Toshiba RAS-B10GKVP-E Service Manual page 96

No. Part name
5 ROutdoor temperature sensor
(TO), discharge temperature
sensor (TD), suction tempera-
ture sensor (TS), outdoor heat
exchanger temperature
sensor (TE),
A room gas side temperature
sensor (TGa), B room gas
side temerature sensor (TGb)
6 4-way valve coil
(Model :VHV)
7 Pulse motor valve coil
(Model : CAM-MD12TF-6)
11-10-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For boost, smoothing)
2 Diode block
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Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
Temperature
Sensor
TD (kΩ)
TGa, TGb (Cooling only)
TO, TE, TS (kΩ)
TGa, TGb (Heat Pump) (kΩ)
Measure the resistance value of winding by using the tester.
Measure the resistance value of winding by using the tester.
W
1
R
COM 6
O
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 rectification characteristics.
+
1
~ ~
+
3 2
1 2 3
–
4
– 96 –
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Checking procedure
10°C 20°C
100 64
20.6 12.6
20.5 12.5
Position
Red - White
White - Orange
Blown - Yelloow
Blown - Blue
Y BR BL
COM 2 5 4
Checking procedure
Case that product is good
Pointer swings once, and returns
slowly. When performing test
MCC-5009 once again under another
Soldered
polarity, the pointer should return.
surface
Tester rod
+
~
~ ~ 2
–
~
3
4
–
4
(DBO1)
10 to 20 Ω when the multimeter probe is reversed
25°C 30°C 40°C
41 27 18
10.0 5.1 3.4
10.0 5.3 3.6
Resistance value
1435 ± 144 Ω
Under 20°C
Resistance value
42 to 50kΩ
Under 20°C
Resistance value
– in good product
+
1
∞
~
2
~
3
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