Bosch Climate 5000 Series Service Manual page 66

Service Manual
7.6.10 Over voltage or too low voltage protection diagnosis and
solution (PC 01)
Error Code
Malfunction decision conditions
Supposed causes
Table 40
Troubleshooting:
Check the connections and
wires
Figure 86
Measure the DC voltage between P and N port (Fig. 99). The normal
value should be as shown below.
— When starting up the system, it is in 220V ~ 400V.
— When the system is in standby, 310V, 340V or 380V.
F or certain models, outdoor PCB could not be removed separately. In
this case, the outdoor electric control box should be replaced as a whole.
6 6 |
PC 01
An abnormal voltage rise or drop is detected by checking the specifi ed voltage detection circuit.

Power supply problems

System leakage or block

Outdoor PCB faulty

Transformer
Check the power supply
Yes
Yes
Check the voltage between P
and N
Yes
Check the reactor
Yes
Replace the reactor
Bosch Climate 5000 Series Ducted Type (Medium & High Static) Air Conditioner / Heat Pump (11.2022)
Stop the unit
No
Correct the connections or
No
replace the wires.
No
Replace the IPM board
No Replace outdoor main PCB
Figure 87