Toshiba RAV-SM560XT-E, RAV-SM800XT-E service manual No display in the setting at shipment

Table 10-2-2

		Operation of diagnostic function
							Judgement and action
Block	Check		Symptom	Unit	Condition
	code			status
[MODE]			The serial signal is not output	Operation	Displayed when	1.	Outdoor unit does not completely
[TIMER] lamp			from outdoor unit to indoor unit.	continues.	error is detected		operate.
5Hz flash			• Miscabling of inter-unit cables				• Inter-unit cable check, correction of
			• Defective serial sending circuit				miscabling
			on outdoor P.C. board				• Outdoor P.C. board check, P.C. board
			• Defective serial receiving circuit				cables check
			on outdoor P.C. board				• Compressor case thermo check
			• Compressor case thermo			2.	In normal operation
			operation				When outdoor sending serial LED
							(Green) flashes, the receiving serial
							LED (Orange) also flashes. : Indoor
							P.C. board (Main P.C. board) check
							When the receiving serial LED (Orange)
							does not flash: Outdoor P.C. board
							check
			BUS communication circuit error	Operation	Displayed when	1.	Communication line check, miscabling
			* BUS communication was	continues	error is detected		check
			interrupted over the specified	(According			Power supply check for central control
			time.	to remote			(Central control remote control, etc.)
				control of			and indoor unit
				indoor		2.	Communication check (XY terminal)
				unit)		3.	Indoor P.C. board check
						4.	Central control check
							(Communication P.C. board)
			Error in 4-way valve system	Operation	Displayed when	1.	Check 4-way valve.
			• Indoor heat exchanger	continues.	error is detected	2.	Check 2-way valve and non-return
			temperature rise after start of				valve.
			cooling operation.			3.	Check indoor heat exchanger sensor
			• Indoor heat exchanger				(TC).
			temperature fall after start of			4.	Check indoor P.C. board
			heating operation.				(Main P.C. board).
			Error in other cycles	Operation	Displayed when	1.	Compressor case thermo operation.
			• Indoor heat exchanger temp	continues.	error is detected	2.	Coming-off of detection part of indoor
			(TC) does not vary after start of				heat exchanger sensor.
	*		cooling/ heating operation.			3.	Check indoor heat exchanger sensor
						4.	(TC).
							Check indoor P.C. board
							(Main P.C. board).
[MODE] lamp			Coming-off, disconnection or	Operation	Displayed when	1.	Check indoor temp sensor (TA).
5Hz flash			short of indoor temp sensor (TA)	continues.	error is detected	2.	Check indoor P.C. board
							(Main P.C. board).
			Coming-off, disconnection or	Operation	Displayed when	1.	Check indoor temp sensor (TC).
			short of indoor temp sensor (TC)	continues.	error is detected	2.	Check indoor P.C. board
							(Main P.C. board).
			Coming-off, disconnection or	Operation	Displayed when	1.	Check indoor temp sensor (TCJ).
			short of indoor temp sensor	continues.	error is detected	2.	Check indoor P.C. board (Main P.C.
			(TCJ)				board).
[MODE] lamp			Error in indoor fan system	All stop	Displayed when	1.	Check indoor fan motor connector
5Hz flash			Revolutions frequency error of fan		error is detected		circuit (CN210).
						2.	Check indoor fan.
						3.	Check indoor P.C. board
							(Main P.C. board).
			Error in indoor unit or other	Operation	Displayed when	1.	Check indoor P.C. board
			positions	continues.	error is detected		(EEPROM and peripheral circuits)
			1. EEPROM access error				(Main P.C. board).
			Outside error input	Operation	Displayed when	1.	Check outside devices.
			Detected by input voltage level	continues.	error is detected	2.	Check indoor P.C. board
			from outside devices				(Main P.C. board).
			Outside interlock input	All stop	Displayed when
			Detected by input voltage level		error is detected
			from outside devices

*: No display in the setting at shipment

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