Midea M2OC-18HRDN1-M - Page 37

Outdoor unit display LED STATUS
PF PFC module protection
No
No
Yes
Check whether the power
supply of bridge rectifiers
output port is 325VDC
Replace bridge rectifiers
Does the unit work
normally ?
No
Check whether the
power supply of bridge
rectifiers input port is
normal.
Replace the
outdoor PCB
Yes
Replace the PFC inductance
Check whether the
voltage between P and
N port in IPM is 380V.
No
Replace outdoor e-box.
Yes
Check whether the
wiring between PCB
and PFC module is
normal.
Yes
No
Check the voltage of power supply, if the voltage
is about 220V, turn off the power supply and
turn it on again after 1 minute
Yes
Check whether
the PFC
inductance is
normal.
Replace PFC