Sharp AY-XPM12FR Service manual Download

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SERVICE MANUAL
S6721AEXM24HRT
MULTI SPLIT TYPE
ROOM AIR CONDITIONERS
OUTDOOR UNIT
MODELS
AE-XM24HR
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.
CONTENTS
CHAPTER 1. SPECIFICATION
[1] SPECIFICATION............................................ 1-1
[2] EXTERNAL DIMENSION............................... 1-2
[3] CAPACITY TABLE ......................................... 1-2
[4] ELECTRICAL PARTS .................................... 1-3
[5] WIRING DIAGRAMS...................................... 1-4
CHAPTER 4. REFRIGERATION CYCLE
[1] REFRIGERATION SYCLE.............................4-1
[2] PERFORMANCE CURVES...........................4-3
CHAPTER 2. EXPLANATION OF CIRCUIT AND OPERATION
[1] BLOCK DIAGARM ......................................... 2-1
[2] FUNCTION..................................................... 2-2
Parts Guide
CHAPTER 5. DISASSEMBLING PROCEDURE
[1] OUTDOOR UNIT ...........................................5-1
CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
[1] PROTECTIVE FUNCTIONS AND OPERATIONS ............................................................ 3-1
[2] TROUBLESHOOTING GUIDE....................... 3-3
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.
AEXM24HR
CHAPTER 1. SPECIFICATION
AEXM24HR
Service Manual
[1] SPECIFICATION
MODEL
ITEMS
Cooling capacity
4-INDOOR OPERTION
Heating capacity
4-INDOOR OPERTION
Moisture removal (at cooling)✩
Electrical data
Phase
Rated frequency
Rated voltage
Rated current
Rated input ✩
(Min. - Max.)
Power factor ✩
Compressor
Refrigerant system
Noise level (at cooling)
kW
7K&7K&7K&7K
kW
7K&7K&7K&7K
Liters/h
Hz
V
Cool
A
Heat
A
Cool
W
Heat
W
Cool
%
Heat
%
Type
Model
Oil charge
Evaporator
Condenser
Control
Name of refrirerant
Refrigerant volume
dB(A)
Hi/Low/Soft
Fan system
Drive
Air flow quantity
( at cooling)
Fan
Connections
Refrigerant coupling
Refrigerant tube size Gas, Liquid
Maximum length (per unit)
Maximum length(total)
Maximum chargeless length
Maximum height difference
Drain joint
Others
Safety device
Net dimensions
Net weight
INDOOR UNIT
AY-XPM7FR/9FR/
X12FR
OUTDOOR UNIT
AE-XM24HR
7.0(3.0–8.2)*
8.0(3.0–9.2)*
1.0X2&0.8*
Single
50
230V
10.0(2.7– 13.6)*
9.2(2.6 – 11.7)*
2180 (600– 2980)*
2000 (560 – 2560)*
95
95
Hermetically sealed DC twin rotary
DA150A1F-20F
Ester oil VG74
Slit Fin and Grooved tube type
Corrugate Fin and Grooved tube type
Expansion valve
R410A
2300g
High/Med/Low
7FR:37/34/28
49
9FR:39/36/28
12FR:40/37/29
Direct drive
.
m3/min.
m
m
m
m
mm
Hight/Med/Low
7FR :8.0/7.4/5.4
9FR :8.6/7.9/5.6
12FR :9.8/8.5/6.9
Cross flow fan
43
Propeller fan
Flare type
3/8”,1/4”
20
50
40
10
O.Dφ18
Compressor: Thermistor
Fan motors: Thermal fuse(indoor unit).
Thermal protecor(Out door unit)
Fuse, Micro computer control
Anti-mold polypropyene net of injection type
(Wasshable)
Width
mm
790
940
Heigh
mm
278
800
Depth
mm
198
357
kg
10
64
NOTE: The condition of star "✩" marked item are ‘ISO5151’: *:Representative connection
1–1
AEXM24HR
[2] EXTERNAL DIMENSION
150
150
590
361
383
75
51.3
16
940
890
50
37
320
Figure OUTDOOR UNIT ˴
[3] CAPACITY TABLE
1. Recommended Combination
Outdoor
Units
AE-XM24HR
Indoor Units
7:AY-XPM7FR,GS-XPM7FR
9:AY-XPM9FR,GS-XPM9FR,GS-XPM9FGR
12:AY-XPM12FR,GS-XPM12FR,GS-XPM12FGR
9
9
9
9
12
9
7
7
9
9
9
7
12
7
7
7
9
9
7
7
9
7
7
7
7
7
7
7
1–2
52
52
284
389
52
151
26
210
800
52
26
AEXM24HR
2. COOLING CAPACITY TABLE
Operating
Status
4Room
3Room
2Room
1Room
Combination of Indoor Units
Cooling Capacity (kW)
A
B
C
D
A
B
C
D
09
12
09
12
09
09
07
09
12
12
09
09
07
12
12
09
09
07
12
09
07
09
09
09
07
09
07
07
09
09
07
09
07
07
09
07
09
07
07
OFF
OFF
OFF
09
07
09
07
07
07
07
09
07
07
07
07
07
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
09
07
07
07
07
07
07
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1.75
2.40
1.85
2.55
1.97
2.10
1.75
2.27
2.91
3.14
2.45
2.50
1.97
3.20
3.35
2.50
2.59
2.00
3.4
2.6
2.0
1.75
1.80
1.85
1.48
1.97
1.63
1.75
2.27
2.19
1.83
2.45
1.95
1.97
2.40
1.95
2.50
2.01
2.00
OFF
OFF
OFF
1.75
1.40
1.85
1.48
1.53
1.63
1.75
2.27
1.70
1.83
1.90
1.95
1.97
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1.75
1.40
1.44
1.48
1.53
1.63
1.75
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RATING (Min.Max.)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
7.0 (3.0-8.2)
6.8 (2.7-7.4)
6.8 (2.7-7.4)
6.8 (2.7-7.4)
6.8 (2.7-7.4)
6.8 (2.7-7.4)
5.9 (2.7-7.3)
5.6 (2.0-6.8)
5.3 (2.0-6.7)
5.0 (2.0-6.3)
4.6 (2.6-5.9)
4.0 (2.6-5.3)
3.4 (1.6-4.0)
2.6 (16-3.3)
2.0 (1.6-2.7)
Running Current
(A)
RATING (Min.Max.)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.0 (2.7-13.6)
10.1 (2.4-13.3)
10.1 (2.4-13.3)
10.1 (2.4-13.3)
10.1 (2.4-13.3)
9.2 (2.4-13.3)
8.0 (2.4-12.6)
8.3 (2.0-12.4)
7.3 (2.0-12.0)
6.4 (2.0-11.0)
5.6 (2.0-9.2)
4.8 (2.0-7.8)
4.1 (1.8-6.0)
3.0 (1.8-4.3)
2.3 (1.8-3.2)
Power Consumption
(W)
Running Current
(A)
RATING (Min.Max.)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
9.2 (2.6-11.7)
11.4 (2.4-12.1)
11.4 (2.4-12.1)
11.4 (2.4-12.1)
11.4 (2.4-12.1)
11.4 (2.4-12.1)
10.0 (2.4-12.1)
11.0 (2.1-11.9)
10.9 (2.1-11.9)
9.4 (2.1-11.9)
8.7 (2.1-11.9)
7.2 (2.1-10.5)
8.0 (1.8-11.0)
5.2 (1.8-9.4)
3.7 (1.8-6.6)
Power Consumption
(W)
RATING (Min.-Max.)
2180 (600-2980)
2180 (600-2980)
2180 (600-2980)
2180 (600-2980)
2180 (600-2980)
2180 (600-2980)
2180 (600-2980)
2200 (530-2900)
2200 (530-2900)
2200 (530-2900)
2200 (530-2900)
2200 (530-2900)
1750 (530-2760)
1820 (430-2700)
1590 (430-2630)
1400 (430-2400)
1230 (430-2000)
1040 (430-1700)
900 (400-1320)
650 (400-930)
500 (400-700)
3. HEATING CAPACITY TABLE
Operating
Status
4Room
3Room
2Room
1Room
Combination of Indoor Units
Heating Capacity (kW)
A
B
C
D
A
B
C
D
09
12
09
12
09
09
07
09
12
12
09
09
07
12
12
09
09
07
12
09
07
09
09
09
07
09
07
07
09
09
07
09
07
07
09
07
09
07
07
OFF
OFF
OFF
09
07
09
07
07
07
07
09
07
07
07
07
07
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
09
07
07
07
07
07
07
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
2.00
2.74
2.12
2.91
2.25
2.40
2.00
2.6
3.3
3.6
2.8
3.1
2.4
4.2
4.5
3.2
3.4
2.7
3.8
2.9
2.4
2.00
2.06
2.12
1.70
2.25
1.87
2.00
2.6
2.5
2.1
2.8
2.4
2.4
3.1
2.6
3.2
2.7
2.7
OFF
OFF
OFF
2.00
1.60
2.12
1.70
1.75
1.87
2.00
2.6
2.0
2.1
2.2
2.4
2.4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
2.00
1.60
1.65
1.70
1.75
1.87
2.00
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
RATING (Min.Max.)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
8.0 (3.0-9.2)
7.8 (2.4-8.8)
7.8 (2.4-8.8)
7.8 (2.4-8.8)
7.8 (2.4-8.8)
7.8 (2.4-8.8)
7.1 (2.4-8.8)
7.3 (1.8-7.5)
7.1 (1.8-7.5)
6.4 (1.8-7.5)
6.1 (1.8-7.5)
5.3 (1.8-7.3)
3.8 (1.1-5.2)
2.9 (1.1-4.0)
2.4 (1.1-3.4)
[4] ELECTRICAL PARTS
Compressor
Fuse 1,101
Fuse 3,4
Fuse 5
Fuse 6
DA220A2F-20L
—
—
—
—
Hermetically sealed DC twin rotary
QFS-GA065JBZZ(20A,250V)
QFS-GA062JBZZ(3.15A,250V)
QFS-GA063JBZZ(2A,250V)
QFS-GA064JBZZ(1A,250V)
1–3
RATING (Min.-Max.)
2000 (560-2560)
2000 (560-2560)
2000 (560-2560)
2000 (560-2560)
2000 (560-2560)
2000 (560-2560)
2000 (560-2560)
2500 (520-2650)
2500 (520-2650)
2500 (520-2650)
2500 (520-2650)
2500 (520-2650)
2180 (520-2650)
2400 (450-2600)
2380 (450-2600)
2050 (450-2600)
1900 (450-2600)
1580 (450-2300)
1750 (400-2400)
1130 (400-2050)
800 (400-1450)
AEXM24HR
[5] WIRING DIAGRAMS
1. FOR MODEL AEXM24HR
CC373
1–4
from DC FAN MOTOR
from 4-WAY VALVE
from IPM PWB
1–5
from THERMISTOR
COMP.TEMP.
COMP.T
HEAT EXCHANGER TEMP
OUT DOOR TEMP.
SUCTION TEMP.
