Service manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. TECHNICAL CHANGE ·············································2
2. FEATURES ·······························································2
3. PART NAMES AND FUNCTIONS ····························5
4. SPECIFICATIONS·····················································7
5. DATA ·········································································8
6. OUTLINES AND DIMENSIONS······························19
7. REFRIGERANT SYSTEM DIAGRAM ····················21
8. WIRING DIAGRAM·················································22
9. OPERATION FLOW-CHART··································23
10. MICROPROCESSOR CONTROL···························27
11. TROUBLESHOOTING ············································44
12. SYSTEM CONTROL ···············································50
13. DISASSEMBLY PROCEDURE·······························55
14. PARTS LIST····························································58
15. OPTIONAL PARTS ·················································61
TM
PKH18FK3
PKH24FK3
PKH30FK3
PKH36FK3
No. OC273
REVISED EDITION-A
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Wall Mounted
Series PKH
[Models]
Indoor unit
Remote controller
FILTER
CHECK MODE
TEST RUN
TIMER OFF TIMER
CHECK SET TEMP.
CLOCK AUTO AUTO
START STOP
SWING
FAN
SPEED
AUTO
RETURN
Revision:
●The wrong descriptions in REFRIGERANT
SYSTEM DIAGRAM have been modified.
(Page 21.)
●The wrong descriptions in WIRING DIAGRAM
have been modified.
(Page 22.)
●Restrictor valve and capillary tube have been
added to "Specifications" of heat exchanger.
(Page 58.)
●Please void OC273.
OC273-A-1.qxp 03.11.25 8:59 AM Page 1