SERVICE MANUAL
S9928AYZP40KRT
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
CHAPTER 1. PRODUCT SPECIFICATION
[1] SPECIFICATION............................................ 1-1
[2] EXTERNAL DIMENSION............................... 1-2
[3] WIRING DIAGRM .......................................... 1-3
[4] ELECTRICAL PARTS .................................... 1-4
CHAPTER 2. EXPLAMATION OF CIRCUIT AND OP-
ERATION
[1] BLOCK DIAGRAMS....................................... 2-1
[2] MICROCOMPUTER CONTROL SYSTEM........ 2-3
[3] FUNCTION..................................................... 2-7
CHAPTER 3. FUNCTION AND OPERATION OF PRO-
TECTIVE PROCEDURES
[1] PROTECTION DEVICE FUNCTIONS AND
OPERATIONS................................................ 3-1
[2] AIR CONDITIONER OPERATION IN
THERMISTOR ERROR ................................. 3-3
[3] THERMISTOR TEMPERATURE CHAR-
ACTERISTICS ............................................... 3-5
[4] HOW TO OPERATE THE OUTDOOR
UNIT INDEPENDENTLY................................ 3-5
[5] GENERAL TROUBLESHOOTING CHART........ 3-6
[6] MALFUNCTION (PARTS) CHECK METH-
OD .................................................................3-7
[7] OUTDOOR UNIT CHECK METHOD...........3-10
[8] TROUBLESHOOTING GUIDE ....................3-13
[9] CHART ........................................................3-14
CHAPTER 4. REFRIGERATION CYCLE
[1] SCHEMATIC DIAGRAM ................................4-1
[2] STANDARD CONDITION..............................4-1
[3] TEMPERATURE AT EACH PART AND
PRESSURE IN 3-WAY VALVE ......................4-1
[4] PERFORMANCE CURVES...........................4-1
CHAPTER 5. DISASSEMBLING PROCEDURE
[1] INDOOR UNIT...............................................5-1
[2] HOW TO REMOVE PLASMACLUSTER
UNIT(For the models with PLASMACLUS-
TER) ..............................................................5-4
[3] DISASSEMBLY OF OUTDOOR UNIT...........5-5
Parts Guide
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CONTENTS
AYZP40KR
SPLIT TYPE
AIR-TO-AIR HEAT PUMP
OUTDOOR UNIT
AE-Z40KR
MODEL
INDOOR UNIT
AY-ZP40KR
In the interests of user-safety (Required by safety regulations in some countries) the set should
be restored to its original condition and only parts identical to those specified should be used.
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