Pioneer YN018GMFI16M2D Service Manual page 49

9.3.2.11 PFC module protection (ODU PF)
PFC module protection
Check whether the
connecting line between
main board and the PFC
module is connected tightly
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
Check whether
inductance of PFC module
is good? If the inductance is
good, the resistance of the
two ports is 0
Yes
Replace the PFC module
9.3.2.12 Inverter compressor drive protection (ODU P7)
The trouble shooting is same with one of IPM module protection
(Only for
Connect it tightly, check
No
No
Yes Replace the outdoor main board
the
No Replace the inductance
YN036GMFI16M4D
)
normal or not
Trouble is solved
Yes