45
Failure code
LED
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
definition
Failure description
Remarks
20-0
14
Defrosting
temp. sensor
Tdef1 failure
AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds, sensor
has no alarm when abnormal in cooling
mode.
Resumable
20-1
14
Defrosting
temp. sensor
Tdef2 failure
21
15
Ambient
temp. sensor
Tao failure
AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds.
Resumable
22-0
16
Suction
temp. sensor
Tsi failure
22-1
16
Suction
temp. sensor
Tsacc failure
AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds, sensor
has no alarm when abnormal in cooling
mode.
23-0
17
Discharging
temp. sensor
Tdi failure
AD value is below 11 (open circuit) or
over 1012 (short circuit) for 60 seconds. If
Tao≤0
℃
, no need to detect the open circuit
failure ( AD value is below 11.)
Resumable
23-1
17
Discharging
temp. sensor
Td1 failure
24-0
18
Oil temp.
sensor Toilp
failure
If AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds, alarm.
If Tao<0
℃
, there is no open circuit alarm.
If Tao>=0
℃
and ET>=0
℃
, no open circuit
alarm within 5 minutes.
Resumable
24-1
18
Oil temp.
sensor Toili
failure
If AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds, alarm.
If Tao<0
℃
or not normal running, no open
circuit alarm.
25-0
19
Heat
exchanger
inlet temp.
Toci1 failure
AD value is below 11 (open circuit) or over
1012 (short circuit) for 60 seconds, sensor
has no alarm when abnormal in cooling
mode.
Resumable
25-1
19
Heat
exchanger
inlet temp.
Toci2 failure
Inverter outdoor unit failure code indication on master unit
