Mitsubishi Electric MR. SLIM PKA-A18HA7 User Manual

SERVICE MANUAL
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CONTENTS
1. REFERENCE MANUAL
...................................
2
2. SAFETY PRECAUTION
...................................
3
3. PARTS NAMES AND FUNCTIONS
.................
5
4. SPECIFICATIONS
...........................................
10
5. NOISE CRITERION CURVES
.........................11
6. OUTLINES AND DIMENSIONS
...................... 12
7. WIRING DIAGRAM
.........................................13
8. REFRIGERANT SYSTEM DIAGRAM
............
14
9. TROUBLESHOOTING
....................................
15
10. FUNCTION SETTING
.....................................
29
11. SPECIAL FUNCTION
.....................................
30
12. DISASSEMBLY PROCEDURE
.......................
34
Indoor unit
[Model Name] [Service Ref.]
PARTS CATALOG (OCB637)
INDOOR UNIT
PKA-A12HA7
PKA-A12HA7
PKA-A18HA7
PKA-A18HA7
WIRED REMOTE
CONTROLLER
(Option)
IR WIRELESS REMOTE
CONTROLLER (Option)
October 2016
No. OCH637
COOL
DRY
AUTO
FAN
HEAT
63/,76<67(0+($73803

Mitsubishi Electric MR. SLIM PKA-A18HA7 Specifications

General

Type	Wall Mounted
Refrigerant	R410A
Cooling Capacity	18, 000 BTU/h
Heating Capacity	20, 000 BTU/h
Power Supply	220-240V, 50Hz
Outdoor Noise Level	50 dB

Summary

SAFETY PRECAUTION

ALWAYS OBSERVE FOR SAFETY

Essential safety guidelines for equipment operation.

CAUTIONS RELATED TO NEW REFRIGERANT

Precautions for handling new refrigerants.

PARTS NAMES AND FUNCTIONS

WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

TROUBLESHOOTING

TROUBLESHOOTING

General guide for identifying and resolving issues.

MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER

Procedure for diagnosing malfunctions via remote controller.

SELF-DIAGNOSIS ACTION TABLE

Table mapping check codes to causes and countermeasures.

TROUBLESHOOTING BY INFERIOR PHENOMENA

Troubleshooting common operational anomalies.

EMERGENCY OPERATION

HOW TO CHECK THE PARTS

Guide for inspecting and testing unit components.

FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

FUNCTION SETTING

UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER

How to configure unit functions using the remote controller.

SPECIAL FUNCTION

Rotation Function (and back-up function, 2nd stage cut-in function)

BACK-UP HEATING FUNCTION

DISASSEMBLY PROCEDURE