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Mitsubishi Heavy Industries SRK20ZSX-W User Manual

Mitsubishi Heavy Industries SRK20ZSX-W
167 pages
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Manual No.'19SCM-SM-276
SERVICE MANUAL
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM71ZS-W
80ZS-W
(INDOOR UNIT)
Wall mounted type
SRK20ZSX-W,-WB,-WT
Duct connected-Low/Middle static pressure type
FDUM50VH
SRK71ZR-W
25ZSX-W,-WB,-WT
35ZSX-W,-WB,-WT
50ZSX-W,-WB,-WT
60ZSX-W,-WB,-WT
SRK20ZS-W,-WB,-WT
25ZS-W,-WB,-WT
35ZS-W,-WB,-WT
50ZS-W,-WB,-WT
4-way ceiling cassette type
FDTC25VH
35VH
50VH
60VH
Ceiling concealed type
SRR25ZM-W
35ZM-W
50ZS-W
60ZS-W
Ceiling suspended type
FDE50VH

Table of Contents

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Mitsubishi Heavy Industries SRK20ZSX-W Specifications

General IconGeneral
TypeWall Mounted
Cooling Capacity2.0 kW
Heating Capacity2.7 kW
Power Supply220-240V, 50Hz
RefrigerantR32
Energy Efficiency Class CoolingA+++

Summary

Operation Control Overview

SRK and SRR Series Operation Control

Details operation control for SRK and SRR series, including wireless remote functions and specific modes.

SRK-ZSX Series Operation Control Functions

Covers wireless remote operation, basic modes, advanced features, settings, and protective controls for SRK-ZSX.

Wireless Remote Control Operation for SRK-ZSX

Detailed explanation of the wireless remote control functions, buttons, and display for SRK-ZSX series.

SRK-ZSX Series Basic Operations and Setup

Covers Unit ON/OFF, Auto Restart, Dual Unit Installation, Annual Cooling, and Heating Only functions.

SRK-ZSX Series Advanced Operation Modes

Explains Economy, Airflow Direction, 3D Auto, Timer, Silent, and Night Setback operations.

SRK-ZSX Series System Settings and Features

Details airflow range, display brightness, auto-off, dehumidifying, and automatic operation settings.

SRK-ZSX Series Protective Control Functions

Covers various protective functions to safeguard the air conditioning system.

SRK-ZS Series Operation Control

Details operation control functions, remote operations, and specific modes for the SRK-ZS series.

SRK-ZR Series Operation Control

Explains operation control functions, remote operations, and specific modes for the SRK-ZR series.

SRR Series Operation Control

Details operation control functions, remote usage, and modes for the SRR series.

FDTC, FDUM, and FDE Series Operation Control

Wired Remote Control Operation for FDTC/FDUM/FDE

Explains the operation and features of the wired remote control (RC-EX3A) for FDTC/FDUM/FDE.

FDTC/FDUM/FDE Indoor Unit Auto Operation Control

Explains the auto operation control function managed by the indoor unit for FDTC/FDUM/FDE series.

Maintenance Data and Troubleshooting

SRK and SRR Series Maintenance and Troubleshooting

Guides on troubleshooting, safety, items to check, and using self-diagnosis for SRK/SRR series.

Troubleshooting Procedures for SRK/SRR Series

Guides on troubleshooting, safety, items to check, and using self-diagnosis for SRK/SRR series.

SRK/SRR Series Self-Diagnosis and Error Codes

Provides a table of error codes, their causes, and symptoms for SRK/SRR series.

Service Mode Access and Data Interpretation for SRK/SRR

Explains how to access service mode and interpret service/self-diagnosis data for SRK/SRR series.

FDTC, FDUM, and FDE Series Diagnosis and Troubleshooting

Covers diagnosis and troubleshooting for microcomputer circuits and various error codes.

Microcomputer Circuit Diagnosis for FDTC/FDUM/FDE

Details self-diagnosis functions and troubleshooting for microcomputer circuits in FDTC/FDUM/FDE series.

Indoor Unit Error Code Diagnosis (FDTC/FDUM/FDE)

Lists and explains error codes for indoor units in FDTC/FDUM/FDE series.

Outdoor Unit Error Code Diagnosis (FDTC/FDUM/FDE)

Lists and explains error codes for outdoor units in FDTC/FDUM/FDE series.

Troubleshooting Flowcharts for FDTC/FDUM/FDE Series

Provides flowcharts for diagnosing and resolving various troubles in FDTC/FDUM/FDE series.

Troubleshooting: Unit Operates but Does Not Cool

Step-by-step guide to diagnose and fix issues when the air conditioner operates but does not cool.

Troubleshooting: Unit Operates but Does Not Heat

Step-by-step guide to diagnose and fix issues when the air conditioner operates but does not provide heat.

Troubleshooting: Earth Leakage Breaker Activated

Explains how to diagnose and resolve earth leakage breaker activation issues.

Troubleshooting: Excessive Noise and Vibration

Provides initial steps to diagnose and address excessive noise and vibration issues.

Troubleshooting: Power Source Errors

Guides on diagnosing and resolving power source system errors affecting the indoor unit control PCB.

Troubleshooting: INSPECT I/U Errors

Explains how to troubleshoot and resolve INSPECT I/U errors related to remote control connections.

Troubleshooting: Initial Communication Errors

Details how to diagnose and fix communication errors occurring at initial operation.

Troubleshooting: Communication Error Resolution Steps

Final troubleshooting steps and potential causes for communication errors between units and remote.

Specific Error Code Diagnosis (E6-E60)

Details specific error codes (E6-E60) and their troubleshooting procedures.

Electrical Wiring Diagrams

Outdoor Unit Electrical Wiring

Provides electrical wiring diagrams for the outdoor units of SCM71ZS-W and 80ZS-W models.

Indoor Unit Electrical Wiring Diagrams

Details electrical wiring for various indoor unit types including SRK, SRR, FDTC, FDUM, and FDE series.

Piping System Diagrams

Outdoor Unit Piping System Diagrams

Illustrates the piping system for outdoor units of SCM71ZS-W and 80ZS-W models.

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