User manual | Service Manual - inventor

Service Manual
B2VI-09 - B2VO-09
B2VI-12 - B2VO-12
C2VI-09 - C2VO-09
C2VI-12 - C2VO-12
GREE ELECTRIC APPLIANCES,INC.OF ZHUHAI
Service Manual
Table of Contents
Part ĉ : Technical Information ............................................................................ 1
1. Summary ........................................................................................................................... 1
6SHFL¿FDWLRQV ............................................................................................................... 4
6SHFL¿FDWLRQ6KHHW................................................................................................................ 4
2SHUDWLRQ&KDUDFWHULVWLF&XUYH ........................................................................................... 10
&DSDFLW\9DULDWLRQ5DWLR$FFRUGLQJWR7HPSHUDWXUH ............................................................ 10
&RROLQJDQG+HDWLQJ'DWD6KHHWLQ5DWHG)UHTXHQF\ ........................................................ 11
1RLVH&XUYH......................................................................................................................... 11
3. Outline Dimension Diagram ............................................................................................ 12
3.1 Indoor Unit........................................................................................................................... 12
2XWGRRU8QLW ........................................................................................................................ 12
4. Refrigerant System Diagram ......................................................................... 14
5. Electrical Part.............................................................................................................. 15
5.1 Wiring Diagram.................................................................................................................... 15
5.2 PCB Printed Diagram .......................................................................................................... 18
6. Function and Control ........................................................................................... 20
5HPRWH&RQWUROOHU,QWURGXFWLRQ .......................................................................................... 20
%ULHI'HVFULSWLRQRI0RGHVDQG)XQFWLRQV........................................................................... 24
Part Ċ : Installation and Maintenance ...................................................... 30
7. Notes for Installation and Maintenance............................................... 30
8. Installation ..................................................................................................................... 32
8.1 Installation Dimension Diagram........................................................................................... 32
,QVWDOODWLRQ3DUWVFKHFNLQJ ................................................................................................. 34
8.3 Selection of Installation Location......................................................................................... 34
(OHFWULF&RQQHFWLRQ5HTXLUHPHQW........................................................................................ 34
8.5 Installation of Indoor Unit..................................................................................................... 34
,QVWDOODWLRQRI2XWGRRU8QLW.................................................................................................. 37
Table of contents
Service Manual
9DFXXP3XPSLQJDQG/HDN'HWHFWLRQ ................................................................................ 38
&KHFNDIWHU,QVWDOODWLRQDQG7HVW2SHUDWLRQ ........................................................................ 38
9. Maintenance ................................................................................................................. 39
9.1 Error Code List .................................................................................................................... 39
7URXEOHVKRRWLQJIRU0DLQ0DOIXQFWLRQ ................................................................................. 46
7URXEOHVKRRWLQJIRU1RUPDO0DOIXQFWLRQ.............................................................................. 61
10. Exploded View and Parts’ List .................................................................. 63
10.1 Indoor Unit......................................................................................................................... 63
2XWGRRU8QLW ...................................................................................................................... 78
11. Removal Procedure ............................................................................................ 86
5HPRYDO3URFHGXUHRI,QGRRU8QLW .................................................................................... 86
5HPRYDO3URFHGXUHRI2XWGRRU8QLW ................................................................................. 89
Appendix: ............................................................................................................................. 94
$SSHQGL[5HIHUHQFH6KHHWRI&HOVLXVDQG)DKUHQKHLW ......................................................... 94
$SSHQGL[&RQ¿JXUDWLRQRI&RQQHFWLRQ3LSH.......................................................................... 94
Appendix 3: Pipe Expanding MHWKRG ........................................................................................ 95
$SSHQGL[/LVWRI5HVLVWDQFHIRU$PELHQW7HPSHUDWXUH6HQVRU ............................................. 96
Table of contents
Service Manual
Part
: Technical Information
1. Summary
Indoor Unit:
C2VI-09
C2VI-12
GWH09MB-K3DNA2K/I
GWH12MB-K3DNA2K/I
B2VI-09
B2VI-12
GWH09MB-K3DNE1K/I
GWH12MB-K3DNE1K/I
GWH12MB-K3DND3K/I
GWH09MB-K3DNA4K/I
GWH12MB-K3DNA4K/I
GWH09MB-K3DNA5K/I
GWH12MB-K3DNA5K/I
1
Service Manual
GWH09MB-K3DNB3K/I
GWH12MB-K3DNB3K/I
GWH09MB-K3DNC8K
GWH12MB-K3DNC8K
Outdoor Unit:
GWH09MB-K3DNA3K/O(CB171W07600)
GWH12MB-K3DNA3K/O(CB171W07700)
GWH09MB-K3DNA3K/O(CB171W07602)
GWH12MB-K3DNA3K/O(CB171W07702)
Remote Controller:
MODE
ON OFF
FA N
C LOCK
2
TIMER ON
X-F AN
T EMP
TIMER OF F
T URBO
SLEEP
LIGH T
Service Manual
Model
GWH09MB-K3DNA2K
GWH09MB-K3DNA3K
GWH09MB-K3DNA4K
GWH09MB-K3DNA4K
GWH09MB-K3DNA5K
GWH09MB-K3DNA5K
GWH09MB-K3DNB3K
GWH09MB-K3DNC9K
GWH09MB-K3DNE1K
GWH09MB-K3DNC8K
GWH09MB-K3DNC8K
GWH12MB-K3DNA2K
GWH12MB-K3DNA3K
GWH12MB-K3DNA4K
GWH12MB-K3DNA4K
GWH12MB-K3DNA5K
GWH12MB-K3DNA5K
GWH12MB-K3DNB3K
GWH12MB-K3DNC9K
GWH12MB-K3DND3K
GWH12MB-K3DNE1K
GWH12MB-K3DNC8K
GWH12MB-K3DNC8K
CB181005700
CB171007600
CB161005902
CB161005901
CB162006700
CB162006702
CB163005501
CB145003600
CB143001300
CB192000200
CB192000201
CB181005800
CB171007700
CB161006001
CB161006002
CB162006800
CB162006802
CB163005601
CB145003700
CB405002901
CB143001400
CB192000300
CB192000301
IndoorUnit
GWH09MB-K3DNA2K/I
GWH09MB-K3DNA3K/I
GWH09MB-K3DNA4K/I
GWH09MB-K3DNA4K/I
GWH09MB-K3DNA5K/I
GWH09MB-K3DNA5K/I
GWH09MB-K3DNB3K/I
GWH09MB-K3DNC9K/I
GWH09MB-K3DNE1K/I
GWH09MB-K3DNC8K/I
GWH09MB-K3DNC8K/I
GWH12MB-K3DNA2K/I
GWH12MB-K3DNA3K/I
GWH12MB-K3DNA4K/I
GWH12MB-K3DNA4K/I
GWH12MB-K3DNA5K/I
GWH12MB-K3DNA5K/I
GWH12MB-K3DNB3K/I
GWH12MB-K3DNC9K/I
GWH12MB-K3DND3K/I
GWH12MB-K3DNE1K/I
GWH12MB-K3DNC8K/I
GWH12MB-K3DNC8K/I
CB181N05700
CB171N07600
CB161N05901
CB161N05901
CB162N06700
CB162N06700
CB163N05501
CB145N03600
CB143N01300
CB192N00200
CB192N00201
CB181N05800
CB171N07700
CB161N06001
CB161N06001
CB162N06800
CB162N06800
CB163N05601
CB145N03700
CB405N02901
CB143N01400
CB192N00300
CB192N00301
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH09MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
CB171W07600
CB171W07600
CB171W07602
CB171W07600
CB171W07600
CB171W07602
CB171W07600
CB171W07600
CB171W07600
CB171W07600
CB171W07600
CB171W07700
CB171W07700
CB171W07700
CB171W07702
CB171W07700
CB171W07702
CB171W07700
CB171W07700
CB171W07700
CB171W07700
CB171W07700
CB171W07700
3
Service Manual
V~
GWH09MB-K3DNA4K
GWH09MB-K3DNA5K
CB161005902
CB162006702
220-240
GWH12MB-K3DNA4K
GWH12MB-K3DNA5K
CB161006002
CB162006802
220-240
Hz
50
50
Model
Power
Rated Voltage
Cooling Capacity (Min~Max)
Heating Capacity (Min~Max)
1
1
Indoor
Indoor
W
2700(600~3200)
3500(600~3900)
4000(880~4400)
W
2800(800~3600)
W
870(185~1300)
1170(185~1400)
W
900(220~1400)
1200(250~1550)
5.2
A
3.8
A
3.92
5.3
W
1400
1600
A
m3
6.69
7.8
600/500/400/300/-
580/500/400/300/-
0.8
1.2
EER
W/W
3.10
2.99
COP
W/W
3.11
3.33
SEER
W/W
5.6
6.1
Application Area
W/W
3.8
4.0
m2
12-18
GWH09MB-K3DNA4K/I
GWH09MB-K3DNA5K/I
16-24
GWH12MB-K3DNA4K/I
GWH12MB-K3DNA5K/I
r/min
1260/1050/900/690/-
1290/1070/900/690/-
r/min
1320/1200/1000/910/-
1280/1050/980/920/-
W
20
20
A
0.1
0.1
1.0
1.0
-
-
2-1.4
2-1.4
MP24AA
MP24AA
Model of Indoor Unit
mm
W
Indoor
Unit
Pipe Diameter
mm
mm
mm
Swing Motor Model
W
2
2
A
3.15
3.15
dB (A)
41/39/34/28/-
42/40/35/30/-
dB (A)
54/50/45/40/-
54/51/45/42/-
9
9
12
12
mm
mm
mm
4
Service Manual
GWH09MB-K3DNA3K/O
GWH12MB-K3DNA3K/O
CB171W07602
CB171W07702
ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR
CO., LTD.
CO., LTD.
Compressor Model
Compressor Oil
Compressor Type
Rotary
Rotary
16.5
L.R.A.
