Mitsubishi Electric MSZ-AP25VG-E1 Service Manual
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Mitsubishi Electric MSZ-AP25VG-E1 Service Manual

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INDOOR UNIT
SERVICE MANUAL
Models
MSZ-AP25VG
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MSZ-AP35VG
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MSZ-AP42VG
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MSZ-AP50VG
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MSZ-AP60VG
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MSZ-AP71VG
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MSZ-AP25VG
MSZ-AP25VGK
MSZ-AP35VG
MSZ-AP35VGK
MSZ-AP42VG
MSZ-AP42VGK
MSZ-AP50VG
MSZ-AP50VGK
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Revision C:
MSZ-AP25/35/42VGK-
MSZ-AP50VG-
MSZ-AP50VGK-
OBH788 REVISED EDITION-B is void.
MSZ-AP25VGK
MSZ-AP35VGK
MSZ-AP42VGK
MSZ-AP50VGK
MSZ-AP60VGK
MSZ-AP71VGK
Outdoor unit service manual
MUZ-AP∙VG/VGH Series (OBH789)
MXZ-D∙VA/VAH Series (OBH626)
MXZ-E∙VA/VAH Series (OBH723)
MXZ-F∙VF/VFH Series (OBH790)
CONTENTS
1. TECHNICAL CHANGES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3
2. PART NAMES AND FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4
3. SPECIFICATION ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 6
4. NOISE CRITERIA CURVES ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 9
6. WIRING DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12
7. REFRIGERANT SYSTEM DIAGRAM ∙∙∙∙∙∙∙∙∙∙∙∙∙ 18
8. SERVICE FUNCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 19
9. MICROPROCESSOR CONTROL ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 21
10. TROUBLESHOOTING ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 29
11. DISASSEMBLY INSTRUCTIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 45
PARTS CATALOG (OBB788)
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No. OBH788
REVISED EDITION-C
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Summary of Contents for Mitsubishi Electric MSZ-AP25VG-E1

  • Page 1: Table Of Contents

    Revision C: • MSZ-AP25/35/42VG- MSZ-AP25/35/42VGK- MSZ-AP50VG- MSZ-AP50VGK- MSZ-AP60/71VG- MSZ-AP60/71VGK- have been added. OBH788 REVISED EDITION-B is void. INDOOR UNIT No. OBH788 SERVICE MANUAL REVISED EDITION-C Models MSZ-AP25VG MSZ-AP25VGK MSZ-AP35VG MSZ-AP35VGK MSZ-AP42VG MSZ-AP42VGK MSZ-AP50VG MSZ-AP50VGK MSZ-AP60VG MSZ-AP60VGK MSZ-AP71VG MSZ-AP71VGK Outdoor unit service manual MUZ-AP∙VG/VGH Series (OBH789) MXZ-D∙VA/VAH Series (OBH626) MXZ-E∙VA/VAH Series (OBH723)

  • Page 2: Msz-Ap25/35/42Vg

    Use the specified 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: E1 En1 Et1 Er1

    TECHNICAL CHANGES These models are compatible with the outdoor units with low standby power control. Connecting these models to the MUZ-AP∙VG/VGH series outdoor units enables the low standby power control. These models may be connected to the MUZ-AP∙VG/VGH series after once connected to the MXZ series and operated, for example because of relocation.

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK Front panel Air inlet Wi-Fi interface MSZ-AP·VGK Air fi lter Air cleaning fi lter (Silver-ionized air purifi er fi lter, option) Emergency Horizontal vane operation switch Spec name plate Heat exchanger Air outlet Operation indicator lamp...
  • Page 5 MSZ-AP60VG MSZ-AP71VG MSZ-AP60VGK MSZ-AP71VGK Air inlet Front panel Wi-Fi interface MSZ-AP·VGK Emergency operation switch Air fi lter Heat exchanger Air cleaning fi lter (Silver-ionized air purifi er fi lter, option) Horizontal vane Air outlet Spec name plate Operation indicator lamp Remote control receiving section Remote controller...

  • Page 6: Specification

    SPECIFICATION MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG Indoor model MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.18 0.24 Running current Heating 0.26 0.32 Model RC0J30-CV Cooling 0.18 0.24 Current 1 Heating 0.26 0.32 Dimensions W ×...
  • Page 7 MSZ-AP60VG MSZ-AP71VG Indoor model MSZ-AP60VGK MSZ-AP71VGK Power supply Single phase 230 V, 50 Hz Cooling Power input Heating Cooling 0.37 0.38 Running current Heating 0.43 0.40 Model RC0J56-AH Cooling 0.37 0.38 Current Heating 0.43 0.40 Dimensions W × H × D 1100 ×...
  • Page 8 Specifications and rated conditions of main electric parts T3.15AL250V Fuse (F11) Horizontal vane motor (MV1) 12 VDC Vertical vane motor (MV2) 12 VDC Varistor (NR11) 470 V Terminal block (TB) OBH788C...

