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Mitsubishi Electric MSZ-AY25VGKP-E6 User Manual

Mitsubishi Electric MSZ-AY25VGKP-E6
48 pages
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SERVICE MANUAL
INDOOR UNIT
PARTS CATALOG (OBB930)
CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS ··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES ··························6
5. OUTLINES AND DIMENSIONS ·····················7
6. WIRING DIAGRAM ·····································8
7. REFRIGERANT SYSTEM DIAGRAM ··········· 10
8. SERVICE FUNCTIONS ······························ 11
9. MICROPROCESSOR CONTROL ·················17
10. TROUBLESHOOTING ······························· 25
11. DISASSEMBLY INSTRUCTIONS ················· 41
Models
MSZ-AY25VGK -
E6
MSZ-AY25VGKP -
E6
MSZ-AY35VGK -
E6
MSZ-AY35VGKP -
E6
MSZ-AY42VGK -
E6
MSZ-AY42VGKP -
E6
MSZ-AY50VGK -
E6
MSZ-AY50VGKP -
E6
Outdoor unit service manual
MUZ-AY∙VG/VGH Series (OBH931)
MXZ-F∙VF/VFH Series (OBH790)
No. OBH930
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Mitsubishi Electric MSZ-AY25VGKP-E6 Specifications

General IconGeneral
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
RefrigerantR32
Energy Efficiency Class (Cooling)A+++
Energy Efficiency Class (Heating)A++
Weight (Outdoor Unit)28 kg
Power Supply220-240 V, 50 Hz
Outdoor Unit Weight28 kg
TypeAir Conditioner
Indoor Unit Noise Level19 dB(A)
Noise Level (Outdoor Unit)46 dB

Summary

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

ACCESSORIES

Lists included items and optional parts for the unit.

SPECIFICATION

NOISE CRITERIA CURVES

OUTLINES AND DIMENSIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

SERVICE FUNCTIONS

TIMER SHORT MODE

Allows reducing timer set times for service purposes.

HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT

Guides on assigning remote controllers to specific indoor units.

AUTO RESTART FUNCTION

Describes the unit's ability to resume operation after power interruption.

Wi-Fi INTERFACE SETTING UP

Details the process for connecting the Wi-Fi interface to a network.

CHANGING THE CORRECTION VALUE OF THE ROOM TEMPERATURE (THE INLET TEMPERATURE)

Explains how to adjust the room temperature sensor calibration.

MICROPROCESSOR CONTROL

WIRELESS REMOTE CONTROLLER

Explains the features and layout of the wireless remote control.

INDOOR UNIT DISPLAY SECTION

Describes the indicators and status lights on the indoor unit.

COOL (C) OPERATION

Explains the cooling mode operation, including frost prevention.

DRY (0) OPERATION

Details the dehumidification mode and its specific operations.

FAN (8) OPERATION

Outlines the operation of the fan-only mode without cooling or heating.

HEAT (0) OPERATION

Describes the heating mode, including cold air prevention and defrosting.

AUTO CHANGE OVER AUTO MODE OPERATION

Explains how the unit automatically switches between COOL and HEAT modes.

AUTO VANE OPERATION

Covers the control of horizontal and vertical vanes for airflow direction.

TIMER OPERATION

Details how to set and use the ON/OFF timers for unit operation.

WEEKLY TIMER OPERATION

Explains the programming of daily and weekly operating schedules.

NIGHT MODE () OPERATION

Describes the function to reduce noise and dim indicators for quiet operation.

i-save (3) OPERATION

Explains the mode for saving and recalling preferred settings.

OPERATION LOCK

Describes how to lock operation settings to prevent accidental changes.

AIR PURIFYING (++) OPERATION (MSZ-AY-VGKP)

Details the air purification function and its operation.

SELF CLEAN () OPERATION

Explains the self-cleaning cycle performed after cooling or dry operation.

EMERGENCY/TEST OPERATION

Covers the procedure for manual operation and testing.

3-MINUTE TIME DELAY OPERATION

Explains the compressor protection mechanism against frequent restarts.

TROUBLESHOOTING

10-1. CAUTIONS ON TROUBLESHOOTING

Lists important safety precautions and checks before starting troubleshooting.

10-2. FAILURE MODE RECALL FUNCTION

Explains how to retrieve and interpret error codes stored by the unit.

10-3. INSTRUCTION OF TROUBLESHOOTING

Provides detailed diagnostic steps for specific operational problems.

1. Check of the unit.

Initial checks for unit operation, power, and remote signal reception.

2. Check of Wi-Fi interface

Steps to diagnose and resolve issues with the Wi-Fi connectivity.

10-4. TROUBLESHOOTING CHECK TABLE

A table correlating indicator patterns with specific failure modes and remedies.

10-5. TROUBLESHOOTING CRITERION OF MAIN PARTS

Provides resistance values and checks for key internal components.

10-6. TROUBLESHOOTING FLOW

Flowcharts to guide troubleshooting for specific component failures.

A Check of indoor fan motor

Diagnosing issues related to the indoor fan motor's operation.

B Check of remote controller and indoor electronic control P.C. board

Troubleshooting steps for the remote control and main control board.

C Check of indoor P.C. board and indoor fan motor

Specific checks for the indoor control board and fan motor connections.

D How to check miswiring and serial signal error

Procedures for verifying wiring integrity and communication signals.

E Check of AIR PURIFYING power

Steps to troubleshoot the air purification function and its components.

10-7. TEST POINT DIAGRAM AND VOLTAGE

Provides detailed schematics and voltage measurement points for diagnostics.

Electromagnetic noise enters into TV sets or radios

DISASSEMBLY INSTRUCTIONS

Detaching method of the terminal with locking mechanism

Instructions on how to disconnect electrical terminals with locking features.

OPERATING PROCEDURE

Detailed steps for removing various panels and internal components.

1. Removing the front panel and the panels (R/L/F/U)

Instructions for removing the main external panels of the indoor unit.

Removing the panel (R) (Photos 1, 2, Figure 1)

Specific steps for detaching the right-side panel.

Removing the panel (L) (Photos 1, 2, Figure 1)

Specific steps for detaching the left-side panel.

Removing the panel (F) (Photos 1, 2, 3 Figure 1)

Specific steps for detaching the front panel.

Removing the panel (U) (Photo 2, Figure 1)

Specific steps for detaching the upper panel.

Removing the Wi-Fi interface (Photos 3, 5)

Procedure for safely removing the Wi-Fi interface module.

How to install the Wi-Fi interface (Photo 3)

Instructions for correctly installing the Wi-Fi interface.

Removing the indoor electrical box and the air purifying device (Photos 3, 4, 5, 6)

Steps to remove the electrical box and air purifying components.

Removing the nozzle assembly

Procedure for removing the air outlet nozzle assembly.

Removing the vane motors (U) (L) (horizontal) and the vane motor (vertical)

Instructions for removing the motors controlling the vanes.

Fixing the indoor coil thermistor

Guidance on correctly installing the indoor coil thermistor.

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