1.2.3 Running capacitor
1) Earth inspection between terminal and body
As shown in Figure 1, connect a resistor between one side terminal and body of condenser to check for
continuity.
2) Capacity inspection
(1) Remove the lead wire from both terminals of condenser to be checked.
(2) Contact both terminals of lead wire for 2-3 sec., and discharge.
(Be sure to perform to prevent the tester damage before measuring.)
(3) After discharging, contact both terminals of tester with the terminal of condenser to see the dial vibrating
direction of resistor. (See Figure 2.)
There are three kinds of dial vibrating direction in tester, and each vibrating direction and symptom is as
follows.
A: Normal : Dial shakes instantaneously and returns to the original state immediately.
B: Short : Dial remains moved.
C: Capacity consumed up : Dial does not move at all.
1.2.4 Motor fan
1) Power off, remove motor fan, and test independently.
2) Measure the resistance of main coil, sub coil and control coil in motor.
3) Use a good quality of capacitor in testing.
4) Diagnose the following troubles by the independent test, and replace motor.
a) Motor is not started.
b) Motor rotation rises very slowly.
c) Bearing failure : The shaft does not move.
d) Arc occurs in the motor inside.
e) Smoke emits from motor inside.
f) Excessive noise
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