  • Page 9: Noise Criteria Curves

    NOISE CRITERIA CURVES MSZ-AP25VG MSZ-AP35VG MSZ-AP25VGK MSZ-AP35VGK FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High 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...
  • Page 10 MSZ-AP60VG MSZ-AP71VG MSZ-AP60VGK MSZ-AP71VGK FAN SPEED FUNCTION SPL(dB(A)) LINE FAN SPEED FUNCTION SPL(dB(A)) LINE COOLING COOLING Super High Super High 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...

  • Page 11: Outlines And Dimensions ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙11

    OUTLINES AND DIMENSIONS Unit: mm MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK INSTALLATION PLATE 11×20 OBLONG HOLE 11×26 OBLONG HOLE WALL HOLE 65 INDOOR UNIT INSTALLATION PLATE AIR IN PIPING DRAIN HOSE MIN 20mm MIN 40mm AIR OUT (MSZ-AP25/35/42/50VG- MSZ-AP25/35/42/50VGK- INSULATION Ø37 O.D...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM MSZ-AP25VG- MSZ-AP35VG- MSZ-AP42VG- MSZ-AP25VG- MSZ-AP35VG- MSZ-AP42VG- OBH788C...
  • Page 13 MSZ-AP50VG- MSZ-AP50VG- OBH788C...
  • Page 14 MSZ-AP60VG- MSZ-AP71VG- MSZ-AP60VG- MSZ-AP71VG- OBH788C...
  • Page 15 MSZ-AP25VGK- MSZ-AP35VGK- MSZ-AP42VGK- MSZ-AP25VGK- MSZ-AP35VGK- MSZ-AP42VGK- OBH788C...
  • Page 16 MSZ-AP50VGK- MSZ-AP50VGK- OBH788C...
  • Page 17 MSZ-AP60VGK- MSZ-AP71VGK- MSZ-AP60VGK- MSZ-AP71VGK- OBH788C...

  • Page 18: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MSZ-AP25VG MSZ-AP35VG MSZ-AP60VG Unit: mm MSZ-AP25VGK MSZ-AP35VGK MSZ-AP60VGK Refrigerant pipe ø9.52 [MSZ-AP25/35VG, MSZ-AP25/35VGK] ø12.7 [MSZ-AP60VG, MSZ-AP60VGK] (with heat insulator) Indoor coil Indoor thermistor heat RT12 (main) exchanger Flared connection Indoor coil thermistor RT13 (sub) Room temperature thermistor RT11 Flared connection Refrigerant pipe ø6.35...

  • Page 19: Service Functions

    SERVICE FUNCTIONS MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP60VG MSZ-AP71VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK MSZ-AP60VGK MSZ-AP71VGK 8-1. TIMER SHORT MODE For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C. board. (Refer to 10-7.) •...
  • Page 20 Electric’s MELCloud Wi-Fi service. Third party Wi-Fi interfaces cannot be connected to MELCloud. Mitsubishi Electric is not responsible for any (i) under performance of a sys- tem or any product; (ii) system or product fault; or (iii) loss or damage to any system or product;...

