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Mitsubishi Electric MUZ-GF60VE Service Manual

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SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models
MUZ-GF60VE
MUZ-GF71VE
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
-
E1
-
E1
CONTENTS
1. TECHNICAL CHANGES ··································· 3
2. PART NAMES AND FUNCTIONS ····················· 4
3. SPECIFICATION ················································ 5
4. NOISE CRITERIA CURVES ······························ 7
5. OUTLINES AND DIMENSIONS ························ 8
6. WIRING DIAGRAM ············································ 9
7. REFRIGERANT SYSTEM DIAGRAM ············· 10
8. PERFORMANCE CURVES ····························· 12
9. ACTUATOR CONTROL ··································· 21
10. SERVICE FUNCTIONS ···································· 22
11. TROUBLESHOOTING ····································· 22
12. DISASSEMBLY INSTRUCTIONS ···················· 39
PARTS CATALOG (OBB635)
No. OBH635
HFC
utilized
R410A
Indoor unit service manual
MSZ-GF•VE Series (OBH634)

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Summary of Contents for Mitsubishi Electric MUZ-GF60VE

  • Page 1: Table Of Contents

    SPLIT-TYPE AIR CONDITIONERS OUTDOOR UNIT No. OBH635 SERVICE MANUAL utilized R410A Models MUZ-GF60VE MUZ-GF71VE Indoor unit service manual MSZ-GF•VE Series (OBH634) CONTENTS 1. TECHNICAL CHANGES ··································· 3 2. PART NAMES AND FUNCTIONS ····················· 4 3. SPECIFICATION ················································ 5 4. NOISE CRITERIA CURVES ······························ 7 5.
  • Page 2 Use the specifi ed refrigerant only 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 3: Technical Changes

    TECHNICAL CHANGES MUZ-GF60VE - MUZ-GF71VE - 1. New model OBH635...

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS MUZ-GF60VE MUZ-GF71VE Air inlet (back and side) Piping Drain hose Air outlet Drain outlet ACCESSORIES Model MUZ-GF60/71VE Drain socket OBH635...

  • Page 5: Specification

    SPECIFICATION Outdoor model MUZ-GF60VE MUZ-GF71VE Power supply Single phase, 230 V, 50 Hz Cooling 6.1 (1.4 - 7.5) 7.1 (2.0 - 8.7) Capacity Rated frequency (Min. - Max.) Heating 6.8 (2.0 - 9.3) 8.1 (2.2 - 9.9) Breaker Capacity Cooling...
  • Page 6 Specifi cations and rated conditions of main electric parts Model MUZ-GF60VE MUZ-GF71VE Item Smoothing (CB1, CB2, CB3) 560 μF 450 V capacitor Fuse (F601, F880, F901) T3.15AL250 V (IC932) 5 A 600 V IGBT module (IC700) 20 A 600 V...

  • Page 7: Noise Criteria Curves

    NOISE CRITERIA CURVES MUZ-GF60VE MUZ-GF71VE FUNCTION SPL(dB(A)) LINE FUNCTION SPL(dB(A)) LINE COOLING COOLING HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20 NC-10 NC-10 1000 2000 4000 8000 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz...

  • Page 8: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MUZ-GF60VE MUZ-GF71VE Unit: mm REQUIRED SPACE 500 mm or more 417.5 Air in 100 mm or more Air out 2-holes 10 21 500 mm or more Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) 6.35 (MUZ-GF60VE) Ø...

  • Page 9: Wiring Diagram

    WIRING DIAGRAM MUZ-GF60VE MUZ-GF71VE OBH635...

  • Page 10: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MUZ-GF60VE Unit: mm Muffler Refrigerant pipe ø 15.88 #100 4-way valve (with heat insulator) Stop valve (with service port) Outdoor Flared connection Discharge heat Ambient temperature exchanger temperature thermistor Defrost thermistor RT62 thermistor RT65 RT61 Compressor Outdoor heat...
  • Page 11 Unit: mm MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: m Piping size O.D: mm Max. Length A Max. Height difference B Liquid 6.35 MUZ-GF60 15.88 9.52 MUZ-GF71 Indoor unit Max. Height difference Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: g) Refrigerant piping length (one way) Outdoor unit Model...

