Use and Care Manual

Service Manual
26
Commercial Disposers
Problem Cause Solution
Motor hums but does not run; water runs. Jammed rotating shredder.
Stator/lower end frame/upper
end bell misaligned (thru bolts
loose, bent, or broken.
See previous “Jammed rotating shredder” solution.
Remove and realign sections. Ensure thru bolts are
not bent or broken. Replace bolts if necessary.
Rotor shaft binding against
stator core.
Check inside diameter of stator core and outside di-
ameter of rotor shaft core for score marks and replace
stator or rotor shaft if necessary. See “Stator” on page
20 or “Lower End Frame (LEF)” on page 19.
Check for worn bearings and replace if necessary.
See “Repairing Upper End Bell Assembly” on page 13.
Start switch inoperative
(1 Phase only).
Replace start switch. See “Replacing Start Switch
(1 Phase Models)” on page 19.
Stator windings open. Test stator windings and replace stator if open. See
“Stator” on page 20.
Check for water leaks and repair as necessary.
Weak capacitor charge
(1 Phase only).
Test capacitor and replace if necessary. See “Testing
Capacitor” on page 17.
Improper voltage to disposer. Test power supply for proper voltage and phase, and
correct if necessary.
Incorrect wiring at motor and/
or starting switch or solenoid
valve.
Refer to the appropriate wiring diagram.
Disposer runs briey, then trips overload
protector.
Centrifugal actuator stuck open
or closed, or actuator spring is
loose (1 Phase only).
Inspect centrifugal actuator. Replace rotor assembly.
Start switch contacts arced
(1 Phase only).
Replace start switch. See “Replacing Start Switch
(1 Phase Models)” on page 19.
Stator windings shorted. Test stator windings and replace stator if open. See
“Stator” on page 20.
Check for water leaks and repair as necessary.
Water in stator. Inspect and x water leak. See Water in Stator in this
section.
Disposer jammed. See previous “Jammed Rotating Shredder” solution.
Improper power supply. Electrical supply must be connected by an electrician.
Improper wiring connection. See applicable wiring diagram and reconnect wiring.
Electrical supply line over-
loaded.
Connect disposer to another circuit. Disposer should
only be on appliance circuit.
Faulty or improperly connected
overload protector.
See applicable wiring diagram for correct connections
and/or replace overload if necessary. See “Overload
Protector” on page 16.
Disposer runs slow and/or stops when
food waste is inserted.
Low voltage power supply
connected to high voltage sta-
tor connections.
See applicable wiring diagram and reconnect motor
leads for corresponding voltage.