Troubleshooting - Truper MOE-2A Manual

Troubleshooting

Problem Cause
The engine takes a • Defective bearings.
long time to • Defective capacitor.
accelerate.
• Faulty stationary switch.
• Voltage too low.
Motor does not start • The fan guard is bent and in contact with
after initial the fan.
installation. • The motor is damaged and the rotor is
hitting the stator.
• The motor has bad wiring.
The shaft rotates in • Wiring configured to rotate in the
the opposite opposite direction.
direction.
• Ambient temperature too high.
The overload
protector trips • The winding is shorted or grounded.
continuously.
• Protector may be defective.
• Excessive load.
Engine has been • The motor or its capacitor may have
running and then will failed.
not start.
• The stator is shorted or has gone to
ground. The motor will hum and the circuit
breaker or fuse will trip.
• The starter switch has failed.
• The fuse or circuit breaker has tripped.
• Motor overloaded or load stuck.
Solution
• The bearing must be replaced.
• Refer to a
Center for repair.
• Inspect and repair the switch contacts and connections.
• Make sure the voltage is within 10% of the motor
rating. If not, contact the power company or check to see
if other equipment is drawing power away from the
motor.
• Refer to a
Center for repair.
• Check that the motor is correctly wired according to the
information supplied with the motor.
• Rewire the motor according to the configuration
diagram on page 8.
• Check that the motor receives sufficient air for proper
cooling. The motor is designed to operate below 104 °F
Note: A properly running motor may be hot to the touch.
• Inspect the stator for defects or loose or cut wires that
may cause it to ground.
• Refer to a
Center for repair.
• Verify that the load is not jammed. If the motor is a
a replacement, verify that the rating is the same as the
old motor. If the old motor was a special design, a stock
motor may not be able to match the performance.
Remove the load from the motor and inspect the
amperage draw of the motor under load. It should be
less than the full load rating stamped on the nameplate.
• First discharge the capacitor. To check the capacitor, set
the voltmeter to the RX100 scale and touch its probes to
the capacitor terminals. If the capacitor is OK, the needle
will jump to zero ohms and back up again. A steady zero
ohms indicates a short circuit; a steady high ohm
indicates an open circuit.
• Disassemble the motor and inspect the winding and
internal connections. A burned stator will show a burn
mark. The motor must be replaced or the stator
rewound.
• Disassemble the motor and inspect the centrifugal and
stationary switches. The centrifugal switch weights should
move freely in and out. Make sure the switch is not loose
on the shaft. Inspect the contacts and connections of the
stationary switch. Replace the switch if the contacts are
burned or pitted
• Replace the fuse or reset the circuit breaker.
• Inspect to see that the load is free. Check motor amp
draw against nameplate rating.
Authorized Service
Authorized Service
Authorized Service
9
ENGLISH