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Malfunction code:
Malfunction description
Normal
0
Defrosting
temperature
sensor abnormal
Ambient temperature sensor
abnormal
Suction temperature sensor
abnormal
Discharging
temperature
sensor abnormal
Coil
temperature
sensor
abnormal
Over current protection
Current sensor abnormal
Overload protection
IPM protection
Read
EEPROM
value
wrongly
Discharging
temperature
over high abnormal
High
pressure
switch
abnormal
Voltage over low protection
Voltage over high protection
Low
pr essure
switch
abnormal
Recover the parameter set
when out of factory
Clear
the
malfunction
memory
Need reset
Radiator temperature sensor
abnormal
Commercial Air Conditioner
LED display on
Code
the testing
board
Normal
1
E.4.
2
E.1.
3
E.3.
4
E.2.
5
E.5.
O.C.
6
P O.C.
7
C.T.
O.L
8
P O.L.
E.P.
9
P E.P.
10
P E.E.
O.D
11
P O.D.
12
.
O.P
L.U.
13
P L.U.
O.U.
14
P O.U.
15
O.H.
16
P I.A.
17
P C.T.
18
P R .E.
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- 65 -
If sent to
indoor
Remarks
unit?
Yes
Yes
Resumable
Yes
Resumable
Yes
Resumable
Yes
Resumable
Yes
Resumable
Yes
After there are current malfunction for
3 times in 1 hour, the testing board will
display the last abnormal reason P
no
X.X. Need powered off and restart
Yes
After trouble shooting, need powered
off and restart
Yes
After there are current malfunction for
3 times in 1 hour, the testing board will
no
display the last abnormal reason P
Yes
no
X.X. Need powered off and restart
no
Need reset and restart
After there are current malfunction for
Yes
3 times in half an hour, the testing
board will display the last abnormal
no
reason P X.X. Need powered off and
restart
Yes
Resumable
Yes
After there are voltage malfunction for
3 times in 1 hour, the testing board will
display the last abnormal reason P
Yes
X.X. Need powered off and restart
Yes
Resumable
no
Need reset and restart
no
Need reset and restart
no
Need reset and restart
Not
used
temporarily
Model: AU55NFIAIA
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Troubleshooting