  • Page 21: Microprocessor Control

    MICROPROCESSOR CONTROL MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP60VG MSZ-AP71VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK MSZ-AP60VGK MSZ-AP71VGK WIRELESS REMOTE CONTROLLER MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK Signal transmitting section Distance of signal : About 6 m Beep(s) is (are) heard from the indoor unit when the signal is received.
  • Page 22 INDOOR UNIT DISPLAY SECTION 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 of the indication. Indication Operation state Room temperature The unit is operating to About 2°C or more away reach the set temperature from set temperature...
  • Page 23 9-4. HEAT ( ) OPERATION (1) Press STOP/OPERATE (OFF/ON) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select HEAT mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons TEMP button to select the desired temperature. The setting range is 10 - 31°C. 1.
  • Page 24 9-6. AUTO VANE OPERATION 1. Horizontal vane (1) Vane motor drive 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 (approximately 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
  • Page 25 (11) LONG MODE ( ) (MSZ-AP60/71VG, MSZ-AP60/71VGK) By pressing LONG button indoor fan speed becomes faster than setting fan speed on the remote controller, and the horizontal vane moves to the position for LONG mode. The remote controller displays “ ”.
  • Page 26 PROGRAM TIMER • OFF timer and ON timer can be used in combination. The set time that is reached first will operate first. • “ ” and “ ” display shows the order of OFF timer and ON timer operation. (Example 1) The current time is 8:00 PM.
  • Page 27 (3) Press , and buttons to set ON/OFF, time, and temperature. E.g. : [ON], [6:00] and [24°C] are selected. Pressing selects ON/OFF timer. Pressing Pressing adjusts the time. adjusts the tem- Pressing perature. deletes timer setting. * Hold down the button to change the time quickly. * The temperature can be set between 16°C and 31°C at cool operation.
  • Page 28 9-10. i-save ( ) OPERATION 1. How to set i-save operation (1) Press STOP/OPERATE (OFF/ON) button. (2) Select COOL, ECONO COOL, HEAT or NIGHT mode. (3) Press i-save button. (4) Set the temperature, fan speed, and airflow direction for i-save operation. NOTE: •...

  • Page 29: Troubleshooting

    TROUBLESHOOTING MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP60VG MSZ-AP71VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK MSZ-AP60VGK MSZ-AP71VGK 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, and after confirm- ing the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.
  • Page 30 10-2. 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 (10-4.) disappears, the memorized failure details can be recalled. 1.
  • Page 31 2. Table of indoor unit failure mode recall function NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (10-4.). The upper lamp Abnormal point of OPERATION Condition Remedy (Failure mode) INDICATOR lamp Not lit Normal —...
  • Page 32 10-3. INSTRUCTION OF TROUBLESHOOTING 1. Check of the unit. Start NOTE: The indoor unit does not operate by smartphone, refer to 10-3.2."Check of Wi-Fi Interface". Indoor unit operates. Indoor unit operates. Indoor unit does OPERATION INDICATOR Outdoor unit does not Outdoor unit does not receive the lamp on the indoor unit is...
  • Page 33 2. Check of Wi-Fi interface (MSZ-AP∙VGK) Follow the procedure below if the air conditioner cannot be monitored or controlled with a device such as a smartphone. Start There is a problem in communication between the air conditioner and Is the UNIT lamp on the Wi-Fi interface blinking? the Wi-Fi interface.
  • Page 34 10-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp blinks. OPERATION INDICATOR Blinking Not lit...
  • Page 35 OPERATION INDICATOR Blinking Not lit Abnormal Operation indicator lamp Symptom Condition Remedy point Upper lamp lights and lower lamp blinks. The operation mode of the each indoor unit MXZ type Outdoor unit is differently set to COOL (includes DRY) and •...
  • Page 36 10-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay enough attention to the high voltage on the fan motor connector CN211. Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch.
  • Page 37 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press STOP/OPERATE (OFF/ON) button 1 Look at the image of the signal transmitting section of on the remote controller. the remote controller through the monitor of a digital camera or a camera phone.
  • Page 38 C Check of indoor P.C. board and indoor fan motor MSZ-AP25/35/42/50VG MSZ-AP25/35/42/50VGK Turn OFF the power supply. Remove the indoor fan motor connector Measure the resistance of indoor fan CN211 and the vane motor connector Short circuit: motor. CN151 from the indoor electronic control Replace the indoor fan motor.
  • Page 39 MSZ-AP60/71VG MSZ-AP60/71VGK Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane Short/open circuit: Measure the resistance between CN211 Replace the indoor fan motor. motor connector CN151 and CN152 from the indoor of the indoor fan motor connector. electronic control P.C.
  • Page 40 D How to check miswiring and serial signal error MUZ Type Turn the main power supply OFF. 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 (MXZ) series and operated (turned on)? The connection information to the Multi series is stored...
  • Page 41 MXZ Type Turn OFF the power supply. LED indication for communication status Communication status is indicated Is there rated voltage in by the LED. Check the power supply. the power supply? Unit status Blinking: normal communication Lit: abnormal communication or Turn ON the power supply.
  • Page 42 E 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 43 10-7. TEST POINT DIAGRAM AND VOLTAGE 1. Indoor electronic control P.C. board, indoor terminal P.C. board, receiver P.C. board, display board and switch/buzzer P.C. board MSZ-AP25VG MSZ-AP35VG MSZ-AP42VG MSZ-AP50VG MSZ-AP25VGK MSZ-AP35VGK MSZ-AP42VGK MSZ-AP50VGK Indoor terminal P.C. board To disable "Auto restart function" Receiver P.C.
  • Page 44 2. Indoor electronic control P.C. board, indoor terminal P.C. board, receiver P.C. board, display P.C. board and switch/buzzer P.C. board MSZ-AP60VG MSZ-AP71VG MSZ-AP60VGK MSZ-AP71VGK Connector to Indoor fan motor (CN211) (+)0 or 15 VDC (+)3-6 VDC 15 VDC Indoor terminal P.C. board Indoor electronic control P.C.