A
16.5
Compressor RLA
A
4.9
4.9
W
950
950
1NT11L-6233
1NT11L-6233
16~30
16~30
Operation temp
ºC
Ambient temp (Cooling)
ºC
-7~43
-7~43
Ambient temp (Heating)
ºC
-15~24
-15~24
Pipe Diameter
mm
1-1.4
2-1.4
rpm
900/650
900/650
W
30
30
A
0.15
0.15
/
/
m3
1800
1800
T1
T1
mm
mm
Unit
mm
Climate Type
Isolation
I
I
IP24
IP24
MPa
4.3
4.3
MPa
2.5
2.5
dB (A)
51/-/-
53/-/-
dB (A)
63/-/-
63/-/-
28.0
29.0
mm
mm
mm
Refrigerant
Connectio
n Pipe
32.0
33.0
R410A
R410A
0.7
0.85
m
5
5
g/m
20
20
m
10
10
m
15
15
mm
mm
5
Service Manual
B2VI-09 / B2VO-09
C2VI-09 / C2VO-09
Model
CB145003600
Power
Rated Voltage
V~
220-240
Hz
50
1
Indoor
Cooling Capacity (Min~Max)
Heating Capacity (Min~Max)
W
2700(600~3200)
W
2800(800~3600)
W
870(185~1300)
W
900(220~1400)
A
3.8
A
3.92
W
1400
A
m3
6.69
600/500/400/300/0.8
EER
W/W
3.10
COP
W/W
3.11
SEER
W/W
5.6
Application Area
W/W
3.8
m2
12-18
Model of Indoor Unit
B2VI-09
C2VI-09
mm
r/min
1260/1050/900/690/-
r/min
1320/1200/1000/910/-
W
20
A
0.1
1.0
W
Indoor
Unit
Pipe Diameter
-
mm
mm
2-1.4
mm
Swing Motor Model
MP24AA
W
2
A
3.15
dB (A)
41/39/34/28/-
dB (A)
54/50/45/40/-
mm
mm
mm
9
12
6
Service Manual
B2VO-09 / C2VO-09
CB171W07600
ZHUHAI LANDA COMPRESSOR CO., LTD.
Compressor Model
Compressor Oil
Compressor Type
Rotary
L.R.A.
A
Compressor RLA
A
16.5
4.9
W
950
1NT11L-6233
Operation temp
ºC
Ambient temp (Cooling)
ºC
-7~43
Ambient temp (Heating)
ºC
-10~24
Pipe Diameter
16~30
mm
mm
1-1.4
mm
rpm
Unit
900/660
W
30
A
0.15
m3
1800
/
mm
Climate Type
T1
Isolation
I
IP24
MPa
4.3
MPa
2.5
dB (A)
51/-/-
dB (A)
63/-/-
mm
mm
mm
28.0
32.0
Refrigerant
R410A
0.7
Connectio
n Pipe
m
5
g/m
20
mm
mm
m
10
m
15
7
Service Manual
B2VI-12 / B2VO-12
C2VI-12 / C2VO-12
Model
CB145003700
Power
Rated Voltage
V~
220-240
Hz
50
1
Indoor
Cooling Capacity (Min~Max)
W
3500(600~3900)
Heating Capacity (Min~Max)
W
4000(880~4400)
W
1170(185~1400)
W
1200(250~1550)
A
5.1
A
5.22
W
1600
A
7.8
3
580/500/400/300/-
EER
W/W
2.99
COP
W/W
3.33
SEER
W/W
6.1
W/W
4.0
m
1.2
Application Area
2
m
Model of Indoor Unit
16-24
B2VI-12
mm
r/min
1290/1070/900/690/-
r/min
1280/1050/980/920/-
W
20
A
0.1
1.0
W
Indoor
Unit
Pipe Diameter
-
mm
mm
2-1.4
mm
Swing Motor Model
MP24AA
W
2
A
3.15
dB (A)
42/40/35/30/-
dB (A)
54/51/45/42/-
mm
mm
mm
9
12
8
Service Manual
B2VO-12 / C2VO-12
CB171W07700
ZHUHAI LANDA COMPRESSOR CO., LTD.
Compressor Model
Compressor Oil
Compressor Type
Rotary
L.R.A.
A
Compressor RLA
A
16.5
4.9
W
950
1NT11L-6233
Operation temp
ºC
Ambient temp (Cooling)
ºC
-7~43
Ambient temp (Heating)
ºC
-10~24
Pipe Diameter
16~30
mm
mm
2-1.4
mm
rpm
Unit
900/660
W
30
A
0.15
m3
2000
/
mm
Climate Type
T1
Isolation
I
IP24
MPa
4.3
MPa
2.5
dB (A)
53/-/-
dB (A)
63/-/-
mm
mm
mm
29.0
33.0
Refrigerant
R410A
0.85
Connectio
n Pipe
m
5
g/m
20
mm
mm
m
10
m
15
9
Service Manual
2.2 Operation Characteristic Curve
Cooling
Heating
8
10
9
7
8
6
12K
12K
7
5
Current(A)
Current(A)
6
09K
5
4
3
Condition
Indoor:DB 27 WB19
Indoor air flow: Turbo
Pipe length:5m
Voltage:230V
2
09K
4
3
Condition
Indoor:DB 20
Indoor air flow:Turbo
Pipe length:5m
Voltage:230V
2
1
1
0
0
0
20
40
60
80
100
0
120
20
Compressor Speed(rps)
40
60
80
100
120
Compressor Speed(rps)
2.3 Capacity Variation Ratio According to Temperature
Heating
110
120
100
100
90
80
Capacity ratio(%)
Capacity ratio(%)
Cooling
80
70
60
Condition
Indoor:DB27℃ WB19℃
Indoor air flow: Turbo
Pipe length:5m
50
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
Outdoor temp. (°C)
10
60
40
Condition
Indoor:DB20℃
Indoor air flow: Turbo
Pipe length:5m
20
0
-7
-5
0
5
10
Outdoor temp. (°C)
7HFKQLFDO,QIRUPDWLRQ
Service Manual
2.4 Cooling and Heating Data Sheet in Rated Frequency
Cooling:
Rated cooling
condition(°C) (DB/WB)
Indoor
27/19
Model
3UHVVXUHRIJDVSLSH
,QOHWDQGRXWOHWSLSH
connecting indoor and
WHPSHUDWXUHRIKHDW
RXWGRRUXQLW
H[FKDQJHU
2XWGRRU
35/24
P (MPa)
09K
12K
0.9~1.1
T1 (°C)
12 to 15
11 to 14
T2 (°C)
65 to 38
64 to 37
)DQVSHHGRI )DQVSHHGRI
LQGRRUXQLW
RXWGRRUXQLW
TURBO
+LJK
Compressor
UHYROXWLRQUSV
54
60
Heating:
5DWHGKHDWLQJ
condition(°C) (DB/WB)
Indoor
2XWGRRU
20/-
7/6
Model
3UHVVXUHRIJDVSLSH
,QOHWDQGRXWOHWSLSH
connecting indoor and
WHPSHUDWXUHRIKHDW
RXWGRRUXQLW
P (MPa)
H[FKDQJHU
T1 (°C)
T2 (°C)
09K
12K
2.2~2.4
35 to 63
35 to 65
2 to 5
2 to 5
)DQVSHHGRI )DQVSHHGRI
LQGRRUXQLW
RXWGRRUXQLW
TURBO
+LJK
Compressor
UHYROXWLRQUSV
62
66
Instruction:
7,QOHWDQGRXWOHWSLSHWHPSHUDWXUHRIHYDSRUDWRU
7,QOHWDQGRXWOHWSLSHWHPSHUDWXUHRIFRQGHQVHU
33UHVVXUHDWWKHVLGHRIELJYDOYH
&RQQHFWLRQSLSHOHQJWKP
2.5 Noise Curve
Indoor side noise when blowing
Outdoor side noise when Compressor speed changed
45
55
Noise/dB(A)
Noise/dB(A)
40
35
30
25
Supper High
High
Middle
Indoor fan motor rotating speed
7HFKQLFDO,QIRUPDWLRQ
Low
09K
12K
50
45
20
30
40
50
60
70 75
Compressor Speed(rps)
11
Service Manual
3. Outline Dimension Diagram
3.1 Indoor Unit
845
180
275
130
542
173
Φ55
Φ55
45
45
143
80
3.2 Outdoor Unit
B2VO-09 / C2VO-09 / B2VO-12 / C2VO-12
714
320
776
286
540
257
510
12
Unit:mm
Service Manual
GWH09MB-K3DNA3K/O(CB171W07602), GWH12MB-K3DNA3K/O(CB171W07702)
714
320
776
286
540
257
510
Unit:mm
13
Service Manual
4. Refrigerant System Diagram
Cooling and heating model
Outdoor unit
Indoor unit
Gas pipe
side
Valve
4-Way valve
Discharge
Heat
exchanger
(evaporator)
Suction
Accumlator
Compressor
Heat
exchanger
(condenser)
Liquid pipe
side
Valve
Strainer
Electron
expansion
valve
Strainer
COOLING
HEATING
&RQQHFWLRQSLSHVSHFL¿FDWLRQ
/LTXLGSLSHPP
*DVSLSHPP
14
7HFKQLFDO,QIRUPDWLRQ
Service Manual
5. Electrical Part
5.1 Wiring Diagram
Ɣ,QVWUXFWLRQ
Symbol
Symbol Color
Symbol
Symbol Color
Symbol
Name
WH
:KLWH
GN
Green
CAP
-XPSHUFDS
YE
Yellow
BN
Brown
COMP
Compressor
RD
Red
BU
%OXH
Yellow/Green
BK
%ODFN
/
/
Violet
OG
Orange
/
/
YEGN
VT
*URXQGLQJZLUH
1RWH-XPSHUFDSLVXVHGWRGHWHUPLQHIDQVSHHGDQGWKHVZLQJDQJOHRIKRUL]RQWDOORYHUIRUWKLVPRGHO
Ɣ,QGRRU8QLW
TUBE
TEM.SENSOR
θ
θ
RT1
RT2
DISPLAY
L1
AP1
CN1 CN2
L1
N
ROOM
DISP-1 DISP-2
TUBE
COM-OUT
POWER
BN
YEGN
BU
XT1
W1BU
N(1)
W2BK
2
W3BN
CAP
AP2
AC-L
L-OUT
K4
JUMP
3
W4YEGN
L
N
BU
BK
BN
YEGN
OUTDOOR UNIT
ROOM
TEM.SENSOR
EVAPORATOR
PE
PGF PG
SWING-UD
HEALTH-LHEALTH-N
M
M
RD
BU
COOL PLASMA
GENERATOR
YEGN
FAN MOTOR
SWING MOTOR(U.D)
PE
7HFKQLFDO,QIRUPDWLRQ
15
Service Manual
B2VO-09 / C2VO-09
TUBE OUTROOM EXHAUST
TEM.SENSOR TEM.SENSOR TEM.SENSOR
RT1 RT2 RT3
4YV
θ θ θ
YEGN
PE
I
N
D
O
O
R
U
N
I
T
XT
BU
BK
L1 BU
N(1)
BN
YEGN
BK
2
3
L1 BN
PE
PE
CN2
CN1
CN3
AP1
N
COM-OUT N1 BU
AC-N
AC-L1 BN
AC-L
AC-L
PE
YEGN
EKV
L3
BU BN
LX1-1 LX1-2
CN1
AC-L2
BN
AC-L3
AP2
AC-N1
AC-N2 BU
OFAN
U V W
L4
BU YE RD
MID.ISOLATION SHEET ELECTRIC BOX
PE
4V
L
RD
SAT
M
L2 L2
L2
OVC-COMP
NOTE:
FAN
Motor ground only
BU YE RD
YEGN applies to the
U V
iron shell motor.
