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38MGRBQ: Service Manual
DIAGNOSIS AND SOLUTION (CONT)
E6/ PC 0F (PFC module protection) error diagnosis and solution
ERROR CODE
MALFUNCTION DECISION
CONDITIONS
SUPPOSED CAUSES
Troubleshooting
PFC module protection
Check whether the
connecting line between
main board and the PFC
module(IPM module) is
connected well
Check whether the voltage
range of P-N on IPM
module is normal: DC277-
356V for 18-27KBtu/h;
DC277-410V for 36KBtu/h
Check whether the PFC
module's inductance is good.
If the inductance is good, the
resistance for the two ports is 0.
Replace the PFC module
(IPM module)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
E6/ PC 0F
When the voltage signal that PFC sends to main control board is abnormal, the display LED displays E6 and
the unit turns off.
Wiring mistake
Faulty inductance of PFC module
PCB module malfunction
No
Yes
No
Yes
No
No
Yes
Connect well.
Replace the outdoor main board
Replace the inductance
56
Yes
Problem solved
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