from EXPANSION VALVE A
from EXPANSION VALVE B
from EXPANSION VALVE C
from EXPANSION VALVE D
from THERMISTOR
(SUCTION)
Figure CONTROL P.W.B and DISPLAY P.W.B
from IPM PWB
"U", "V", "W"
THERMISTOR
from DIODE BRIDGE
from HEAT-SINK
DB1 "~"
from
TERMINAL BOARD
from CONTROL BOX
QPWBFB630JBZZ
from
SHORT CIRCUIT
CONNECTOR
from
TERMINAL BOARD
from
TERMINAL BOARD
from
TERMINAL BOARD
AEXM24HR
2. PRINTED WIRING BOARD
AEXM24HR
3. PRINTED WIRING BOARD
from CONTROL PWB CN14
from ELECTROLYTIC CAPACITOR C10(+)
from ELECTROLYTIC
CAPACITOR C10(-)
from COMPRESSOR TERMINAL
W "ORANGE"
from COMPRESSOR TERMINAL
U "RED"
from COMPRESSOR TERMINAL
V "WHITE"
from CONTROL PWB BCN1
figure IPM P.W.B
1–6
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㧜㧚㧝Ǵ
㧞㧡㨂
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㧝 㧞 㧠 㧢 㧯㧺㧞
㧾㧡㧣㧘㧾㧡㧥㧘㧾㧢㧝㧦
㧝㧛㧞㨃˴㧝㧥㧢㨗㧲
㧾㧡㧝
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㧯㧟㧣 㧯㧟㧤 㧯㧟㧥 㧯㧠㧜
㧾㧡㧞㧾㧡㧟㧾㧡㧠
㧞㧡㨂 㧯㧟㧤㧘㧯㧟㧥㧘㧯㧠㧜㧦 㧾㧡㧞㧘㧾㧡㧟㧘㧾㧡㧠㧦
㧰㧞㧞
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㧝㧜
㧗㧝㧝
㧙
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㧙
㧣 㧵㧯㧡
㧢
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㧟
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㧝㧤㨗㧲㨆
㧝
㧟
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㧤 㧣 㧢 㧡 㧠 㧟 㧞 㧝
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㨀
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㧼
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㨒㨘㨍㨟㨔
㨣㨞㨕㨠㨑㨞
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㧠㧝㧠㧞㧠㧟㧠㧠㧠㧡㧠㧢㧠㧣㧠㧤㧠㧥㧡㧜㧡㧝㧡㧞㧡㧟㧡㧠㧡㧡㧡㧢㧡㧣㧡㧤㧡㧥㧢㧜㧢㧝㧢㧞㧢㧟㧢㧠
㧾㧞㧞㧡
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㧞
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㧝㧟㧜㨗
㧯㧺㧝㧠 㧠 㧟 㧞 㧝
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㨀㧺
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㧯㧺㧝㧝㧠 㧠 㧟 㧞 㧝
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㧝㧹
㧾㧞㧞㧞㧙㧞㧞㧠
㧞㧠㧞㧟㧞㧞㧞
㧞㧝㧞㧜㧝㧥㧝㧤㧝㧣㧝㧢㧝㧡㧝㧠㧝㧟㧝㧞㧝㧝㧝㧜㧥
㧦㧝㧜㨗
㧞㧡
㧗
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㧡㧗
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㧟㧠㧚㧤㨗㧲
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㧡㧜㨂
㧝Ǵ
㧵㧯㧞㧯㧠㧣
㧾㧢㧤
㧞㧣㧜 㧞㧡㨂
㧜㧚㧝Ǵ
㧢 㧡 㧠 㧟 㧞 㧝 㧡㨂
㨐
㨏
㨎
㨍
㧽
㧮㧸㨁㧱
㧗
㧝㧣
㧡㧜㨂㧝㧜㧜㧜㨜㧲
㧯㧝㧝㧥 㧝㧢
㧾㧝㧜㧠
㧝㧛㧠㨃
㧝㧟㧜㨗
㧵㧯㧡 㧯㧡㧤 㧞㧡㨂 㧾㧟㧤
㧜㧚㧝Ǵ㧲 㧝㧜㨗
㧯㧡㧢 㧯㧡㧣
㧯㧡㧥
㧽㧠
㧾㧟㧝
㧾㧟㧠 㧞㧡㨂 㧞㧡㨂
㧡㧜㨂
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㧜㧚㧝Ǵ㧲
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㧝㧛㧠㨃 㧝㧛㧠㨃
㧜㧚㧜㧝Ǵ㧲
㧠㧚㧢㧠㨗㧲㧥㧚㧡㧟㨗㧲
㧯㧥㧤 㧾㧞㧞㧜㧯㧠㧢
㧾
㧵㨛
㧼
㧞㧞
㧼
㧲㨁㧿㧱㧝㧜㧝㧜㧚㧟㧟Ǵ㧲㧜㧚㧜㧞㧞Ǵ㧲
㧢㧟㧜㨂˴ 㧡㧜㨂
㧯㧝㧞㧝 㧯㧝㧞㧜
㧾㧝㧜㧟
㧝㧛㧠㨃
㧝㧟㧜㨗
㧞㧜㧭 㧞㧡㧜㨂
㨅㧱㧸㧸㧻㨃 㧔㧵㧼㧹˴㧼㨃㧮㧕
㧯㧝㧜
㧲㧯㧢
㧝㧡㧜㧜Ǵ㧲
㨀㧼
㧠㧞㧜㨂
㨅㧱㧸㧸㧻㨃
㧲㧯㧡
㧯㧥
㧝㧡㧜㧜Ǵ㧲
㧠㧞㧜㨂
㨅㧱㧸㧸㧻㨃
㧲㧯㧞
㧝 㧞 㧟 㧠 㧡 㧢 㧮㧯㧺㧝㧟
㧾㧞㧞㧝㧞㧣㧜
㧝㨗
㧠㧚㧣㨗
㧡㨂
㧸㧞
㧯㧺㧝㧟 㧝 㧞 㧟 㧠 㧡 㧢
㧾㧢㧣
㧾㧢㧥
㧾㧣㧜
㧞㧡㨂
㧜㧚㧝Ǵ
㧠
㧟
㧞
㧝
㧸㧝
㧭㧯㨀㧔㧼㧲㧯㧕
㧿㧭㧯㨀㧟㧞㧠㧞㧜
㧠㧚㧣㨗
㧲㧮㧝
㧯㧺㧱
㧡㨂
㧝㧡㨂
㧸㧝
㧭㧲㧝
㧗
㨃㧴㧵㨀㧱
㧝㧛㧠㨃
㧝㧚㧡㨗
㧾㧞㧡
㧞㧡㧜㨂
㧝㧛㧠㨃
㧾㧞㧞 㧾㧞㧝
㧜㧚㧜㧝Ǵ㧲㧝㧜㨗
㧾㧞㧠 㧝㧚㧢㧡㨗㧲
㧯㧞㧢
㧝㧛㧠㨃
㧰㧝㧠
㧝㧟㨂
㧞㧞㨗
㧜㧚㧜㧟㧟Ǵ㧲
㧥
㧢㧤㨗 㧞㧡㨂
㧝㧜 㧯㧞㧣
㧗 㧗 㧗
㧾㧞㧟 㧯㧟㧞
㧝㧝 㧟㧡㨂
㧙 㧙 㧙
㧝㧛㧠㨃
㧝㧡㧜Ǵ㧲
㧵㧯㧤
㧤
㧯㧞㧤 㧯㧞㧥㧾㧞㧣
㧷㧵㧭㧣㧤㧜㧡㧭㧼㧵 㧡㨂
㧞㧡㨂 㧞㧡㨂㧝㧜㨗
㧵㧯㧣
㧝㧤㨂
㧰㧝㧡
㧣㧤㧜㧡
㧗 㧯㧟㧠
㧝㧜㨂
㧡
㧙 㧝㧜㧜Ǵ㧲
㧯㧟㧟
㧗
㧜㧚㧝Ǵ㧲
㧙
㧺㧾㧟
㧡㨂
㧰㧝㧤 㧟㧚㧟㨗
㧾㧣㧠 㧼㧯㧤㧝㧣㨄㧟
㧝 㧼㧯㧞㧠
㧡㧜㨂
㧠㧚㧣㨗 㧝㧜㧜㧜㧼
㧾㧣㧝 㧯㧣㧣
㧟
㧞
㧼㧯㧤㧡㧟㨄
㧞㨃
㧠 㧼㧯㧟㧝
㧞㨃
㧞㨃
㧝㨗
㧝㨗
㧝㨗
㧾㧣㧡㧭 㧾㧣㧡㧮 㧾㧣㧡㧯
㧾㧣㧞
㧡㧢㨗
㧞
㧟
㧟㧚㧟㨗
㧾㧣㧟
㧰㧝㧥 㧾㧣㧥
㧼㧯㧤㧝㧣㨄㧟
㧝㧚㧤㨗
㧝 㧼㧯㧠㧠
㧡㧜㨂
㧯㧣㧜 㧯㧣㧟
㧠㧚㧣㨗 㧝㧜㧜㧜㧼
㧠㧣㧜㧜㧼 㧜㧚㧝Ǵ
㧾㧣㧢 㧯㧣㧢
㧞㧡㨂
㧞㧡㧜㨂
㧟
㧞
㧼㧯㧤㧡㧟㨄
㧠 㧼㧯㧡 㧝
㧞㨃
㧞㨃
㧞㨃
㧝㨗
㧝㨗
㧝㨗
㧾㧣㧣
㧾㧤㧜㧭 㧾㧤㧜㧮 㧾㧤㧜㧯
㧡㧢㨗
㧟
㧞
㧾㧣㧤
㧰㧞㧜 㧟㧚㧟㨗
㧾㧤㧠 㧼㧯㧤㧝㧣㨄㧟
㧝㧚㧤㨗
㧝 㧼㧯㧢 㧠
㧡㧜㨂
㧯㧢㧥 㧯㧣㧞
㧠㧚㧣㨗㧝㧜㧜㧜㧼
㧠㧣㧜㧜㧼 㧜㧚㧝Ǵ
㧾㧤㧝 㧯㧣㧡
㧞㧡㧜㨂 㧞㧡㨂
㧟
㧞
㧼㧯㧤㧡㧟㨄
㧞㨃
㧠 㧼㧯㧣 㧝
㧞㨃
㧞㨃
㧝㨗
㧝㨗
㧝㨗
㧾㧤㧞
㧾㧤㧡㧭 㧾㧤㧡㧮 㧾㧤㧡㧯
㧡㧢㨗
㧟
㧞
㧾㧤㧟
㧰㧞㧝 㧟㧚㧟㧷
㧾㧤㧥 㧼㧯㧤㧝㧣㨄㧟
㧝㧚㧤㨗
㧝 㧼㧯㧤 㧠
㧡㧜㨂
㧯㧤㧝
㧠㧚㧣㨗㧝㧜㧜㧜㧼
㧠㧣㧜㧜㧼㧯㧤㧞
㧾㧤㧢 㧯㧤㧟
㧞㧡㧜㨂 㧜㧚㧝Ǵ
㧟
㧞
㧞㧡㨂
㧼㧯㧤㧡㧟㨄
㧞㨃 㧠 㧼㧯㧥㧝
㧞㨃
㧞㨃
㧝㨗
㧝㨗
㧝㨗
㧾㧥㧜㧭 㧾㧥㧜㧮 㧾㧥㧜㧯
㧾㧤㧣
㧡㧢㨗
㧞
㧟
㧯㧣㧝 㧯㧣㧠
㧠㧣㧜㧜㧼 㧜㧚㧝Ǵ
㧞㧡㧜㨂 㧞㧡㨂
㨆㧰㧞
㧯㧞㧝
㧠㧣㧜㨜㧲 㧾㧝㧡 㧾㧝㧢 㧯㧞㧡 㧢㧤㧜㨜㧲
㧟㧚㧟 㧟㧚㧟
㧝㧛㧞㨃 㧝㧛㧞㨃
㧝㧛㧠㨃
㧢㧤㧜
㧾㧝㧠
㧣 㧝㧜 㧥
㧝 㧞 㧟 㧠
㧗 㧡㧜㨂 㧞㨃
㧙 㧝㧜Ǵ㧲 㧝㧜
㧝
㧯㧞㧞
㧾㧝㧟㧰㧞㧞㧜㨜㧲
㧟
㧞㨗㨂
㧾㧝㧟㧱
㧰㧥 㧾㧝㧣
㧯㧞㧟
㧾㧝㧟㧲
㧵㧯㧠
㧿㨀㧾㧙㧸㧠㧣㧞
㧤
㧾㧝㧟㧯
㧾㧝㧟㧮
㧾㧝㧟㧭
㧾㧥㧟
㧯㧺㧤㧯㧡㨂 㧲㧮㧞
㧡㨂
㧾㧥㧢
㧟㧚㧟㨗
㧾㧥㧠
㧸㧡
㧯㧤
㧳㧾㧭㨅
㧹㧾㨅㧝
㨀㧡 㧮㧸㨁㧱
㧝㧭
㧾㧝㧟㧭㧘㧝㧟㧮㧘㧝㧟㧯㧘㧝㧟㧰㧘㧝㧟㧱㧘㧝㧟㧲㧦
㧞㧡㧜㨂 㧝㧹
㧲㨁㧿㧱㧢 㧝㧛㧞㨃
㨀㧾㧝 㧰㧝㧟
㧯㧝㧣
㧯㧝㧤
㧷㧾㧯㧝㧜㧡㧿
㧝㧡㨂
㧷㧾㧭㧝㧜㧢㧿
㧾㧥㧝
㧝㧜㨗
㧯㧠㧭
㧞㧣㧡㨂
㧜㧚㧜㧟㧟Ǵ㧲
㧔㨟㨡㨏㨠㨕㨛㨚˴㧕 㧣
㨀㧴㧠
㧔㧿㨁㧯㨀㧵㧻㧺˴㧭㧕
㧾㧞㧝㧡 㧜㧚㧜㧝Ǵ㧲
㧞㧚㧞㨗
㨀㧴㧤
㨀㧴㧣
㧔㧿㨁㧯㨀㧵㧻㧺˴㧯㧕
㧔㧿㨁㧯㨀㧵㧻㧺˴㧮㧕
㧜㧚㧜㧝Ǵ
㧝㧢㨂
㧝㨃
㧝㧜㧜
㧟 㧯㧺㧠
㧠㧙㨃㧭㨅
㨂㨍㨘㨢㨑
㧗 㧯㧢㧠
㧝㧜㨂
㧙㧠㧣Ǵ㧲
㨀㧴㧥
㧝
㧾㨅㧝
㧝
㧔㧿㨁㧯㨀㧵㧻㧺˴㧰㧕
㧞㧚㧞㨗
㧞㧚㧞㨗 㧾㧞㧝㧣
㧾㧥㧞
㧾㧤㧮
㧯㧠㧮
㧢㧚㧤㨗
㧝
㧯㧢㧣
㧡㧜㨂
㧯㧢㧢 㧜㧚㧜㧝Ǵ㧲
㧡㧜㨂
㧾㧞㧝㧞
㧝㧜㨗
㧾㧞㧝㧟
㧾㧤㧯
㧯㧣
㧡㧜㨂㧝㧜㧜㧜㨜㧲
㧾㧤㧭
㧾㧥
㧡㧚㧢㨗
㧞㧣㧡㨂˴㧝Ǵ㧲
㧯㧝
㧷㧾㧯㧝㧜㧞㧿
㧽㧝
㧯㧝㧡
㧞㧡㧜㨂
㧟㧚㧝㧡㧭
㧡㨂
㧠
㧞 㧼㧯㧝 㧟
㧼㧯㧤㧝㧣㧝㧢
㧯㧢
㧜㧚㧜㧝Ǵ㧲
㧡㧜㨂
㧝
㧺㧾㧞
㧠
㧯㧝㧢
㧲㨁㧿㧱㧟
㧯㧝㧟
㧞
㧯㧝㧝
㧯㧞
㧯㧝㧠
㧞㧣㧡㨂˴㧝Ǵ㧲
㧯㧝㧞
㧡 㧠 㧟 㧞
㧾㧞㧝㧝
㧝㧜㨗
㧰㧟
㧯㧠㧯
㧾㧞㧜㧥
㧾㧞㧝㧜 㧝㧜㨗
㧝㧜㨗
㧰㧞
㧟
㧰㧡
㧾㧟
㧝㧛㧠㨃
㧟㧚㧥㨗
㧰㧠
㧲㨍㨚
㧹㨛㨠㨛㨞
㧯㧢㧡
㧠
㧯㧝㧞㧘㧯㧝㧠㧦
㧯㧝㧤㧦
㧝㧜㧜㧜㧜㨜㧲
㧞㧡㧜㨂
㧯㧝㧝㧘㧯㧝㧟㧦
㧯㧝㧣㧦
˴㧠㧣㧜㧜㨜㧲
㧞㧡㧜㨂
㧞
㧞㧚㧞㨗
㧝㧜㨗
㧾㧞㧝㧠
㧡㨂
㧯㧺㧟 㧤
㧞㧭
㧞㧡㧜㨂
㧲㨁㧿㧱㧡
㧝
㧟
㧡
㧣
㧥
㧯㧺㧢
㧡
㧺㧾㧝
㧿㧭㧝
㧲㧹㧯㧞
㧲㧹㧯㧝
㧮㨀㧝
㧮㧯㧺㧝㧝
㧞
㧟
㧠
㧝
㧞
㧟
㧠
㧝
㧼㨁㧾㧼㧸㧱
㧞㧡㧜㨂
㧞㧜㧭
㧸㧢
㧮㨀㧞
㨀㧠
㧯㧺㧝㧜
㧳㧾㧱㧱㧺
㧮㧸㧭㧯㧷
㧯㧺㧝㧝
㧸㧱㧰㧠
㧸㧱㧰㧟
㧸㧱㧰㧞
㧸㧱㧰㧝
㧼㨁㧹㧼˴㧰㧻㨃㧺
㧿㨃
㨃㧵㧾㧱˴㧯㧴㧱㧯㧷
㧿㨃
㧿㨃㧞
㨃㧵㧺㨀㧱㧾˴㧯㧻㧻㧸
㧾㧱㧰
㧻㧾㧭㧺㧳㧱
㧔㧰㧵㧿㧼㧸㧭㨅˴㧼㨃㧮㧕
㧞
㧝
㧺
㧔㨁㧺㧵㨀˴㧭㧕
㧺
㧔㨀㧱㧾㧹㧵㧺㧭㧸˴㧮㧻㧭㧾㧰˴㧭㧕
㧮㧸㨁㧱
㧮㧸㨁㧱
㧮㧸㨁㧱
㧮㧸㨁㧱
㧳㧾㧱㧱㧺㧛㨅㧱㧸㧸㧻㨃
㧳㧾㧱㧱㧺㧛㨅㧱㧸㧸㧻㨃
㧳㧾㧱㧱㧺㧛㨅㧱㧸㧸㧻㨃
㧮㧾㧻㨃㧺
㧮㧾㧻㨃㧺
㧮㧾㧻㨃㧺
㧿㧿㧾㧝
㧝㧛㧞㨃
㧸
㧮㧸㨁㧱
㧾㨅㧟
㧾㧡 㧝㧡㧜㨗
㧾㧠㧝㧛㧞㨃
㧝㧡㧜㨗
㧝㧛㧞㨃
㨀㧝
㧾㧥㧤㧱
㧺
㧾㧥㧤㧰
㧾㧣 㧝㧡㧜㨗
㧾㧞
㧾㧥㧤㧯
㧝㧡㧜㨗
㧝㧛㧠㨃
㧡㧝㧜㨗
㧾㧥㧤㧮
㧯㧟
㧾㧥㧤㧭
㧞㧣㧡㨂
㧝Ǵ㧲
㧲㨁㧿㧱㧝
㧾㧥㧤㧲
㧯㧤㧘㧞㧜㧦
㧞㧣㧡㨂
㧞㧚㧞Ǵ㧲
㧯㧡㧡㧲
㧾㧢 㧝㧛㧞㨃
㧾㧝
㧯㧡㧡㧳
㧾㨅㧞
㧝㧛㧠㨃
㧡㧝㧜㨗
㧯㧡㧡㧴
㧟
㧯㧡㧡㧱
㧸㧠
㧯㧡㧡㧰
㧝
㧯㧤㧢㧲
㧟
㧯㧤㧢㧳
㧸㧟
㧾㧥㧤㧴
㧾㧥㧤㧳
㧰㧝㧞 㧾㧝㧥
㧯㧡㧡㧯
㧢㧤㧜Ǵ㧲
㧯㧤㧢㧮
㧝
㧯㧤㧢㧴
㧢㧤㧜Ǵ㧲
㧯㧤㧢㧯
㧔㧯㧻㧺㨀㧾㧻㧸˴㧼㨃㧮㧕
㧯㧤㧢㧱
㧾㧞㧞㧠
㧲㧯㧠
㧯㧤㧢㧰
㧾㧞㧞㧞
㧳㧾㧱㧱㧺㧛㨅㧱㧸㧸㧻㨃 㧮㧸㨁㧱
㧯㧤㧢㧭
㧾㧟㧞㧘㧾㧟㧟㧦㧝㧛㧞㨃㧞㧣㧜㨗㧲
㧻㧾㧭㧺㧳㧱
㧮㧾㧻㨃㧺
㧾㧞㧢
㧠㧚㧢㧠㨗㧲
㧝㧛㧠㨃
㧾㧞㧞㧟
㨃㧴㧵㨀㧱
㧾㧟㧞 㧾㧟㧟
㨄㧝
㨄㧜
㨂㧿㧿
㧼㧠㧝
㧼㧠㧞
㧾㧿㨀
㧼㧠㧟
㧼㧠㧠
㧼㧠㧡
㧼㧠㧢
㧼㧠㧣
㧼㧡㧜
㧼㧡㧝
㧼㧢㧜
㧼㧢㧝
㧼㧢㧞
㧼㧢㧟
㧼㧢㧠
㧼㧢㧡
㧼㧢㧢
㧼㧢㧣
㧭㨂㧿㧿
㧭㨂㧯㧯
㧭㨂㧾
㧼㧞㧟㧔㧮㧕
㨂㧯㧯
㧼㧞㧞㧔㧻㧕
㧼㧞㧝㧔㨅㧕
㧼㧞㧜㧔㨃㧕
㧼㧝㧣
㧼㧝㧢
㧼㧝㧡
㧼㧝㧠
㧼㧝㧟
㧼㧝㧞
㧼㧝㧝
㧼㧝㧜
㧼㧜㧣
㧼㧜㧢
㧼㧜㧡
㧼㧜㧠
㧼㧜㧟
㧼㧜㧞
㧼㧜㧝
㧼㧜㧜
㨂㧯㧯
㨂㧿㧿
㧯
㧾㧞㧠㧜˴㧝㧜㨗
㧔㧼㧻㨃㧱㧾˴㧿㨁㧼㧼㧸㨅㧕
㧯㧡㧡㧮
㧾㧠㧡
㧝㧚㧤㨗
㧾㧞㧟㧝˴㧝㧜㨗
㧞㧡㨂
㧜㧚㧝Ǵ㧲
㧯㧠㧝
㧡㧜㨂
㧝㧜㧜㧜㨜㧲
㧯㧠㧤
㧡㧜㨂
㧝㧜㧜㧜㨜㧲
㧯㧠㧥
㧡㧜㨂
㧝㧜㧜㧜㨜㧲㧯㧡㧜
㧰㧮㧝
㧞㧡㨂
㧜㧚㧝Ǵ㧲㧯㧡㧞
㧯㨀㧝
㧡㧜㨂
㧯㧡㧝
㧜㧚㧜㧝Ǵ㧲
㧯㧺㧝㧜㧝
㧷㧵㧰㧢㧡㧜㧜㧠㧭㧼
㧞㨗
㧝㧛㧠㨃
㧯㧡㧡㧭
㧾㧝㧜㧥㧾㧝㧜㧤
㧺
1–7
㧾㧝㧝㧝㧾㧝㧝㧜 㧾㧝㧜㧤㧙㧾㧝㧝㧝㧦
㧝㧛㧠㨃
㧟㧟
㧭㧱㧙㨄㧹㧞㧠㧴㧾˴㧯㧵㧾㧯㨁㧵㨀˴㧰㧵㧭㧳㧾㧭㧹
AEXM24HR
4. ELECTRONIC CONTROL CIRCUIT DIAGRAM
AEXM24HR
Manual
CHAPTER 2. EXPLANATION OF CIRCUITService
AND OPERATION
AEXM24HR
[1] BLOCK DIAGARM
Power supply
circuit
1A
Fuse
Smoothing
circuit
Active filter
circuit
20 A
Fuse
Filter
circuit
AC power
CPU oscillator circuit
DC over voltage
detection circuit
CPU
DC power
supply circuit
Expansion valve A
drive circuit
Expansion valve A
Expansion valve B
drive circuit
Expansion valve B
Expansion valve C
drive circuit
Expansion valve C
Expersion valve D drive circuit
Expansion valve D
4-way valve relay
drive circuit
4-way
valve
Outdoor fan motor
drive circuit
Outdoor fan
motor
Power transistor module
drive circuit
Power
transistor module
㧔+2/
Serial I/O circuit
CPU reset circuit
3.15 A
Fuse
2A
Fuse
20 A
Fuse
Unit - unit
wiring
(AC power and
serial signals)
Compressor
DC overcurrent detection
circuit / Power transistor
module overheat
AC overcurrent detection
circuit
Current transformer
Compressor thermo circuit
Compressor thermistor
(RE)
CN8A
Heat exchanger pipe
thermo circuit
Heat exchanger pipe
thermistor
(OR)
CN8A
Outdoor temp. thermo.
circuit
Outdoor temperature
thermistor
(N)
CN8A
Suction pipe thermo circuit
Suction pipe thermistor
(BK)
CN8A
Heat sink thermo circuit
Heat sink thermistor
(BK)
CN8B
Unit A thermo. circuit
Thermistor unit A
(BL)
Unit B thermo. circuit
Thermistor unit B
(WH)
Unit C thermo. circuit
Thermistor unit C
(BR)
Unit D thermo. circuit
Thermistor unit D
(YE)
LED drive circuit
Suction thermistor
CN8C
LED
Pump down switch circuit
Wire check switch circuit
Position detection circuit
Compressor
THERML Fuse circuit
THERML Fuse in terminal board
2–1
CN5
AEXM24HR
[2] FUNCTION
1. OUTDOOR UNIT
if the temperature of any of indoor heat exchangers exceeds the
overheating prevention line 1 or 2 during heating, the operating
1.1. FREQUENCY CONTROL
frequency is lowered by approximately 5 to 15Hz.
(1) AC current peak control
AE-XM24HR
After that , the frequency is lowered approximately 5Hz once every
Cooling mode
16.5A
Heating mode
16.5A
60 seconds or approximately 15Hz once every 90 seconds.
When the temperature of all of indoor heat exchangers go below the