YEGN
W
COMP.
PE
E
COMP
B2VO-12 / C2VO-12
L
YEGN
PE
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iron shell motor.
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16
TUBE OUTROOM EXHAUST
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Service Manual
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17
Service Manual
5.2 PCB Printed Diagram
Indoor Unit
Ɣ Top view
3
4
5
6
7
8
9
10
11
2
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
1
15
18
17
16
14
15
16
17
18
3RZHURIVZLWFK
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Port of indoor fan
Solid-state relay
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sensor
Port of indoor pipe temp sensor
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Service Manual
Outdoor Unit
Ɣ Top view
3
4
2
5
6
1
1
2
3
4
5
6
7
8
9
10
LQGXFWDQFHSLQ
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7
8
10
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7HFKQLFDO,QIRUPDWLRQ
19
Service Manual
6. Function and Control
6.1 Remote Controller Introduction
Buttons on Remote Controller
1
ON/OFF Button
2
MODE Button
3
+/- Button
4
FAN Button
5
Button
6
CLOCK Button
7
TIMER ON/TIMER-OFF Button
8
X-FAN Button
2
1
3
4
5
6
8
7
9
TEMP Button
10
9
10
TURBO Button
12
11
11
LIGHT Button
12
SLEEP Button
Introductionfor Icons on Display Screen
Operation mode
mode
Set fan speed
Send signal
Auto mode
Cool mode
X-fan mode
Dry mode
Fan mode
Heat mode
Set temperature
Turbo mode
Set time
Clock
TIMER ON/TIMER OFF
Sleep mode
Child lock
Temp. display
display type
type
:Set temp.
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:Outdoor ambient temp.
Light
Up&down swing
Introduction for Buttons on Remote Controller
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Child lock function:
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Operation Guide
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Replacement of Batteries in Remote Controller
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23
Service Manual
6.2 Brief Description of Modes and Functions
1. Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (T amb.)
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1)COOL mode
The condition and process of cooling
If Tamb. ≥Tpreset COOL mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set speed.
If Tamb. ≤Tpreset-2 , the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set speed.
If Tpreset-2
≤Tamb ≤Tpreset , the unit will keep running in the previous mode.
In this mode, the reversal valve will not be powered on and the temperature setting range is 16
~30 .
Start cooling
Tamb.
Tpreset
Original operating status
Tpreset –2 ˚C
≥ 6 min.
≥ 3 min.
≥ 6 min.
Stop cooling
Compressor
Outdoor fan
Setting fan speed
Indoor fan
Run
Protection function
Overcurrent protection
Stop
If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the
outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor yellow light will blink 5 times.
Antifreezing protection
When the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the
indoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and the
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.
During antifreeze protection
min
Compressor
Outdoor fan
Preset speed
Indoor fan
Run
Stop
(2) Dehumidifying Mode
Working conditions and process of dehumidifying
If T amb. T preset, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will
operate and the indoor fan will run at low speed.
If T preset -2
T amb. T preset, the compressor remains at its original operation state.
If T amb.< T preset -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at low speed.
Protection
Protection is the same as that under the cooling mode.
24
7HFKQLFDO,QIRUPDWLRQ
Service Manual
(3) HEAT Mode
ķ Working conditions and process of heating
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60-second blow at low speed
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ĸ Condition and process of defrost
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compensatory=3°C)
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Ĺ Protection
ƹ Cold air prevention
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speed.
Note: T indoor amb. indicated in
ķ and
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(4) Fan Mode
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(5) AUTO Mode
ķ Working conditions and process of AUTO mode
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LQ)DQPRGHVHWWHPSHUDWXUHEH°C.
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mode.
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25
Service Manual
ĸ Protection
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(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes
ķ Overload protection
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1) Cooling overload
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2) Heating overload
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ĸ Exhaust temperature protection of compressor
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Ĺ Communication fault
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ĺ Module protection
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Ļ Overload protection
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ļ DC bus voltage protection
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Ľ Faults of temperature sensors
3. Other Controls
(1) ON/OFF
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(2) Mode Selection
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(3) Temperature Setting Option Button
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Range: 16~30°CWKHEXWWRQLVXVHOHVVXQGHUWKH$872PRGH
(4) Time Switch
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(5) SLEEP State Control
1. In cooling mode:
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Service Manual
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Initial Temp.
0(start)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
30
2
18
19
20
21
22
23
24
25
26
27
28
29
29
30
30
3
19
20
21
22
23
24
25
26
26
27
28
29
29
30
30
5XQQLQJWLPH7
4
5
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
26
26
27
27
28
28
29
29
29
29
30
30
30
30
6
19
20
21
22
23
24
25
26
26
27
28
29
29
30
30
7
18
19
20
21
22
23
24
25
25
26
27
28
28
29
29
8
18
19
20
21
22
23
24
25
25
26
27
28
28
29
29
,QKHDWLQJPRGH
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Initial Temp.
0(start)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
16
16
17
18
19
20
21
22
23
24
25
26
27
28
29
2
16
16
17
18
19
19
20
21
22
23
24
25
26
27
28
3
16
16
17
18
19
19
20
21
22
23
24
25
25
26
27
5XQQLQJWLPH7
4
5
16
16
16
16
17
17
18
18
19
19
19
19
20
20
21
21
22
22
23
23
24
24
25
25
25
25
26
26
27
27
6
16
16
17
18
19
19
20
21
22
23
24
25
25
26
27
7
16
16
17
18
19
19
20
21
22
23
24
25
25
26
27
8
16
16
17
18
19
19
20
21
22
23
24
25
25
26
27
(6) Indoor Fan Control
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Service Manual
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(7) Buzzer Control
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(8) Auto button
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(9) Up-and-Down Swinging Control
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heating angle
O(0 )
R
cooling angle
R
O(0 )
L
A
B
C
L1
A1
B1
C1
D1
D
(10) Display
ķ Operation pattern and mode pattern display
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(11) Protection function and failure display
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after defrosted)
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(12) Drying Function
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PLQXWHVFRROLQJLQGLFDWRULVRQIRUVDQGWKHQRIIIRUVLQGU\LQJDQGRWKHUORDGLVVWRSSHGWKHQVWRSWKHHQWLUHPDFKLQH
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(13) Memory function when interrupting the power supply
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VWDUWZKHQUHFRYHULQJWKHSRZHUDFFRUGLQJWRWKHPHPRU\FRQWHQWDXWRPDWLFDOO\,IWKHODVWUHPRWHFRQWUROFRPPDQGKDVQRWVHW
WKHWLPHGIXQFWLRQWKHV\VWHPZLOOUHPHPEHUWKHODVWUHPRWHFRQWUROFRPPDQGDQGRSHUDWHDFFRUGLQJLW,IWKHODVWUHPRWHFRQWURO
FRPPDQGKDVVHWWLPHGIXQFWLRQDQGWKHSRZHUVXSSO\LVLQWHUUXSWHGEHIRUHWKHWLPHGWLPHWKHV\VWHPZLOOUHPHPEHUWKHWLPHG
IXQFWLRQRIWKHODVWUHPRWHFRQWUROFRPPDQGWKHWLPHGWLPHZLOOUHFRXQWHGIRUPSRZHURQ,IWKHODVWUHPRWHFRQWUROFRPPDQGKDV
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V\VWHPZLOOUHPHPEHUWKHRSHUDWLRQVWDWXVEHIRUHWKHSRZHUVXSSO\ZDVLQWHUUXSWHGDQGGRQRWFDUU\RXWWLPHGDFWLRQ7KHWLPHG
FORFNZLOOQRWUHPHPEHUHG
(14)Electric heating band control of outdoor unit
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29
Service Manual
Part Ċ : Installation and Maintenance
7. Notes for Installation and Maintenance
Safety Precautions:
Important!
Please read the safety precautions carefully before
installation and maintenance.
The following contents are very important for installation
and maintenance.
Please follow the instructions below.
Ɣ7KHLQVWDOODWLRQRUPDLQWHQDQFHPXVWDFFRUGZLWKWKH
instructions.
Ɣ&RPSO\ZLWKDOOQDWLRQDOHOHFWULFDOFRGHVDQGORFDO
electrical codes.
Ɣ3D\DWWHQWLRQWRWKHZDUQLQJVDQGFDXWLRQVLQWKLV
manual.
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GLVWULEXWRURUTXDOL¿HGSHUVRQ
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technician according to local regulations and the
instructions given in this manual.
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incorrect operation to prevent electric shock, casualty and
other accidents.
Warnings
Electrical Safety Precautions:
1. Cut off the power supply of air conditioner before
checking and maintenance.
2. The air condition must apply specialized circuit and
prohibit share the same circuit with other appliances.
3. The air conditioner should be installed in suitable
location and ensure the power plug is touchable.
4. Make sure each wiring terminal is connected firmly
during installation and maintenance.
5. Have the unit adequately grounded. The grounding
wire can’t be used for other purposes.
6. Must apply protective accessories such as protective
boards, cable-cross loop and wire clip.
7. The live wire, neutral wire and grounding wire of
power supply must be corresponding to the live wire,
neutral wire and grounding wire of the air conditioner.
8. The power cord and power connection wires can’t be
pressed by hard objects.
9. If power cord or connection wire is broken, it must be
UHSODFHGE\DTXDOL¿HGSHUVRQ
30
10. If the power cord or connection wire is not long enough,
please get the specialized power cord or connection wire
from the manufacture or distributor. Prohibit prolong the wire
by yourself.
11. For the air conditioner without plug, an air switch must
be installed in the circuit. The air switch should be all-pole
parting and the contact parting distance should be more than
3mm.
12. Make sure all wires and pipes are connected properly and
the valves are opened before energizing.
13. Check if there is electric leakage on the unit body. If yes,
please eliminate the electric leakage.
5HSODFHWKHIXVHZLWKDQHZRQHRIWKHVDPHVSHFL¿FDWLRQ
if it is burnt down; don’t replace it with a cooper wire or
conducting wire.
15. If the unit is to be installed in a humid place, the circuit
breaker must be installed.
Installation Safety Precautions:
1. Select the installation location according to the requirement of this manual.(See the requirements in installation
part)
2. Handle unit transportation with care; the unit should not
be carried by only one person if it is more than 20kg.
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VXSSRUWLV¿UP
4. Ware safety belt if the height of working is above 2m.
5. Use equipped components or appointed components during installation.
0DNHVXUHQRIRUHLJQREMHFWVDUHOHIWLQWKHXQLWDIWHU¿Qishing installation.
Refrigerant Safety Precautions:
$YRLGFRQWDFWEHWZHHQUHIULJHUDQWDQG¿UHDVLWJHQHUDWHV
poisonous gas; Prohibit prolong the connection pipe by
welding.
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any other refrigerant. Never have air remain in the refrigerant
line as it may lead to rupture or other hazards.
