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Airwell johnson DCH Series User Manual

Airwell johnson DCH Series
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TROUBLESHOOTING
DCH DCI 45 Version - 1
10.2.7 IPM malfunction or IGBT over-strong current protection diagnosis and
solution (P0)
Error Code
P0
Malfunction decision
conditions
When the voltage signal that IPM send to compressor drive chip
is abnormal, the display LED will show “P0” and AC will turn off.
Supposed causes
Wiring mistake
IPM malfunction
Outdoor fan ass’y faulty
Compressor malfunction
Outdoor PCB faulty
Trouble shooting:
Check the wiring between main PCB
and compressor
Correct the connection or replace
the wires and connectors.
Yes
No
Check the IPM No
Yes
Replace the IPM board or replace
the main PCB
Check the outdoor fan and the
outdoor unit ventilation
No
Please refer to the solution of Fan
Speed Has Been Out Of Control
malfunction
Yes
Check the compressor resistance
values
No
Replace the compressor.
Yes
Replace the outdoor main PCB
IPM continuity check
Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital
tester to measure the resistance between P and UVWN; UVW and N.
Digital tester
Normal resistance value
Digital tester
Normal resistance value
(+)Red
(-)Black
(Several MΩ)
(+)Red
(-)Black
(Several MΩ)
P
N
U
N
U
V
V
W
W
(+)Red

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Airwell johnson DCH Series Specifications

General IconGeneral
BrandAirwell
Modeljohnson DCH Series
CategoryAir Conditioner
LanguageEnglish

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