Toshiba RAS-M16EKCVP-E 84, Block distinction, Operation of diagnosis function, 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.		Current-detect circuit	All off	Displayed when	Even if trying operation again, all
	board		error		error is detected.	operations stop immediately. :
						Replace P.C. board.
			Being out of place,	All off	Displayed when	Check 5-serial LED.
			disconnection or short-		error is detected.	1.	Check outdoor temp. sensors
			circuit of outdoor temp.				(TE, TS).
			sensor (Ts)			2.	Check P.C. board.
			Disconnection or short-	All off	Displayed when	1.	Check discharge temp. sensor
			circuit of discharge		error is detected.		(TD).
			temp. sensor			2.	Check P.C. board
			Outdoor fan drive	All off	Displayed when	Position-detect error, over-current
			system error		error is detected.	protective operation of outdoor fan
						drive system, fan lock, etc. :
						Replace P.C. board or fan motor.
	Not		Outdoor temp. sensor	Operation		1.	Check outdoor temp. sensor
	displayed		error	continues	——		(TO).
						2.	Check P.C. board.
	Outdoor P.C.		Compressor drive	All off	Displayed when	Check 5-serial LED.
	board		output error, Compres-		error is detected.	When 20 seconds passed after
			sor error (lock, missing,			start-up, position-detect circuit
			etc.), Break down			error occurred. : Replace
						compressor.
			Error exclusive for	All off	Displayed when	Check 5-serial LED.
			multiple type		error is detacted.	1.	Miswiring of connecting wire of
							A/B rooms in indoor/outdoor
							units
						2.	Check gas leakage.
						3.	Check disconnection of sensor.
						4.	Electronic control valve error
	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
	compres-		operation started, but it		on return serial		minutes. (Code is not displayed
	sor)		is not sent from		signal, and normal		during operation.)
			halfway.		status when signal		Supply gas. (Check also gas
			(1) Compressor thermo.		is reset.		leak).
			operation			2.	Unit operates normally during
			Gas shortage				check.
			Gas leak				If return serial signal does not
			(2) Instantaneous				stop between indoor terminal
			power failure				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 compres-
			(Current protective				sor (Missed phase)
			circuit does not operate
			when a specified time
			passed after compres-
			sor had been acti-
			vated.)
			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).

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