3. Make sure no refrigerant gas is leaking out when
installation is completed.
4. If there is refrigerant leakage, please take sufficient
measure to minimize the density of refrigerant.
5. Never touch the refrigerant piping or compressor without
wearing glove to avoid scald or frostbite.
,PSURSHULQVWDOODWLRQPD\OHDGWR¿UHKD]DUGH[SORVLRQ
electric shock or injury.
Installation and Maintenance
Service Manual
Main Tools for Installation and Maintenance
1. Level meter, measuring tape
2. Screw driver
3. Impact drill, drill head, electric drill
4. Electroprobe
5. Universal meter
6. Torque wrench, open-end wrench, inner
hexagon spanner
7. Electronic leakage detector
8. Vacuum pump
9. Pressure meter
10. Pipe pliers, pipe cutter
11. Pipe expander, pipe bender
12. Soldering appliance, refrigerant container
Installation and Maintenance
31
Service Manual
8. Installation
8.1 Installation Dimension Diagram
Installation dimension diagram
Space to the ceiling
15cm
Above
Space to the wall
15cm Above
15cm Above
Space to the wall
250
cm
Above
300cm
Above
Air outlet side
Space to the floor
● The dimensions of the space necessary for correct
installation of the appliance including the minimum
Space to the obstruction
50cm Above
permissible distances to adjacent structures
Air inlet side
ve
cm
o
Ab
30
30cm Above
Space to the wall
Space to the wall
20
0c
m
Ab
ov
50cm Above
e
Air outlet side
32
Installation and Maintenance
Service Manual
Installation procedures
Start installation
Preparation before installation
Read the requirements
for electric connection
select installation
location
Select indoor unit
installation location
Prepare tools
Select outdoor unit
installation location
Install the support of outdoor unit
(select it according to the actual situation)
Install wall-mounting
frame, drill wall holes
Connect pipes of indoor
unit and drainage pipe
Fix outdoor unit
Connect wires of indoor unit
Install drainage joint of outdoor unit
(only for cooling and heating unit)
Bind up pipes and
hang the indoor unit
Make the bound pipes pass
through the wall hole and then
connect outdoor unit
Connect pipes of outdoor unit
Connect wires of outdoor unit
Neaten the pipes
Vacuum pumping and leakage detection
Check after installation and test operation
Finish installation
Note: this flow is only for reference; please find the more detailed installation steps in this section.
Installation and Maintenance
33
Service Manual
8.2 Installation Parts-checking
No.
1
2
Name
,QGRRUXQLW
2XWGRRUXQLW
No.
8
9
3
Connection pipe
10
4
Drainage pipe
:DOOPRXQWLQJ
frame
Connecting
cable(power cord)
Wall pipe
11
5
6
7
12
13
Name
6HDOLQJJXP
Wrapping tape
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XQLW
)L[LQJVFUHZ
'UDLQDJHSOXJFRROLQJ
DQGKHDWLQJXQLW
2ZQHU¶VPDQXDO
remote controller
Note:
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8.3 Selection of Installation Location
1. Basic Requirement:
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PDOIXQFWLRQ,ILWLVXQDYRLGDEOHSOHDVHFRQVXOWWKHORFDOGHDOHU
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7KHSODFHZLWKVXOIXUHWHGJDV
2WKHUSODFHVZLWKVSHFLDOFLUFXPVWDQFHV
2. Indoor Unit:
7KHUHVKRXOGEHQRREVWUXFWLRQQHDUDLULQOHWDQGDLURXWOHW
6HOHFWDORFDWLRQZKHUHWKHFRQGHQVDWLRQZDWHUFDQEH
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7KHORFDWLRQVKRXOGEHDEOHWRZLWKVWDQGWKHZHLJKWRI
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appliance.
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3. Outdoor unit:
6HOHFWDORFDWLRQZKHUHWKHQRLVHDQGRXWÀRZDLUHPLWWHGE\
WKHRXWGRRUXQLWZLOOQRWDIIHFWQHLJKERUKRRG
7KHORFDWLRQVKRXOGEHZHOOYHQWLODWHGDQGGU\LQZKLFKWKH
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wind.
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installation dimension diagram.
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34
8.4 Electric Connection Requirement
1. Safety precaution
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RI DLU FRQGLWLRQHU 8QVWDEOH SRZHU VXSSO\ RU LQFRUUHFW ZLULQJ
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conditioner.
Air-conditioner
09K
12K
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10A
16A
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NHHSWKHLQWHUFRQQHFWLRQFDEOHDZD\IURPWKHFRSSHUWXEH
2. Grounding requirement:
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EH SURSHUO\ JURXQGLQJ ZLWK VSHFLDOL]HG JURXQGLQJ GHYLFH
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accessible
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,QFOXGLQJDQDLUVZLWFKZLWKVXLWDEOHFDSDFLW\SOHDVHQRWH
WKH IROORZLQJ WDEOH$LU VZLWFK VKRXOG EH LQFOXGHG PDJQHW
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8.5 Installation of Indoor Unit
1. Choosing Installation Iocation
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2. Install Wall-mounting Frame
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KRUL]RQWDOSRVLWLRQZLWKWKHOHYHOPHWHUDQGWKHQSRLQWRXWWKH
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Installation and Maintenance
Service Manual
LQWKHKROHV
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3. Install Wall-mounting Frame
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Wall
Wall
Level meter
Mark in the middle of it
Space
to the
wall
above
150mm
Space
to the
wall
above
150mm
Left
Φ55mm
Rear piping hole
5. Connect the Pipe of Indoor Unit
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Open-end
wrench
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Pipe joint
Union nut
Right
Φ55mm
Rear piping hole
)LJ
Pipe
)LJ
Indoor pipe
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KROHRQWKHZDOOVOLJKWO\GRZQZDUGWRWKHRXWGRRUVLGHZLWKWKH
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Indoor
Pipe
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)LJ
Insulating pipe
)LJ
Outdoor
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+H[QXWGLDPHWHUPP
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15~20
30~40
45~55
60~65
70~75
6. Install Drain Hose
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4. Outlet pipe
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Drain hose
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pipe
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Left
Right
Rear right
Right
Cut off
the hole
Installation and Maintenance
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35
Service Manual
7. Connect Wire of Indoor Unit
8. Bind up Pipe
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Panel
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Wiring cover
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Indoor and
outdoor power cord
Indoor unit
Gas
pipe
Cable-cross
hole
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Liquid
pipe
Band
Drain hose
Power connection
wire
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Connection pipe
Drain hose
Band
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Cooling and heating unit
blue
black brown yellowgreen
Connect to outdoor unit
Wiring board
N(1) 2
Note:
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winding.
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9. Hang the Indoor Unit
3
Wire clip
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please refer to the actual one
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connected by a professional.
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36
Indoor power cord
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Sealing gum
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Lower hook of
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Installation and Maintenance
Service Manual
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8.6 Installation of Outdoor Unit
1. Fix the support of outdoor unit(select it according to the
actual installation situation)
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45~55
60~65
70~75
5. Connect Outdoor Electric Wire
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Grounding
wire
Wiring board
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Drain vent
Chassis
Outdoor drain joint
Drain hose
Handle
At least 3cm above the floor
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2. Install Drain Joint(Only for cooling and heating unit)
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6. Neaten the Pipes
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can't raise
upwards
Wall
Liquid pipe
Liquid
valve
Pipe joint
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gas pipe
gas valve
U-shaped curve
Union nut
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Drain hose
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37
Service Manual
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8.8 Check after Installation and Test
Operation
1. Check after Installation
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installation.
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can't be placed
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8.7 Vacuum Pumping and Leak
Detection
1. Use Vacuum Pump
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Refrigerant charging
vent
Valve cap
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spanner
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38
Installation and Maintenance
Service Manual
9. Maintenance
9.1 Error Code List
Display Method of Indoor Unit
NO.
Malfunction
Name
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
A/C status
Possible Causes
0.5s
Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
1
2
3
4
High
pressure
protection of
system
Antifreezing
protection
In defect of
refrigerant
High
discharge
temperature
protection of
compressor
5
Overcurrent
protection
6
Communication
Malfunction
7
High
temperature
resistant
protection
8
EEPROM
malfunction
9
Limit/
decrease
frequency
due to high
temperature
of module
10
Malfunction
protection of
jumper cap
E1
E2
During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops.
OFF 3s
and blink
once
OFF 3S
and blink
twice
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
OFF 1S
and blink
3 times
OFF 1S
and
blink
9 times
F0
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including
and bad radiating environment );
Ambient temperature is too high.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
1.In defect of refrigerant;
The Dual-8 Code Display will 2.Indoor evaporator temperature
show F0 and the complete unit sensor works abnormally;
stops.
3.The unit has been plugged up
somewhere.
E4
OFF 3S
and blink
4 times
OFF 1S
and blink
7 times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Please refer to the malfunction
analysis (discharge protection,
overload).
E5
OFF 3S
and blink
5
times
OFF 1S
and blink
5 times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
E6
OFF 3S
and blink
6
times
Always
ON
During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation, the
complete unit stops.
Refer to the corresponding
malfunction analysis.
E8
OFF 3S
and blink
8
times
OFF 1S
and blink
6 times
During cooling operation:
compressor will stop while
indoor fan will operate.
During heating operation, the
complete unit stops.
Refer to the malfunction analysis
(overload, high temperature
resistant).
OFF 3S OFF 1S
and blink and blink
15 times 11 times
EE
OFF 3S OFF 3S
and blink and blink
6 times 6 times
EU
C5
Installation and Maintenance
OFF 3S
and blink
15 times
During cooling and drying
operation, compressor will stop
Replace outdoor control panel AP1
while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally,
while
operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
not dispose the related
command
Discharging after the complete unit
is de-energized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
the radiator is inserted tightly.
If its no use, please replace control
panel AP1.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
39
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
11
12
13
14
15
Gathering
refrigerant
Indoor
ambient
temperature
sensor is
open/short
circuited
Indoor
evaporator
temperature
sensor is
open/short
circuited
Outdoor
ambient
temperature
sensor is
open/short
circuited
Outdoor
condenser
temperature
sensor is
open/short
circuited
16
Outdoor
discharge
temperature
sensor is
open/short
circuited
17
Limit/
decrease
frequency
due to
overload
18
Decrease
frequency
due to
overcurrent
40
Fo
F1
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
A/C status
Possible Causes
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
OFF 3S OFF 3S
and blink and blink
1 times 1 times
When the outdoor unit receive
signal of Gathering refrigerant
,the system will be forced to
Nominal cooling mode
run under cooling mode for
gathering refrigerant
OFF 1S
and blink
17 times
1. Loosening or bad contact of
indoor ambient temp. sensor and
During cooling and drying
mainboard terminal.
operation, indoor unit operates
2. Components in mainboard fell
while other loads will stop;
down leads short circuit.
during heating operation,
3. Indoor ambient temp. sensor
the complete unit will stop
damaged.(check with sensor
operation.
resistance value chart)
4. Mainboard damaged.
OFF 3S
and blink
once
F2
OFF 3S
and blink
twice
F3
OFF 3S
and blink
3 times
F4
OFF 3S
and blink
4 times
AC stops operation once
reaches the setting
temperature. Cooling, drying:
internal fan motor stops
operation while other loads
stop operation; heating: AC
stop operation
OFF 1S
and
blink
6 times
OFF 1S
and
blink
5 times
During cooling and drying
operating, compressor stops
while indoor fan operates;
During heating operation,
the complete unit will stop
operation
During cooling and drying
operation, compressor stops
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation.
