Friedrich MW12C1H, MW09C1H, MR09C1H, MR12C1H manual Start

Troubleshooting

Mainly detect:

Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken

The failure diagnosis process is as follows:

Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any			Replace it as per the
		Y	wiring diagram and		If the fault is eliminated?
damage or
			reconnect the wires
short-circuit?
N
Remove the PFC capacitor
and measure resistance				N
between the two terminals.
		The capacitor is
Is the resistance around zero?	Y	short circuited and		Restart the unit	If the fault is eliminated?	Y
			the capacitor
		should be repla-
		ced
N
Disconnect the terminals for the
reactor and measure the resistance				N
between the two terminals of the
reactor by an ohm gauge
Whether there is any damage	Y	Replace the reactor		Restart the unit	If the fault is eliminated?	Y
or short-circuit?
N
Replace the control				N
panel AP1
						Y
End

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