(2) Prevention control of outdoor heat exchanger overheating
overheating prevention line 1, the frequency is raised by
If the temperature of the outdoor heat exchanger exceeds the
approximately 5Hz once every 60 seconds, and normal operation is
over heating prevention line 1or 2 during cooling, the operating
restored.
frequency is lowered by approximately 5 to 15Hz.
If the condition that the frequency is minimum lasts for 2 minutes, the
After that, the frequency is lowered
compressor will be stopped.
approximately 5Hz once every 60 seconds or approximately 15Hz
once every 120 seconds.
When the temperature of the outdoor heat exchanger goes below
the overheating
54 ͠
prevention clear line, the frequency is raised by approximately 5Hz
47 ͠
(60͠ )
(60
once every 60 seconds, and normal operation is restored.
temperature of the outdoor heat exchanger decreasing and this
condition lasts for 1 minute, the compressor will be stopped.
55°C
57°C
900
51͠
(57͠ )
(59͠ )
44͠
(57͠ ) Overheating
prevention
line 1
If the frequency is lowered to minimum frequency without the
Overheating Prevention
line 1
Overheating Prevention line
2
Overheating Prevention
clearline
Overheating
prevention line 2
57͠
(62͠ )
(6
48 ͠
(54͠ )
When ON
(When OFF)
2100
5200
7200
1.2. OVER CURRENT PROTECTION
Lower 5Hz once every 60
seconds
Lower 15Hz once every 120
seconds
DC over current detection, AC over current detection
To protect against over current due to sudden change in load,the
compressor is stopped if 55A DC is exceeded in the DC section.
54°C
If the set value of AC current is exceeded in the AC section, the
compressor is stopped. 90 seconds after the compressor has been
(3) Prevention control of compressor overheating If the temperature
stopped, another starting try will be made.
of the compressor exceeds approximately 108°C the operating
Three retries are allowed. On the fourth retry, a complete stop
frequency is lowered approximately 5Hz.
request signal is sent to the indoor unit, and the outdoor unit will
After that, the frequency is lowered approximately 5Hz once every
remain stopped until the indoor operation is stopped.
60 seconds.
DC over current is detected by the power module.
When the compressor temperature drops below approximately
AC over current is detected by CT1 on the outdoor PWB.
108°c, the frequency is raised
approximately 5Hz once every 60 seconds, and normal operation
AE-XM24HR
is restored.
Cooling mode
19.3A
Heating mode
19.3A
1.3. COMPRESSOR PROTECTION CONTROL
If the frequency is lowered to minimum frequency without the
If the temperature of the compressor exceeds 113°C the compressor
temperature of the compressor decreasing,and this condition lasts
is stopped.
for 1 minute, the compressor will be stopped.
In this case, the outdoor fan is not stopped until the temperature of
(4) Prevention control of indoor heat exchanger overheating
Two minutes after room several decrease If the temperature of any
compressor drops below 99°C.In 90 seconds after the
of indoor heat exchangers exceeds the overheating prevention line
compressor is stopped, if the temperature is below 90°C another
1 or 2 during heating, the operating frequency is lowered to
starting try will be made. Three retries are allowed.
minimum frequency.
On the fourth retry, a complete stop request signal is sent to the
When the temperature of all of indoor heat exchangers go below
indoor unit, and the outdoor unit will remain stopped until the indoor
the overheating prevention line 1, the frequency is raised by
operation is stopped.
approximately 5Hz once every 60 seconds, and normal operation
1.4. POWER TRANSISTOR MODULE PROTECTION
is restored.
If the temperature of the chips in the power transistor module
If the condition that the frequency is minimum lasts for 2 minutes,
exceeds 100°C,the compressor is stopped.
the compressor will be stopped.
In this case, the outdoor fan is not stopped until the temperature of
<when nomal>
power module drops below 85°C. In 90 seconds after the
2–2
AEXM24HR
compressor is stopped, if the temperature is below 85°C,another
When the indoor unit of a room requests for the cooling operation to
starting try will be made. Three retries are allowed. On the fourth
the outdoor unit and it runs responding to the request,
retry, a complete stop request signal is sent to the indoor unit,
requests for the heating can't be accepted if the indoor units in other
and the outdoor unit will remain stopped until the indoor operation is
rooms send individual requests.
stopped.
If the indoor unit in another room sends a request for the heating
operation, the operation lamp and timer lamp of the indoor unit in that
1.5. SERIAL SIGNALS
room start flashing in turn to inform that the unit is in the standby
Serial signals consist of all 96-bit signals.
mode.
If the condition as outdoor unit unable to receive a serial signal from
If the operation in one room is stopped while the indoor unit in another
the indoor unit continues for 30 seconds, it closes the expansion
room is in the stand-by mode,
valve which corresponds to the room which can not be communicated.
the operation mode requested by the indoor unit
If all indoor units can not communicate with the outdoor unit,
which is now in the stand-by mode will be accepted.
the compressor is stopped.
At this time, the compressor will be temporarily
1.6. THERMISTOR OPEN OR SHORT
stopped to switch the four-way valve and restart after 90 seconds.
When compressor, heat exchanger, outdoor thermistor,
During the cooling or dry operation, the expansion valve
suction thermistor (CN8A) are in OPEN or SHORT condition,even if
corresponding to the indoor unit that is not running is closed.
they are in the condition which an operation signal is transmitted from
Therefore, the refrigerant will not flow into those units.
indoors, the compressor will not start. If any suction thermistors
However,if the heating operation is in progress, it is possible that it
flows into indoor units which are out of operation depending on the
cycle conditions.
(CN8C) become OPEN or SHORT resistance, the protective
procedure will work only for the cycle corresponding to the
As a result, the indoor exchanger may be heated up even if it is not
malfunctioning suction thermistor.
activated. This is not abnormal.
1.7. MISWIRING CHECK
When the operations in all rooms are stopped, the compressor is
stopped,the expansion valves in all rooms are fully opened.
"Miswiring check" is conducted by detecting the indoor heat exchanger
indoor heat exchanger temp.
1.11. DEFROST OPERATION
For example, when the expansion valve for only room A is open,
(1) Overview
and the wiring is correct, the indoor heat exchanger temp for room
Defrosting begins during heating if the conditions for compressor
A will reduce.
operation time and outdoor heat exchanger temperature are met.
If the wiring is incorrect, the indoor heat exchanger temp for a different
When defrosting begins, the indoor and outdoor fans stop.
room will reduce.
Defrosting stops when the temperature of the outdoor heat exchanger
1.8. SAFETY TIME
goes above approximately 15°C.or defrosting time exceeds 10
When the unit is operated by the remote control after the breaker is
turned on, the safety device of the compressor will work and the
minutes.
compressor will not operate for 90 seconds.
Defrost
mask time
Defrost
mask time
Defrost
mask time
1.9. PUMP DOWN SWITCH
Heating
begins
When the PUMP DOWN SWITCH (SW1) is pressed for 5 seconds or
Defrosting
Max. 10 min.
more, the total A/C system will start its TEST RUN automatically and
Defrosting
Max. 10 min.
the compressor frequency will be 55 Hz.
