Mitsubishi Electronics PURY-P400, P500YMF-C Power terminal block Voltage Verify the power

Phenomena		Factors
3 When the remote	1) Power supply from the transformer is not available to the control board of BC controller.
control SW is turned	1	The original power supply of the BC controller is not turned on.
on, the indication	2	Removal of connectors (CN12, CN38, CNTR) on the control board of the BC controller.
goes off after	3	Fuse on the control board of the BC controller is blown.
approximately 20- 30	4	Transformer defects of the BC controller and a malfunction.
seconds, and indoor	5	Defects on the control board of the BC controller
unit stops.

Check method and handling

Check the BC controller
power terminal block
voltage
NO	Verify the power	Power supply
	supply wiring original
220 ~ 240V?		reapplying
	power supply.
YES
Fuse check on the
board
YES	220 ~ 240V circuit
Fuse blown off	short and ground
	checks
NO
Connector removal
checks
(CN03, CN12, CNTR)
YES	Connector connection
Removed?
	defects
NO
Check for resistance
value of transformer
	*1
	Check for factors of
NO	transformer cut
Within spec.?	Earth route on the board
	Earth route of sensor
YES	and LEV
BC controller		Modify the defective
Defects for the		places
control board

*1 As for transformer checks, It is subject to the failure judgment method of main parts in 4.5.

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