Bosch BMS500-AAU036-1AHCXC - PFC Module Protection Error (PC 0 F)

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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
8.6.6 PFC module protection error (PC 0F)
Error Code PC 0F
Malfunction decision conditions
When the voltage signal that PFC sends to main control board is abnormal, the display LED will show
"E6" and AC will turn off.
Supposed causes
f Improper / Incorrect Wiring
f Outdoor PCB faulty
f PFC module inductance faulty
f PFC module faulty
Table 36
Troubleshooting:
Figure 64
PFCmodule protection
Check whether the
connecting line between
main boardand thePFC
module (IPM module) is
connectedtightly
Yes
Check whether thevoltage
rangeofP-N on IPM
module is normal? DC277-
356V for 18K & 27K models,
DC 277-410Vfor 36K model
No
Checkwhether the
inductanceofPFC module
is good?Ifthe inductanceis
good, theresistanceofthe
two ports should be 0
Yes
Replace theinductance
No
Connect it tightly, check
if connection is normal
Replacethe outdoor main board
Yes
Yes
No
No
Replacethe PFCmodule(IPM
module)
Problemissolved