When operating only the outdoor unit (cooling 55Hz fixed mode) to
(2) Defrosting
make only the outdoor unit run in cooling mode,and apply a voltage
If the compressor operation time is more than 20 minutes in the
of 230 V AC to N and L on the terminal board and push the PUMP
heating mode and the outdoor air temperature and outdoor heat
DOWN SWITCH. (SW1) (Avoid operating the outdoor unit alone for
long periods of time.)
exchange temperature satisfy the defrosting conditions,
1.10. CONTROL OF COMPRESSOR OR AND EXPANSION
VALVE
When the defrosting operation is started, the indoor fan starts to run
the defrosting operation is started.
intermittently.
For 90 seconds after turning on the AC power, the compressor will not
When the outdoor heat exchanger temperature reaches approx. 15°.C
be activated even if indoor units request the compressor to do so.
or above or when the defrosting time exceeds 10minutes,
If the compressor receives a request from one or more indoor units
the defrosting operation is quit.
indoor units after 90 seconds have passed, it will be turned on and the
expansion valve corresponding to the requesting indoor unit will be
opened.
2–3
AEXM24HR
More than
20 min.
More than
20 min.
Heating
operation
start
Defrosting
Max. 10 min.
More than
20 min.
Defrosting
Max. 10 min.
(3) During defrosting
When defrosting begins, the compressor stops.
Approximately 1 minutes later, the compressor reactivates in the
refrigeration cycle, and the outdoor heat exchanger is defrosted.
Each mode is as follows:
The outdoor fan is stopped
The operating frequency is as shown in the table below
The indoor fan is stopped
All expansion valve are open.
for 5 minutes 3900 rpm
after that 3700 rpm
(4) Defrost stop
When defrosting time exceeds 10 minutes
When the temperature of the outdoor heat exchanger rises above
approximately 15°C .
Defrost stop is determined by either of the above conditions,
and the compressor is stopped.
At the same time, the outdoor fan go ON.
The compressor is reactivated in the heating cycle 1 minutes after
it was stopped, and normal control resumes.
1.12. Power factor module Output voltage
If a voltage error over 450V is detected at power factor module output
voltage, the compressor is stopped for 3 minutes. In this case, the outdoor fan does not stop, for 3 minutes, and another try will be made.
Three retries are allowed. On the fourth retry, a complete stop request
signal is sent to the indoor unit, and the outdoor unit will remain
stopped until reset is performed. At this time, the 3 minute delay for
control of the outdoor unit will not function; therefore, do not cancel by
removing the plug and cutting the power.
.
2–4
AEXM24HR
2. Active Filter Circuit
This circuit uses active filter and IPM as the figure below for the high efficiency operation of compressor.
Active filter
Choke coil
Rectification circuit
AC
+
Noise filter
circuit
Comp
ressor
IPM
Sine wave current
ON/OFF
Voltage raise
signal
Compressor
Driving signal
Control
source
Positional
detection
IPM
Control
source
IC1
2.1. Active Filter
In the case the direct current is obtained by the diode bridge and smooth capacitor from the commercial power source, the current wave shape will be
the pulse shape at the peak of the voltage wave shape as shown in the figure below. For this reason, the harmonic current will be generated and at
the same time the power factor will be deteriorated. While monitoring the AC input voltage in the control circuit, in order to be the same phase and
wave shape as this voltage wave shape, IGBT is made ON/OFF by the carrier frequency of approximately 20 kHz. By adoption of this active filter, the
current wave shape can be made to the sine wave synchronized to the commercial power source and the power factor can be made to almost 99%.
As a result of this, reactor can be disused. Active filter works for the improvement of power factor and as the countermeasures for the harmonic current.
Power-supply voltage
(50 Hz)
Current waveform
(Before)
Current waveform
(Active filter)
2.2. Active Filter Voltage Raise Circuit
The IGBT in the figure below is the switching transistor of the active filter. By adding ON signal to the gate of IGBT from the control IC, IGBT turns ON
and the collector current Ic flows. This current flows from the + side of the diode bridge DB to the Choke coil, the - side of the diode bridge DB through
IGBT from the Choke coil L. At this time, energy is stored in the choke coil L. Next, when gate signal of IGBT turned OFF, IGBT will be turned OFF
and the energy stored in L during the ON time of IGBT will be discharged through the diode D, electrolytic capacitor C, load, primary side and the +
side of DB. Assuming the input voltage of active filter (voltage between + and - of DB) as Ei, the output voltage (voltage at the both ends of smooth
capacitor) as Vo, switching cycle of IGBT as T and ON time of IGBT as ton, the voltage between collector emitter of IGBT Vs will be as follows;
Vs= 0 (during ON of IGBT: ton)
Vs= Vo (during OFF of IGBT: T-ton)
Here, assuming no loss in L and IGBT, average value of Vs turns equal to Ei,
Ei=(T-ton)/T x Vo
Therefore
Vo=T/(T-ton) x Ei
As ton is a smaller value than T, output voltage Vo will be higher than input voltage Ei.
2–5
AEXM24HR
L
+
DB
D
Control
Ei
+
Vs
IC
RL
Vo
C
IGBT
-
L1
(+)
L2
P
(-)
Io
PFC control
1
2
3
4
5
6
BCN13
Active Filter Circuit
2.3. Active Filter Driving Electronics Circuit
At the operation of compressor, the microcomputer (IC1), as the 50th pin gets “H”, will turn the transistor Q4 ON through the transistor Q3. By this,
18V is supplied to the 3rd pin of connector BCN13 of the active filter and the active filter will be turned ON.
2.4. Protection Circuit of Active Filter
In order to prevent from the destruction of active filter due to the excessive over or under output voltage of active filter,the active filter
will be turned OFF immediately at the abnormal output voltage by monitoring the output voltage. At the same time, the operation of compressor
will be stopped. Detection circuit of the abnormal voltage detects the abnormal voltage by inputting the output voltage of active filter to the 2nd and
4th pins of comparator IC (IC5) at the divided voltage by the resistors (R31, R32 and R33) and comparing with reference voltage. When the output
voltage of active filter reaches 450V or higher, the 4th pin of IC5 will be higher than the reference voltage at the 5th pin, the output of comparator
will be reversed (H-L), the L signal will be entered at the 52nd pin of microcomputer (IC1) and the operation of the active filter will be stopped.
18V
5V
R36
1M
IC1
52
3
2
12
4
+ 5
0V
R33
270KF
R35
34.8KF
R32
270KF
IC5
C57
0.1u
50V
R34
9.53KF
R31
4.64KF
C56
0.1u
50V
0V
DC
Voltage
0V
0V
2.5. Explanation of IPM drive circuit
The power supply for the IPM drive, and the shunt resistance for over current detection, etc., are provided out of the IPM (in control PWB).
2.5.1 IPM drive power supply circuit
The power supply for driving the upper-phase IGBT (HU, HV, HW) drive employs a bootstrap system.
The 15-V power supply for the lower-phase IC is provided by the control printed circuit board (PWB).
2–6
AEXM24HR
1. Brief explanation of bootstrap system (single power drive system)
To supply power to the upper-phase IC, the microcomputer (IC1) turns ON the lower-phase IGBT (LU, LV, LW).
It results in a charging current that flows through the electrolytic capacitor in each upper-phase IC input and charges the bootstrap capacitor up to
15V voltage.
The power supply for the subsequent stages is stored when the lower-phase IGBT is ON in common drive control of the compressor.
Initial charge period
P(Vcc)
Charging current group
Bootstrap capacitor
(HU,HV,HW)
HVIC
VDB
U,V,W,
High-voltage-withstanding,
high-speed recovery diode
N-side
IGBT
(LU,LV,LW)
VD
LVIC
VCIN(n)
N(GND)
Bootstrap circuit
2.5.2
1. DC overcurrent detection circuit
When a current about 32A or higher flows through the shunt resistance (R100) on IPM printed circuit board (PWB), the voltage on this resistance
is input to IPM CIN pin (16). Then, the gate voltage of the lower-phase IGBT (LU, LV, LW) inside the IPM turns OFF to cut the overcurrent off.
At the same time, an L output which lasts about 1.8 ms is generated from IPM Fo pin (18), and it results in an L level input to overcurrent detection
input pin (53) of the microcomputer (IC1) and then turns OFF the compressor driving signal output (IC1 from pins (65) to (70)) to the IGBT gate.
SET
Protection circuit status
RESET
(Lower phase)
Internal IGBT gate
About 32A
SC
a1
Output current Ic (A)
SC reference voltage
Sense voltage relative
to shunt resistance
Delay by CR time constant circuit
About 1.8 ms
Error output Fo
2.6.
2.6.1 120° energizing control (digital position detection control)
This control system detects the digital position detection signal and adjusts the rate of acceleration/deceleration accordingly.
The motor's induced voltage waveform is input to the comparator in the form of PWM-switched pulse, and a position detection signal is generated as
a reference voltage which is equal to 1/2 of 370 VDC. However, since there is no induced voltage waveform when the PWM waveform is OFF, the
2–7
AEXM24HR
microcomputer works in an internal processing so that detection is enabled only when it is ON. Based on the position signal detected, actual PWM
waveform output timing is determined. Since it does not use a filter circuit, the accuracy of detection.
The microcomputer works in an internal processing to eliminate spiky voltage during the regenerative process.
Furthermore, even if the induced voltage is low, position detection is still possible, and it allows sensor-less operation at low rotation speed in the initial stage of operation. These reduce the starting current and improve reliability of IPM.
Terminal voltage waveform
Reference voltage
(1/2 of DC voltage)
Spiky voltage
(cancelled)
Comparator output waveform
(Position signal waveform)
2.6.2 180° energizing control
This is the control system to moderate the speed by the current phase difference for higher efficiency and lower noise of the compressor. The current
phase difference control is the control system paid attention to the interrelation between efficiency and phase gap generated by the applied voltage of
motor and current in the coil of motor as shown in the figure below.
Motor voltage
Efficiency
Motor current
Best timing
Ტ
Ჷ(
Difference of current
and voltage peak
Უ
Voltage /Current
phase difference
Concept chart of the current phase difference control
This control is the forced magnetization system independent of the location of rotor, detecting the phase difference between driving voltage phase and
line current phase flowing in motor coil, and controls the modulation rate data to get the phase difference at the best efficiency.
2.7. DC Current Detection Sensor Circuit
Control of current phase difference is made by reading in the phase difference generated at the both edges of shunt register (R100) by the compressor electrifying current on the PWB through the Op-amp (IC9) to the microcomputer. This is a control to modulate up to the phase with the best efficiency by comparing the phase of this input current, so called compressor electrifying current, with the compressor driving voltage. In the case that
phase difference between motor voltage and current is large (current delay is large), the control will be made by lowering the compressor modulation
rate data (compressor effective value).
2–8
AEXM24HR
IPM
FUSE 101
250V 20A
P
S
FC1
C121
630v
0.33Ǵ
TU
TV
TW
C
R
N
CIN
C119
1000p
R201
100KF
ZD101
R113 18KF
R100
0.015
5V
Z
D8
15V
8
1
IC1
C96
1000P
Y
R200
1K
C97
0.1μ
4
2
+ 3
IC9
0V
Inverter current detection circuit
R202
20KF
R203
2.0KF
5V
R204
200KF
R205
200KF
0V
2–9
Y
Z
CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
[1] PROTECTIVE FUNCTIONS AND OPERATIONS
FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES
NO. Function
Operation
Description
Detection time
Restart condition
Restarts
time
1 DC over
current
Compressor is stopped if a current
approximately 50A or more flows
in the power transistor module.
During
compressor
operation
Automatically
restarts after safety
time(180 seconds)
4 times
Yes
Yes
2 AC over
current
Lowers the operating frequency if
the compressor AC current exceeds
set value( ). Stops the compressor
if the current exceeds at minimum
frequency.
During
compressor
operation
Automatically
restarts after safety
time (180 seconds)
4 times
Yes
Yes
Lowers the operating frequency if
the temperature of the compressor
thermistor (TH1) rises above 108͠ .
Compressor is stopped if the
thermistor stays above 108 ͠ for
2 minutes at minimum frequency.
4 Compressor Compressor is stopped if the
high
compressor thermistor is above
temperature 113 ͠ (Or when TH1 shorts)
error
During
compressor
operation
Automatically
restarts after safety
time (180 seconds)
No limit
No
No
During
compressor
operation
Automatically
restarts when
thermistor (TH1)
temperature falls
below 99 ͠
(approximately
30 minutes)
4 times
Yes
Yes
5 Outdoor
heat
exchanger
overheat
prevention
control
Lowers the operating frequency if
the temperature of the outdoor heat
exchanger rises above 57͠ during
cooling. Stops the compressor if the
temperature stays above 57͠ for
2 minutes at minimum frequency
During
compressor
operation
Automatically
restarts after safety
time (180 seconds)
No limit
No
No
6 Thermistor
short
Compressor ia stopped, if heat
exchanger or outdoor thermistor
shorts.
Close the expansion valve of the
corresponding room, if some
suction thermistor shorts.
When the room
is activated
turns ON and
the compressor
starts.
Operation OFF
1 time
Yes
Yes
7 Thermistor
open
Compressor is stopped, if
compressor or heat exchanger or
outdoor thermistor opens.
Close the expansion valve of the
corresponding room, if some
suction thermistor shorts. opens.
When the room
turns ON
and the
compressor
starts.
Operation OFF
1 time
Yes
Yes
3 Compressor
overheat
prevention
control
19.3A
3–1
In
Out
door door
NO. Function
8 AC
abnormal
current
Operation
Description
Detection time
Compressor is stopped, if the oper- During
ating frequency is above 70Hz and compressor
the compressor current is below operation
0.8A.
Restarts condition
Restarts In
Out
time
door door
Automatically re4 times Yes
starts after safety
time (180 seconds)
Yes
During
9 Serial signal INDOOR
error
If open, while timer LED blinks, op- operation
eration is continued.
If short, operation is continued.
OUTDOOR
Closes the expansion valve of the
corresponding room if the outdoor
unit does not receive a serial signal
from one or more indoor unit for 30
seconds.
Compressor is stopped, if the outdoor unit does not receive a serial
signal from all indoor units.
Automatically re- No limit Yes
starts as soon as
the serial communication becomes
possible.
Yes
During
miswiring
operation
Miswiring check op- 4 times Yes
eration will not restart automatically.
Yes
Automatically re- No limit No
starts after safety
time.(180 sec.)
No
10 Miswiring
check error
Compressor is stopped, and
miswiring check operation ends.
11 Indoor heat
exchanger
overheat
prevention
control
Lowers the operating frequency if During
the temperature of any of indoor compressor
heat exchanger rises high temper- operation
ature during heating.
Stops the compressor if the temperature srays high for 2 minutes
at minimum frequency.
12 Power factor Compressor stops if DC voltage
module
is 450V or higher.
(Active filter)
over voltage
error
During
compressor
operation
Automatically re- 4 times Yes
starts after safety
time.(180 sec.)
Yes
13 Power factor Compressor stops if DC voltage
is 280V or lower.
module
(Active filter)
low voltage
error
During
compressor
operation
Automatically re 4 times
starts after safety
time.(180 sec.)
Yes
14 Power factor
module
(Active filter)
clock error
At compressor Compressor contin- None
startup,when in ues operation without stopping.
operation.
When power source frequency
cannot be detemined (at startup).
or when power source clock cannot be detected for 1 continuous
second (at startup).