  • Page 45: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism> The terminal which has the locking mechanism can be detached as shown below. There are 2 types of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 46 OPERATING PROCEDURE PHOTOS/FIGURES Removing the panel (R) (Photos 1, 2, Figure 1) Photo (1) Remove the front panel and the horizontal vanes (U) (L). Screw of the Screws of the Panel (F) (2) Remove the screw cap on the panel (R), and the panel (L) panel (R) screw.
  • Page 47 OPERATING PROCEDURE PHOTOS/FIGURES Wi-Fi 2. Removing the Wi-Fi interface (Photos 3, 5) Photo 3 interface MSZ-AP ∙ Screw of the (1) Remove the front panel and the horizontal vanes (U) electrical cover (L). (2) Remove the panels (R) (L) (U). Catch of the (3) Remove the Wi-Fi interface on the right side of the water cover...
  • Page 48 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor electrical box Photo 4 (Photos 3, 4, 5) Earth wire connected to Lead wire of indoor the indoor heat exchanger (1) Remove the front panel and the horizontal vanes (U) coil thermistor (L). (2) Remove the panels (R) (L) (U) (F).
  • Page 49 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the nozzle assembly Photo 6 (1) Remove the front panel and the horizontal vanes (U) (L). (2) Remove the panels (R) (L) (U) (F). (3) Remove the indoor/outdoor connecting wire (Refer to section 3). (4) Remove the electrical cover (Refer to section 3). (5) Disconnect the following connector: <Indoor electronic control P.C.
  • Page 50 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the line flow fan, the indoor fan motor Photo 9 assembly, the indoor coil thermistor (Photo 9, 10, 11) Heat exchanger (1) Remove the front panel, the horizontal vanes (U) (L), the panels (R) (L) (F) (U), the Wi-Fi interface (MSZ- AP∙VGK), the electrical box, and the nozzle assem- bly.
  • Page 51 11-2. MSZ-AP60VG MSZ-AP71VG MSZ-AP60VGK MSZ-AP71VGK NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the panel Photo 1 (1) Remove the horizontal vanes. Front panel Horizontal vanes (2) Remove the screw caps of the panel. Remove the screws of the panel.
  • Page 52 OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing the indoor terminal P.C. board, the Photo 3 indoor electronic control P.C. board, the display Panel (F) Electrical box P.C. board, switch/buzzer P.C. board and the receiver P.C. board Catch of the (1) Remove the panel (Refer to section 1.) and the right water cover corner box.
  • Page 53 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing the nozzle assembly Photo 5 (1) Remove the panel (Refer to section 1.) and the right corner box. (2) Remove the V.A. clamp, and then the indoor/outdoor connecting wire. (Photo 3) (3) Remove the electrical cover. (Photo 3) (4) Disconnect the following connectors on the electronic control P.C.
  • Page 54 OPERATING PROCEDURE PHOTOS/FIGURES 8. Removing the water cut, the indoor fan motor, Photo 9 the indoor coil thermistor, and the line flow fan (1) Remove the panel (Refer to section 1.) and the right corner box. (2) Remove the display and receiver holder, the electrical box and the nozzle assembly.
  • Page 55 Fixing the indoor coil thermistor There are 2 forms of parts for fixing the indoor coil thermistor. When fixing the indoor coil thermistor to the clip-shape/holder-shape part, the Clip shape Holder shape lead wire should point down. About the same length Position and procedure for mounting the clip-shape part 1.
  • Page 56 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2017 MITSUBISHI ELECTRIC CORPORATION Issued: Dec. 2019. No. OBH788 REVISED EDITION-C Issued: Mar. 2019. No. OBH788 REVISED EDITION-B Issued: May 2018. No. OBH788 REVISED EDITION-A Published: Dec. 2017. No. OBH788 Made in Japan Specifications are subject to change without notice.

This manual is also suitable for:

Msz-ap35vg-e1Msz-ap42vg-e1Msz-ap50vg-e1Msz-ap25vgk-e1Msz-ap35vgk-e1Msz-ap42vgk-e1 ... Show all

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