Carrier 38MGRBQ18B-3 - DIAGNOSIS AND SOLUTION (CONT); PFC Module Protection Error

38MGRBQ: Service Manual
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DIAGNOSIS AND SOLUTION (CONT)
E6/ PC 0F (PFC module protection) error diagnosis and solution
Troubleshooting
ERROR CODE
E6/ PC 0F
MALFUNCTION DECISION
CONDITIONS
When the voltage signal that PFC sends to main control board is abnormal, the display LED displays E6 and
the unit turns off.
SUPPOSED CAUSES
Wiring mistake
Faulty inductance of PFC module
PCB module malfunction
PFC module protection
Check whether the
connecting line between
main board and the PFC
module(IPM module) is
connected well
Yes
Check whether the voltage
range of P-N on IPM
module is normal: DC277-
356V for 18-27KBtu/h;
DC277-410V for 36KBtu/h
No
Yes
Replace the inductance
No
Connect well.
Replace the outdoor main board
Yes
Yes
No
No
Replace the PFC module
(IPM module)
Problem solved
Check whether the PFC
module’s inductance is good.
If the inductance is good, the
resistance for the two ports is 0.