Toshiba RAS-13UAV-E2, RAS-13UKV-E2 Check procedures Procedure Check points Symptom Causes

					FILE NO. SVM-03008
(3) Check procedures
			Table 10-8-1
No.	Procedure		Check points (Symptom)		Causes
1	Turn off the power supply and	Check whether or not the fuse (F01)		Impulse voltage was applied or the
	remove the P.C. board assembly	is blown.		indoor fan motor short-circuited.
	from electronic parts base. Remove
	the connecting cables from the
	terminal block.
2	Remove the connector of the motor	Check power supply voltage :		1. The terminal block or the cross-
	and turn on the power supply. If	1.	Between TP2 and TP3		over cable is connected wrongly.
	OPERATION lamp flashes (once		(AC 220-240 V)	2.	The capacitor (C01), line filter
	per second), it is not necessary to	2.	Between e and d (DC 310-340 V)		(L01), resistor (R01), or the diode
	check steps (1 to 3) in the right	3.	Between d of C10 and output side		(DB01) is defective.
	next column.		of IC08 (DC 15 V)	3.	IC01, IC02 and T01 are defective.
		4.	Between 12 V and GND	4.	IC01, IC02 and T01 are defective.
		5. Between 5 V and GND		5.	IC01, IC02, IC07 and T01 are
					defective.
3	Push [START/STOP] button once to	Check power supply voltage :		<Heating and cooling model>
	start the unit. (Do not set the mode	1.	Between CN23 and CN24	IC03 and IC04 are defective.
	to Fan Only or On-Timer operation.)		(DC 15-60 V)
4	Shorten the line of the restart delay	Check whether or not all lamps		The lamps are defective or the
	timer and start unit.	(OPERATION, TIMER, PRE. DEF,		housing assembly (CN13) is
		FILTER and Hi POWER) are		defective.
		indicated for 3 seconds and they
		return to normal 3 seconds later.
5	Push [START/STOP] button once to	1. Check whether or not the		1.	The temperature of the indoor
	start the unit.		compressor operates.		heat exchanger is extremely low.
	• Shorten the time of the restart	2.	Check whether or not the	2.	The connection of the heat
	delay timer.		OPERATION lamp flashes.		exchanger sensor is loose.
	• Set the operation mode to COOL.				(The connector is disconnected.)
	• Set the fan speed level to AUTO.				(CN01)
	• Set the preset temperature much			3.	The heat exchanger sensor and
	lower than the room temperature.				the P.C. board are defective.
	(The unit (compressor) operates				(Refer to Table 10-4-1.)
	continuously in the above			4.	The main P.C. board is defective.
	condition.)
6	If the above condition (No. 5) still	1.	Check whether or not the	1.	The temperature of the indoor
	continues, start the unit in the		compressor operates.		heat exchanger is extremely high.
	following condition.	2.	Check whether or not the OPERA-	2.	The connection of the heat
	• Set the operation mode to HEAT.		TION lamp flashes.		exchanger sensor short-circuited.
	• Set the preset temperature much				(CN01)
	higher than room temperature.			3.	The heat exchanger sensor and
					the P.C. board are defective.
					(Refer to Table 10-4-1.)
				4.	The main P.C. board is defective.
7	Connect the motor connector to the	1.	Check it is impossible to detect the	1.	The indoor fan motor is defective
	motor and turn on the power supply.		voltage (DC 15 V) between 3 and 4		(Protected operation of P.C.
	Start the unit the following condition		of the motor terminals.		board.)
	• Set the operation mode to FAN.	2.	The motor does not operate. (But it	2.	The connection or the motor
	• Set the fan speed level to HIGH.		is possible to receive the signal		connector is loose.
	(The unit (compressor) operates		from the remote control.)	3.	The P.C. board is defective.
	continuously in the above	3.	The motor rotates but vibrates
	condition.)		strongly.

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