Toshiba RAS-B13SKVP-E, RAS-B10SKVP-E 84, Check procedures, Procedure, Check points, Causes

(3) Check procedures

Table 11-9-1

No.	Procedure			Check points				Causes
1	Turn off the power supply breaker	Check whether or not the fuse (F01)					Impulse voltage was applied or the
	and remove the P.C. board	is blown.					indoor fan motor short-circuited.
	assembly from electronic parts
	base. Remove the connecting
	cables from the terminal block.
2	Remove the connector of the	Check power supply voltage :					1.	The terminal block or the crossover
	motor and turn on the power	1.	Between No. 1 and No. 3 of CN01					cable is connected wrongly.
	supply breaker. If OPERATION		(AC 220–240V)				2.	The capacitor (C01), line filter (L01),
	indicator flashes (once per	2.	Between		and	of C03		resistor (R02), or the diode (DB01)
	second), it is not necessary to
			(DC 310–340V)					is defective.
	check steps (1 to 3) in the right	3.	Between		of C124 and output		3.	IC11, IC13 and T101 are defective.
	next column.
			side of IC13 (DC 15V)				4.	IC11, IC13 and T101 are defective.
		4.	Between 12V and GND				5.	IC11, IC13, IC14 and T101 are
		5.	Between 5V and GND					defective.
3	Push [START/STOP] button once	Check power supply voltage :					IC51 and IC52 are defective.
	to start the unit. (Do not set the	1.	Between CN51 and
	mode to On-Timer operation.)		No. 1 of CN01 (DC 15–60V)
4	Shorten the restart delay timer	Check whether or not all indicators					The indicators are defective or the
	and start unit.	(OPERATION, TIMER, FILTER,					housing assembly (CN21) is defective.
		PURE) are lit for 3 seconds and they
		return to normal 3 seconds later.
5	Push [START/STOP] button once	1.	Check whether or not the com-				1.	The temperature of the indoor heat
	to start the unit,		pressor operates.					exchanger is extremely low.
	• Shorten the restart delay timer.	2.	Check whether or not the OP-				2.	The connection of the heat ex-
	• Set the operation mode to		ERATION indicator flashes.					changer sensor is loose.
	COOL.							(The connector is disconnected.)
	• Set the fan speed level to AUTO.							(CN62)
							3.	The heat exchanger sensor and the
	• Set the preset temperature
								P.C. board are defective.
	much lower than the room
								(Refer to Table 11-4-1.)
	temperature. (The unit (com-
							4.	The main P.C. board is defective.
	pressor) operates continuously
	in the above condition.)
6	If the above condition (No. 5) still	1.	Check whether or not the com-				1.	The temperature of the indoor heat
	continues, start the unit in the		pressor operates.					exchanger is extremely high.
	following condition.	2.	Check whether or not the OP-				2.	The connection of the heat ex-
	• Set the operation mode to		ERATION indicator flashes.					changer sensor short-circuited.
	HEAT.							(CN62)
	• Set the preset temperature						3.	The heat exchanger sensor and the
	much higher than room tem-							P.C. board are defective.
	perature.							(Refer to Table 11-4-1.)
							4.	The main P.C. board is defective
7	Connect the motor connector to	1.	Check it is impossible to detect				1.	The indoor fan motor is defective.
	the motor and turn on the power		the voltage (DC 15V) between 3					(Protected operation of P.C. board.)
	supply.		and 4 of the motor terminals.				2.	The P.C. board is defective.
	Start the unit the following	2.	The motor does not operate or the				3.	The connection of the motor
	condition.		fan motor does not rotate with					connector is loose.
	• Set the fan speed level to HIGH.		high speed.
	(The unit (compressor) operates		(But it is possible to receive the
	continuously in the above		signal from the remote controller.)
	condition in No. 5.)	3.	The motor rotates but vibrates
			strongly.

– 84 –