15 Outdoor unit Operation stops if there is no
DC fan error input of rotation pulse signal from
outdoor unit fan motor for 30 seconds.
When outdoor
unit fan is in
operation.
In the case that the feed back signal During
16 DC
Compressor from the compressor is not input or compressor
abnormal.
operation
rotation
error
17 IPM overheat
prevention
control.
IPM high
temperature
error
18
Thermal
fuse error
Lowers the operating frequency if During
the temperature of IPM rises high compressor
operation
temperature.
Stops the compressor if the temperature srays high for 2 minuteS at
minimum frequency.
When thermal fuse in the outdoor
terminal board blew.
Yes
Yes Yes
Operation OFF or ON Yes ‫ ڏ‬Yes Yes
Automatically re- 8 times Yes
starts after safety
time.(180 sec.)
Yes
Automatically re- No limit No
starts after safety
time.(180 sec.)
No
Operation OFF
1 time Yes Yes
‫ ڏ‬6JGQWVFQQTWPKVTGUVCTVUHQWTVKOGUDGHQTGVJGKPFQQTWPKVGTTQTKUFKURNC[GF
EQORKGVGUJWVFQYP˴
3–2
[2] TROUBLESHOOTING GUIDE
T R OUB L E S HOOT ING G UIDE
1. S E L F -DIA G NOS IS F UNC T ION A ND DIS P L A Y MODE
(1) T o call out the content of the s elf-diagnos is memory, hold down the emergency operation button for more than five
s econds when the indoor unit is not operating.
a) According to the content of the self-diagnosis memory, the Operation LE D (main category) and the P lasmacluster
Ion LE Ds (s ub-category) flas h in s ync with the T imer LE D on the indoor unit.
b) In the event a complete s hutdown occurs due to a malfunction, the Operation LE D (red), T imer LE D (yellow),
P las maclus ter Ion LE D (blue), and P las maclus ter Ion LE D (green) flas h to indicate the general information of
the generated malfunction.
c) If the power cord is unplugged from the AC outlet or the circuit breaker is turned off, the s elf-diagnos is memory
los es the s tored data.
(2) Dis play of detailed s elf-diagnos is res ult with main category and s ub-category indications
W hen malfunction information is called out, the main category and s ub-category of the s elf-diagnos is res ult are
indicated by the Operation, T imer, and P las maclus ter Ion LE Ds on the indoor unit.
Main category
*1: E xample of s elf-diagnos is res ult dis played on indoor unit: S uction thermis tor open-circuit error
B as ic flas hing cycle due to error
T imer LE D [yellow]
ON
OF F
Operation LE D [red]
ON
OF F
1 s ec 1 s ec 1 s ec
S ub-category
Malfunction No.
5 s ec
F igures in ( ) indicate numbers (binary notation) as s igned bas ed on the flas hing s equence.
P las maclus ter Ion LE D [blue]
F las hing for main category indication
F las hing for s ub-category indication
*2: T he s elf-diagnos is dis play function of the outdoor unit indicates the error information by flas hing L E D1 on the
outdoor unit according to the content of s elf-diagnos is .
T he s elf-diagnos is dis play function of the outdoor unit is active only for about 3 to 10 minutes after s elf-diagnos is is
performed during operation, and the dis play returns to normal condition after this dis play period.
T he content of s elf-diagnos is cannot be called out by the s elf-diagnos is dis play function of the outdoor unit.
E xample of s elf-diagnos is dis play on outdoor unit : C ompres s or high-temperature abnormality
ON
OF F
0.5 sec 0.5 sec 0.5 sec
0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec 0.5 sec
3–3
0.5 sec 0.5 sec 0.5 sec 0.5 sec
3–4
8 time
Indoor/outdoor
units in
complete
shutdown
Indoor/outdoor
units in
complete
shutdown
Indoor/outdoor
units in
complete
shutdown
7 time
Indoor/outdoor
units in
complete
shutdown
12 time
11 time
9 time
6 time
5 time
2 time
1 time
Normal
flashing
-1
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
6
12 -0
12
_
(1)Change the heat-sink thermistor.
_
Outdoor unit DC fan rotation error
(1)Check thGVJGTOCNHWUGKPVGTOKPCNDQCTF
HQT2QYGTUWRRN[
(2)Check connector CN5 of the outdoor unit.
(1)Check connector CN3 of the outdoor unit DC fan motor fo r secure installation.
(2)Check the outdoor unit fan motor for proper rotation.
(3)Check fuse FUSE5.
(4)Outdoor unit control PCB
(3)Check the 4-way valve for proper operation.
(1)Check to make sure outdoor unit thermistor TH2 (exchange) is installed in
correct TH3 (pipe temperature) poctions.
(2)Check if the refigerant volume is abnomally low.
(1)Check the expansion valve. (unit A - D)
(2)Are four expansion valves connected by mistake
(3)Check the wiring between units.
Abnormal wire check error
4 way valve error
or Gas leak error
(1)Replace the outdoor unit control PCB assembly.
(2)Charge the specified amount of refrigerant.
(2)Replace the outdoor unit control PCB assembly.
(1)Replace terminal board for Power supply
(1)Correct the installation.
(2)Replace the outdoor unit fan motor.
(3)Replace the outdoor unit control PCB assembly.
(4)Replace the outdoor unit control PCB assembly.
(1)Correct the installation.
(2)Change the speccified amount of refrigerant.
(3)Replace the 4-way valve.
(1)Replace the outdoor control board assembly.
(2)Reattach
(3)Check the wiring between units.
(3)Correct refrigerant clogs.
(Stop valve,pipe,expansion valve)
(1)Ensure unobstructed air flow from the outdoor unit air outlet.
(2)Check the outdoor unit fan motor.
(1)Replace the outdoor unit control PCB assembly.
(2)Charge the specified amount of refrigerant.
(3)Correct refrigerant clogs.
(Stop valve,pipe,expansion valve)
(1)Replace the outdoor IPM PWB
(1)Ensure unobstructed air flow from the outdoor unit air outlet.
(2)Check the outdoor unit fan motor.
(1)Replace the outdoor unit IPM PWB assembly.
(1)Replace the outdoor unit IPM PCB assembly.
(2)Correct the installation (tighten the screws).
Apply silicon grease.
(3)Replace the outdoor unit fan motor.
(4)Replace the outdoor unit IPM PCB assembly.
(5)Replace the compressor.
AC current deficiency error
(1)IPM continuity check
(1)Ensure unobstructed air flow from the outdoor unit air outlet.
(2)Check the outdoor unit fan motor.
(1)Check the IPM is attached correcity to
the outdoor unit IPM PWB.
(1)IPM continuity check
(2)Check the IPM and heat sink for secure installation.
(3)Check the outdoor unit fan motor for proper rotation.
(4)No abnormality found in above inspections (1)through (3).
(5)No abnormality found in above inspections (1)through (4).
(1)Check connector CN8A and CN8C of the outdoor unit thermistor for secure (1)Correct the installation.
(2)Replace the outdoor unit thermistor assembly.
installation.
(3)Replace the outdoor unit thermistor assembly.
(2)Measure resistance of outdoor thermistors TH1~4,6~9.
(4)Replace the outdoor unit control PCB assembly.
(3)Check the lead wires of thermistors TH1~4,6~9 on the outdoor unit
control PCB for open-circuit.
(4)No abnormality found in above inspections (1)through (3).
(1)Measure resistance of the heat-sink thermistor.(CN8B)
_
_
_
(1)Ensure unobstructed air flow from the outdoor unit air outlet.
(2)Connect power supply of proper voltage.
(3)Charge the specified amount of refrigerant.
(4)Replace the outdoor unit compressor thermistor assembly.
(5)Replace the expansion valve coil,expansion valve or outdoor unit control PCB
assembly.
(1)Ensure unobstructed air flow from the outdoor unit air outlet.
(2)Check the outdoor unit fan motor.
AC maximum current error
AC current error when OFF
AC overcurrent error
IPM
pin level error
DC overcurrent error
Thermal fuse
Thermal fuse error
in terminal board in terminal board
(for power supply)
Outdoor unit
DC Fan
11
11 -0
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Cycle
temperature
9
9 -4
Operation lamp(RED)
Cluster lamp(BLUE)
Abnormal wire
check
Outdoor unit
AC Current
8
7
8 -0
-2
-3
-1
7 -0
-1
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Outdoor unit
DC Current
Thermistor Unit A - D thermistor opencircuit error
-5
6 -0
Discharge thermistor open-circuit error
-4
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Suction thermistor open circuit error
-2
Operation lamp(RED)
Cluster lamp(BLUE)
Heat exchanger thermistor open-circuit
Outdoor unit
error
thermistor opencircuit
Outdoor temperature thermistor opencircuit error
IPM high temperature error
Temporary stop due to indoor unit heat (Temporary stop for cycle protection)
exchanger overheat *3
Temporary stop due to IPM overheat *3 (Temporary stop for parts protection)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
5
-2
-3
-4
-5
5 -0
Temporary stop due to out door unit
Suction thermistor open circuit error
(Temporary stop for cycle protection)
(1)Check the outdoor unit air outlet for blockage.
(2)Check if the power supply voltage is 90 V or higher at full power.
(3)Check the pipe connections for refrigerant leaks.
(4)Measure resistance of the outdoor unit compressor thermistor.
(TH1:Approx.53 k at 25 C)
(5)Check the expansion valve for proper operation.
Temporary stop due to compressor dis- (Temporary stop for cycle protection)
charge overheat *3
Compressor high temperature error
Thermistor Unit A - D thermistor shortcircuit error
-1
Operation lamp(RED)
Cluster lamp(BLUE)
_
Remedy
(1)Replace the outdoor unit thermistor assembly.
Heat exchanger thermistor short circuit (1)Measure resistance of the outdoor unit thermistors.
(2)Replace the outdoor unit thermistor assembly.
(TH2~4,6~9 : Approx.4.4 k at 25 ͠)
error
Outdoor temperaturethermistor short- (2)Check the lead wire of the outdoor unit thermistor for torn sheath and short- (3)Replace the outdoor unit control PCB assembly.
circuit.
circuit error
(3)No abnormality found in above inspections (1)and (2).
Suction thermistor short-circuit error
Operation lamp(RED)
Cluster lamp(BLUE)
Cycle
temperature
Outdoor unit
thermistor
short-circuit
Operation lamp(RED)
Cluster lamp(BLUE)
2
0
1
Sub category
Normal
Inspection location/method
2 -0
-1
-2
-3
0 -0
1 -0
Main category
Content of diagnosis
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Main
Wall(Grill)
: Flashes 3 times in 0.2-sec intervals
Indication on indoor unit
: 1sec ON / 1sec OFF X : OFF
Indication by
Wall
Floor / ceiling
(Panel)
LED1 on
outdoor unit Lighting pattern at the time of timer lamp lighting
*2
Main Sub
X for 5 seconds
Indoor/outdoor
units in
complete
shutdown
Indoor/outdoor
units in
complete
shutdown
Indoor unit in
operation
Outdoor unit in
temporary stop
Indoor/outdoor
units in
complete
shutdown
Indoor/outdoor
units in
operation
Indoor/outdoor
units
incomplete
shutdown
Status of
indoor/outdoor
units
Flashes in 1-sec intervals (normal)
3–5
X
Indoor/outdoor
units in
operation
Indoor/outdoor
units in
operation
X
X
Indoor/outdoor
units in
complete
shutdown
Indoor unit in
operation
Outdoor unit in
complete
shutdown
X
14 time
Indoor/outdoor
units in
complete
shutdown
Indoor unit in
operation
Outdoor unit in
complete
shutdown
13 time
Drain pump unit Drain pump unit error
30 -0 30
Operation lamp(RED)
Cluster lamp(BLUE)
EEPROM data error
Indoor unit
control PCB
20 -0 20
Operation lamp(RED)
Cluster lamp(BLUE)
Indoor unit fan error
Serial erroneous wiring
Serial short-circuit
erroneous wiring
Serial open-circuit
Operation lamp(RED)
Cluster lamp(BLUE)
Wires between
units
Wires between
units
Indoor unit fan
-1
18 -0 18
17 -0 17
low valtage error
-4
(1)Check connector CN2 and CN10.
(1)Check the indoor fan motor for proper rotating operation.
(Check fan lock.)
(2)Check the lead wire of the indoor fan motor for open-circuit.
(3)Check connector of the indoor unit fan motor for secure installation.
(4)No abnormality found in above inspections (1)through (3).
(EEPROM read data error)
(1)Check the wires between units.
(1)Check the wires between units.
(1)Check the wires between units.
(2)Check the outdoor unit fuse.
(3)Check 15-V,13-V and 5-V voltages on the PCB.
Check resistance between IPM terminals.
(4)Check pins No.5 and 8 of connector CN3A of the outdoor
unit fan motor for short-circuit.
(5)Outdoor unit control PCB.
(1)Check the wires between units.
(2)Check voltage between N and 1 the indoor/outdoor unit terminal boards.
(1)Check the AC power supply valtage for fluntuation.
(1)Check the clock for proper inputt.
Clock error
(1)Check the circuit of detection of inverter current.
-1
Detection error of inverter current.
(1)Check the colors (red,white,orange)of the compressor cords
for proper connection. (PWB side, compressor side)
(2)Check if the IPM terminal resistance values are uniform.
(3)Check if outdoor main relay (MRY1) turns
. on and voltage of both end of the
condenser (C10) has become DC380V.
(4)No abnormality found in above inspections(1)and(3).
(5)No abnormality found in above inspections(1)and(4).
(1)Check the AC power supply voltage for fluctuation.
(2)No abnormality found in above inspection (1).
(3)Replace the Active filter.
Outdoor unit
active filter
Compressor rotation error
(at 180qGPGTIK\KPI
Compressor rotation error.
(at 120qGPGTIK\KPI
DC compressor Compressor startup error
Sub category
Inspection location/method
Active filter overvoltage error
14 -0 14
-1
-2
-3
13 -0 13
Main category
Content of diagnosis
19 -0 19
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Operation lamp(RED)
Cluster lamp(BLUE)
Indication by
Wall
Floor / ceiling
(Panel) Wall(Grill)
LED1 on
outdoor unit Lighting pattern at the time of timer lamp lighting
*2
Main Sub
Main
X for 5 seconds
Indoor/outdoor
units in
complete
shutdown
Status of
indoor/outdoor
units
: Flashes 3 times in 0.2-sec intervals
Indication on indoor unit
Flashes in 1-sec intervals (normal) : 1sec ON / 1sec OFF X : OFF
(1)Replace the Drain pump unit unit.
(2)Re-insertion of CN2 and CN10.
(1)Replace the indoor unit control PCB.
(1)Replace the indoor fan motor.
(2)Replace the indoor fan motor.
(3)Correct the installation of CN3 of the indoor fan motor.
(4)Replace the indoor unit control PCB.
(1)Correct the wiring.
(1)Correct the wiring.
(1)Correct the wiring.
(2)Replace the fuse/outdoor unit control PCB assembly.
(3)Replace the outdoor unit control PCB assembly.
(4)Replace the outdoor unit fan motor.
