Mitsubishi Heavy Industries SCM60ZS-W User Manual

Manual No.'19・SCM-SM-281
SERVICE MANUAL
INVERTER MULTI-SPLIT SYSTEM
RESIDENTIAL AIR-CONDITIONERS
(Split system, air to air heat pump type)
(OUTDOOR UNIT)
SCM50ZS-W
60ZS-W
(INDOOR UNIT)
Wall mounted type
SRK20ZSX-W,-WB,-WT
Duct connected-Low/Middle static pressure type
FDUM50VH
SKM20ZSP-W
25ZSP-W
35ZSP-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

Mitsubishi Heavy Industries SCM60ZS-W Specifications

General

Cooling Capacity (kW)	6.0
Energy Efficiency Ratio (EER)	3.21
Power Supply	220-240V, 50Hz
Refrigerant	R32
Type	Split System
Weight (Indoor Unit)	Varies depending on the connected indoor unit model

Summary

Outline of Operation Control by Microcomputer

SRK-ZS Series

SKM-ZSP Series

Protective Control Function

Explains various protective control functions for safe operation.

SRR Series

Operation Control Function by Wireless Remote Control

Explains wireless remote control functions for SRR series operation.

Auto Restart Function

Covers the auto restart function for operation recovery.

FDTC, FDUM and FDE Series

Operation Control Function by the Wired Remote Control

Explains operation control functions via the wired remote control.

Heating Overload Protection

Details heating overload protection.

Anomalous Fan Motor

Explains anomalous fan motor conditions.

Operation Control by the Indoor Control

Timer Operation

Drain Pump Abnormalities Detection

Details the detection of drain pump abnormalities.

Protective Control Function

Dew Prevention Control [Cooling]

Covers dew prevention control in cooling mode.

Cooling Overload Protective Control

Covers cooling overload protective control.

Heating Overload Protective Control

Cooling High Pressure Control

Details cooling high pressure control.

Heating Low Outdoor Temperature Protective Control

Cooling Low Outdoor Temperature Protective Control

Heating High Pressure Control

Compressor Overheat Protection

Current Safe

Current Cut

Auto Restart Function

Installing Two Air-Conditioners in the Same Room

Indoor Fan Motor Protection

Indoor Fan Motor Protection

Abnormal Temperature Sensor (Return Air/Indoor Heat Exchanger) Broken Wire/Short-Circuit Detection

Covers detection of abnormal temperature sensor conditions.

Fan Circulator Operation (RC-EX3A Only)

Indoor Unit Overload Alarm (RC-EX3A Only)

Covers indoor unit overload alarm for RC-EX3A.

Motion Sensor Control (RC-EX3A and RCN-E2 Only)

Current Cut

Outdoor Unit Failure

Explains how to handle outdoor unit failures.

Discharge Pipe Temperature Sensor Disconnection Protection Control

Discharge Pipe Temperature Sensor Disconnection Protection Control

Rotor Lock

Outdoor Fan Motor Protection

Outdoor Fan Control at Low Outdoor Temperature

Outdoor Fan Control at Overload

Outdoor Fan Control at Overload

MAINTENANCE DATA

Troubleshooting Procedure (If the Air-Conditioner Runs)

Self-Diagnosis Table

Provides a table of self-diagnosis error codes and their causes.

Service Mode (Trouble Mode Access Function)

Explains how to access and use the service mode for diagnosis.

Inspection Procedures Corresponding to Detail of Trouble

Details inspection procedures for specific troubles.

Phenomenon Observed After Short-Circuit, Wire Breakage on Sensor

Describes phenomena related to sensor faults.

Checking the Indoor Electrical Equipment

Covers inspection of indoor electrical components.

How to Make Sure of Wireless Remote Control

Inspection Procedure for Blown Fuse on the Indoor and Outdoor Unit PCB

Details inspection procedures for blown fuses on PCBs.

FDTC, FDUM and FDE Series

Diagnosing of Microcomputer Circuit

Explains how to diagnose the microcomputer circuit.

Selfdiagnosis Function

Describes the self-diagnosis function for diagnosing faults.

Troubleshooting at the Outdoor Unit

Outlines troubleshooting steps for the outdoor unit.

Check of Anomalous Operation Data with the Remote Control

Explains how to check anomalous operation data via the remote.

Inverter Checker for Diagnosis of Inverter Output

Describes using an inverter checker for diagnosis.

Troubleshooting Flow

Presents a flow chart for troubleshooting.

List of Troubles

A list of common troubles encountered.

