Page 1
SERVICE MANUAL
AH-PS19
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 SPECIFICATIONS
[1] SPECIFICATIONS ......................................... 1-1
[2] EXTERNAL DIMENTIONS............................. 1-3
[3] WIRING DIAGRAMS...................................... 1-4
[4] ELECTRICAL PARTS .................................... 1-6
CHAPTER 2. EXPLANATION OF CIRCUIT AND OPERATION
[1] MICROCOMPUTER CONTROL SYSTEM........ 2-1
[2] FUNCTIONS .................................................. 2-5
CHAPTER 3. TROUBLESHOOTING GUIDE
[1] SELF-DIAGNOSIS FUNCTION AND DIS-
PLAY MODE .................................................. 3-1
[2] CONTROL CIRCUIT ...................................... 3-2
CHAPTER 4. REFRIGERATION CYCLE
[1] REFRIGER
ATION CYCLE ............................4-1
[2] REFRIGERANT PIPE INSTALLATION
WORKS .........................................................4-1
[3] PERFORMANCE CURVES........................... 4-2
CHAPTER 5. DISASSEMBLING PROCEDURE
[1] INDOOR UNIT...............................................5-1
[2] OUTDOOR UNIT(18000 BTU CLASS) .........5-5
[3] OUTDOOR UNIT(24000 BTU CLASS) .........5-7
Parts Guide
TopPage
CONTENTS
S3214A3AHAP8LMBT
SPLIT TYPE
ROOM AIR CONDITIONER
OUTDOOR UNIT
AU-PS19
AU-PS24
MODEL
INDOOR UNIT
AH-PS19
AH-PS24
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.
Page 2
AH-PS19
1– 1
2. AH-PS19 , AU-PS19
Note: The condition of star ( ) marked item are ‘TIS2134-2545’.
ITEMS
TINUROODTUOTINUROODNI
-PS19UA-PS19HA
Cooling capacity
2.5Wk
Moisture removal
8.1h/sretiL
Electrical data
elgniS-esahP
05zHycneuqerfdetaR
022VegatlovdetaR
Rated current
7.7A
Rated input
609.1
Wk
Rated factor
89%
epytyratordelaesyllacitemreHepyTrosserpmoC
R433VU+5ASI55ledoM
]TNELAVIUQEroDSG4OSINUS[cc560egrahcliO
epytebutd
evoorGdnanifrevuoLrotaropavEmetsystnaregirfeR
epytebutdevoorGdnanifrevuoLresnednoC
ebutyrallipaClortnoC
g154022Remulo
vtnaregirfeR
A/Nmetsysecl-eD
Noise level
(at cooling)
4564)A(BdhgiH
-44)A(BdwoL
-73)A(BdtfoS
Fan system
Drive Direct drive
Air flow quantity
(at cooling)
Turbo
m
3
/min.
9.937.81
High
m
3
/min.
18.2
Low
m
3
/min.
16.4
Soft
m
3
/min.
13.7
nafrelleporPnafwolfssorCnaF
Connections
epyteralFgnilpuoctnaregirfeR
"4/1,"8/5diuqiL,saGezisebuttnaregirfeR
Drain piping mm O.D 20
Others
ro
tcetorplanretnI:rosserpmoCecivedytefaS
Fan motors: Thermal protector (Internal)
Fuse, Micro computer control
)elbahsaW(tenenelyporpyloPsretlifriA
0980401mmhtdiWsnoisnemidt
eN
546523mmthgieH
092222mmhtpeD
4541gkthgiewteN
Page 3
AH-PS19
1– 2
2. AH-PS24 , AU-PS24
Note: The condition of star ( ) marked item are ‘TIS2134-2545’.
ITEMS
TINUROODTUOTINUROODNI
U-PS24AH-PS24A
Cooling capacity
5.6Wk
Moisture removal
4.2h/sretiL
Electrical data
elgniS-esahP
05zHycneuqerfdetaR
022VegatlovdetaR
Rated current
9.6A
Rated input
2.012Wk
Rated factor
8
9%
epytyratordelaesyllacitemreHepyTrosserpmoC
QP390PAAledoM
]TNELAVIUQEroDSG4OSINUS[cc007egrahcliO
epytebutdevoo
rGdnanifrevuoLrotaropavEmetsystnaregirfeR
epytebutdevoorGdnanifrevuoLresnednoC
ebutyrallipaClortnoC
g054
122Remulov
tnaregirfeR
A/Nmetsysecl-eD
Noise level
(at cooling)
6564)A(BdhgiH
-44)A(BdwoL
-73)A(BdtfoS
Fan system
Drive Direct drive
Air flow quantity
(at cooling)
Turbo
m
3
/min.
507.81
High
m
3
/min.
18.2
Low
m
3
/min.
16.4
Soft
m
3
/min.
