High Wall, Heat Pump Type
Service Manual
92
Toshiba
10-11-4.Checking Method for Each Part
4
4-way valve coil (Comp.
cylinder switching)
(Model : VHV-01AZ535B1)
Measure the resistance value of winding by using the tester.
5
Pulse motor valve coil
(Model : C12A-80A)
Measure the resistance value of winding by using the tester.
6
Outdoor temperature sensor
(TO), discharge temperature
sensor (TD), suction
temperature sensor (TS),
outdoor heat exchanger
temperature sensor (TE)
Disconnect the connector, and measure resistance value with the tester.
(Normal temperature)
No.
Part name
Checking procedure
1
Electrolytic capacitor
(For boost, smoothing)
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.
2
Diode block
(DB01, DB02)
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.
No.
Part name
Checking procedure
Resistance value
7.2 ± 0.36
Under 20°C
Connector : Red
COM
COM
2
6
4
Y
W
G BL
1
R
5
O
3
Position
Red - White
Red - Orange
Gray - Yellow
Gray - Blue
Resistance value
46 ± 3
Ω
46 ± 3
Ω
46 ± 3
Ω
46 ± 3
Ω
Under 20°C
Temperature
Sensor
TD (k )
TO,TS,TE (k )
10°C
20°C
25°C
30°C
40°C
50°C
99
62
50
41
27
18
20.4
12.6
10.0
8.0
5.2
3.5
MCC-5070
Soldered
surface
Heat sink IGBT side
C08
C09
C10
Case that product is good
Pointer swings once, and returns
slowly. When performing test
once again under another polarity,
the pointer should return.
C08, C09, C10 500
μ
F/400V
Resistance value
in good product
Tester rod
+
–
~
2
~
3
~
2
~
3
–
4
~
~
~
+
–
~
1
1 2 3 4
4
2
3
+
1
+
–
∞
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 92 Wednesday, March 4, 2009 11:22 AM
