1
7
Installation and Maintenance
NO.
Malfunction
Name
Display Method of Indoor Unit
Display Method of
Outdoor Unit
(Indicator has 3 kinds
of display status and
they will be displayed
circularly every 5s.)
A/C status
Possible Causes
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF 0.5s)
□OFF
■Illuminated
ƿ
Blink
Operation
Indicator
Cool
Indicator
Heating
Indicator
D5
(D40)
D6
(D41)
D16
(D42)
D30
(D43)
20 Defrosting
H1
OFF 3S
and blink
once
Defrosting will occur in heating
mode. Compressor will operate
while indoor fan will stop
operation.
Its the normal state
21
Static
dedusting
protection
H2
OFF 3S
and blink
twice
/
22
Overload
protection for
compressor
H3
OFF 3S
and blink
3 times
ƶ
ƿ
ƿ
ƶ
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)
23 System is
abnormal
H4
OFF 3S
and blink
4 times
Ƶ
ƶ
Ƶ
Ƶ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Refer to the malfunction analysis
(overload, high temperature
resistant)
24 IPM
protection
H5
OFF 3S
and blink
5 times
ƶ
ƿ
ƶ
Ƶ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
25 PFC
protection
HC
OFF 3S
and blink
6 times
ƶ
Ƶ
ƿ
ƿ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Refer to the malfunction analysis
26
Desynchron-
izing of
compressor
H7
OFF 3S
and blink
7 times
ƶ
ƿ
Ƶ
ƿ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
27
Decrease
frequency
due to high
temperature
resistant
during
heating
operation
H0
OFF 3S
and blink
10 times
Ƶ
ƶ
ƿ
ƿ
All loads operate normally, while
operation frequency for
compressor is decreased
Refer to the malfunction analysis
(overload, high temperature
resistant)
28 Failure start-
up
LC
OFF 3S
and blink
11 times
ƶ
ƿ
ƶ
ƿ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Refer to the malfunction analysis
29
Malfunction
of phase
current
detection
circuit for
compressor
U1
OFF 3S
and blink
13 times
ƶ
ƿ
Ƶ
ƶ
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel AP1
Содержание DHY09CSB21S
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