(5)Replace the outdoor unit control PCB board.
(1)Connect stable power supply.
(2)Replace the outdoor unit control PCB assembly.
(2)Replace tfe outdoor unit control PCB assembly.
(1)Conect stable power supply.
(1)Replace the outdoor unit control PCB assembly.
(1)Connect stable power supply.
(2)Replace the outdoor unit control PCB assembly.
(1)Replace the outdoor unit control PCB assembly.
(1)Correct the installation.
(U:Red,V:White,W:Orange)
(2)Replace the outdoor unit control PWB assembly.
(3)Replace the outdoor unit control PWB assembly.
(4)Replace the outdoor unit control PWB assembly.
(5)Replace the compressor.
Remedy
CHECK METHOD (OUTDOOR)
CAUTION IN CHECKING PRINTED CIRCUIT BOARDS (PWB)
Non-insulated control circuit
The GND terminals of the low-voltage circuits (control circuits for microcomputer and thermistors and drive circuits for expansion valve and relays) on
the control printed circuit board (PWB) are connected to the compressor drive power supply (370-VDC negative terminal). Therefore, exercise utmost
caution to prevent electric shock.
If a measuring instrument used for the test is grounded, its chassis (ground) has the same electric potential as the 0-V probe. Since non-insulated circuits have the following voltage potential difference from the ground, connection of the grounding wire results in a short-circuit between the 0-V line
and the ground, thus allowing an excessive current to flow to the tester to cause damage.
If the sheaths of the thermistor lead wires or expansion valve lead wires inside the outdoor unit become damaged due to pinching by the front panel
or other metal parts or contacting a pipe, a high voltage can flow and destroy the circuits. To prevent these problems, carefully conduct assembly
work.
Do not touch the
cabinet or bring metal
parts into contact with
the cabinet.
Danger!!
Do not connect
the grounding
wire.
Reason
The oscilloscope (chassis ground) has the same electric potential as the 0-V
probe. The entire electronic control section of the outdoor unit has a voltage
potential difference from the ground࡮ When the oscilloscope is set up,
the 0-V line and the ground voltage (ground) will be short- circuited,
resulting in an excessive current flow to cause damage to the
oscilloscope or indoor electric circuits.
3–6
Figure 1
Cautions when attaching or removing the board
When operating only the outdoor unit (cooling 55 Hz fixed mode) To make
only the outdoor unit run in cooling mode, and apply a voltage of 220 ~
240V AC to L and N on the terminal board and push the PUMP DOWN SWITCH
(SW1).
(Avoid operating the outdoor unit alone for long periods of time.)
3–7
Figure 2 Temperature properties of outdoor thermistors
1
1
8
8
Connector
CN8A
Connector
CN8C
TH2 : Heat exchanger pipe thermistor (CN8A 3 - 4 )
TH3 : Outdoor temp. thermistor (CN8A 5 - 6 )
TH4 : Suction thermistor (CN8A 7 - 8 )
TH6 : Thermistor unit A (CN8C 1 - 2 )
TH7 : Thermistor unit B (CN8C 3 - 4 )
TH8 : Thermistor unit C (CN8C 5 - 6 )
TH9 : Thermistor unit D (CN8C 7 - 8 )
Resistance ( ǡ )
Resistance ( ǡ )
TH1 compressor thermistor
(CN8A 1 - 2 )
500k
400k
25 ͠ resistance
45 k
300k
200k
5.78k 3.06k
4.17k 2.28k
1.72k
100k
40k
20k
10k
0
-20
0
20
60
0 ͠ resistance
14.5 kǡ
25 ͠ resistance
4.431 kǡ
TH2 - TH4
TH6 - TH9
30k
0
80 100 120
40
0
20
60
Temperature (͠)
-20
Temperature (͠)
To measure the resistance, first remove the connector from the board.
Thermistor
No. Connector
Color
Compressor thermistor
TH1
Red
Heat exchanger pipe thermistor
TH2
CN8A
CN8A
Connector pin
No. 1 to 2
TH3
CN8A
Orange
Green
No. 3 to 4
Outdoor temp. thermistor
Suction thermistor
Thermistor unit A (suction)
TH4
CN8A
Black
No. 7 to 8
TH6
CN8C
Blue
No. 1 to 2
Thermistor unit B (suction)
TH7
CN8C
White
No. 3 to 4
Thermistor unit C (suction)
TH8
CN8C
Brown
No. 5 to 6
Thermistor unit D (suction)
TH9
CN8C
Yellow
No. 7 to 8
No. 5 to 6
Figure 3 Temperature properties of heatsink thermistor
500
Resistance (k )
400
Thermistor
Signal
Color
Heatsink
CN8B
Black
To measure the resistance, first remove
the connector as shown at right.
300
1
3
Heatsink thermistor
TH5 (black)
25 ͠ resistance 50k
200
6.14k
100
0
-20
0
20
40
60
Temperature (͠ )
Tester
3.25k
12.3k
80
3–8
100
3–9
Check the pressure.
The cooling cycle is abnormal.
1. When all rooms are not cooled
Yes
Repair the wiring between the
units.
Check that the power between
the terminal board " N " and " L "
of the indoor unit is AC 230V,
50Hz.
No
Are the timer lamps of the indoor
units in all rooms flashing ?
No
Is the compressor of the outdoor
unit operating ?
Press the OPERATION button
to start operating the air-conditioner. (One-room operation ON)
(Set the cooling mode to 18 ͠㧕
No
Are the timer lamps of the indoor units in all rooms flashing ?
How to distinguish the defective parts
Yes
Yes
TO
A
Check the failure symptom with
the failure diagnosis mode.
(Check the failure with the outdoor unit.)
3 – 10
Replace the
thermistor.
No
Is the resistance
value of the ther mistor for the compressor (TH1), heat Yes
ex-changer (TH2)
or outdoor temperature (TH3) or suction (TH4, TH6-9)
correct?
Open circuit of the
outdoor thermistor
A
No
Check the voltage
(15V).
No
AC overcurrent
Yes
Connect CN3
Yes
Replace the fan motor.
No
Inspect the compres sor, heat exchanger
and piping.
The cycle is abnormal .
Yes
Is the resistance value
between 5 and 8
of fan motor 0?
Check the FUSE 5
Yes
Is CN3 connected ?
No
Is the outdoor fan
motor operating ?
Overheat of the compressor
Replace the Compressor.
The compressor is abnormal.
Replace the IPM PWB
Yes
Power module PWB
(IPM) abnormality
No
Replace the IPM PWB.
Yes
Yes
No
Connect CN6.
Check the voltage (5V).
Replace the current
transformer
Yes
Is CN6 connected ?
Yes
Are 4 LED
switched off ?
Open circuit of serial s ignal line
Short circuit of serial s ignal line
Is the resistance value of the
No
winding in the current trans former 㧔%6? (720 )
Replace the outdoor control PWB.
No
Yes
Is the winding of the current
transformer 㧔%6 broken ?
Abnormal AC current
Fix the IPM PWB with
screws securely.
Is each of the resistance values among
the terminals of the
IPM PWB 0 ?
P - U, N - U
P - V, N - V
P - W, N - W
No
Is the IPM PWB in a
state of floating from
the heat sink ?
Connect CN2
No
Is each of the resistance
values among the termi nals of the IPM PWB 0 ?
P - U, N - U
P - V, N - V
P - W, N - W
Check the voltage
(15V).
Yes
No
Is CN2 connected ?
Rotation error of
the compressor
Fix the Power factor
module with screws
secuerly
Yes
No
Replace the Power
factor module (AF1)
Is the resistance value among
Yes
the terminal of the Power fac tor module (AF1) 0 ?
No
Is the Power factor module in a
state of flaoting from the heatsink?
Power factor module (AF1) error
3 – 11
R epair the wiring
between the units .
No
R eplace the indoor
control P W B .
Y es
C heck that the power
between the terminal
board "N" and "1" of the
indoor unit is AC 230V .
No
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
to 18 ͠㧕
P ress the OP E R AT ION
button to start operating
the air-conditioner.
(S et the cooling mode
No
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Y es
Y es
R eplace the thermistor.
No
R eplace the outdoor control P WB
or the expansion valve (UNIT A)
or the expansion valve (UNIT B )
or the expansion valve (UNIT C )
or the expansion valve (UNIT D)
Is the resistance value of the thermistor for UNIT A (T H6), UNIT B Y es
(T H7), UNIT C (T H8) or UNIT D
(T H9)
S hort circuit of the thermistor error
Open circuit of the thermistor error
C heck the failure
symptom with the failure
diagnosis mode.
2. When one room is not cooled (other rooms are cooled)
Y es
No
R epair the wiring between
the units.
Is the wiring between the
units connected by mistake
or broken ?
Open circuit of serial signal line
S hort circuit of serial signal line
R eplace the indoor control P W B .
R eplace the indoor fan motor.
T he fuse is blown.
Y es
Is the resistance value of the No
winding in the fan motor ?
Abnormal fan motor of
indoor unit
3 When all rooms are not heated
Does the air get cooler in the
cooling operation mode?
Ye s
No
Refer to 1 All rooms are
not cooled.
Press the ON switch on the
remote control to run the air
conditioner.
Set the temperature to 32͠
in the heating mode and
start operation.
No
Ye s
Is the outdoor compressor
running?
No
Ye s
To A
Check the four-way valve.
Has the cycle been switched?
No
The heating cycle is normal.
Is AC230V applied between
the connector(CN4) 1 and 3
of the 4-way valve ?
Pressure check
Ye s
Replace the 4-way valve.
3 – 12
AEXM24HR
CHAPTER 4. REFRIGERATION CYCLE
AEXM24HR
Service Manual
[1] REFRIGERATION SYCLE
1. class indoor unit is connected UNITA
UNIT D
3
E xpansion valve D
Heat exchanger
S TOP valve (Liquid)
UNIT B
3
E xpansion valve B
Heat exchanger
4
E xpansion valve A
UNIT A
3
Heat exchanger
S TOP valve (G as)
INDOOR UNIT
OUT DOOR UNIT
F igure
R efrigeration C yc le
UNIT D
UNIT C
UNIT B
UNIT A
INDOOR UNIT
Cooling
OUTDOOR UNIT
heating
Figure Flow of Refrigerant
4–1
Heat exchanger
E xpansion valve C
Heat exchanger
2
4-way valve
3
Accumulator
UNIT C
C ompres s or
1
AEXM24HR
2. Cycle temperature and pressurre in stop valve (AEXM24HR)
Running unit
07
&
07
&
07
&
07
(4 units)
12
(1 unit)
09
(1 unit)
07
(1 unit)
no
opration mode
Cool(MAX)
Cool(Test run)
Heat(MAX)
Heat(Test run)
88
43
13
14
71
40
16
17
74
14
31
0
48
5
24
3
1.12MPa(abs)
1.23MPa(abs)
2.33MPa(abs)
1.80MPa(abs)
Frequency
100Hz
55Hz
110Hz
50Hz
1
2
3
4
stop valve pressure
Frequency
Frequency
1
2
3
4
stop valve pressure
Frequency
Frequency
1
2
3
4
stop valve pressure
Frequency
Frequency
83
37
10
11
0.90MPa(abs)
69
36
12
17
1.08MPa(abs)
75
19
38
1
3.54MPa(abs)
55
8
23
7
2.17MPa(abs)
30Hz
57
37
14
12
85Hz
83
18
40
3
40Hz
55
7
24
6
1
2
3
4
stop valve
(gas saide)
60Hz
65
37
11
6
0.96MPa(abs)
1.14MPa(abs)
3.50MPa(abs)
2.10MPa(abs)
45Hz
71
31
11
16
25Hz
63
35
14
21
75Hz
72
13
32
4
30Hz
48
7
25
7
1.03MPa(abs)
1.18.MPa(abs)
3.07MPa(abs)
1.93MPa(abs)
35Hz
20Hz
60Hz
25Hz
Standard conditions
indoor saide
Dry-bulbtemp(°c)
Çooling
Heeting
27
20
Relativehumidity(%)
47
–
Outdoor saide
RelativehumidDry-bulbtemp(°c)
ity(%)
35
40
7
87
4–2
AEXM24HR
3. PERFORMANCE CURVES
NOT E : T otal cooling capacity and total input with 4 units running.
(R unning frequency: HZ)
(R unning frequency: HZ)
2400
Input(W)
2400
2200
17
1800
16
15
14
1600
36
34
32
7.5
7.0
6.5
6.0
24
26
28
30
32
34
36
38
40
42
2000
1800
Heating capacity(kW)
C ooling capacity(kW)
13
2200
8.0
30
7.0
28
6.0
5.0
-6
44
-4
Outside air temp. (͠)
F ig.
Outlet air temp. (͠)
2000
Outlet air temp. (͠)
Input(W)
2600
-2
0
2
4
6
8
10
12
Outside air temp. (͠)
A t C ooling for A Y -XP M7F R (for A E -XM24HR )
[2] PERFORMANCE CURVES
F ig. A t Heating for A Y -XP M7F R (for A E -XM24HR )
(-76cmHg).
(5) Close the gauge manifold valve.
1. Piping
(6) Turn off the vacuum pump.
(7) Fully open the stop valve (liquid side) with hexagon socket screw
INDOOR UNIT
Max. piping length A
Max. piping length A
Max. total piping length of all unit
Max.level difference B
20m
3m
50m
10m
a. If total piping iength exceeds
40m, add20g of refrigerant per 1m.
key. Turn all the way up to contact.
(8) Fully open the stop valve (gas side) with hexagon socket screw
A
key. Turn all the way up to contact.
OUTDOOR
UNIT
9) Disconnect the gauge manifold hose from the service port.
B
(10) Replace the service port cap and both valve shaft caps tightly.
b. When the outdoor unit is placed at a higher
level than the indoor units, provide a trap
near the hosẻs lead-in port.
Turn until thetorque suddenly increases.
B
Now tighten a 1/6-turn more.
NOTE: *Use a gauge manifold and hoses exclusive for R410A.
TRAP
*After air removal,check the tubeconnections for gas..
leak using a leakage detector or soapy water.Regarding
2. Air-removing
leakage detector,use high-sensitivity type designed
Use an adapter for preventing vacuum pump oil from flowing back to
the gauge manifold hose. ON/OFF operation of the vacuum pump
specially for R410A.
should be made by the adapter switch.
(1) Remove both valve shaft caps of the stop valves.
(2) Remove the service port cap of the stop valve (gas side).
(3) Connect the gauge manifold hose to the service port and the
vacuum pump. Be sure that the hose end to be connected to the
service port has a valve core pusher.
(4) Open the gauge manifold valve and operate the vacuum pump for
10-15 minutes. Make sure the com pound gauge reads -0.1MPa
4–3
AEXM24HR
Gauge manifold
Compound
gauge
Lo
Hi
Hose
Service port
Stop valve
(gas side)
Stop valve
(liquid side)
Vacuume pump adapter
Service port
Hexagon socket screw key
4 mm
Valve shaft cap
OPEN
Pump down
(Pump down is adopted in the case of unit removal for re installation,
abandonment, repair etc.)
Pump down is to collect the refrigerant into the outdoor unit by control
of the stop valves and the compressor.