1. Loosening or bad contact of
Indoor
evaporator temp. sensor and
mainboard terminal.
2. Components on the mainboard
fall
down leads short circuit.
3. Indoor evaporator temp. sensor
damaged.(check temp. sensor
value
chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
F5
OFF 3S
and blink
5 times
OFF 1S
and
blink
7 times
During cooling and drying
operation, compressor will sop
after operating for about 3
mins,
while indoor fan will operate;
During heating operation, the
complete unit will stop after
operating for about 3 mins.
1.Outdoor temperature sensor
hasnt been connected well or is
damaged. Please check it by
referring to the resistance table for
temperature sensor)
2.The head of temperature sensor
hasnt been inserted into the copper
tube
F6
OFF 3S
and blink
for 6
times
OFF 1S
and
blink
3 times
All loads operate normally,
while
operation frequency for
compressor is decreased
Refer to the malfunction analysis
(overload, high temperature
resistant)
F8
OFF 3S
and blink
8 times
OFF 1S
and
blink
once
All loads operate normally,
while
operation frequency for
compressor is decreased
The input supply voltage is too low;
System pressure is too high and
overload
Installation and Maintenance
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
19
due to
high air
F9
OFF 1S
and
blink
twice
OFF 3S
and blink
9 times
discharge
20
21
Limit/
decrease
frequency
due to
antifreezing
Voltage for
DC bus-bar
is too high
22
Voltage of
DC bus-bar
is too low
23
Compressor
Min
frequence in
test state
24
Compressor
rated
frequence in
test state
25
Compressor
maximum
frequence in
test state
FH
PH
Possible Causes
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
Decrease
frequency
A/C status
blinking, ON 0.5s and OFF
0.5s
OFF 1S
and
blink
4 times
OFF 3S OFF 3S
and blink and blink
2 times 2 times
OFF 3S
and blink
11 times
OFF 3S
and blink
21 times
PL
All loads operate normally,
while
operation frequency for
compressor is decreased
All loads operate normally,
while operation frequency for
compressor is decreased
Overload or temperature is too
high;
Malfunction of electric expansion
valve (EKV)
Poor air-return in indoor unit or fan
speed is too low
OFF 1S
and
blink
13 times
1. Measure the voltage of position
L and N on wiring board (XT), if the
During cooling and drying
voltage is higher than 265VAC, turn
operation, compressor will stop on the unit after the supply voltage
is increased to the normal range.
while indoor fan will operate;
2.If the AC input is normal,
During heating operation, the measure the voltage of electrolytic
complete unit will stop
capacitor C on control panel (AP1),
operation.
if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
OFF 1S
and
blink
12 times
1. Measure the voltage of position
L and N on wiring board (XT), if the
voltage is higher than 150VAC,
turn on the unit after the supply
During cooling and drying
voltage is increased to the normal
operation, compressor will stop
range.
while indoor fan will operate;
During heating operation, the 2.If the AC input is normal,
measure the voltage of electrolytic
complete unit will stop
capacitor C on control panel (AP1),
if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
P0
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during min. cooling or
min. heating test
P1
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during nominal cooling or
nominal heating test
P2
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during max. cooling or
max. heating test
Installation and Maintenance
41
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Compressor
26
27
28
intermediate
frequence in
test state
Overcurrent
protection of
phase
current for
compressor
Charging
malfunction
of capacitor
P3
P5
PU
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
30
31
32
of module
temperature
sensor circuit
Module high
temperature
protection
Decrease
frequency
due to high
temperature
resistant
during
heating
operation
Static
dedusting
P7
P8
H0
H2
protection
33
42
Overload
protection for
compressor
Possible Causes
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during middle cooling or
middle heating test
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
OFF 3S
and blink
15 times
OFF 3S
and blink
17 times
Malfunction
29
A/C status
OFF 3S
and blink
18 times
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
During cooling and drying
operation, compressor will stop
Refer to the part three—charging
while indoor fan will operate;
malfunction analysis of capacitor
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Replace outdoor control panel AP1
During heating operation, the
complete unit will stop
After the complete unit is deenergized for 20mins, check
whether the thermal grease on IPM
Module of outdoor control panel
OFF 3S
and blink
19 times
During cooling operation,
compressor will stop while
indoor fan will operate;
During heating operation, the
complete unit will stop
OFF 3S
and blink
10 times
All loads operate normally,
while
operation frequency for
compressor is decreased
Refer to the malfunction analysis
(overload, high temperature
resistant)
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
1. Wiring terminal OVC-COMP
is loosened. In normal state, the
resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis (
discharge protection, overload)
radiator is inserted tightly. If its no
use, please replace control panel
AP1.
OFF 3S
and blink
twice
H3
OFF 3S OFF 1S
and blink and blink
3 times 8 times
Installation and Maintenance
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
34
System is
abnormal
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
A/C status
Possible Causes
0.5s
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
During cooling and drying
operation, compressor will stop
OFF 3S OFF 1S
and blink and blink
4 times 6 times
H4
while indoor fan will operate;
During heating operation, the
complete unit will stop
Refer to the malfunction analysis
(overload, high temperature
resistant)
operation.
During cooling and drying
35
IPM
protection
H5
OFF 3S OFF 1S
and blink and blink
5 times 4 times
36
Module
temperature
is too high
H5
OFF 3S OFF 1S
and blink and blink
5 times 10 times
37
Internal motor
(fan motor) do
not operate
H6
38
Desynchronizing of
compressor
H7
OFF 3S
and blink
7 times
39
PFC
protection
HC
OFF 3S OFF 1S
and blink and blink
6 times 14 times
40
Outdoor DC
fan motor
malfunction
Refer to the malfunction
operation, compressor will stop
analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
1. Bad contact of DC motor
feedback terminal.
Internal fan motor, external fan 2. Bad contact of DC motor
motor, compressor and electric control end.
heater stop operation,guide
3. Fan motor is stalling.
louver stops at present
4. Motor malfunction.
location.
5. Malfunction of mainboard rev
detecting circuit.
During cooling and drying
Refer to the malfunction
operation, compressor will stop analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Refer to the malfunction analysis
During heating operation, the
complete unit will stop
operation.
OFF 3S
and blink
11 times
OFF 1S
and
blink
14 times
DC fan motor malfunction or
Outdoor DC fan motor
malfunction lead to compressor system blocked or the connector
stop operation,
loosed
L3
OFF 3S
and blink
23 times
41
power
protection
L9
OFF 3S
and blink
20 times
OFF 1S
and blink
9 times
compressor stop operation and
To protect the electronical
Outdoor fan motor will stop
components when detect high
30s latter , 3 minutes latter
fan motor and compressor will power
restart
42
Indoor unit
and outdoor
unit doesn't
match
LP
OFF 3S
and blink
19 times
OFF 1S
and blink
16 times
compressor and Outdoor fan
motor can’t work
43
Failure startup
LC
Installation and Maintenance
OFF 3S
and blink
11 times
Indoor unit and outdoor unit doesn't
match
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Refer to the malfunction analysis
During heating operation, the
complete unit will stop
operation.
43
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
During cooling and drying
phase current
detection
U1
circuit for
OFF 3S
operation, compressor will stop
and blink
while indoor fan will operate;
13 times
During heating operation, the
compressor
45
46
Malfunction of
voltage
dropping for
DC bus-bar
Malfunction
of complete
units current
detection
Possible Causes
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
Malfunction of
44
A/C status
blinking, ON 0.5s and OFF
0.5s
Replace outdoor control panel AP1
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Supply voltage is unstable
During heating operation, the
complete unit will stop
OFF 3S
and blink
20 times
U3
During cooling and drying
operation, the compressor will
stop while indoor fan will
operate;
During heating operating,
the complete unit will stop
OFF 3S
and blink
13 times
U5
Theres circuit malfunction on
outdoor units control panel AP1,
please replace the outdoor units
control panel AP1.
operation.
47
The four-way
valve is
If this malfunction occurs
OFF 3S
and blink
20 times
U7
abnormal
48
Zerocrossing
malfunction of
U9
during
heating operation, the complete broken;
unit will stop operation.
3.4V is damaged, please replace
4V.
During cooling operation,
compressor will stop while
indoor fan will operate; during
heating,the complete unit will
stop operation.
OFF 3S
and blink
18 times
outdoor unit
49
Frequency
limiting
(power)
50
Compressor
running
51
The
temperature
for turning
on the unit is
reached
OFF 1S
and blink
8 times
52
Frequency
limiting
(module
temperature)
OFF 1S
and blink
11 times
44
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened or
Replace outdoor control panel AP1
OFF 1S
and blink
13 times
OFF 1S
and blink
once
Installation and Maintenance
Service Manual
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display Method of Outdoor Unit
Indicator has 3 kinds of display
status and during blinking, ON
Heating Yellow
Red
Display Operation Cool
Indicator Indicator Indicator Indicator Indicator
communication
54
Defrosting
Installation and Maintenance
Possible Causes
Green
Indicator
OFF 0.5S
and blink
once
Normal
53
A/C status
0.5s and OFF 0.5s
OFF 3S
and blink
once
(during
OFF 1S
blinking,
and blink
ON 10s
twice
and OFF
0.5s)
Defrosting will occur in
heating
mode. Compressor will
operate
while indoor fan will stop
operation.
Its the normal state
45
Service Manual
9.2 Troubleshooting for Main Malfunction
1. Malfunction of Temperature Sensor F1, F2
Troubleshooting for
F1,F2 malfunction
Is
the wiring terminal between the
temperature sensor and the controller
loosened or poorly contacted?
yes
Insert the temperature
sensor tightly
no
no
Is there short circuit due to trip-over of
the parts?
Is malfunction
eliminated
yes
Make the parts upright
no
no
Is the
temperature sensor normal according
to the Resistance
Table?
