Ipm Malfunction Or Igbt Over-Strong Current Protection (P0) - Bosch Climate 5000 Series Service Manual
Ductless air conditioner / heat pump outdoor unit
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5 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit
8.9 IPM malfunction or IGBT over-strong current protection (P0)
Error Code
Malfunction decision conditions
Supposed causes
Table 32
Troubleshooting:
Check the wiring between main PCB
and compressor. Check if there is any
error.
Check the outdoor fan and the
Check the compressor resistance
values, are they within acceptable
Replace the outdoor main PCB
Figure 47
In most cases the main PCB will fail before the compressor fails. To
check if the compressor fails, check the coloring of the material wrapped
around the compressor. If the part that touches the compressor
has turned brownish due to the compressor running hot, then the
compressor most likely has failed.
Data subject to change
P0
When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show
"P0" and AC will turn off.
Wiring mistake
IPM malfunction
Outdoor fan assembly faulty
Compressor malfunction
Outdoor PCB faulty
No
Check the IPM
Yes
outdoor unit ventilation
Yes
parameters?
Yes
Correct the connection or replace
Yes
the wires and connectors.
Replace the IPM board or replace
No
the outdoor main PCB
Please refer to the solution of 【Fan
No
Speed Has Been Out Of Control】
malfunction
No
Replace the compressor.
Service Manual
04.2020 | Bosch Thermotechnology Corp.
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