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Mitsubishi Heavy Industries SRF25ZS-W User Manual

Mitsubishi Heavy Industries SRF25ZS-W
44 pages
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SERVICE MANUAL
INVERTER FLOOR STANDING TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRF25ZS-W / SRC25ZS-W2
SRF35ZS-W / SRC35ZS-W2
SRF50ZSX-W / SRC50ZSX-W2
Manual No.’20 SRF-SM-311
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Mitsubishi Heavy Industries SRF25ZS-W Specifications

General IconGeneral
TypeSplit System
Cooling Capacity2.5 kW
Heating Capacity3.2 kW
Power Supply220-240 V, 50 Hz
Indoor Unit Weight9.5 kg
Outdoor Unit Weight31 kg
RefrigerantR32
Indoor Unit Noise Level21 dB(A)

Summary

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

Operation control function by wireless remote control

Explains how to use the wireless remote control for various operations.

Unit ON/OFF button

Describes the function and operation of the unit's physical ON/OFF button.

Auto restart function

Details the auto restart feature that resumes operation after a power interruption.

Installing two air-conditioners in the same room

Provides instructions for setting up two units in a single room with one remote.

Selection of the annual cooling function

Explains how to enable or disable the annual cooling control function.

High power operation

Describes the high power mode for intensified cooling or heating for 15 minutes.

Economy operation

Details the economy mode for energy saving by suppressing operation power.

Flap control

Explains how to control the flap direction and swing using the remote.

Air outlet selection

Describes switching between upper/lower air outlets and auto air outlet selection.

Timer operation

Covers comfortable timer (ON timer), sleep timer, OFF timer, and weekly timer operations.

Silent mode

Explains the silent mode operation that reduces noise by adjusting fan and compressor speeds.

Night setback

Describes the night setback function for heating operation at a set temperature.

Outline of heating operation

Details the operational aspects and components during heating mode.

Outline of cooling operation

Explains the operational aspects and components during cooling mode.

Outline of dehumidifying (DRY) operation

Describes the purpose and control of the dehumidifying (DRY) mode.

Outline of automatic operation

Details how the operation mode is determined and changes automatically.

Protective control function

Explains various protective controls like dew prevention and overload protection.

MAINTENANCE DATA

Cautions

Provides essential safety precautions for disassembling and working on the unit.

Items to check before troubleshooting

Lists initial checks to perform before starting troubleshooting procedures.

Troubleshooting procedure (If the air-conditioner does not run at all)

Step-by-step guide for diagnosing issues when the unit does not operate.

Troubleshooting procedure (If the air-conditioner runs)

Guide for diagnosing problems when the unit is running but malfunctioning.

Self-diagnosis table

Explains how to interpret error codes displayed by the unit's self-diagnosis system.

Service mode (Trouble mode access function)

Details how to access and use the service mode for detailed troubleshooting.

Inspection procedures corresponding to detail of trouble

Provides detailed inspection steps for specific trouble details.

Phenomenon observed after short-circuit, wire breakage on sensor

Describes phenomena caused by short circuits or wire breakages on sensors.

Checking the indoor electrical equipment

Guides for checking the indoor unit PCB and fan motor.

How to make sure of wireless remote control

Provides steps to check if the wireless remote control is functioning correctly.

Inspection procedure for blown fuse on the indoor and outdoor unit PCB

Outlines the procedure to inspect for blown fuses on unit PCBs.

Outdoor unit inspection points

Highlights key inspection points for the outdoor unit and its components.

ELECTRICAL WIRING

Indoor units

Wiring diagrams and component identification for indoor units.

Outdoor units

Wiring diagrams and component identification for outdoor units.

PIPING SYSTEM

Models SRF25ZS-W, 35ZS-W

Piping diagram for SRF25ZS-W and 35ZS-W models.

Model SRF50ZSX-W

Piping diagram for the SRF50ZSX-W model.

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