TECHNICAL & SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES·······················2
2. PART NAMES AND FUNCTIONS ········3
3. SPECIFICATIONS·································7
4. DATA ···················································11
5. OUTLINES AND DIMENSIONS··········24
6. WIRING DIAGRAM·····························26
7. REFRIGERANT SYSTEM DIAGRAM ······27
8. OPERATION FLOW-CHART ··············28
9. MICROPROCESSOR CONTROL·······32
10. TROUBLESHOOTING ························54
11. 4-WAY AIR FLOW SYSTEM ···············66
12. SYSTEM CONTROL ···························72
13. DISASSEMBLY PROCEDURE ···········77
14. PARTS LIST ········································80
15. OPTIONAL PARTS ·····························85
Indoor unit
[Model names]
[Service Ref.]
PLH-3AK
PLH-3AK.UK
PLH-3AK
1
.UK
PLH-3AKH
PLH-3AKH.UK
PLH-3AKH
1
.UK
PLH-4AKS
PLH-4AKS.UK
PLH-4AKS
1
.UK
PLH-4AKHS
PLH-4AKHS.UK
PLH-4AKHS
1
.UK
PLH-5AKS
PLH-5AKS.UK
PLH-5AKS
1
.UK
PLH-5AKHS
PLH-5AKHS.UK
PLH-5AKHS
1
.UK
PLH-6AKS
PLH-6AKS.UK
PLH-6AKS
1
.UK
PLH-6AKHS
PLH-6AKHS.UK
PLH-6AKHS
1
.UK
Note:
• This manual does not cover the
following outdoor units. When ser-
vicing them, please refer to the
following service manual and this
manual in a set.
[Service Ref.]
(OC150 REVISED EDITION-A)
PUH-3VKA
2
.UK PUH-3YKA
2
.UK
PUH-4YKSA
2
.UK
PUH-5YKSA
2
.UK
PUH-6YKSA
2
.UK
(OC184)
PUH-4VKSA.UK
INDOOR UNIT
Ceiling Cassettes
Series PLH
FILTER
CHECK MODE
TEST RUN
WIRED REMOTE
CONTROLLER
• Please void OC211.
Revision:
• PLH-3AK
1
.UK, PLH-3AKH
1
.UK,
PLH-4AKS
1
.UK, PLH-4AKHS
1
.UK,
PLH-5AKS
1
.UK, PLH-5AKHS
1
.UK,
PLH-6AKS
1
.UK and
PLH-6AKHS
1
.UK are added in
REVISED EDITION-A.
• “14. PARTS LIST” has been
modified.
No. OC211
REVISED EDITION-A
SPLIT-TYPE, HEAT PUM PAIR CONDITIONERS
ON/OFF
WIRELESS REMOTE
CONTROLLER
ON/OFF
TEMP
MODEL SELECT
NOT AVAILABLE
CHECK TEST RUN
˚C
AMPM
AMPM
PLH- •AK.UK PLH- •AK
1
.UK
PLH- •AKH.UK PLH-
•AKH
1
.UK
PLH- •AKS.UK PLH-
•AKS
1
.UK
PLH- •AKHS.UK PLH-
•AKHS
1
.UK
Model name
indication
OC211-A--1.qxp 04.9.28 4:39 PM Page 1