MUCFH-13NV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 Screws of the front panel (1) Remove the screws of the top panel. and motor support (2) Remove the screws of the service panel. (3) Remove the screws of the cabinet. (4) Remove the screws of the front panel and motor support.
  • Page 58 OPERATING PROCEDURE PHOTOS 3. Removing the propeller fan and the outdoor fan Photo 5 motor Lead clamps Set screws of the (1) Remove the cabinet. (Refer to 1) outdoor fan motor Hook (2) Remove the propeller fan nut. Outdoor (3) Remove the propeller fan. fan motor Propeller fan NOTE : Loose the propeller fan in the rotating direction for...
  • Page 59 12-3. MUCFH-18NV - 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. Photo 2 Screws Service panel Screws 2.
  • Page 60 OPERATING PROCEDURE PHOTOS Photo 4 3. Removing the outdoor fan motor Set screws for (1) Remove the cabinet. (Refer to 1) outdoor fan motor Lead clamps propeller fan (2) Unconnect the connector remove the clamp of fan motor lead wire. (3) Remove the propeller nut and remove the propeller.
  • Page 61 12-4. MUCFH-24NV - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the electrical parts Photo 1 ( 1 ) Remove the 5 screws and the top panel. ( 3 screws in Screws front and 2 screws in rear ) ( 2 ) Remove the screw of the cover panel. To remove the Top panel cover panel, pull it toward you and unhook the catch- es from the side panel.
  • Page 62 OPERATING PROCEDURE PHOTOS 3. Removing the heat exchanger and the compressor Photo 4 ( 1 ) Remove the rear panel (2 screws in front, 1 screw on Screws the side, 3 screws in the rear). Remove the valve bed, and open the rear panel to the rear to remove. NOTE : All panels are fixed by catches, and must be removed by shifting up and down.

  • Page 63: Parts List

    PARTS LIST 13-1. INDOOR UNIT STRUCTURAL PARTS MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-18NV - (WH) MCFH-18NV - (WH) MCFH-18NV - (WH) MCFH-24NV - (WH) MCFH-24NV - (WH) MCFH-24NV - (WH) Part number that are circled is not shown in the illustration.

  • Page 64: Electrical Parts

    MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-13NV - (WH) MCFH-18NV - (WH) MCFH-18NV - (WH) MCFH-18NV - (WH) MCFH-24NV - (WH) MCFH-24NV - (WH) MCFH-24NV - (WH) 13-2. INDOOR UNIT 13-3. ACCESSORY AND ELECTRICAL PARTS REMOTE CONTROLLER PARTS...
  • Page 65 13-4. OUTDOOR UNIT STRUCTURAL PARTS MUCFH-13NV - MUCFH-13NV - Part numbers that are circled is not shown in the illustration. Q'ty/unit Symbol Remarks in Wiring Part No. Part name MUCFH- MUCFH- Diagram 13NV- 13NV- E02 442 630 OUTDOOR HEAT EXCHANGER E02 336 232 CABINET E02 336 521...
  • Page 66 MUCFH-13NV - MUCFH-13NV - 13-6. ACCESSORY PARTS 13-5. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 13-5. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring MUCFH- MUCFH- Part No.
  • Page 67 MUCFH-13NV- MUCFH-13NV- MUCFH-18NV- MUCFH-18NV- MUCFH-18NV- 13-8. ACCESSORY PARTS 13-7. OUTDOOR UNIT STRUCTURAL PARTS 13-7. OUTDOOR UNITSTRUCTURAL PARTS Part numbers that are circled is not shown in the illustration. Q'ty/unit Symbol MUCFH Part No. Part name in Wiring Remark 13NV- 18NV- Diagram E02 141 232 CABINET...
  • Page 68 OUTDOOR UNIT STRUCTURAL PARTS MUCFH-24NV- MUCFH-24NV-...
  • Page 69 OUTDOOR UNIT STRUCTURAL PARTS MUCFH-24NV- MUCFH-24NV- Part number that are circled is not shown in the illustration. Q'ty/unit Symbol MUCFH-24NV- in Wiring Remarks Part No. Part Name Diagram E02 214 232 CABINET FAN GUARD E02 214 521 E02 214 245 SERVICE PANEL E02 214 630 OUTDOOR HEAT EXCHANGER...
  • Page 70 MUCFH-24NV- 13-9. OUTDOOR UNIT NSTRUCTURAL PARTS 13-10. ACCESSORY PARTS...
  • Page 71 MUCFH-24NV- 13-9. OUTDOOR UNIT STRUCTURAL PARTS Part number that are circled is not shown in the illustration. Q'ty/unit Symbol Part No. Part Name Remarks in Wiring MUCFH-24NV- Diagram E02 214 297 TOP PANEL E02 540 309 RT63 AMBIENT TEMPERATURE THERMISTOR E02 444 961 4-WAY VALVE E02 529 490...

  • Page 72: Optional Parts

    MCFH - 13NV- MCFH - 18NV- MAC - 1700 DF MCFH - 24NV- HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD New publication, effective Mar. 2001 Distributed in Mar. 2001. No.OB267 248 Specifications subject to change without notice.

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