Toshiba RAS-M14EACV-E, RAS-M13EKCVP-E, RAS-M18EACV-E, RAS-M16EKCVP-E Caution at Servicing, 83

11-4-2. Caution at Servicing

(1)After servicing, push the START/STOP button to return to the normal mode.

(2)After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status. However, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.

(3)After servicing, push [CLR] button under check mode status and then send the check code “7F” to the indoor unit. The error code stored in memory is cleared.

Table 11-4-1

Block distinction			Operation of diagnosis function
Check		Check		Air		Judgment and action
	Block		Cause of operation	conditioner	Remarks
code		code
				status
	Indoor P.C.		Short-circuit or discon-	Operation	Displayed when	1. Check the room temp. sensor.
	board etc.		nection of the room	continues.	error is detected.	2. When the room temp. sensor is
			temperature sensor
						normal, check P.C. board.
			(TA sensor).
			Being out of place,	Operation	Displayed when	1. Check heat exchanger sensor.
			disconnection, short-	continues.	error is detected.	2. When heat exchanger sensor is
			circuit, or migration of
						normal, check P.C. board.
			heat exchanger sensor
			(TC sensor)
			Lock of indoor fan or	All off	Displayed when	1. Check the motor.
			trouble on the indoor fan		error is detected.	2. When the motor is normal,
			circuit
						check P.C. board.
	Not		Trouble on other indoor	Operation	Displayed when	Replace P.C. board.
	displayed		P.C. boards	continues.	error is detected.
	Connecting		Return serial signal is	Operation	Flashes when	1. When the outdoor unit never
	cable and		not sent to indoor side	continues.	trouble is detected	operate:
	serial signal		from operation started.		on Return serial	(1) Check connecting cable,
					signal, and normal
			(1) Defective wiring of			and correct if defective
					status when signal
			connecting cable			wiring.
					is reset.
			(2) Operation of			(2) Check 25A fuse of inverter
			compressor thermo.			P.C. board.
			Gas shortage Gas			(3) Check 3.15A of inverter P.C.
			leak
						board.
						2. To display [Other] block during
						operation, check compressor
						thermo. operation and supply
						gas (check gas leak also).
						3. Unit operates normally during
						check.
						If Return serial signal does not
						stop between indoor terminal
						board 2 and 3, replace inverter
						P.C. board.
						If signal stops between indoor
						terminal board 2 and 3, replace
						indoor P.C. board.
	Outdoor P.C.		Inverter over-current	All off	Displayed when	Even if trying operation again, all
	board		protective circuit		error is detected.	operations stop immediately. :
			operates. (Short time)			Replace P.C. board.
			Position-detect circuit	All off	Displayed when	1. Even if connecting lead wire of
			error or short-circuit		error is detected.	compressor is removed,
			between windings of			position-detect circuit error
			compressor			occurred. : Replace P.C. board.
						2. Measure resistance between
						wires of compressor, and
						perform short-circuit. : Replace
						compressor.

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