13.7
nafrelleporPnafwolfssorCnaF
Connections
epyteralFgnilpuoctnaregirfeR
"4/1,"8/5diuqiL,saGezisebuttnaregirfeR
Drain piping mm O.D 20
Others
ro
tcetorplanretnI:rosserpmoCecivedytefaS
Fan motors: Thermal protector (Internal)
Fuse, Micro computer control
)elbahsaW(tenenelyporpyloPsretlifriA
0080401mmhtdiWsnoisnemidt
eN
890523mmthgieH
320222mmhtpeD
5541gkthgiewteN
Page 4
AH-PS19
1– 3
[2] EXTERNAL DIMENTIONS
1. Indoor unit
2. Outdoor unit (AU-PS19)
222
1100
Power supply cord
(AH-PS19 only)
[Length unit : mm]
325
1040
Remote controller
58
18.5
22
140
INVERTERAIR CONDITIONER
TEMP.
MODE
FAN
TIMER
570
645
202
122
320
342
09209833
30
172
25
62
46.3
10.5
ø4.5
Page 5
AH-PS19
1– 4
3. Outdoor unit (AU-PS24)
[3] WIRING DIAGRAMS
1. Indoor unit
1.1. AH-PS19
CLUSTER GENERATOR,CN6
LOUVER MOTOR(VERTICAL),CN3
USE
NONE NONE
NONE
AH-AP18KSY
AH-AP18KMV
AH-A18KEY
AH-A18KEV
Page 6
AH-PS19
1– 5
1.2. AH-PS24
2. Outdoor unit
2.1. AU-PS19
2.2. AU-PS24
CLUSTER GENERATOR,CN6
LOUVER MOTOR(VERTICAL),CN3
USE
NONE NONE
NONE
AH-AP24KSY
AH-AP24KMV
AH-A24KEV
CC559
CC547
Page 7
AH-PS19
1– 6
[4] ELECTRICAL PARTS
1. Indoor unit
2. Outdoor unit
snoitacificepSsmetIemaNtraP.oNtraP
AH-PS19 AH-PS24
1 Terminal Board Rating 300V 25A
3 Relay-1
(RY1)
Rating AC250V 20A
Coil Volt.; 12V
—
4 Relay-2
(RY4)
Rating
—
AC250V 5A
Coil Volt.; 12V
5 Printed Wiring Board Material Paper Base Phenolic Resin (UL 94V-0)
7 Fan motor Rating DC 340V, 32W, 8-Poles
Type MLB420
8 Power Supply Cord Rating
3G 1.5mm
2
—
—F-VV50HepyT
9 Louver Motor Rating DC12V 250
Type 35BYJ46-509
Part
No.
snoitacificepSsmetIemaNtraP
AU-PS19 AU-PS24
A52V003gnitaRdraoBlanimreT1
3V054gnitaRroticapaCrotomnaF2
3V054μF
53V004gnitaRroticapaCgninnuR3 50V004
4 Compessor Rating AC220 - 240V 50Hz 1601W AC220 - 240V 50Hz 2471W
QP390PAAISA5+UV334R05epyT
LANRETNIrotcet
orP
5 Fan motor Rating 220 - 240VAC 50Hz 46W 6-Pole 220 - 240VAC 50Hz 48W 6-Pole
824BLM3284BLMepyT
Thermal protector
(Internal)
Cut off 135°C±5° C
6 Relay 4 Rating
—
AC250V 30A
Coil volt: 200 -240V
μF
μF
μF
Page 8
AH-PS19
2– 1
AHAP18KSY
Service Manual
CHAPTER 2. EXPLANATION OF CIRCUIT AND OPERATION
[1] MICROCOMPUTER CONTROL SYSTEM
1. Electronic control circuit diagram
1.1. AH-PS19
Page 9
AH-PS19
2– 2
1.2. AH-PS24
Page 10
AH-PS19
2– 3
2. Printed wiring diagram
2.1. AH--PS19
TO EVAPORATOR AND TERMINAL BOARD "E"
TO TERMINAL BOARD
"N"
FROM
POWER SUPPLY COAD
"BROWN"
FROM
TERMINAL BOARD
"1" "BLACK"
FROM FAN MOTOR
FROM
CLUSTER
GENERATOR
[AH-AP18KSY/ KMV]
FROM THERMISTOR
FROM LOUVER
MOTOR
FROM TERMINAL BOARD
THERMAL FUSE RY1 (CN12)
Page 11
AH-PS19
2– 4
2.2. AH-PS24
TO EVAPORATOR AND TERMINAL BOARD TOP "E"
TO TERMINAL BOARD
TOP "N"
FROM FAN MOTOR
FROM
CLUSTER
GENERATOR
FROM THERMISTOR
FROM LOUVER
MOTOR
FROM TERMINAL BOARD TOP
FROM TERMINAL BOARD BOTTOM
TO TERMINAL BOARD TOP "1"
TO TERMINAL BOARD TOP "2"
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