Toshiba RAS-M10PKVP-E Service Manual page 92

No. Part name
4 Outdoor temperature sensor (TO),
discharge temperature sensor
(TD), suction temperature sensor
(TS), outdoor heat exchanger
temperature sensor (TE), A
room gas side temperature
sensor (TGa), B room gas side
temperature sensor (TGb)
5 4-way valve coil
(Model :STF)
6 Pulse motor valve coil
(Model : CAM-MD12TF-12)
11-10-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For boost, smoothing)
2 Diode block
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Sensor
TGa, TGb (Cooling only)
TO, TE, TS (k )
TGa, TGb (Heat Pump) (k )
Measure the resistance value of winding by using the tester.
Measure the resistance value of winding by using the tester.
1
COM 6
3
1. Turn OFF the power supply breaker.
2. Discharge all three capacitors completely.
3. Check that safety valve at the bottom of capacitor is not broken.
4. Check that vessel is not swollen or exploded.
5. Check that electrolytic liquid does not blow off.
6. Check that the normal charging characteristics are shown in continuity test by the
tester.
C12 C13 C14
C12, C13, C14 760μF/400V
1. Turn OFF the power supply breaker.
2. Completely discharge the four electrolytic capacitors.
3. Remove the diode block from the PCB (which is soldered in place).
4. Use a multimeter with a pointer to test the continuity, and check that the diode block
has the proper rectifi cation characteristics.
+
1
~ ~
3 2
–
4
– 92 –
Checking procedure
Temperature
10°C
TD (k ) 100
20.6
20.5
W
R
O
White - Orange
Y BL
2 4
Checking procedure
Pointer swings once, and returns slowly.
When performing test once again under
MCC-5009
Soldered
another polarity, the pointer should return.
surface
Tester rod
~
~ ~
+ –
~
1 2 3 4
–
(DBO1)
10 to 20 when the multimeter probe is reversed
20°C 25°C 30°C
64 41 27
12.6 10.0 5.1
12.5 10.0 5.3
Resistance value
1435 ± 144
Under 20°C
Position Resistance value
Red - White
42 to 50
Red - Yelloow
Red - Blue
Under 20°C
Case that product is good
Resistance value
+ – in good product
2 +
1
∞
3
~
2
4 ~
3
40°C
18
3.4
3.6