Mitsubishi Electric Mr.Slim PLA-RP3AA Service Manual

48 pages

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TECHNICAL & SERVICE MANUAL

CONTENTS

1. SAFETY PRECAUTION·······························2

2. PART NAMES AND FUNCTIONS ···············4

3. SPECIFICATIONS········································7

4. DATA···························································11

5. OUTLINES AND DIMENSIONS ·················23

6. WIRING DIAGRAM ····································24

REFRIGERANT SYSTEM DIAGRAM

···········25

8. TROUBLESHOOTING ·······························26

9. DISASSEMBLY PROCEDURE ··················37

10. PARTS LIST ···············································40

11. OPTIONAL PARTS·····································46

Indoor unit

[Model names] [Service Ref.]

PLA-RP3AA

PLA-RP3AA.UK

PLA-RP4AA

PLA-RP4AA.UK

PLA-RP5AA

PLA-RP5AA.UK

PLA-RP6AA

PLA-RP6AA.UK

No.OC297

• Refer to the OCT04 as for control

relation.This manual does not cover

outdoor units.

When serving them, please refer to

the service manual No.OC294 and

this manual in a set.

INDOOR UNIT

Ceiling Cassettes

Series PLA

WIRED REMOTE

CONTROLLER

R410A

WIRELESS REMOTE

CONTROLLER

SPLIT-TYPE AIR CONDITIONERS

ON/OFF TEMP

MODEL SELECT

NOT AVAILABLE

CHECK

TEST RUN

˚C

AMPM

ON/OFF

CENTRALLY CONTROLLED

ERROR CODE

CLOCK

ON OFF

˚C

CHECK

CHECK MODE

FILTER

TEST RUN

FUNCTION

˚C

1Hr.

NOT AVAILABLE

STAND BY

DEFROST

TEMP.

OC297-1.qxp 03.6.9 4:24 PM Page 1

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Technical & Service Manual89 pages

Questions and Answers:

H
Heather RamseyJul 30, 2025
What to do if the inferior phenomenon is not reoccurring and is logged in Mitsubishi Electric Mr.Slim PLA-RP3AA?
- R
  robertfitzpatrickJul 31, 2025
  If the inferior phenomenon with your Mitsubishi Electric Air Conditioner is not reoccurring but is logged, consider temporary defects such as the operation of protection devices in the refrigerant circuit (including the compressor), poor wiring connections, or noise. Re-check the symptom and examine the installation environment, refrigerant amount, weather conditions when the problem occurred, and wiring. After servicing, reset the error code logs and restart the unit. This indicates there are no abnormalities related to electrical components, the controller board, or the remote controller.
M
Michaela SmithAug 13, 2025
What to do if the inferior phenomenon is not reoccurring and is not logged in Mitsubishi Electric Air Conditioner?
- L
  Leon StewartAug 13, 2025
  If the inferior phenomenon with your Mitsubishi Electric Air Conditioner is not reoccurring and is not logged, recheck the abnormal symptom. If the cause is not clear, continue operating the unit for the time being. This suggests there are no issues with electrical components, the controller board, or the remote controller.