How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad - Toshiba RAS-M22SKV-E Service Manual

11-8-3. Indoor Unit (Other Parts)
No. Part name
1 Room temp. (TA) sensor
Heat exchanger (TC) sensor
2 Remote controller
3 Louver motor
MP24Z3T
4 Indoor fan motor
11-8-4. Outdoor Unit
Refer to SERVICE MANUAL of connected outdoor unit.
11-8-5. Checking Method for Each Part
No. Part name
1 Electrolytic capacitor
(For boost, smoothing)
2 Diode block

11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

Refer to SERVICE MANUAL of connected outdoor unit.
Disconnect the connector and measure the resistance value with tester.
(Normal temp.)
Temperature
Sensor
TA, TC (kΩ)
Refer to 11-5-1. (5).
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
Refer to 11-5-1. (3) and (4).
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 → 18SAV-E: 500µF/400V, 22SAV-E: 760µF/400V
1. Turn OFF the power supply breaker.
2. Completely discharge the four electrolytic capacitors.
3. Remove the diode block from the P.C. board (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
– 66 –
Checking procedure
10°C 20°C
20.7 12.6
Position
1 to 2
1 to 3
1 to 4
1 to 5
Checking procedure
Case that product is good
Pointer swings once, and returns slowly.
When performing test once again under
another polarity, the pointer should return.
MCC-5009
Soldered
surface
Tester rod
+
~
2
~ ~
–
~
3
4
–
4
(DBO1)
10 to 20 Ω when the multimeter probe is
reversed
25°C 30°C 40°C
10.0 7.9 4.5
Resistance value
250 ± 20Ω
Resistance value
in good product
–
+
1
∞
~
2
~
3