Sanyo XHS2432, XHS3632, CH2432, CH3632 Service procedures Symptoms and parts to inspect

4. Service procedures

(5)Symptoms and parts to inspect

1)Symptom: LCD on the remote controller does not display and remote controller does not

operate.

Miswiring of	Yes	Is there 230-208 V AC
power supply		between U1 and U2
wires and		of the 8P terminal
indoor/outdoor		plate?
control lines
			No
Correct the		Check and repair the
wiring. Remove the		power breaker etc.
socket connected to
the OC plug on the
PCB and connect to
the EMG plug instead.

No

Start

Is the LED (D80) on the indoor unit PCB lit?

No

Is there 12 V DC between R2 and R3 on the 8P terminal plate of the indoor unit?

No

Is there 230-208 V AC between R and S of the indoor PCB?

Yes

Yes

Yes	Is there 12 V DC	No	Repair the
	between 2 and 3		remote
	of the remote		controller
	controller?		wiring.

Yes

Replace the remote controller.

Section

1

2

3

4

Correct the	No	Are the connections		No	Has the indoor
connections		for the 4P connector			unit PCB fuse blown?
		for the indoor unit’s
						Yes
		PCB power trans-
		former good?
			Yes
							No			No
Replace the	No	Is there 15 V AC			Is the primary			Is the 230-208 V AC			Replace the
indoor unit power		between 1 and 2			side of the indoor			circuit shorted?			indoor unit PCB.
transformer.		of the 4P connector			power transformer
									Yes
		for the indoor unit’s			shorted?
		power transformer?
						Yes
			Yes

Replace the indoor unit PCB.

Replace the indoor unit’s power transformer.

Replace or repair.

1144_THS_I

SM830076

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