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Testing the Motor (Figure 17)
If any motor fails the below tests, the motor is defective
and must be replaced.
1.
Using an ohmmeter check the resistance from any
one of the motor connector pins to the aluminum end
plate of the motor. This resistance should be greater
than 100k ohms.
2.
Check the resistances between each of the three motor
connector pins. These should all read approximately
the same resistance within an ohm.
3.
Check to see if the blower wheel spins freely.
Figure 17. Motor Test
Scale
Measurement Range in Words
ohms
2 M
two megohms - two million ohms
0 - 2,000,000
200 K
two hundred kil-ohms -
two hundred thousand ohms
0 - 200,000
20 K
twenty kilo-ohms -
twenty thousand ohms
0 - 20,000
2 K
two kilo-ohms -
two-thousand ohms
0 - 2,000
200
two hundred ohms
0 - 200
Figure 18. Drip Loop
Back of Control
Module
Drip Loop
Connector
Orientation
Between 4 and 8
O’clock
