Bosch Climate 5000 Series Service Manual page 78

Service Manual
8.6.16 Outdoor compressor lack phase protection (PC 43)
Troubleshooting:
Figure 82
8.6.17 Outdoor unit IR chip drive failure (PC 45)
Troubleshooting:
Figure 83
7 8 |
Power off,then restart the unit
2 minutes later.Is it still
displaying the error code
Yes
Check both ends of
compressor connecting
line .Are all the connections
good?
Yes
Check whether the three-
phase resistance of the
compressor is symmetrical
Yes
Check the compressor three-
phase output for obvious
open circuit
Yes
Trouble is solved
Power off,then restart the unit
2 minutes later.
Replace the inverter module
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
The unit operates
No
normally
Correct the connections
No
Replace the compressor
No
Replace the main PCB
No
Yes
PCB.