(1) Turn the circuit breaker on.
(2) Check that all LED (1.2.3.4)
on the display board unit are flashing synchronously in a slow
(one flash per second) cycle.
(3) Stop the air conditioner operation.
(4) Remove both valve shaft caps of the stop valves.
(5) Press the PUMP DOWN SWITCH (SW1) on the display board
unit for 5 seconds or more. The indoor/outdoor unit will start
operation in the pump down mode.
(the OPERATION lamp on the indoor unit will flash and three
BEEP will be emitted.)
(6) After 5 ~ 10 minutes, fully close the stop valve (liquid side) by
turning the hexagon socket screw key clockwise.
(7) After2~3minutes, immediately close the stop valve (gas side) fully.
(8) Press the PUMP DOWN SWITCH (SW1) on the display board
unit for 5 seconds or more.
The operation of indoor/outdoor unit will stop.
(9)Replace the service port cap and both valve shaft caps tightly.
NOTE: *Wait more than 90 seconds after finishing pumpdown, and
turn off the circuit breaker off.
UNIT BB
UNIT
UNIT AA
UNIT
LEDD22
LE
LEDD11
LE
LEDD44
LE
LEDD33
LE
UNIT DD
UNIT
UNIT CC
UNIT
SSW
W 22
WIREECHECK
WIR
C HE C K
SSW
W 11
PPUMP
UMPDOWN
DOWN
4–4
AEXM24HR
MISWIRING CHECK
Miswiring check must be performed after installation, reinstallation and
service.
UNIT BB
UNIT
UNIT AA
UNIT
LEDD22
LE
LEDD11
LE
This multi-type air conditioner is designed with a WIRE
CHECK SWITCH on the outdoor unit, and miswiring of unit-to-unit
wiring will be self-corrected by microcomputer.
LED 33
LE
UNIT CC
UNIT
SSW
W 22
WIREECHECK
WIR
C HE C K
Miswiring check may not be performed when the outdoor temperature
is below 5°C .
(1) Complete the unit-to-unit wiring/piping and perform the air
removing of the pipes. Turn the electrical circuit
breaker ON. Before turning the circuit breaker ON,
LEDD44
LE
UNIT DD
UNIT
D
make sure no one is working on the indoor units installation.
Electrical shock or injury may occur.
(2) Check that all LED
on the display board unit are flashing synchronously in a slow
(one flash per second) cycle. If either one or more of all LED
is/are kept lighted on, check and correct the wrong wirings among
N, 1, 2,
terminals so that all LED will flash slowly, showing normal condition.
(3) Press the WIRE CHECK SWITCH (SW2) on the display board
unit for 5 seconds or more. The flashing of all LED will change.
Miswiring (mispiping) check will start and the indoor and outdoor
units will start operating. (The red operation lamp on the indoor
unit will flash, and three BEEP will be emitted. )
Miswiring of unit-to-unit wiring will be self-corrected.
(4) Wrong piping works cannot be corrected, and will be detected as
an error. When an error is detected during checking,
all LED will show triple flash for eight times.
The indoor and outdoor operation will stop. Turn the circuit breaker
OFF and check and correct the miswiring (mispiping)
*. After correction, return to step 1 and repeat the miswiring
(mispiping) check again. If error is still detected,or other types of
LED signal should be indicated, please contact a service
technician. (Refer to wiring diagram attached inside the
outdoor unit cabinet for self diagnosis signal.)
(5) All LED
( LED1, 2, 3, 4) will flash
synchronously in a slow (one flash per second) cycle
when miswiring (mispiping) check is completed with no error
detection (3~6 minutes), and the operation of indoor and outdoor
units will stop .(The red operation lamp flashing on the indoor unit
will go off.)
(6) Place the control box cover back in the reverse order.
*Correction points on error detection
1. Are all piping the total multi air conditioner system connected?
2. Are the stop valves open?
4–5
SSW
W 11
PUMP
P
UMPDOWN
DOWN
AEXM24HR
Service
CHAPTER 5. DISASSEMBLING PROCEDURE
AEXM24HR
[1] OUTDOOR UNIT
Manual
4) Remove the 6 screws fixing the rear guard.
1) Remove the 5 screws fixing the front panel R and slide
the front panel R down.
5) Remove the 11 screws fixing the side cover R.
2) Remove the 10 screws fixing the top cover.
6) Remove the 6 screws fixing the side cabinet L.
3) Remove the 6 screws fixing thefront panel L.
7) Cut the insulators.
8) Remove the 2 screws fixing the control box cover.
Caution: Discharge electrytic capacitor before
touching this capacitor or other components or wirings.
Screws
Cut
5–1
AEXM24HR
9) Disconnect the 7 connectors.
12)Remove the 5 screws fixing the controlbox assembly.
Fan motor / Reverse valve
Thermistor/ Expansion valve
13).Cut the2 insulators.
C ut
10)Remove the compressor cover.
Compressor cover
11)Remove the terminal cover and disconnect 3 terminals.
14)Remove the 3 screws fixing the bulkhead.
note: Caution to the connectors‘ position when reinstalling.
White(C)
thermistor(Red)
Compressor
Red(s)
Orenge(R)
5–2
AEXM24HR
15)Remove the 1 nut fixing the propeller fan.
19)Position of the thermistors
Note :Caution to the position when reinstalling.
L oos e
G reen
16)remove the 2 screws fixing the motor angle.
Orange
B lack
17)Cut the fixing bands.
Yellow
B rown
18)Remove the 4 screws fixing the fan motor.
W hite
B lue
5–3
AEXM24HR
20)How to disassemble the control box assembly
1.Cut the wire fixing band.(3 points)
2. Remove the 4 screws fixing the PWB.
3. Unlock the spacer's lock.
Instal this SHORT-CIRCUIT CONNECTOR
in a new CONTROL PWB at CONTROL PWB exchange.
5–4
AEXM24HR
5–5
AEXM24HR
5–6
AEXM24HR
PartsGuide
PARTS GUIDE
MALTI SPLIT TYPE
ROOM AIR CONDITIONERS
OUTDOOR UNIT
MODELS
AE-XM24HR
CONTENTS
[1]
CONTROL BOX PARTS
[5]
PACKING PARTS
[2]
CABINET AND PARTS
[6]
ACCESSORY PARTS
[3]
CYCLE PARTS
„
INDEX
[4]
OTHER PARTS
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.
AEXM24HR
NO.
PARTS CODE
P R I C E N E W P A R T DESCRIPTION
RANK MARK RANK
[1] CONTROL BOX PARTS
1-6
1-7
1-8
1-9
1-10-1
1-10-2
1-10-3
1-10-4
1-13
1-14
1-15
1-16
1-17
1-18
1-22
1-29
1-30
1-37
1-38
1-41
1-42
1-53
1-55
1-56
1-57
1-64-1
1-64-2
1-74
QW-VZF873JBZZ
QW-VZF814JBZZ
QW-VZF815JBZZ
QW-VZF816JBZZ
QW-VZF817JBZZ
QW-VZF818JBZZ
QW-VZF819JBZZ
RFIL-A064JBE0
RH-VXA002JBZZ
QFS-GA065JBZZ
QFS-GA062JBZZ
QFS-GA063JBZZ
QFS-GA064JBZZ
QSPGCA006JBZZ
FW-VZA073JBKZ
RRLYDA008JBZZ
RRLYDA012JBZZ
QW-VZF823JBZZ
QW-VZF824JBZZ
QW-VZF827JBZZ
QW-VZF828JBZZ
PSPA-A150JBZZ
QW-VZF573JBZZ
QW-VZF821JBZZ
QW-VZF822JBZZ
PSHE-A218JBEZ
PSHE-A273JBEZ
RTRN-A256JBE0
AQ
AF
AF
AF
AH
AH
AF
AF
AF
BA
AF
AE
AF
AH
AV
AH
AR
AF
AF
AL
AL
AF
AH
AH
AH
AP
AF
AG
LEAD WIRE (TB-CN6)
LEAD WIRE (TBN-TBN)
LEAD WIRE (TB1-TB1)
LEAD WIRE (TBE-TBE)
LEAD WIRE (TBN-L3-1)
LEAD WIRE (TBL-T1)
LEAD WIRE (TB1E-BOX)
FERRITE CORE
VARISTOR
FUSE (20A 250V)
FUSE (3.15A 250V)
FUSE (2A 250V)
FUSE (1A 250V)
SURGE ABSORBER
LEAD WIRE (DB-AF1)
RELAY
RELAY
LEAD WIRE (AF1-L2-COIL)
LEAD WIRE (AF1-L1-COIL)
LEAD WIRE (MRY1-DB1AC1)
LEAD WIRE (T6-DB1AC2)
PWB SPACER
LEAD WIRE (DC VOLTAGE)
LEAD WIRE (C10+ - TP)
LEAD WIRE (C10- - TN)
PROTECT SHEET
PROTECT SHEET
TRANSFORMER
2
AEXM24HR
[2] CABINET AND PARTS
2-37
2-23
1-45
2-70
2-40
1-71
1-44
2-24
2-26
1-48
2-20
1-60
2-17
1-12
1-66
1-58
1-36
2-9
1-66
1-63
2-38
2-6
1-5-2
1-61 3-15
1-65
4-1
1-46
2-5
1-70
1-4
1-5-1
1-59
2-39
2-31
1-69
1-4
2-36
1-76
1-62 1-52
2-41
1-62
1-2
4-3
2-19
2-20
4-3
1-11
2-25
2-28
4-1
1-3
4-8
2-1
2-5
2-7
2-4
2-49
2-2
2-48
2-46
2-21
1-1
4-9
2-3
2-12
2-10
2-56
2-52
2-22
2-47
2-61
2-62
4-3
2-9
2-53
2-15
4-3
4-3
2-8
2-13
4-4
4-3
2-57
4-3
2-14
3
2-55
AEXM24HR
NO.
PARTS CODE
PRICE NEW PART
RANK MARK RANK
DESCRIPTION
[2] CABINET AND PARTS
1-1
1-2
1-3
1-4
1-5-1
1-5-2
1-11
1-12
1-36
1-44
1-45
1-46
1-48
1-52
1-58
1-59
1-60
1-61
1-62
1-63
1-65
1-66
1-69
1-70
1-71
1-76
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-12
2-13
2-14
2-15
2-17
2-19
2-20
2-21
2-22
2-23
2-24
2-25
2-26
2-28
2-31
2-36
2-37
2-38
2-39
2-40
2-41
2-46
2-47
2-48
2-49
2-52
2-53
2-55
2-56
2-57
2-61
2-62
2-70
3-15
4-1
4-3
4-4
4-8
4-9
CMOTLB051JBEZ
LANG-A540JBWZ
LHLD-A539JBFA
LHLD-A544JBFA
QTANZA044JBZZ
QTANZA021JBZZ
DBOX-A044JBWZ
DSGY-C285JBKZ
PRDAFA207JBEZ
RH-TXA008JBZZ
VHDD25VB60+-1
DSGY-C167JBKZ
DSGY-C010JBKZ
PRDAFA206JBEZ
RHOG-A169JBE0
LBNDKA113JBWZ
LHLD-A656JBFZ
LHLDWA039JBEZ
LHLDWA040JBEZ
LX-BZA075JBE0
PSPA-A146JBE0
PSPA-A173JBEZ
RH-HXA081JBZZ
RC-AZA046JBE0
RTRN-A300JBZZ
PSPA-A082JBE0
LANGKA164JBPZ
LANGKA165JBPZ
LANGKA166JBPZ
LANGKA163JBPZ
LSUB-A029JBPZ
LSUB-A030JBPZ
PSEL-C642JBEZ
GCAB-A303JBTA
JHNDPA016JBFA
PSEL-C637JBEZ
GCAB-A247JBTB
GGADFA028JBTA
CCHS-A862JBKZ
GLEGMA043JBTB
GPLTMA062JBTB
GPLTMA066JBTA
PSEL-C641JBEZ
PSEL-C597JBEZ
PSKR-A327JBWZ
GCAB-A248JBTB
PSEL-C598JBEZ
PSEL-C640JBEZ
PSEL-C702JBEZ
GGADRA001JBTA
LHLD-A574JBFA
NFANPA108JBFA
PCOV-A940JBWZ
PSEL-C282JBEZ
PSEL-C373JBEZ
PSEL-C634JBEZ
PSEL-C635JBEZ
PSPF-A908JBEZ
PSPF-A898JBEZ
PSPF-A910JBEZ
PSPF-A911JBEZ
TLABBA146JBRA
TLABCC373JBRZ
TSPC-F845JBRZ
PSEL-C760JBEZ
PSEL-C761JBEZ
TLAB-D234JBRZ
TLAB-C773JBRZ
TLAB-D257JBEZ
PCON-A553JBPZ
LX-BZA140JBE0
LX-BZA364JBEZ
LX-BZA380JBEZ
LX-NZA319JBEZ
LX-BZA363JBEZ
BX
AU
AE
AG
AU
AN
AT
CB
BC
BR
AN
AZ
BW
BA
AK
AS
AQ
AC
AC
AA
AC
AE
BA
BE
BK
AB
AQ
AN
AQ
AX
AE
AE
AA
BE
AE
AD
BE
AZ
BK
AX
AX
BC
AD
AC
BA
BB
AK
AG
AE
AV
AE
BA
AP
AD
AC
AE
AD
AT
AR
AF
AG
AP
AF
AL
AB
AB
AR
AN
AF
CC
AB
AC
AK
AE
AE
FAN MOTOR
TERMINAL BOARD ANGLE
CORD HOLDER
CORD CLAMP HOLDER
TERMINAL BOARD
TERMINAL BOARD
CONTROL BOX ASS'Y
CONTROL BOARD UNIT
HAET SINK
ACTIVE FILTER (AF1)
DIODE BRIDGE
DISPLAY BOARD UNIT
IPM30A BOARD
HEAT SINK
PROTECTOR
CAPACITOR CLAMP
HEAT SINK HOLDER
WIRE H0LDER
WIRE H0LDER
SPECIAL SCREW
SPACER
PWB SPACER
THERMISTOR ASS'Y
ELECTROLYTIC CAP.