List of Troubles

Troubleshooting Procedure (If the Air-Conditioner Does Not Run at All)

Items to Check Before Troubleshooting

Troubleshooting Procedure (If the Air-Conditioner Does Not Run at All)

Step-by-step guide for when the unit does not run.

Troubleshooting Procedure (If the Air-Conditioner Runs)

Guide for troubleshooting when the unit runs but has issues.

Self-Diagnosis Table

Service Mode (Trouble Mode Access Function)

Service Mode Display Procedure

Outlines the steps to display and use the service mode.

Operation Mode, Fan Speed Mode Information Tables

Inspection Procedures Corresponding to Detail of Trouble

Sensor Error

Inspection for sensor errors, including characteristics.

Indoor Fan Motor Error

Troubleshooting steps for indoor fan motor errors.

Limit Switch Anomaly (SRK20, 25, 35, 50, 60ZSX-W Only)

Current Safe Stop

Over Heat of Compressor

Error of Signal Transmission

Trouble of Outdoor Unit

Outdoor Fan Motor Error

Troubleshooting steps for outdoor fan motor errors.

Rotor Lock

Drain Abnormality (SRR Only)

Service Valve (Gas Side) Closed Operation

Phenomenon Observed After Short-Circuit, Wire Breakage on Sensor

Checking the Indoor Electrical Equipment

Indoor Unit PCB Check Procedure

Details the procedure for checking the indoor unit PCB.

Indoor Fan Motor Check Procedure

Explains the procedure for checking the indoor fan motor.

Indoor Unit PCB Output Check

How to Make Sure of Wireless Remote Control

Inspection Procedure for Blown Fuse on the Indoor and Outdoor Unit PCB

Outdoor Unit Inspection Points

Outdoor Fan Motor Check Procedure

Explains the procedure for checking the outdoor fan motor.

Outdoor Unit Main PCB Output Check

Fan Motor Resistance Check

Display Sequence of Error Codes or Inspection Indicator Lamps

Error Log and Reset

Resetting the Error Log

Troubleshooting Procedure

Provides a general troubleshooting procedure.

Troubleshooting at the Indoor Unit

Details troubleshooting steps for the indoor unit.

Replacement Part Related to Indoor Unit PCB’s

Lists replacement parts for indoor unit PCBs.

Instruction of How to Replace Indoor Unit Control PCB

Provides instructions for replacing the indoor unit control PCB.

Troubleshooting at the Outdoor Unit

Module of Part to Be Replaced for Outdoor Unit Control

Lists parts for outdoor unit control replacement.

Check of Anomalous Operation Data with the Remote Control

In case of RC-EX3A remote control

Explains checking anomalous data on RC-EX3A remote.

In case of RC-E5 remote control

Operation Data Can Be Checked with Remote Control Unit Operation

Explains checking operation data via RC-E5 remote.

Troubleshooting

Louver Motor Failure (FDTC and FDE Only)

Power Source System Error

INSPECT I/U

Communication Error at Initial Operation (1/3)

Communication Error at Initial Operation (2/3)

Communication Error at Initial Operation (3/3)

No Display

Remote Control Communication Circuit Error

Communication Error During Operation

Indoor Heat Exchanger Temperature Sensor Anomaly

Return Air Temperature Sensor Anomaly

Heating Overload Operation

Drain Trouble (FDTC and FDUM Only)

Excessive Number of Connected Indoor Units (More Than 17 Units) by Controlling with One Remote Control

Address Setting Error of Indoor Units

Indoor Fan Motor Anomaly

Indoor Unit Operation Check, Drain Pump Motor Check Setting Error

Indoor Fan Motor Rotation Speed Anomaly

Remote Control Temperature Sensor Anomaly

Cooling High Pressure Operation

Discharge Pipe Temperature Error

Outdoor Heat Exchanger Temperature Sensor Anomaly

Outdoor Air Temperature Sensor Anomaly

Suction Pipe Temperature Sensor Anomaly

Insufficient Refrigerant Amount or Detection of Service Valve Closure

Current Safe Stop

Current Cut (1/2)

Current Cut (2/2)

Outdoor Unit Sub PCB Communication Error

Active Filter Voltage Error

Outdoor Fan Motor Anomaly

Power Transistor Anomaly

Compressor Startup Failure

Compressor Rotor Lock Error

Diagnosis

Diagnostic steps for 'Compressor rotor lock error' error.

Countermeasure

Countermeasures for 'Compressor rotor lock error' error.