Friedrich MW12C1H, MW09C1H, MR09C1H, MR12C1H manual How to Check simply the main part

Troubleshooting

9.4 How to Check simply the main part

Main Check Points:

Units of 115V: Use AC voltmeter to check wether the voltage between terminal L and N on the wiring board is 115V AC

Units of 115V: Whether the reactor (L) is correctly connected? Whether the connection is loose or fallen? Whether the reactor

(L) is damaged ?

Fault diagnosis process:

Switch on the unit and wait 1 minute

Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor (test3)

Voltage higher than 103.5V?		Fault with the		Replace the
For 115V Units	Y	voltage testing
				control panel
Voltage higher than 187V?
		circuit on contr-
				AP1
For 208~230V Units		ol panel AP1
N
Measure the AC voltage between
terminal L and N on wiring board
XT
		Switch off the
		power and repair
Voltage within 103.5~126.5V?		the supply power		Re-energize	If the fault is
	N	to restore the volt-		and switch		Y
For 115V Units					eliminated?
		age to 103.5~126.5		on the unit
		VVAC	For 115V
		Units
Y
Switch off the power and wait 20 minutes;
or use DC voltmeter to measure the volt-				N
age on the use DC voltmeter to measure
the voltage on the two ends of capacitor
(test3), until the voltage is lower than 20V
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
		Connect the rea-		Re-energize
If the wiring of		ctor L according to			If the fault
	N			and switch on		Y
reactor L is normal?		Electrical Wiring			is eliminated?
				the unit
		Diagram
Y
Replace the control				N
panel AP1
End

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