Table of Contents
Advertisement
Service Manual
Display Method of Indoor Unit
Malfunction
Dual-8
NO.
Name
Code
Display
System is
34
H4
abnormal
IPM
35
H5
protection
Module
36
temperature
H5
is too high
Internal motor
37
(fan motor) do
H6
not operate
Desynchro-
38
nizing of
H7
compressor
PFC
39
HC
protection
Outdoor DC
40
fan motor
L3
malfunction
power
41
L9
protection
Indoor unit
and outdoor
42
LP
unit doesn't
match
Failure start-
43
LC
up
Installation and Maintenance
Display Method of Outdoor
Indicator has 3 kinds of
Indicator Display (during
display status and during
blinking, ON 0.5s and OFF
blinking, ON 0.5s and OFF
0.5s)
0.5s
Operation
Cool
Heating
Indicator
Indicator
Indicator
Indicator
OFF 3S
OFF 3S
and blink
and blink
6 times
4 times
OFF 3S
OFF 3S
and blink
and blink
5 times
4 times
OFF 3S
OFF 3S
and blink
and blink
5 times
10 times
OFF 3S
and blink
11 times
OFF 3S
and blink
7 times
OFF 3S
OFF 3S
and blink
and blink
14 times
6 times
OFF 3S
and blink
23 times
OFF 3S
OFF 3S
and blink
and blink
20 times
9 times
OFF 3S
OFF 3S
and blink
and blink
19 times
16 times
OFF 3S
and blink
11 times
Unit
Yellow
Red
Green
Indicator
Indicator
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Internal fan motor, external fan
motor, compressor and electric
heater stop operation,guide
louver stops at present
location.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
OFF 3S
Outdoor DC fan motor
and
malfunction lead to compressor
blink
stop operation,
14 times
compressor stop operation and
Outdoor fan motor will stop
30s latter , 3 minutes latter
fan motor and compressor will
restart
compressor and Outdoor fan
motor can't work
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
A/C status
Possible Causes
Refer to the malfunction analysis
(overload, high temperature
resistant)
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev
detecting circuit.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
Refer to the malfunction analysis
DC fan motor malfunction or
system blocked or the connector
loosed
To protect the electronical
components when detect high
power
Indoor unit and outdoor unit doesn't
match
Refer to the malfunction analysis
41
Advertisement
Table of Contents
