AUKS AL-H18/4DR1(U), Service Manual

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AUKS DC Inverter 1 Drive1 50HZ R410A Trouble shooting
118
J4
The communication
between main PCB
and DC fan motor
drive module failure
Yes
DC fan motor drive module failure
DC fan failure
J7
Outdoor unit main
control PCB ERROM
module failure
No Mail PCB failure
31
Module protection
(F0)
Yes
Supply voltage below level let the current excessive
Supply voltage exceed limit
Outdoor fan stop or low speed
32
Module hardware
protection
Yes
Supply voltage below level let the current excessive
Supply voltage exceed limit
Outdoor fan stop or low speed
33
Module software
protection
Yes
Supply voltage below level let the current excessive
Supply voltage exceed limit
Outdoor fan stop or low speed
34
Compressor
unconnected
Yes
The connect of driving module and DC inverter
compressor incorrect
Driving module failure
Compressor failure
35
Compressor phase
current overload
protection
Yes
Compressor overload
Compressor coil disconnect
Inverter driving board failure
Compressor failure
36
DC bus voltage
over-voltage or
under-voltage failure
Yes
Supply voltage below level
Supply voltage exceed limit
Driving module failure
37
Temperature sensor
of drive module heat
fins failure
Yes Inverter driving board failure
38 Yes
Driving module failure
Drive module high
temperature limit
frequency failure
Compressor failure
Outdoor unit fan stop or low speed
39
Drive module high
temperature
shutdown protection
Yes
Driving module failure
Compressor failure
Temperature sensor failure
3E
DC inverter
compressor
running out of step
No Once confirm the unrecoverable