Pfc Module Protection (J3) - Bosch Climate 5000 Series Service Manual

6 2 | Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Outdoor Unit

8.17 PFC module protection (J3)

Error Code
Malfunction decision conditions
Supposed causes
Table 40
Troubleshooting:
Make sure to test the resistance between every two ports of U, V, W of
IPM and P, N. If any results of them is 0 or close to 0, the IPM is
defective. Otherwise, please follow the procedure below.
Figure 60
Data subject to change
J3
IPM sends abnormal voltage signal to compressor driver chip, the display will show error code "J3" and
system will stop operation.
Wiring mistake
IPM malfunction
Outdoor fan assembly faulty
Compressor malfunction
Outdoor PCB faulty
PFC module protection enabled
Check the connection
between the main PCB
and PFC module
Yes
Measure whether the voltage
Measure whether the voltage
between P and N is normal
between P and N is normal
refer to the Appendix 3
refer to the Appendi d d x i i 3
No
Check whether the
inductance of PFC module
inductance of PFC module
is good. If the inductance is
is good If the inductance is
good, the resistance of the
good, the resistance of the
two ports is 0
0
Yes
Replace the PFC module
eplace the PFC module
No Correct the connection
No
Yes Replace the outdoor main PCB
No Replace the inductance
Replace the inductance
Service Manual
04.2020 | Bosch Thermotechnology Corp.