TROUBLE
PROBABLE CAUSE
CHECK AND REMEDY
MOTOR DRIVEN TROLLEY
18) Trolley does not
operate in either
direction.
19) Trolley operates in
one direction only.
20) Trolley operates
sluggishly.
21) Trolley motor
overheats.
A) No voltage at motor.
B) Phase failure.
C) Open control circuit.
D) Low voltage.
E) Wrong voltage or frequency.
A) Open control circuit.
A) Excessive load.
B) Low voltage.
C) Unbalanced current in the phases.
D) Brake dragging.
A) Open circuit, grounded or faulty
connection in hoist wiring.
B) See Item 1B.
C) See Item 1D.
D) See Item 1F.
E) See Item 1E.
A) See Item 1D.
A) See Item 1H.
B) See Item 1F.
C) See Item 1B.
D) Check electrical continuity and
connections. Check that the cor-
rect coil has been installed. The
coil for dual voltage units oper-
ate on 230 volts when the trol-
ley is connected for either 230
or 460 volt operation. Check
brake adjustment as described
on page 17.
A) See Item 8.
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