  • Page 12: Performance Curves

    PERFORMANCE CURVES MUZ-GF60VE MUZ-GF71VE The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi- tions 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 13 Total input (Cooling : at Rated frequency Indoor intake air Wet-bulb temperature( ) Outdoor intake air Dry-bulb temperature (°C) Heating capacity (at Rated frequency) 19.9 25.3 18.4 23.4 16.9 21.4 15.3 19.5 13.8 17.5 12.3 15.6 10.7 13.6 11.7 Outdoor intake air Wet-bulb temperature (°C) Total input (Heating : at Rated frequency 19.9...

  • Page 14: Cool Operation

    1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once, HEAT: Press twice). 2. Test run operation starts and continues to operate for 30 minutes. 3. Compressor operates at rated frequency in COOL mode or 58 Hz (MUZ-GF60VE)/74 Hz (MUZ-GF71VE) in HEAT mode. 4. Indoor fan operates at High speed.

  • Page 15: Heat Operation

    Outdoor unit current MUZ-GF60VE MUZ-GF71VE Ambient temperature (°C) Ambient temperature(°C) Ambient humidity(%) Ambient humidity(%) HEAT operation Condition: Indoor Outdoor Dry bulb temperature (°C) 20.0 20.0 Wet bulb temperature (°C) 14.5 14.5 Operation: Test run operation (Refer to 8-3.) Outdoor unit current...
  • Page 16 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-GF60VE CAPACITY: 6.1 kW SHF: 0.79 INPUT: 1790 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 7.17 4.37 0.61 1432 6.86 4.19 0.61 1504 6.59 4.02 0.61...
  • Page 17 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-GF60VE CAPACITY: 6.1 kW SHF: 0.79 INPUT: 1790 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 5.98 3.65 0.61 1754 5.49 3.35 0.61 1862 5.06 3.09 0.61 1933 6.28...
  • Page 18 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-GF71VE CAPACITY: 7.1 kW SHF: 0.78 INPUT: 2130 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT INPUT 8.34 5.01 0.60 1704 7.99 4.79 0.60 1789 7.67 4.60 0.60 1874 7.38...
  • Page 19 PERFORMANCE DATA COOL operation a t Rated frequency MUZ-GF71VE CAPACITY: 7.1 kW SHF: 0.78 INPUT: 2130 W OUTDOOR DB (°C) INDOOR INDOOR DB (°C) WB (°C) INPUT INPUT INPUT 6.96 4.17 0.60 2087 6.39 3.83 0.60 2215 5.89 3.54 0.60 2300 7.31 3.51...
  • Page 20 PERFORMANCE DATA HEAT operation at Rated frequency MUZ-GF60VE CAPACITY: 6.8 kW INPUT: 1810 W OUTDOOR WB (°C) INDOOR DB (°C) INPUT INPUT INPUT INPUT INPUT INPUT INPUT 4.28 1177 5.17 1412 6.05 1593 6.94 1720 7.82 1828 8.64 1882 9.52 1919 4.08...

  • Page 21: Actuator Control

    ACTUATOR CONTROL MUZ-GF60VE MUZ-GF71VE 9-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running.

  • Page 22: Service Functions

    SERVICE FUNCTIONS MUZ-GF60VE MUZ-GF71VE 10-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to 11-6-1.) Defrost fi nish temperature (°C) Jumper wire...

  • Page 23: Failure Mode Recall Function

    11-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (11-3.) disappears, the memorized failure details can be recalled. 1.
  • Page 24 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function. 1.
  • Page 25 3. Outdoor unit failure mode table The upper lamp of Indoor/outdoor Outdoor unit OPERATION Abnormal point LED indication unit failure Condition Remedy failure mode INDICATOR (Failure mode / protection) (Outdoor P.C. board) mode recall recall function lamp function (Indoor unit) None (Normal) —...

