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6-2
Chapter 6 | Troubleshooting
Troubleshooting Table
(continued)
PROBLEM
POTENTIAL CAUSE
CORRECTIVE ACTION
Buttons not
functioning on
control panel.
Fuse(s) are blown.
Disconnect the power. Remove the fascia and the
body. Check if one of the two fuses on the circuit
board (PCB) are blown. Replace fuse(s).
Key pad not connected
firmly.
Once the fascia is removed, check if key pad is
plugged in and fully seated. If seated, replace key
pad.
PCB is not functioning.
Apply the power directly to the motor. If the motor spins,
the PCB is not functioning. Replace the PCB. Perform
a hipot test and current leakage test after replacing the
PCB or the motor.
Motor not
spinning.
Fuse(s) are blown.
Disconnect the power. Remove the fascia and the
body. Check if one of the two fuses on the circuit
board (PCB) are blown. Replace fuse(s).
PCB is not functioning.
Apply the power directly to the motor. If the motor spins,
the PCB is not functioning. Replace the PCB. Perform
a hipot test and current leakage test after replacing the
PCB or the motor.
Motor not functioning.
Apply the power directly to the motor. If the the motor
does not spin, then replace motor. Perform a hipot
test after replacing motor.
Motor has stopped after
being used for several
hours.
Check the breather filter, the motors internal thermal
fuse may have tripped.
Check for any obstruction that may limit air flow.
If the breather is clogged replace and allow at least
30 minutes for the motor to cool down and reset the
thermal fuse.
If the aforementioned does not solve the motor
shutting down, then replace the motor. Perform a
hipot test after replacing motor.
