Mitsubishi Electric PCA-RP71HAQ User Manual

SERVICE MANUAL
No. OCH492
INDOOR UNIT
REMOTE CONTROLLER
(Option)
[Service Ref.]
PCA-RP71HAQ
PCA-RP125HAQ
CONTENTS
1. REFERENCE MANUAL
...................................
2
2. SAFETY PRECAUTION
...................................
3
3. PART NAMES AND FUNCTIONS
....................
7
4. SPECIFICATIONS
............................................
9
5. NOISE CRITERION CURVES
........................
10
6. OUTLINES AND DIMENSIONS
......................
11
7. WIRING DIAGRAM
.............................................
13
8. REFRIGERANT SYSTEM DIAGRAM
.............
14
9. TROUBLESHOOTING
....................................
15
10. SPECIAL FUNCTION
.....................................
26
11. DISASSEMBLY PROCEDURE
.......................
29
ON/OFF
TEMP.
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
December 2010
Model name
indication
Note:
• This manual describes only
service data of the indoor units.
• RoHS compliant products have
<G> mark on the spec name
plate.
• For servicing of RoHS com-
pliant products, refer to the
RoHS Parts List.
Indoor unit
[Model names]
PCA-RP71HAQ
PCA-RP125HAQ
PARTS CATALOG (OCB492)

Mitsubishi Electric PCA-RP71HAQ Specifications

General

Brand	Mitsubishi Electric
Model	PCA-RP71HAQ
Category	Air Conditioner
Language	English

Summary

Reference Manual

Outdoor Unit Service Manual References

Lists service manuals for compatible outdoor unit models.

Technical Data Book References

References technical data books for different outdoor unit series.

Safety Precautions

General Safety Guidelines

Essential safety rules to follow before accessing electrical terminals, such as disconnecting power.

Refrigerant Handling Cautions

Critical precautions for using refrigerant R407C, including piping, oil, and charging methods.

Part Names and Functions

Indoor Unit Components

Identifies key parts of the indoor unit, including air outlet, intake, and guide vanes.

Remote Controller Operation

Details the functions and buttons of the optional wired remote controller.

Remote Controller Display

Explains the various indicators and displays on the remote controller screen during operation.

Specifications

PCA-RP71HAQ Model Specifications

Technical data for the PCA-RP71HAQ model, including electrical and performance details.

PCA-RP125HAQ Model Specifications

Technical data for the PCA-RP125HAQ model, including electrical and performance details.

Noise Criterion Curves

PCA-RP71HAQ Noise Levels

Noise criterion curves for the PCA-RP71HAQ model across various frequency bands.

PCA-RP125HAQ Noise Levels

Noise criterion curves for the PCA-RP125HAQ model across various frequency bands.

Outlines and Dimensions

PCA-RP71HAQ Dimensions and Layout

Detailed physical dimensions and component layout for the PCA-RP71HAQ model.

PCA-RP125HAQ Dimensions and Layout

Detailed physical dimensions and component layout for the PCA-RP125HAQ model.

Wiring Diagram

PCA Model Wiring Schematics

Electrical wiring diagrams for PCA-RP71HAQ and PCA-RP125HAQ indoor units.

Refrigerant System Diagram

Refrigerant Flow Overview

Diagram illustrating refrigerant flow and component connections for cooling and heating modes.

Troubleshooting

Troubleshooting Summary

Overview of error code display, self-diagnosis, and general troubleshooting actions.

Self-Diagnosis Action Table

Links error codes to detected issues, causes, and specific corrective actions for troubleshooting.

Troubleshooting by Phenomena

Addresses specific operational issues and their corresponding causes and remedies.

Wired Remote/Indoor Unit Failure Handling

Procedures for handling failures in the wired remote controller or indoor unit microprocessor.

Component Testing Procedures

Step-by-step guide on how to test key internal components using a tester.

Test Point Diagrams

Visual guide to test points on the power board for diagnostic purposes.

Dip Switch and Jumper Wire Functions

Explanation of how DIP switches and jumper wires control unit settings and functions.

Special Functions

Rotation and Backup Functions

Details on alternating operation between units and backup functionality for enhanced reliability.

Setting Rotation and Cut-in Functions

Instructions on configuring rotation and 2nd stage cut-in functions via the wired remote controller.

Disassembly Procedure

Removing the Oil Filter

Step-by-step instructions for removing the oil filter from the indoor unit.

Removing the Terminal Block Box Cover

Guide to safely remove the cover protecting the terminal block connections.

Removing the Control Box

Procedure for detaching the main control box containing electronic components.

Removing the Fan Motor

Detailed steps for removing the fan motor and its associated components.

Removing Fan Motor and Sirocco Fan

Instructions for removing the fan motor along with the sirocco fan assembly.

Removing the Pipe Temperature Thermistor

Steps to detach the pipe temperature thermistor sensor.

Removing the Under Panel

Guide for safely removing the bottom panel of the unit.

Removing the Drain Pan

Procedure for detaching the drain pan, which collects condensation.

Removing the Guide Vane

Instructions for removing the adjustable guide vanes that direct airflow.

Removing the Vane

Steps to detach the air direction vane for access or replacement.

Removing the Heat Exchanger

Procedure for removing the heat exchanger unit for maintenance or replacement.