Toshiba RAS-10SAVP-E, RAS-B13SKVP-E, RAS-B10SKVP-E service manual Block Cause of operation

Block distinction Operation of diagnosis function

Check		Check		Air			Judgment and action
	Block		Cause of operation	conditioner	Remarks
code		code
				status
	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, position-
			between windings of				detect circuit error occurred. :
			compressor				Replace P.C. board.
						2.	Measure resistance between
							wires of compressor, and
							perform short-circuit. :
							Replace compressor.
			Current-detect circuit	All off	Displayed when	Even if trying operation again, all
			error		error is detected.	operations stop immediately. :
						Replace P.C. board.
			Being out of place,	All off	Displayed when	1.	Check sensors (TE, TS).
			disconnection or short-		error is detected.	2.	Check P.C. board.
			circuit of the outdoor
			heat exchanger sensor
			(TE) or suction temp.
			sensor (Ts)
			Disconnection or short-	All off	Displayed when	1.	Check discharge temp. sensor
			circuit of discharge temp.		error is detected.		(TD).
			sensor			2.	Check P.C. board
			Outdoor fan drive system	All off	Displayed when	Position-detect error, over-current
			error		error is detected.	protective operation of outdoor fan
						drive system, fan lock, etc. :
						Replace P.C. board or fan motor.
	Not		Being out of place,	Operation		1.	Check outdoor temp. sensor
	displayed		disconnection or short-	continues	——		(TO).
			circuit of the outdoor			2.	Check P.C. board.
			temp. sensor (TO)
	Outdoor P.C.		Compressor drive output	All off	Displayed when	When 20 seconds passed after
	board		error, Compressor error		error is detected.	start-up, position-detect circuit error
			(lock, missing, etc.),			occurred. : Replace compressor.
			Break down			Trouble on P.M.V.
	Others		Return serial signal has	Operation	Flashes when	1.	Repeat Start and Stop with
	(including		been sent when	continues	trouble is detected		interval of approx. 10 to 40
	compressor)		operation started, but it		on return serial		minutes. (Code is not displayed
			is not sent from halfway.		signal, and normal		during operation.)
			1) Compressor thermo.		status when signal		Supply gas.
			operation		is reset.		(Check also gas leak).
			Gas shortage			2.	Unit operates normally during
			Gas leak				check.
			2) Instantaneous power				If return serial signal does not
			failure				stop between indoor terminal
							block 2 and 3, replace inverter
							P.C. board.
							If signal stops between indoor
							terminal block 2 and 3, replace
							indoor P.C. board.
			Compressor does not	All off	Displayed when	1.	Trouble on compressor
			rotate.		error is detected.	2.	Trouble on wiring of compressor
			(Current protective				(Missed phase)
			circuit does not operate
			when a specified time
			passed after compressor
			had been activated.)
			Discharge temp.	All off	Displayed when	1.	Check dischage temp. sensor
			exceeded 117°C		error is detected.		(TD).
						2.	Gas leakage
						3.	Trouble on P.M.V.
			Break down of	All off	Displayed when	1.	Check power voltage.
			compressor		error is detected.		(220–230–240 V +10%)
						2.	Overload operation of refrigera-
							tion cycle
							Check installation condition
							(Short-circuit of outdoor diffuser).
			4-way valve inverse error	Operation		1.	Check 4-way valve operation.
			(TC sensor value	continues	——
			lowered during heating
			operation.)

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