CM LODESTAR 635 Serie Manuel D'entretien, D'opération Et De Pièces page 23

TABLE 7. TROUBLESHOOTING CHART (CONTINUED)
Symptom
8.) Motor overheats
9.) Hook fails to stop at either or both
ends of travel.
10.) Hook stopping point varies.
11.) Hoist will not operate at slow speed
in either direction.
12.) Hoist will not operate at fast speed
in either direction.
13.) Hook will not raise at slow speed.
14.) Hook will not lower at slow speed.
15.) Hook will not raise at fast speed.
16.) Hook will not lower at fast speed.
17.) Hook moves in proper direction at
one speedwrong direction at other
speed.
Possible Cause(s)
A.) Excessive load.
B.) Low voltage.
C.) Extreme external heating.
D.) Frequent starting or reversing.
E.) Phase failure or unbalanced current in the phase
(three phase unit only).
F.) Brake dragging.
G.) 115-1-60 Units: Solid state reverse switch exposed to
excessive temperature or the switch is damaged.
A.) Limit switches not opening circuits.
B.) Shaft not rotating.
C.) Traveling nuts not moving along shaft guide plate loose; shaft or
nut threads damaged.
A.) Limit switch not holding adjustment.
B.) Brake not holding.
TWO SPEED HOIST
A.) Open Circuit.
B.) Phase Failure.
A.) Open Circuit.
B.) Open speed selecting circuit.
C.) Phase Failure.
A.) Excessive load.
B.) Phase Failure.
C.) Open Circuit.
D.) Brake not releasing.
A.) Phase Failure.
B.) Open Circuit.
C.) Brake not releasing.
A.) Excessive load.
B.) Phase Failure.
C.) Brake not releasing.
A.) Phase Failure.
B.) Brake not releasing.
A.) Phase reversal.
(ENGLISH)
A.) See item 1H.
B.) Correct low voltage condition as described on page 9.
C.) Above an ambient temperature of 40°C. (104°F.),
the frequency of hoist operation must be limited
to avoid overheating of motor. Special provisions
should be made to ventilate the space or shield
the hoist from radiation.
D.) Avoid excessive inching, jogging or plugging. This
type of operation drastically shortens the motor and
contactor life and causes excessive brake wear.
E.) See item 1B.
F.) Check brake adjustment as described on page 16.
G.) See page 15.
A.) Check switch connections, electrical continuity
and mechanical operation. Check the switch
adjustment as described on pages 16 & 17.
Check for a pinched wire.
B.) Check for damaged gears.
C.) Tighten guide plate screws. Replace damaged part.
A.) See item 9.
B.) Check the brake adjustment as described on page 16.
A.) Open or shorted motor winding, loose or broken
wire in circuit, speed selecting contactor stuck in
opposite speed mode. Replace motor, repair wire
and/or replace speed selecting contactor.
B.) See item 1B.
A.) See Item 11A.
B.) Open or shorted winding in speed selecting
contactor coil. Loose connection or broken
wire in circuit. Mechanical binding in contactor.
Control station contacts not making or opening.
Replace speed selector; repair connection, replace
contactor or control station.
C.) See Item 1B.
A.) See item 1H.
B.) See Item 1B.
C.) See item 11A.
D.) See Item 1G.
A.) See item 1B.
B.) See item 11A.
C.) See Item 1G.
A.) See item 1H.
B.) See Item 1B.
C.) See Item 1G.
A.) See Item 1B.
B.) See Item 1G.
A.) Wiring reconnected improperly. Interchange two
leads of motor winding that is out
21
Corrective Action
P/N: 83874 (REV. 627-T) September 2016