Is malfunction
eliminated
yes
no
Replace it with a
temperature sensor
with the same model
yes
no
Is malfunction
removed
yes
Replace the mainboard
with the same model.
yes
End
46
Installation and Maintenance
Service Manual
2. Malfunction of Blocked Protection of IDU Fan Motor H6
Troubleshooting for
H6 malfunction
Stir the blade
with a tool to see whether
the blade rotates
smoothly
yes
no
Tighten the screw; reassemble the blade, motor
and shaft bearing rubber base sub-assy to make
sure there is no foreign object between them
Is malfunction
eliminated
no
Is the
control terminal of PG motor
connected tightly ?
yes
no
Insert the control
terminal of PG
motor tightly
yes
Is malfunction
eliminated
no
Stir the blade by
hand to see whether
the blade rotate s
smoothly
yes
no
Reinstall the blade and
motor correctly
yes
no
Turn on the
unit again ; measure whether the output
voltage on control terminal for PG motor
is more than 50V within 1 min after the
louvers are opened
yes
Measure the voltage of this foot to neutral
wire on the mainboard
Is malfunction
eliminated
yes
yes
yes
Is the motor
started up
no
no
Replace PG motor
no
Is malfunction
eliminated
yes
Replace the mainboard
with the same model.
End
Installation and Maintenance
47
Service Manual
3. Malfunction of Protection of Jumper Cap C5
Troubleshooting for C5
malfunction
Is there jumper cap on the
mainboard?
no
Appearance of
the jumper cap
Assemble the jumper
cap with the same
model
yes
Is malfunction
eliminated
no
Is
the jumper cap inserted
correctly and
tightly ?
no
Insert the
jumper cap
tightly
yes
no
Is malfunction
eliminated
yes
Replace the jumper cap
with the same model
yes
Is malfunction
eliminated
yes
no
Replace the mainboard
with the same model.
End
48
Installation and Maintenance
Service Manual
4. Malfunction of Overcurrent Protection E5
Troubleshooting
for E5 malfunction
Is the supply voltage unstable
with big fluctuation?
yes
no
Is the supply voltage too low
with overload?
Normal fluctuation is within 10 % of the rated
voltage on the nameplate
Malfunction is
eliminated
yes
Malfunction is
eliminated
yes
Malfunction is
eliminated
yes
no
yes
Adjust the supply voltage to maintain it within
normal range
no
no
Is the indoor / outdoor
heat exchanger too dirty,or are the air inlet
and outlet blocked?
yes
no
no
The fan is abnormal? Fan
speed is too low or fan doesn’t rotate
yes
no
Measure the
current of live wireon the main
board with a clamp ampere meter. Is the
current higher than the value of the
overcurrent protection?
Clean the indoor and outdoor heat exchangers
and remove the blockage of air inlet and outlet
Check the motor and reinstall the motor to have
the fan run normally
Malfunction is
eliminated
yes
Malfunction is
eliminated
yes
no
no
Replace the mainboard with the same model
yes
no
Is there blockage inside
the system? (Filth blockage, ice plug,
greasy blockage, the Y-valve hasn’t been opened
completely)
yes
Flush the heat exchangers with high pressure
nitrogen
Malfunction is
eliminated
yes
no
no
Is the compressor running
abnormally? Is there abnormal sound or oil
leakage; is the temperature of the shell
too high, etc.?
yes
Replace the mainboard with the same model
Malfunction is
eliminated
yes
no
no
Replace the mainboard with
the same model
End
Installation and Maintenance
49
Service Manual
5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8
Troubleshooting
for U8 malfunction
Re-energize1
minute after
de-erergization
U8 is still
displayed
No
The unit returns to normal.
Conclusion:U8 is displayed due
to instant energization afte deenergization while the capacitor
discharges slowly.
Yes
The zero-cross detection
circuit of the mainboard is
defined abnormal.Replace
the mainboard with the same
model
End
50
Installation and Maintenance
Service Manual
6.Capacity charging malfunction (outdoor unit malfunction) (AP1 below means control board of outdoor unit)
Main detection points:
ƽ'HWHFWLIWKHYROWDJHRI/DQG1WHUPLQDORI;7ZLULQJERDUGLVEHWZHHQ9$&9$&E\DOWHUQDWLQJYROWDJHPHWHU
ƽ,VUHDFWRU/ZHOOFRQQHFWHG",VFRQQHFWLRQZLUHORRVHQHGRUSXOOHGRXW",VUHDFWRU/GDPDJHG"
Turn on the unit and
wait 1 minute
Use AC voltmeter to measure
the voltage on the two ends
of electrolytic capacitor
(see fig 30)
Voltage higher
than 200V?
Y
Malfunction of
the outdoor
mainboard AP1
Replace outdoor
mainboard
N
Measure the voltage
input with AC voltmeter
(see fig 30)
Voltage within
180VAC~260VAC?
N
Power supply is
abnormal; repair
the power supply
to restore the range
between 180VAC
~260VAC
Power on and
restart the unit
Is the Vmalfunction
eliminated?
Y
Y
Shut down the power and wait 20
minutes; or use DC voltmeter to
measure the voltage on the two
ends of electrolytic capacitor
until the voltage is lower than 20V
N
Check the connection
of reactor and connection
wire
If the wiring of
reactor L is normal?
N
Connect the
connection
wire of reactor
L correctly
Power on and
restart the unit
Is the Vmalfunction
eliminated?
Y
Y
Replace outdoor
mainboard AP1
N
End
Installation and Maintenance
51
Service Manual
7.IPM protection(H5), desynchronizing malfunction(H7), overcurrent of compressor phase current (P5) (AP1 below means
control board of outdoor unit)
Main detection points:
ƽ,VYROWDJHLQSXWZLWKLQWKHQRUPDOUDQJH
ƽ,IWKHFRQWUROERDUG$3LVZHOOFRQQHFWHGZLWKFRPSUHVVRU&203",IWKH\DUHORRVHQHG",IWKHFRQQHFWLRQVHTXHQFHLVFRUUHFW"
ƽ+HDWH[FKDQJHRIXQLWLVQRWJRRGKHDWH[FKDQJHULVGLUW\DQGXQLWUDGLDWLQJHQYLURQPHQWLVEDG
ƽ,IWKHV\VWHPSUHVVXUHLVWRRKLJK"
ƽ,IWKHUHIULJHUDQWFKDUJLQJDPRXQWLVDSSURSULDWH"
ƽ,IFRLOUHVLVWDQFHRIFRPSUHVVRULVQRUPDO",VFRPSUHVVRUFRLOLQVXODWLQJWRFRSSHUSLSHZHOO"
ƽ,IWKHZRUNORDGRIXQLWLVKHDY\",IUDGLDWLQJRIXQLWLVJRRG"
0DOIXQFWLRQGLDJQRVLVSURFHVV
H5, H7 or P5 is
displayed after
turning on the unit
Measure if the voltage
input is within 180~265V
with AC voltmeter
(see fig 30)
N
Repair power supply to make
the power voltage normal
Y
The compressor
is well connected
with mainboard
AP1?
N
Adjust it properly
according to wiring
diagram 5.1
Y
Restart the unit
The unit starts
operation again
Y
Restart the unit
The unit starts
operation again
Y
Restart the unit
The unit starts
operation again
Y
N
Y
Clean the heat exchanger
to improve its performance
N
Check if system pressure
is too high?
The unit starts
operation again
N
Y
Heat exchanger is
blocked with dirt?
Restart the unit
N
Y
Adjust refrigerant
charging amount
N
Replace outdoor
mainboard AP1
Does the unit
work normally
Y
N
Replace compressor
End
52
Installation and Maintenance
Service Manual
8.High temperature and overload protection (E8)(AP1 below means control board of outdoor unit)
Main detection points:
ƽ,IWKHRXWGRRUDPELHQWWHPSHUDWXUHLVLQQRUPDOUDQJH
ƽ,IWKHLQGRRUDQGRXWGRRUIDQDUHUXQQLQJQRUPDOO\
ƽ,IWKHUDGLDWLQJHQYLURQPHQWRILQGRRUDQGRXWGRRUXQLWLVJRRG
E8 is displayed
If the outdoor
ambient temperature is higher
than 53℃?
Y
N
If the radiating of indoor
and outdoor unit is good?
N
If the indoor and outdoor
fan are running normally?
Normal protection, please
use it after improving the
outdoor ambient temperature
Unit restarts
normally
Y
Unit restarts
normally
Y
N
Y
Improve the radiating environment
of unit (clean the heat exchanger
and remove surrounding obstacles)
N
Connect normally?
Y
Adjust the
connection
Y
Replace Fan
capacitor
Y
Replace Motor
Y
Y
Fan capacitor is broken?
Replace outdoor
mainboard
N
Motor is broken?
N
Replace mainboard
End
Installation and Maintenance
53
Service Manual
9.Start-up failure (LC) (AP1 below means control board of outdoor unit)
Main detection points:
ƽ,IWKHFRPSUHVVRUZLULQJLVFRUUHFW"
ƽ,IWKHVWRSWLPHRIFRPSUHVVRULVVXI¿FLHQW"
ƽ,IWKHFRPSUHVVRULVGDPDJHG"
ƽ,IWKHUHIULJHUDQWFKDUJLQJDPRXQWLVWRRPXFK"
Turn on the unit
If the stop time of compressor
is more than 3min?
If the compressor wire
COMP(UVW) is well connected and
connection sequence is correct?
The stop time is not sufficient and
the high and low pressure of system
is not balanced , please start the unit
after 3min
Check the connection situation
of outdoor mainboard AP1 and
compressor COMP, and the
connect it according to wiring
diagram
Does the unit
start up normally?
If the refrigerant charging
amount is too much?
Charge the refrigerant
according to service
manual
Does the unit
start up normally?
Replace outdoor
mainboard AP1
Is the malfunction
eliminated?
Replace the
compressor
End
54
Installation and Maintenance
Service Manual
10.Overload and high discharge temperature malfunction
Main detection points:
ƽ,IWKHHOHFWURQLFH[SDQVLRQYDOYHLVFRQQHFWHGZHOO",VWKHHOHFWURQLFH[SDQVLRQYDOYHGDPDJHG"
ƽ,IWKHUHIULJHUDQWLVOHDNHG"
ƽ7KHFRPSUHVVRURYHUORDGSURWHFWLRQWHUPLQDOLVQRWFRQQHFWHGZHOOZLWKWKHPDLQERDUG"
ƽ,IWKHRYHUORDGSURWHFWRULVGDPDJHG"
ƽ+HDWH[FKDQJHRIXQLWLVQRWJRRG"KHDWH[FKDQJHULVGLUW\DQGXQLWUDGLDWLQJHQYLURQPHQWLVEDG
ƽ7RRPXFKORDGRIWKHV\VWHPFDXVHVKLJKWHPSHUDWXUHRIFRPSUHVVRUDIWHUZRUNLQJIRUDORQJWLPH"
ƽ0DOIXQFWLRQRIGLVFKDUJHWHPSHUDWXUHVHQVRU"
Installation and Maintenance
55
Service Manual
H3 or E4 is displayed
30min after power off the unit
If the overload protector SAT
is well connected?
