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
TopPage
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.
