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Mitsubishi Electric Mr.SLIM PKA-A12HA4 User Manual

Mitsubishi Electric Mr.SLIM PKA-A12HA4
36 pages
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SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
NOTE:
• This manual describes
only service data of the
indoor units.
• RoHS compliant products
have <G> mark on the
spec name plate.
CONTENTS
1. REFERENCE MANUAL
...................................
2
2. SAFETY PRECAUTION
...................................
3
3. PART NAMES AND FUNCTIONS
...................
4
4. SPECIFICATIONS
............................................
7
5. NOISE CRITERION CURVES
..........................
8
6. OUTLINES AND DIMENSIONS
.......................
9
7. WIRING DIAGRAM
.........................................10
8. REFRIGERANT SYSTEM DIAGRAM
............
11
9. TROUBLESHOOTING
....................................
12
10. SPECIAL FUNCTION
.....................................
26
11. DISASSEMBLY PROCEDURE
.......................
29
Indoor unit
[Model names] [Service Ref.]
PARTS CATALOG (OCB483)
No. OCH483
November 2010
INDOOR UNIT
PKA-A12HA4
PKA-A12HA4
PKA-A18HA4
PKA-A18HA4
ON/OFF
TEMP.
COOL
DRY
AUTO
FAN
HEAT
WIRED REMOTE
CONTROLLER
(Option)
IR WIRELESS REMOTE
CONTROLLER (Option)
33223
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Mitsubishi Electric Mr.SLIM PKA-A12HA4 Specifications

General IconGeneral
Power Supply220-240 V, 50 Hz
RefrigerantR410A
Indoor Unit Weight9 kg
TypeSplit System
Heating Capacity4.0 kW
Outdoor Unit Dimensions (W x H x D)780 x 540 x 269 mm
Operating Temperature Range (Heating)-10 to 24 °C

Summary

Safety Precaution

2-1. Always Observe for Safety

Basic safety instruction to disconnect power before access.

2-2. Cautions Related to New Refrigerant

Guidelines for using R410A refrigerant, tools, and handling precautions.

Part Names and Functions

Specifications

PKA-A12HA4 Specifications

Technical specifications for the PKA-A12HA4 indoor unit model.

PKA-A18HA4 Specifications

Technical specifications for the PKA-A18HA4 indoor unit model.

Outlines and Dimensions

Dimensions for PKA-A12HA4 and PKA-A18HA4

Provides detailed physical dimensions and mounting hole specifications for the indoor units.

Wiring Diagram

Wiring Diagram for PKA-A12HA4 and PKA-A18HA4

Illustrates the electrical connections and component layout for the indoor units.

Refrigerant System Diagram

Refrigerant Flow for PKA-A12HA4 and PKA-A18HA4

Shows the refrigerant flow and sensor locations within the indoor unit's system.

Troubleshooting

9-1. General Troubleshooting Overview

Summarizes error code displays and corresponding actions for troubleshooting unit issues.

9-3. Self-Diagnosis Action Table

Provides detailed error codes, detection methods, causes, and countermeasures for unit malfunctions.

Thermistor and Sensor Errors (P1, P2, P8, P9)

Covers errors related to room, pipe, and condenser/evaporator thermistors.

Protection and Operation Errors (P6, PA)

Covers errors related to protection operations and forced compressor stops.

Communication and Board Errors (E0-E7, Fb, E1-E2)

Covers errors related to remote controller and unit communication, and board failures.

Disassembly Procedure

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