N
Y
Under ambient temperature,
test the resistance of overload protector with ohmmeter;
resistance value should be＜1000ohm
Y
N
N
If the wiring terminal FA of electronic
expansion valve is well connected?
Connect wire
according to wiring
diagram
Y
Replace EKV coil of electronic expansion valve
Is the malfunction
eliminated?
Y
Is the malfunction
eliminated?
Y
Is the malfunction
eliminated?
Y
Is the malfunction
eliminated?
Y
Is the malfunction
eliminated?
Y
N
Replace overload
protector SAT
Check the situation of refrigerant; if there is leakage,
please charge refrigerant according to the service
manual
N
Compressor overload protection terminal is not
connected well with the mainboard; reconnect
them correctly
N
Heat exchange of unit is not good (heat exchanger
is dirty and unit radiating environment is bad);
improve the radiating environment and clean the
heat exchanger
N
Too much load of the system causes high temperature
of compressor after working for a long time;
decrease the load for operation
N
Replace outdoor
mainboard AP1
End
56
Installation and Maintenance
Service Manual
11.PFC (correction for power factor) malfunction (outdoor unit malfunction)
Main detection points:
ƽ&KHFNLISRZHUSOXJLVFRQQHFWHGZHOOZLWKWKHVRFNHW
ƽ&KHFNLIWKHUHDFWRURIRXWGRRUXQLWLVGDPDJHG"
0DOIXQFWLRQGLDJQRVLVSURFHVV
start
If power plug is connected
well with the socket
Y
Is the malfunction
eliminated?
Connect the plug correctly
N
Check the connection wire
between reactor mainboard
and situation of connection
N
If there is short circuit or the
connection wire is loose?
Y
Reconnect the wire or
replace the connection
wire according to the
wiring diagram.
Power on and
restart the unit
Is the malfunction
eliminated?
N
N
Check the surface of reactor coil
If it is damaged?
Y
Replace the reactor
Power on and
restart the unit
Is the malfunction
eliminated?
N
Replace outdoor
mainboard AP1
N
End
Installation and Maintenance
57
Service Manual
12.Communication malfunction (E6)
Main detection points:
ƽ&KHFNLIWKHFRQQHFWLRQZLUHDQGWKHEXLOWLQZLULQJRILQGRRUDQGRXWGRRUXQLWDUHFRQQHFWHGZHOODQGZLWKRXWGDPDJH
ƽ,IWKHFRPPXQLFDWLRQFLUFXLWRILQGRRUPDLQERDUGLVGDPDJHG",IWKHFRPPXQLFDWLRQFLUFXLWRIRXWGRRUPDLQERDUG$3LVGDPDJHG"
0DOIXQFWLRQGLDJQRVLVSURFHVV
E6
If the unit operates normally
before malfunction
Check the connection
wire according to the
wiring diagram.
Check built-in wiring
of indoor and outdoor
unit
Replace the
wire
Is the malfunction
eliminated?
If the connection wire
is connected well?
Reconnect the wire or
replace the connection
wire according to the
wiring diagram.
If the wiring is
damaged?
Check the malfunction
type with communication
malfunction detector
Malfunction of outdoor
communication circuit
Replace indoor
mainboard AP2
Is the malfunction
eliminated?
Replace outdoor
mainboard AP1
Is the malfunction
eliminated?
End
58
Installation and Maintenance
Service Manual
13.Flow chart for outdoor communitcation circuit detecting:
7HVWWKHYROWDJHEHWZHHQ1SRLQWRIZLULQJERDUGDQGFRPPXQLFDWLRQFDEOHZLWKXQLYHUVDOPHWHU7KHYROWDJHVKDOOEH
YDULDEOH2WKHUZLVHLWPLJKWEHPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRUPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLWRU
ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW3OHDVHHQVXUHWKDWWKHUHLVQRPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRU
ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW$IWHUUHPRYLQJWKHPDOIXQFWLRQRILQGRRUXQLWUHPRYHWKHPDOIXQFWLRQRI
RXWGRRUXQLW
7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KHYROWDJHVKRXOGEH
YDULDEOH7HVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KH
YROWDJHVKRXOGEHYDULDEOH7HVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW
7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KHYROWDJHVKRXOG
EHYDULDEOHWHVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI&7KH
YROWDJHVKRXOGEHYDULDEOHWHVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW
7HVWWKHYROWDJHEHWZHHQSLQRI5ZKLWHDQGSLQRI87KHYROWDJHVKRXOGEHYDULDEOH7HVWYROWDJHEHWZHHQ
SLQRI5ZKLWHDQGSLQRI8ZLWKXQLYHUVDOPHWHU7KHYROWDJHVKRXOGEHYDULDEOH2WKHUZLVHWKHUHLVPDOIXQFWLRQRI
PDLQERDUGRIRXWGRRUXQLW
Installation and Maintenance
59
Service Manual
Start
Measure voltage at the
Test 10 position as
shown in the diagram
with a voltmeter
Value jumping
N
Y
Measure voltage at the
Test 15 position as
shown in the diagram
with a voltmeter
Y
Value jumping
N
Y
Fault with
outdoor unit
Measure voltage at the
Test 11 position as
shown in the diagram
with a voltmeter
Value jumping
End
N
Y
Measure voltage at the
Test 12 position as
shown in the diagram
with a voltmeter
N
Value jumping
Y
The communication
circuit of the outdoor
unit is normal
60
Installation and Maintenance
Service Manual
9.3 Troubleshooting for Normal Malfunction
1. Air Conditioner Can't be Started Up
3RVVLEOH&DXVHV
1RSRZHUVXSSO\RUSRRU
FRQQHFWLRQIRUSRZHUSOXJ
'LVFULPLQDWLQJ0HWKRG$LUFRQGLWLRQHU6WDWXV
7URXEOHVKRRWLQJ
&RQ¿UPZKHWKHULW
VGXHWRSRZHUIDLOXUH,I\HV
$IWHUHQHUJL]DWLRQRSHUDWLRQLQGLFDWRULVQ¶WEULJKW ZDLWIRUSRZHUUHFRYHU\,IQRWFKHFNSRZHU
DQGWKHEX]]HUFDQ
WJLYHRXWVRXQG
VXSSO\FLUFXLWDQGPDNHVXUHWKHSRZHUSOXJLV
connected well.
Wrong wire connection between
LQGRRUXQLWDQGRXWGRRUXQLW
8QGHUQRUPDOSRZHUVXSSO\FLUFXPVWDQFHV
or poor connection for wiring
RSHUDWLRQLQGLFDWRULVQ
WEULJKWDIWHUHQHUJL]DWLRQ
terminals
&KHFNWKHFLUFXLWDFFRUGLQJWRFLUFXLWGLDJUDP
DQGFRQQHFWZLUHVFRUUHFWO\0DNHVXUHDOO
ZLULQJWHUPLQDOVDUHFRQQHFWHG¿UPO\
0DNHVXUHWKHDLUFRQGLWLRQHULVJURXQGHG
reliably
0DNHVXUHZLUHVRIDLUFRQGLWLRQHULVFRQQHFWHG
$IWHUHQHUJL]DWLRQURRPFLUFXLWEUHDNHUWULSVRIIDW
correctly
(OHFWULFOHDNDJHIRUDLUFRQGLWLRQHU
once
&KHFNWKHZLULQJLQVLGHDLUFRQGLWLRQHU&KHFN
ZKHWKHUWKHLQVXODWLRQOD\HURISRZHUFRUGLV
GDPDJHGLI\HVSODFHWKHSRZHUFRUG
0RGHOVHOHFWLRQIRUDLUVZLWFKLV
$IWHUHQHUJL]DWLRQDLUVZLWFKWULSVRII
6HOHFWSURSHUDLUVZLWFK
improper
$IWHUHQHUJL]DWLRQRSHUDWLRQLQGLFDWRULVEULJKW
Replace batteries for remote controller
0DOIXQFWLRQRIUHPRWHFRQWUROOHU ZKLOHQRGLVSOD\RQUHPRWHFRQWUROOHURUEXWWRQV
Repair or replace remote controller
KDYHQRDFWLRQ
2. Poor Cooling (Heating) for Air Conditioner
3RVVLEOH&DXVHV
6HWWHPSHUDWXUHLVLPSURSHU
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motor is set too low
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conditioner
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range
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details
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Compressor can't operate
details
3. Horizontal Louver Can't Swing
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connection
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diagram
Stepping motor is damaged
Stepping motor can't operate
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can't operate
Main board is damaged
Installation and Maintenance
7URXEOHVKRRWLQJ
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61
Service Manual
4. ODU fan Motor Can't Operate
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connection
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fan capacitor.
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0RWRURIRXWGRRUXQLWLVGDPDJHG is bad and ODU compressor generates a lot of
EHWWHUUHSODFHWKHFRPSUHVVRUZLWKDQHZRQH
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5. Compressor Can't Operate
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connection
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fan capacitor.
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Repair or replace compressor
between compressor terminals and it's 0
&\OLQGHURIFRPSUHVVRULVEORFNHGCompressor can't operate
Repair or replace compressor
Capacity of compressor is
damaged
6. Air Conditioner is Leaking
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7. Abnormal Sound and Vibration
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62
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Installation and Maintenance
Service Manual
11. Removal Procedure
Caution: discharge the refrigerant
completely before removal.
11.1 Removal Procedure of Indoor Unit
Steps
Procedure
1.Remove panel
2SHQWKHIURQWSDQHO3XVKWKHURWRUVKDIW
RQERWKVLGHVRIWKHSDQHOWRPDNHLW
VHSDUDWHIURPWKHJURRYH5HPRYHWKH
panel.
Panel
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3.Remove horizontal louver and front case
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86
Installation and Maintenance
Service Manual
Steps
Procedure
4.Remove electric box assy
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box assy.
Display Board
Electric Box Assy
5.Remove evaporator
Pipe Clamp
1
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connecting pipe.
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Installation and Maintenance
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87
Service Manual
Steps
Procedure
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88
Installation and Maintenance
Service Manual
11.2 Removal Procedure of Outdoor Unit
Warning: Be sure to wait for a minimum of 20 minutes
after turning off all power supplies and discharge the
refrigerant completely before removal.
Steps
Procedure
1.Remove big handle
Before disassamble．
Remove 1 connection screw fixing big
handleand then removethe big handle.
big handle
2. Remove top cover
top cover
Remove 3 connection screws among
top cover plate, front panel and right
sideplate. Then remove top cover
plate.
Installation and Maintenance
89
Service Manual
3.Remove grille and front panel
Remove connection screws between the front grille
and the front panel. Then remove the front grille.
Remove connection screws connecting the front
panel with the chassis and the motor support, and
then remove the front panel.
Grille
Panel
4.Remove axial flow blade
Axial flow blade
Remove the nut fixing the blade and then
remove the axial flow blade.
5.Remove right side plate
Remove connection screws connecting the right
side plate with the valve support and the electric
box. Then remove the right side plate.
