Haier AB182ACERA Service Manual page 42

auto-check circuit. Before auto-check, please ensure the input values (sensor, pressure switch)
normal, or the buzzer will sound 5 times to show there is abnormal; all the ports will output as the
following sequence: run lamp-timer lamp-electric heater-water pump-compressor/compressor
lamp-outdoor motor-4-way valve; after the auto-check is finished, the buzzer sounds once.
9.11 Outdoor crankcase heater (only for the unit with low ambient cooling function)
For the unit without outdoor PCB, but with low ambient cooling function, outdoor crankcase heater
will be controlled by indoor unit. Once being electrified, electric heater will begin to work until the
compressor is running.
10. System protection
10.1 3-minute protection for compressor startup
After the compressor stops, at least 3 minutes later, the compressor can restart up; if the unit is
powered off in running, after being electrified, 3 minutes later, the compressor can restart up. Being
electrifed for the first time, there is 3-minute delay protection.
10.2 Anti-current rush
2 seconds later after compressor is running, outdoor motor can work.
11. Trouble code
The remote receiver can show the failure code independently.
Remote
receiver, Display of
indoor wired
PCB flash controller
times
1 01
2 02
3 4A
4 49
5 48
6 53
8 07
9 06
10 08
42
Commercial Air Conditioner
Display of
central Fault description
controller
01D Indoor ambient
sensor failure
02D Indoor coil temp. sensor
failure
11D Outdoor ambient
sensor failure
12D Outdoor coil temp. sensor
failure
10D Over-current protection
14D High pressure abnormal
06D Communication
wired controller and indoor
abnormal
05D Communication
indoor and
abnormal
21D Drainage system abnormal
Possible cause
temp. Sensor disconnected,
short circuit for over 2m
Sensor disconnected,
short circuit for over 2m
temp. Sensor disconnected,
short circuit for over 2m
Sensor disconnected,
short circuit for over 2m
CT current
standard for 3 times in
30m
High pressure switch
acts for 3 times in 30m
between Communication
abnormal for over 4m
between Communication
outdoor abnormal for over 4m
Float
Model: AB182ACERA
AC182ACERA
Remedy
Resumable
Resumable
Resumable
Resumable
over Check and reset to
resume
Check and reset to
resume
Resumable
Resumable
switch Resumable