Increase Quality Through Interaction with the Field
c. With the Red meter probe in contact with the Red conductor of
the connector and the Black probe in contact with the White
conductor, plug in the power cord: 12VDC should be present as
shown (11.89 VDC) whether the unit is turned on or not.
d. No 12VDC – Replace Power Supply.
e. Both voltages present. Go to 7.
7. Control Board – The control board is difficult to check by itself but by
the process of elimination if all else works then it falls to the control
board as the defective part.
Everything Works But The Motor
Motor connector not plugged into the control board - visual
Motor rotor locked – visual
Motor burned out – visual
Motor Defective – loose wires/worn brushes – continuity –
should be continuity through the motor
Control Board Defective – 110-120VAC should be at the
motor connection when the unit is turned on.
Increase Quality Through Interaction with the Field
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