90
Right side plate
Installation and Maintenance
Service Manual
6.Remove electric box assy
Electric box assy
Remove the 2 screws fixing the cover of electric box. Lift to remove the cover. Loosen the
wire and disconnect the terminal. Lift to remove the electric box assy.
7.Remove 4-way valve assy
Unscrew the fastening nut of the 4-way Valve
Assy coil and remove the coil. Wrap the 4-
4-way Valve Assy
way Valve Assy with wet cotton and unsolder
the 4 weld spots connecting the 4-way Valve
Assy to take it out.(Note: Refrigerant should
be discharged firstly.) Welding process
should be as quickly as possible and keep
wrapping cotton wet all the time. Be sure not
to burn out the lead-out wire of compressor.
8.Remove capillary sub-assy
Unsolder weld point of capillary Sub-assy,
Capillary Sub-assy
valve and outlet pipe of condensator. Then
remove the capillary Sub-assy. Do not block
the capillary when unsoldering it. (Note: before unsoldering,discharge refrigerants
completely)
Installation and Maintenance
91
Service Manual
9.Remove motor and motor support
Motor support
Remove the 4 tapping screws fixing the motor.
Pull out the lead-out wire and remove the
motor. Remove the 2 tapping screws fixing
Motor
the motor support. Lift motor support to remove it.
10.Remove clapboard sub-assy
Clapboard Sub-Assy
Loosen the screws of the Clapboard Sub-Assy .
The Clapboard Sub-Assy has a hook on the
lower side. Lift and pull the Clapboard Sub-Assy
to remove.
92
Installation and Maintenance
Service Manual
11.Remove Compressor
1
Remove the 2 screws fixing the gas valve.
Unsolder the welding spot connecting gas valve
and air return pipe and remove the gas valve.
(Note: it is necessary to warp the gas valve when
unsoldering the welding spot.) Remove the 2
screws fixing liquid valve. Unsolder the weld-
Liquid valve
ing spot connecting liquid valve and remove the
liquid valve.
Gas valve
2
Remove the 3 footing screws of the compressor
and remove the compressor.
Compressor
Installation and Maintenance
93
Service Manual
Appendix:
Appendix 1: Reference Sheet of Celsius and Fahrenheit
Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32
Set temperature
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61
60.8
16
62/63
62.6
17
64/65
64.4
18
66/67
66.2
19
68
68
20
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69/70
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71/72
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73.4
23
75/76
75.2
24
77
77
25
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29
86
86
30
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55/56
55.4
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57/58
57.2
14
59/60
59
15
61/62
60.8
16
63
62.6
17
64/65
64.4
18
66/67
66.2
19
68/69
68
20
70/71
69.8
21
72
71.6
22
73/74
73.4
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24
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77
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30
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31
90
89.6
32
91/92
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95
35
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36
99
98.6
37
Ambient temperature
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5
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30 m
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30 m
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30 m
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difference
5m
5m
10 m
10 m
10 m
10 m
10 m
20 m
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20
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15
20
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30
120
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60
120
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/
250
250
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350
350
94
Installation and Maintenance
Service Manual
Appendix 3: Pipe Expanding Method
Pipe
Note:
Pipe cutter
Improper pipe expanding is the main cause of refrigerant leakage.Please
expand the pipe according to the following steps:
Leaning
Uneven
Burr
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Improper expanding
leaning
damaged
surface
crack
uneven
thickness
The length is equal
Installation and Maintenance
95
Service Manual
Appendix 4: List of Resistance for Ambient Temperature Sensor
Resistance Table for Indoor and Outdoor Ambient Temperature Sensors (15K)
Temp(ć ) Resistance(kΩ)
-19
138.1
-18
128.6
-17
121.6
-16
115
-15
108.7
-14
102.9
-13
97.4
-12
92.22
-11
87.35
-10
82.75
-9
78.43
-8
74.35
-7
70.5
-6
66.88
-5
63.46
-4
60.23
-3
57.18
-2
54.31
-1
51.59
0
49.02
1
46.6
2
44.31
3
42.14
4
40.09
5
38.15
6
36.32
7
34.58
8
32.94
9
31.38
10
29.9
11
28.51
12
27.18
13
25.92
14
24.73
15
23.6
16
22.53
17
21.51
18
20.54
19.63
19
96
Temp(ć ) Resistance(kΩ)
20
18.75
21
17.93
22
17.14
23
16.39
24
15.68
25
15
26
14.36
27
13.74
28
13.16
29
12.6
30
12.07
31
11.57
32
11.09
33
10.63
34
10.2
35
9.779
36
9.382
37
9.003
38
8.642
39
8.297
40
7.967
41
7.653
42
7.352
43
7.065
44
6.791
45
6.529
46
6.278
47
6.038
48
5.809
49
5.589
50
5.379
51
5.197
52
4.986
53
4.802
54
4.625
55
4.456
56
4.294
57
4.139
58
3.99
Temp(ć ) Resistance(kΩ)
59
3.848
60
3.711
61
3.579
62
3.454
63
3.333
64
3.217
65
3.105
66
2.998
67
2.896
68
2.797
69
2.702
70
2.611
71
2.523
72
2.439
73
2.358
74
2.28
75
2.206
76
2.133
77
2.064
78
1.997
79
1.933
80
1.871
81
1.811
82
1.754
83
1.699
84
1.645
85
1.594
86
1.544
87
1.497
88
1.451
89
1.408
90
1.363
91
1.322
92
1.282
93
1.244
94
1.207
95
1.171
96
1.136
97
1.103
Temp(ć )
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
Resistance(kΩ)
1.071
1.039
1.009
0.98
0.952
0.925
0.898
0.873
0.848
0.825
0.802
0.779
0.758
0.737
0.717
0.697
0.678
0.66
0.642
0.625
0.608
0.592
0.577
0.561
0.547
0.532
0.519
0.505
0.492
0.48
0.467
0.456
0.444
0.433
0.422
0.412
0.401
0.391
0.382
Installation and Maintenance
Service Manual
Resistance Table for Indoor and Outdoor Tube Temperature Sensor (20K)
Temp(ć ) Resistance(kΩ)
-19
181.4
-18
171.4
-17
162.1
-16
153.3
-15
145
-14
137.2
-13
129.9
-12
123
-11
116.5
-10
110.3
-9
104.6
-8
99.13
-7
94
-6
89.17
-5
84.61
-4
80.31
-3
76.24
-2
72.41
-1
68.79
0
65.37
1
62.13
2
59.08
3
56.19
4
53.46
5
50.87
6
48.42
7
46.11
8
43.92
9
41.84
10
39.87
11
38.01
12
36.24
13
34.57
14
32.98
15
31.47
16
30.04
17
28.68
18
27.39
19
26.17
Installation and Maintenance
Temp(ć ) Resistance(kΩ)
20
25.01
21
23.9
22
22.85
23
21.85
24
20.9
25
20
26
19.14
27
18.13
28
17.55
29
16.8
30
16.1
31
15.43
32
14.79
33
14.18
34
13.59
35
13.04
36
12.51
37
12
38
11.52
39
11.06
40
10.62
41
10.2
42
9.803
43
9.42
44
9.054
45
8.705
46
8.37
47
8.051
48
7.745
49
7.453
50
7.173
51
6.905
52
6.648
53
6.403
54
6.167
55
5.942
56
5.726
57
5.519
58
5.32
Temp(ć ) Resistance(kΩ)
59
5.13
60
4.948
61
4.773
62
4.605
63
4.443
64
4.289
65
4.14
66
3.998
67
3.861
68
3.729
69
3.603
70
3.481
71
3.364
72
3.252
73
3.144
74
3.04
75
2.94
76
2.844
77
2.752
78
2.663
79
2.577
80
2.495
81
2.415
82
2.339
83
2.265
84
2.194
85
2.125
86
2.059
87
1.996
88
1.934
89
1.875
90
1.818
91
1.736
92
1.71
93
1.658
94
1.609
95
1.561
96
1.515
97
1.47
Temp(ć )
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
Resistance(kΩ)
1.427
1.386
1.346
1.307
1.269
1.233
1.198
1.164
1.131
1.099
1.069
1.039
1.01
0.983
0.956
0.93
0.904
0.88
0.856
0.833
0.811
0.77
0.769
0.746
0.729
0.71
0.692
0.674
0.658
0.64
0.623
0.607
0.592
0.577
0.563
0.549
0.535
0.521
0.509
97
Service Manual
Resistance Table of Outdoor Discharge Temperature Sensor(50K)
Temp(ć ) Resistance(kΩ)
-29
853.5
-28
799.8
-27
750
-26
703.8
-25
660.8
-24
620.8
-23
580.6
-22
548.9
-21
516.6
-20
486.5
-19
458.3
-18
432
-17
407.4
-16
384.5
-15
362.9
-14
342.8
-13
323.9
-12
306.2
-11
289.6
-10
274
-9
259.3
-8
245.6
-7
232.6
-6
220.5
-5
209
-4
198.3
-3
199.1
-2
178.5
-1
169.5
0
161
1
153
2
145.4
3
138.3
4
131.5
5
125.1
6
119.1
7
113.4
8
108
9
102.8
Temp(ć ) Resistance(kΩ)
10
98
11
93.42
12
89.07
13
84.95
14
81.05
15
77.35
16
73.83
17
70.5
18
67.34
19
64.33
20
61.48
21
58.77
22
56.19
23
53.74
24
51.41
25
49.19
26
47.08
27
45.07
28
43.16
29
41.34
30
39.61
31
37.96
32
36.38
33
34.88
34
33.45
35
32.09
36
30.79
37
29.54
38
28.36
39
27.23
40
26.15
41
25.11
42
24.13
43
23.19
44
22.29
45
21.43
46
20.6
47
19.81
48
19.06
Temp(ć ) Resistance(kΩ)
49
18.34
50
17.65
51
16.99
52
16.36
53
15.75
54
15.17
55
14.62
56
14.09
57
13.58
58
13.09
59
12.62
60
12.17
61
11.74
62
11.32
63
10.93
64
10.54
65
10.18
66
9.827
67
9.489
68
9.165
69
8.854
70
8.555
71
8.268
72
7.991
73
7.726
74
7.47
75
7.224
76
6.998
77
6.761
78
6.542
79
6.331
80
6.129
81
5.933
82
5.746
83
5.565
84
5.39
85
5.222
86
5.06
87
4.904
Temp(ć )
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
Resistance(kΩ)
4.754
4.609
4.469
4.334
4.204
4.079
3.958
3.841
3.728
3.619
3.514
3.413
3.315
3.22
3.129
3.04
2.955
2.872
2.792
2.715
2.64
2.568
2.498
2.431
2.365
2.302
2.241
2.182
2.124
2.069
2.015
1.963
1.912
1.863
1.816
1.77
1.725
1.682
1.64
Note: The information above is for reference only.
98
Installation and Maintenance

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