Toshiba RAS-B10SKVP-E Block distinction, Judgment and action, Air Block Cause of operation

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
						Judgment and action
Check		Check		Air
	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)
			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
			(TCJ 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 not	Operation	Flashes when	1. When the outdoor unit never
	cable and		sent to indoor side from	continues.	trouble is detected	operate:
	serial signal		operation started.		on Return serial	1) Check connecting cable, and
			1) Defective wiring of		signal, and normal
						correct if defective wiring.
					status when signal
			connecting cable			2) Check 25A fuse of inverter
					is reset.
			2) Operation of compres-
						P.C. board.
			sor thermo Gas			3) Check 3.15A of inverter P.C.
			shortage Gas 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.

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