ACTIVE COIL
SPACER
MOTOR BASE
MOTOR ANGLE
MOTOR ANGLE B
MOTOR ANGLE T
MOTOR ANGLE SUB A
MOTOR ANGLE SUB B
M.ANG SUB A SEAL
FRONT PANEL R
HANDLE
FRONT PANEL SEAL A
FRONT PANEL L
FAN GUARD
BASE PAN ASS'Y
BASE STAND
SIDE CABINET L
SIDE COVER R
SIDE COVER R SEAL
BULKHEAD INSULATOR
BULKHEAD
TOP COVER
TOP COVER SEAL A
TOP COVER SEAL B
TOP COVER SEAL C
REAR GUARD
THERMISTOR HOLDER
PROPELLER FAN
CONTROL BOX COVER
CUSHION
SEAL
PANEL SEAL A
PANEL SEAL B
COMPRESSOR COVER A
COMPRESSOR COVER B
COMPRESSOR COVER C
COMPRESSOR COVER D
BADGE
WIRING DIAGRAM
NAME LABEL
FR. PANEL L SEAL A
BASE PAN SEAL A
SERVICE LABEL
LABEL
EU ENERGY LABEL
CONDENSER
SPECIAL SCREW
SPECIAL SCREW
SPECIAL SCREW
SPECIAL NUT
SPECIAL SCREW
4
AEXM24HR
[3] CYCLE PARTS
3-14
3-21
3-8
3-35 3-25
2-34
1-69
3-9
3-24
1-54
3-10
3-7
3-17
1-78
2-35
2-33
3-12
3-1-1
3-17
3-23
1-73
3-1-1
3-17
3-1-1
4-6
3-17
3-22
2-67
3-13
2-69
3-1-1
2-68
3-33
3-11
3-31
2-30
3-34
3-30
3-32
3-28
2-66
2-30
3-34
3-30
3-32
2-63
3-28
3-2
3-30
2-30
3-34
3-32
3-28
4-5
3-34
3-30
2-64
3-29
3-5
3-32
3-5-1
2-30
2-16
3-5-2
5
AEXM24HR
NO.
PARTS CODE
PRICE NEW PART
RANK MARK RANK
DESCRIPTION
[3] CYCLE PARTS
1-54
1-69
1-73
1-78
2-16
2-30
2-33
2-34
2-35
2-63
2-64
2-66
2-67
2-68
2-69
3-1-1
3-2
3-5
3-5-1
3-5-2
3-7
3-8
3-9
3-10
3-11
3-12
3-13
3-14
3-17
3-21
3-22
3-23
3-24
3-25
3-28
3-29
3-30
3-31
3-32
3-33
3-34
3-35
4-5
4-6
QW-IZA112JBZZ
RH-HXA081JBZZ
RTHM-A022JBE0
RH-HXA092JBZZ
PDAI-A177JBTB
LSUB-A020JBWZ
MSPR-A026JBE0
MSPR-A036JBE0
MSPR-A046JBE0
TLAB-C770JBRA
TLAB-B709JBRA
PSEL-C006JBEZ
PGUM-A119JBEZ
PGUM-A120JBEZ
MSPR-A129JBE0
PVLVRA040JBEZ
DVLV-A668JBKZ
DVLV-A669JBKZ
LX-NZA228JBEZ
LX-NZA227JBEZ
DVLV-A847JBKZ
CCIL-A112JBEZ
LX-BZA268JBEZ
PACU-A043JBEZ
GLEG-A029JBE0
LBSHCA005JBE0
PCMPRA563JBEZ
PCOV-0562JBE0
RMOTSA031JBZZ
PVLVXA061JBEZ
PGUMSA319JBEZ
PMUF-A081JBEZ
PGUM-A121JBEZ
PGUM-A122JBEZ
DVLV-A841JBKZ
DVLV-A842JBKZ
DVLV-A843JBKZ
LX-NZA250JBEZ
LX-NZA251JBEZ
PCAP-A083JBEZ
PCAP-A084JBEZ
PTUB-A196JBEZ
LX-BZA078JBE0
LX-NZA313JBEZ
AZ
BA
AN
BC
BB
AE
AB
AB
AC
AR
AH
AC
AG
AG
AD
BM
AZ
AW
AD
AF
BD
AX
AB
BW
AK
AD
CT
AG
BC
BD
AF
AY
AG
AG
AZ
AZ
AZ
AE
AG
AC
AC
AK
AB
AE
COMPRESSOR CORD
THERMISTOR ASS'Y
THERMISTOR
THERMISTOR
FLARE COUPLING BASE
FLARE CUP.SUB-S
THERMISTOR SPRING
THERMISTOR SPRING
PROTECTOR SPRING
UNIT LABEL
LABEL
INSULATOR
VALVE RUBBER
VALVE RUBBER
CYCLE SPRING
EXPANSION VALVE
3WAY VALVE UNIT
3WAY VALVE UNIT
SERVICE NUT
BONNET
REVERSE VALVE ASS'Y
COIL
SPECIAL SCREW
ACCUMULATOR
CPMPRESSOR CUSHION
TERMINAL BUSHING
COMPRESSOR
TERMINAL COVER
COIL
REVERSE VALVE
DAMPER RUBBER
MUFFLER
RUBBER
RUBBER
FLARE UNION UNIT 3S
FLARE UNION UNIT 3S
FLARE UNION UNIT 2S
FLARE NUT
FLARE NUT
NUT BONNET
NUT BONNET
PIPE INSULATOR
SPECIAL SCREW
SPECIAL NUT
AF
AF
CU
LABEL
LABEL
COMPRESSOR ASS'Y
[4] OTHER PARTS
1-86
1-90
3-27
TLAB-D247JBRZ
TLAB-D231JBRZ
FCMPRA240JBKZ
[5] PACKING PARTS
5-2
5-3
5-1
6
AEXM24HR
NO.
PRICE NEW PART
RANK MARK RANK
PARTS CODE
DESCRIPTION
[5] PACKING PARTS
5-1
5-2
5-3
CPADBA072JBKZ
CPADBA073JBKZ
SPAKCC381JBEZ
BOTTOM PAD ASS'Y
PACKING PAD ASS'Y
PACKING CASE
AR
AH
BE
[6] ACCESSORY PARTS
6-5
6-1
6-7
NO.
PARTS CODE
6-8
6-6
6-10
6-9
PRICE NEW PART
RANK MARK RANK
DESCRIPTION
[6] ACCESSORY PARTS
6-1
6-1
6-1
6-5
6-6
6-7
6-8
6-9
6-10
TINS-B107JBRZ
TINS-B108JBRZ
TINS-B109JBRZ
LX-BZA140JBE0
GFTASA002JBFA
LBND-A046JBE0
LPFT-A134JBFZ
LPFT-A135JBFZ
PTUB-A218JBEZ
AC
AH
AH
AB
AM
AE
AF
AH
AB
INSTALLATION MANUAL
INSTALLATION MANUAL
INSTALLATION MANUAL
SPECIAL SCREW
CABLE COVER
WIRE FIXING BAND
DRAIN JOINT
DRAIN TRAY
TUBE INSULATOR
7
AEXM24HR
„INDEX
PARTS CODE
[ C ]
CCHS-A862JBKZ
CCIL-A112JBEZ
CMOTLB051JBEZ
CPADBA072JBKZ
CPADBA073JBKZ
[ D ]
DBOX-A044JBWZ
DSGY-C010JBKZ
DSGY-C167JBKZ
DSGY-C285JBKZ
DVLV-A668JBKZ
DVLV-A669JBKZ
DVLV-A841JBKZ
DVLV-A842JBKZ
DVLV-A843JBKZ
DVLV-A847JBKZ
[ F ]
FCMPRA240JBKZ
FW-VZA073JBKZ
[ G ]
GCAB-A247JBTB
GCAB-A248JBTB
GCAB-A303JBTA
GFTASA002JBFA
GGADFA028JBTA
GGADRA001JBTA
GLEG-A029JBE0
GLEGMA043JBTB
GPLTMA062JBTB
GPLTMA066JBTA
[ J
JHNDPA016JBFA
[ L
LANG-A540JBWZ
LANGKA163JBPZ
LANGKA164JBPZ
LANGKA165JBPZ
LANGKA166JBPZ
LBND-A046JBE0
LBNDKA113JBWZ
LBSHCA005JBE0
LHLD-A539JBFA
LHLD-A544JBFA
LHLD-A574JBFA
LHLD-A656JBFZ
LHLDWA039JBEZ
LHLDWA040JBEZ
LPFT-A134JBFZ
LPFT-A135JBFZ
LSUB-A020JBWZ
LSUB-A029JBPZ
LSUB-A030JBPZ
LX-BZA075JBE0
LX-BZA078JBE0
LX-BZA140JBE0
"
LX-BZA268JBEZ
LX-BZA363JBEZ
LX-BZA364JBEZ
LX-BZA380JBEZ
LX-NZA227JBEZ
LX-NZA228JBEZ
LX-NZA250JBEZ
LX-NZA251JBEZ
LX-NZA313JBEZ
LX-NZA319JBEZ
[ M
MSPR-A026JBE0
MSPR-A036JBE0
MSPR-A046JBE0
MSPR-A129JBE0
[ N
NFANPA108JBFA
[ P
PACU-A043JBEZ
PCAP-A083JBEZ
PCAP-A084JBEZ
PCMPRA563JBEZ
No.
PRICE NEW PART
RANK MARK RANK
2-2-14
3-3-8
2-1-1
5-5-1
5-5-2
BK
AX
BX
AR
AH
2-1-11
2-1-48
2-1-46
2-1-12
3-3-2
3-3-5
3-3-28
3-3-29
3-3-30
3-3-7
AT
BW
AZ
CB
AZ
AW
AZ
AZ
AZ
BD
4-3-27
1-1-22
CU
AV
2-2-12
2-2-23
2-2-8
6-6-6
2-2-13
2-2-28
3-3-11
2-2-15
2-2-17
2-2-19
BE
BB
BE
AM
AZ
AV
AK
AX
AX
BC
2-2-9
AE
2-1-2
2-2-4
2-2-1
2-2-2
2-2-3
6-6-7
2-1-59
3-3-12
2-1-3
2-1-4
2-2-31
2-1-60
2-1-61
2-1-62
6-6-8
6-6-9
3-2-30
2-2-5
2-2-6
2-1-63
3-4-5
2-4-1
6-6-5
3-3-9
2-4-9
2-4-3
2-4-4
3-3-5-2
3-3-5-1
3-3-31
3-3-32
3-4-6
2-4-8
AU
AX
AQ
AN
AQ
AE
AS
AD
AE
AG
AE
AQ
AC
AC
AF
AH
AE
AE
AE
AA
AB
AB
AB
AB
AE
AC
AK
AF
AD
AE
AG
AE
AE
3-2-33
3-2-34
3-2-35
3-2-69
AB
AB
AC
AD
2-2-36
BA
3-3-10
3-3-33
3-3-34
3-3-13
BW
AC
AC
CT
PARTS CODE
PCON-A553JBPZ
PCOV-0562JBE0
PCOV-A940JBWZ
PDAI-A177JBTB
PGUM-A119JBEZ
PGUM-A120JBEZ
PGUM-A121JBEZ
PGUM-A122JBEZ
PGUMSA319JBEZ
PMUF-A081JBEZ
PRDAFA206JBEZ
PRDAFA207JBEZ
PSEL-C006JBEZ
PSEL-C282JBEZ
PSEL-C373JBEZ
PSEL-C597JBEZ
PSEL-C598JBEZ
PSEL-C634JBEZ
PSEL-C635JBEZ
PSEL-C637JBEZ
PSEL-C640JBEZ
PSEL-C641JBEZ
PSEL-C642JBEZ
PSEL-C702JBEZ
PSEL-C760JBEZ
PSEL-C761JBEZ
PSHE-A218JBEZ
PSHE-A273JBEZ
PSKR-A327JBWZ
PSPA-A082JBE0
PSPA-A146JBE0
PSPA-A150JBZZ
PSPA-A173JBEZ
PSPF-A898JBEZ
PSPF-A908JBEZ
PSPF-A910JBEZ
PSPF-A911JBEZ
PTUB-A196JBEZ
PTUB-A218JBEZ
PVLVRA040JBEZ
PVLVXA061JBEZ
[ Q ]
QFS-GA062JBZZ
QFS-GA063JBZZ
QFS-GA064JBZZ
QFS-GA065JBZZ
QSPGCA006JBZZ
QTANZA021JBZZ
QTANZA044JBZZ
QW-IZA112JBZZ
QW-VZF573JBZZ
QW-VZF814JBZZ
QW-VZF815JBZZ
QW-VZF816JBZZ
QW-VZF817JBZZ
QW-VZF818JBZZ
QW-VZF819JBZZ
QW-VZF821JBZZ
QW-VZF822JBZZ
QW-VZF823JBZZ
QW-VZF824JBZZ
QW-VZF827JBZZ
QW-VZF828JBZZ
QW-VZF873JBZZ
[ R ]
RC-AZA046JBE0
RFIL-A064JBE0
RH-HXA081JBZZ
"
RH-HXA092JBZZ
RHOG-A169JBE0
RH-TXA008JBZZ
RH-VXA002JBZZ
RMOTSA031JBZZ
RRLYDA008JBZZ
RRLYDA012JBZZ
RTHM-A022JBE0
RTRN-A256JBE0
RTRN-A300JBZZ
]
]
]
]
]
8
No.
PRICE NEW PART
RANK MARK RANK
2-3-15
3-3-14
2-2-37
3-2-16
3-2-67
3-2-68
3-3-24
3-3-25
3-3-22
3-3-23
2-1-52
2-1-36
3-2-66
2-2-38
2-2-39
2-2-21
2-2-24
2-2-40
2-2-41
2-2-10
2-2-25
2-2-20
2-2-7
2-2-26
2-2-56
2-2-57
1-1-64-1
1-1-64-2
2-2-22
2-1-76
2-1-65
1-1-53
2-1-66
2-2-47
2-2-46
2-2-48
2-2-49
3-3-35
6-6-10
3-3-1-1
3-3-21
CC
AG
AP
BB
AG
AG
AG
AG
AF
AY
BA
BC
AC
AD
AC
AC
AK
AE
AD
AD
AG
AD
AA
AE
AB
AB
AP
AF
BA
AB
AC
AF
AE
AR
AT
AF
AG
AK
AB
BM
BD
1-1-15
1-1-16
1-1-17
1-1-14
1-1-18
2-1-5-2
2-1-5-1
3-1-54
1-1-55
1-1-7
1-1-8
1-1-9
1-1-10-1
1-1-10-2
1-1-10-3
1-1-56
1-1-57
1-1-37
1-1-38
1-1-41
1-1-42
1-1-6
AF
AE
AF
BA
AH
AN
AU
AZ
AH
AF
AF
AF
AH
AH
AF
AH
AH
AF
AF
AL
AL
AQ
2-1-70
1-1-10-4
2-1-69
3-1-69
3-1-78
2-1-58
2-1-44
1-1-13
3-3-17
1-1-29
1-1-30
3-1-73
1-1-74
2-1-71
BE
AF
BA
BA
BC
AK
BR
AF
BC
AH
AR
AN
AG
BK
AEXM24HR
PARTS CODE
[ S ]
SPAKCC381JBEZ
[ T ]
TINS-B107JBRZ
TINS-B108JBRZ
TINS-B109JBRZ
TLAB-B709JBRA
TLABBA146JBRA
TLAB-C770JBRA
TLAB-C773JBRZ
TLABCC373JBRZ
TLAB-D231JBRZ
TLAB-D234JBRZ
TLAB-D247JBRZ
TLAB-D257JBEZ
TSPC-F845JBRZ
[ V ]
VHDD25VB60+-1
No.
PRICE NEW PART
RANK MARK RANK
5-5-3
BE
6-6-1
6-6-1
6-6-1
3-2-64
2-2-52
3-2-63
2-2-62
2-2-53
4-1-90
2-2-61
4-1-86
2-2-70
2-2-55
AC
AH
AH
AH
AP
AR
AN
AF
AF
AR
AF
AF
AL
2-1-45
AN
9
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