How To Check Simply The Main Parts - Toshiba RAS-M10SMUV-E Service Manual

11-6. How to Check Simply the Main Parts

11-6-1. How to Check the P.C. Board (Indoor Unit)
(1) Operating precautions
1) When removing the electric parts box or the P .C. board, be sure to shut off the power supply breaker.
2) When removing the P .C. board, hold the edge of the P.C. board and do not apply force to the parts.
3) When connecting or disconnecting the connectors on the P .C. board, hold the whole housing.
Do not pull at the lead wire.
(2) Inspection procedures
1) When the P .C. board is judged to be defective, check for disconnection, burning, or discoloration of the
copper foil pattern or this P .C. board.
2) The P .C. board consists of the following 2 parts
a. Main P.C. board part :
DC power supply circuit (5V, 12V), Indoor fan motor control circuit, CPU and peripheral circuits,
buzzer, and Driving circuit of top/ bottom louver.
b. Indication unit of infrared ray receiving infrared ray receiving circuit, LED :
11-6-2. Sensor characteristic table
TA : Room temp. sensor
TC : Heat exchanger temp. sensor
TCJ : Heat exchanger temp. sensor
11-6-3. Indoor Unit (Other Parts)
No. Part name
1 Room temp. (TA) sensor
Heat exchanger (TC, TCJ)
sensor
2 Remote controller
3 Louver motor
MP24Z
4 Indoor fan motor
(Model : SWF-230-60-1R)
Tel: 01823 665660
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50
40
30
20
10
0
Disconnect the connector and measure the resistance value with tester.
(Normal temp.)
Temperature
Sensor
TA, TC, TCJ (kΩ)
Refer to 11-4-1.
Measure the resistance value of each winding coil by using the tester.
(Under normal temp. 25°C)
White
1 1
Yellow
2 2
Yellow
3 3
Yellow 4 4
Yellow
5 5
Measure the resistance value of each winding by using the tester.
Red
White
– 70 –
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TA, TC, TCJ
0 10 20 30 40
Temperature (˚C)
Checking procedure
10°C 20°C
20.7 12.6
Position
1 to 2
1 to 3
1 to 4
1 to 5
Position
Red - White
White - Black
Black - Red
Black
50
25°C 30°C 40°C
10.0 7.9 4.5
Resistance value
380 ± 40Ω
Resistance value
70 to 100Ω
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