  • Page 26: Troubleshooting Check Table

    11-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 1-time fl ash every Outdoor power sys- Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of compres- does not op- 2.5 seconds within 1 minute after the compressor gets started. sor.
  • Page 27 (Example) When the fl ashing frequency is “2”. Flashing → 0.5-second ON 0.5-second ON 2.5-second OFF 2.5-second OFF 11-4. TROUBLE CRITERION OF MAIN PARTS MUZ-GF60VE MUZ-GF71VE Part name Check method and criterion Figure Defrost thermistor (RT61) Fin temperature thermistor (RT64) Measure the resistance with a tester.
  • Page 28 11-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between compressor and the IGBT module (IC700). Check the voltage between terminals. See 11-5. “Check of open phase”. Replace the inverter P.C. board. Are the voltages balanced? Check the compressor. See 11-5.
  • Page 29 D Check of compressor winding ●Disconnect the connector between the compressor and the IGBT module (IC700), and measure the resistance between the compressor terminals. <<Measurement point>> At 3 points BLK-WHT Measure the resistance between the lead wires at 3 points. BLK-RED WHT-RED <<Judgement>>...
  • Page 30 G Check of outdoor thermistors Disconnect the connector of thermistor in the outdoor P.C. board (see below table), and measure the resistance of thermistor. Replace the thermistor except RT64. Is the resistance of thermistor normal? When RT64 is abnormal, replace the inverter P.C. (Refer to 11-6.1.) board.
  • Page 31 I Check of outdoor fan motor Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 11-4.) Disconnect CN932 from the inverter P.C.
  • Page 32 J Check of power supply Disconnect the connector between the compressor and the IGBT module (IC700). Turn ON the power supply and Rectify indoor/outdoor press EMERGENCY OPERATION connecting wire. switch. Does the upper lamp of Is there voltage 230 VAC Replace the indoor OPERATION INDICATOR on the between the indoor terminal...
  • Page 33 K Check of LEV (Expansion valve) Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button. Hold down the other two buttons for another 3 sec- onds.
  • Page 34 L Check of inverter P.C. board Check the outdoor fan motor. (Refer to 11-5. .) Is the fuse (F901) blown on the in- verter P.C. board? Check the connection of the connectors (CN931, CN932) of the outdoor fan motor. If the connection is poor, make it correct. Operate the outdoor unit by starting EMERGENCY OPERATION.
  • Page 35 M How to check miswiring and serial signal error Turn the power supply OFF. NOTE: Refer to the indoor unit service manual. Is there rated voltage in the power supply? Check the power supply. Check for incorrect indoor-outdoor connecting wiring. Was the indoor unit ever connected to the Multi •...
  • Page 36 N Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
  • Page 37 11-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MUZ-GF60VE MUZ-GF71VE Fuse (F601) T3.15AL250V R.V. coil (CN602) 230VAC Heater (CN601) 230VAC Signal of out- door fan motor (CN931) LEV connector (CN724) Output to drive outdoor fan motor Defrost thermistor...
  • Page 38 2. Relay P.C. board MUZ-GF60VE MUZ-GF71VE CN60 To inverter P.C. board CN681 (CN680) L68B(-) 10 VDC L68A(+) OBH635...

  • Page 39: Disassembly Instructions

    Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 12-1. MUZ-GF60VE MUZ-GF71VE NOTE: Turn OFF power supply before disassembly. OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel.
  • Page 40 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 3 and relay P.C. board (1) Remove the cabinet and panels. (Refer to 1.) Screws of the (2) Disconnect the lead wire to the reactor and the following con- relay panel Inverter P.C Earth wires...
  • Page 41 OPERATING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor, Photo 5 Ambient defrost thermistor, outdoor heat exchanger tempera- Outdoor heat temperature exchanger ture thermistor and ambient temperature thermistor thermistor temperature thermistor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
  • Page 42 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2013 MITSUBISHI ELECTRIC CORPORATION New publication, effective Mar. 2013 Distributed in Mar. 2013. No. OBH635 Specifications are subject to change without notice. Made in Japan...

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Muz-gf71ve

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