Service manual

AMERICAN DISH SERVICE

TECHNICAL SUPPORT MATERIAL

Routine and Preventative Maintenance

Motor Failure

Items to inspect to determine the cause of a motor failure:

 The size wire feeding the machine, are there different sizes used in the distance to

the machine.

 Size breaker for the machine, will it cycle on and off. Is it a new breaker.

 Is it a clean circuit, no other machines, lights, or motors on this dishmachine circuit.

 Condition of the wire, are all the strands used, are they clean, bright, tight.

 What is the actual voltage under load. Does it vary during the work period. 98 volts

would be an operational problem, 102 volts would cause premature failures for a

120v motor.

 Are the ﬂ ag wire connectors tight on the spades of the motor itself. Is the “crimp” on

the copper or the plastic or partial.

 When it goes “out” did it just stop, does it hum, does it try to turn, will it run

momentarily.

 Can you smell burning insulation--hot plastic smell

The answers to these questions are pathways to determining causes for failure. A motor

is a electro-mechanical machine, a failure can be the result of part failure, part damage,

improper assembly, improper power supply, compromised supply devices, improper

connections to power, poor quality or corrupted power (such as hot summer days in large

cities).

Rule for Motors—Sound motor/pump, clean adequate voltage, correct wires, sound

switches and contactors, tight connections, with these 5 elements the motor is going to

move as rated. If the motor does not move, the problem will be found in one or more of the

5 elements above.

--Russell Payzant