Mitsubishi Electronics PL42FK21, PL36FK31, PL12FK1 Troubleshooting, OC194-36, Troubles in Test RUN

11 TROUBLESHOOTING

1.TROUBLES IN TEST RUN

Symptom		Cause			Check points
The display “CENTRALLY	1)	Wrong address setting of remote con-	1) Check the address setting of remote controller
CONTROLLED” on remote		troller/indoor controller board.	and indoor controller.
controller does not disap-	2) Timer adapter is connected to the		2) Make sure the timer adapter is used correctly.
pear.		remote controller.	3) 1 Turn another remote controller’s DIP SW17-
	3)	Signal transmission error between		7 ON to make it sub controller.
		indoor unit and remote controller.	2 Connect the sub controller to the unit, and
				turn circuit breaker ON.
			● If the display “centrally controlled” disap-
				pears, replace the original remote controller.
			● If the display remains the same, replace the
				indoor controller board.
When remote controller	1)	Signal transmission error between	1) 1 Connect a sub remote controller.
POWER button is turned		indoor unit and remote controller	2 Turn circuit breaker ON.
ON, the check code				If the display “centrally controlled” remains,
“E0”appears.				replace the indoor controller board.
			3 If the display disappears, turn the remote
				controller POWER button ON and check as
				follows.
					Remote controller	Sub remote controller	Malfunction
				1	Operating Display	E0 Display	Malfunction of
							indoor Unit
				2	Operating Display	Operating Display	Malfunction of
							Remote controller
				3	No Display	E0 Display	Malfunction of
							indoor Unit and
							Remote Controller
				4	No Display	Operating Display	Malfunction of
							Remote controller
When remote controller	1)	Short circuit of indoor/outdoor connect-	1), 2) Check the wire
POWER button is turned		ing wire	3) Turn the circuit breaker OFF, and then turn ON.
ON, operating display	2)	Short circuit of transmission wire.	If the remote controller remains abnormal,
appears, but disappears	3)	Wrong operation of remote controller	despite the above measures, replace the indoor
soon.		due to noise wave emitted by other	controller board.
		appliances.
Despite turning POWER	1)	Damaged remote controller.	1) Measure the voltage between terminals of
button ON, the remote	2)	Short circuit of transmission wire.	remote controller. If no voltage, remove the ter-
controller display does not	3)	Bad contact of indoor CN40.	minals and measure the voltage between
appear.	4) CN40 is attached to a sub unit.		wires. If the voltage is between 6VDC and 12V,
	5)	Damaged power board.	replace the remote controller.
	6)	Bad contact of CN2D.	2) ~ 8) Check each point.
	7)	Blown fuse.			If it is not defective, replace the indoor
	8)	Circuit breaker OFF.			controller board.

OC194-36