25
Failure code
Failure code
Inverter outdoor unit failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
de
fi
nition
Failure description
Remarks
20
20-0
Defrosting
temp.sensor
TE1 failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 60seconds, in
cooling mode, if the sensor is abnormal,
the unit does not deal with it, besides,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
20
20-1
Defrosting
temp.sensor
TE2 failure
21
21
Ambient temp.
sensor Ta
failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 60seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
22
22
Suction temp.
sensor Ts
failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 60seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
23
23
Discharging
temp.sensor Td
failure
After compressor is running for 5 minutes,
AD value is below 11(open circuit) or
over 1012(short circuit) for 60seconds, in
course of startup, defrosting and within 3
minutes after defrosting, no alarm
Resumable
24
24
Oil temp.sensor
Toil failure
AD value is below 11(open circuit) or over
1012(short circuit) for 60seconds, if Ta<=-
10degree or ET<=-10degree, within 5
minutes, no alarm
Resumable
26
26-0
Indoor
communication
failure
For continuous 200 cycles, can not
fi
nd
connected indoors
Resumable
26-1
26-1
For continuous 300seconds, the searched
indoor quantity is less than the set quantity.
26-2
26-2
For continuous 300seconds, the searched
indoor quantity is more than the set
quantity.
27
27
Oil temp.
too high
protection(Toil)
Toil
≥
110degree at interval of 25msec for
twice continuously, and over the set value,
then stop and alarm; 3 minutes later,
resume automatically. If it occurs 3 times
in an hour, con
fi
rm the failure.
Once
con
fi
rmation,
un-
resumable
28
28
High pressure
sensor Pd
failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 30seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
