Bosch Climate 5000 Series Service Manual page 54

Service Manual
7.6.9 IPM malfunction or IGBT over-strong current protection diagnosis and
solution (PC 00)
Error Code
Malfunction decision conditions
Supposed causes
Table 37
Troubleshooting:
Figure 51
5 4 |
PC 00
When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show
the failure code and AC will turn off .

Wiring mistake

IPM malfunction

Outdoor fan assembly faulty

Compressor malfunction

Outdoor PCB faulty
Check the wiring between
PCB and compressor.
Does an error exist?
NO
Check if the IPM
installed correctly.
YES
IPM continuity check
Are the IPM terminal
resistance uniform?
YES
Check the outdoor fan and the
outdoor unit ventilation.
Is it in working order?
YES
Check the compressor
resistance values.
Are they uniform?
YES
Replace the outdoor PCB.
Bosch Wall Mounted Ductless Split Air Conditioner / Heat Pump IDU-ODU - BTC 769102301 A (11.2022)
Ensure proper connections or
YES
replace the wires and connectors.
Correct the installation, tighten the
NO
screws and apply silicon grease
Replace the IPM board or
NO
replace the outdoor PCB.
Please refer to the solution of the "fan
NO speed is operating outside of the normal
range" malfunction.
Replace the compressor.
NO
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..