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Mitsubishi Electric PCA Series User Manual

Mitsubishi Electric PCA Series
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SERVICE MANUAL
INDOOR UNIT
CONTENTS
1. REFERENCE MANUAL
...................................
2
2. SAFETY PRECAUTION
...................................
3
3. PARTS NAMES AND FUNCTIONS
.................
5
4. SPECIFICATIONS
...........................................
10
5. NOISE CRITERION CURVES
.........................
12
6. OUTLINES AND DIMENSIONS
......................
13
7. WIRING DIAGRAM
.........................................
15
8. REFRIGERANT SYSTEM DIAGRAM
............
16
9. TROUBLESHOOTING
...................................
17
10. FUNCTION SETTING
.....................................
31
11. SPECIAL FUNCTION
.....................................
32
12. DISASSEMBLY PROCEDURE
.......................
36
COOL
DRY
AUTO
FAN
HEAT
Notes:
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WIRED REMOTE
CONTROLLER
(Option)
IR WIRELESS REMOTE
CONTROLLER (Option)
Indoor unit
[Model Name] [Service Ref.]
PCA-A24KA7
PCA-A24KA7.TH
PCA-A30KA7
PCA-A30KA7.TH
PCA-A36KA7
PCA-A36KA7.TH
PCA-A42KA7
PCA-A42KA7.TH
63L,T6Y6TE0HEAT3U03
October 2016
No. OCH638

Table of Contents

Questions and Answers:

Mitsubishi Electric PCA Series Specifications

General IconGeneral
CategoryTemperature Controller
ManufacturerMitsubishi Electric
SeriesPCA
Control OutputRelay, Voltage pulse, Current
Input TypesThermocouple, RTD, voltage, current
Control MethodPID control
Power Supply100-240V AC, 24V AC/DC
CommunicationRS-485 (Modbus RTU)
Alarm OutputsRelay

Summary

Reference Manual

Outdoor Unit Service Manual

Safety Precaution

General Safety Observations

General safety rules to observe before accessing electrical circuits.

Refrigerant Handling Cautions

Specific cautions for units utilizing R410A refrigerant, including pipe preparation and tool usage.

Parts Names and Functions

Troubleshooting

Troubleshooting Summary

Malfunction Diagnosis via Remote Controller

Self-Diagnosis Action Table

Table detailing check codes, causes, and countermeasures for self-diagnosis errors.

Troubleshooting by Inferior Phenomena

Function Setting

Unit Function Settings via Remote Controller

Special Function

Rotation and Backup Functions

Disassembly Procedure

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