![](/images/new-backgrounds/1251110/25111049x1.webp)
SECTION VI – TROUBLE SHOOTING
TROUBLE | PROBABLE CAUSE | REMEDY |
a.Excessive load. | a.Reduce loading to rated load of hoist as shown on | |
But Not Raise. |
| nameplate. |
| b.Hoist electrical circuit open. | b.Check for loose connections. See that necessary |
|
| jumper wires are properly installed on contactor. |
| c. Contactor assembly not | c. See that necessary jumper wires are properly |
| functioning. | installed. Verify that the contactor armatures are |
|
| free to move. If binding occurs, replace contactor. |
|
| Check for burned out contactor coils. |
| d.Up, down button inoperative. | d.Check push button contacts and wires. |
a.Low voltage. | a.See that the power supply current is the same | |
Lift Rated Load. |
| voltage listed on motor data plate. Check hoist |
|
| motor connections. Check size of power supply |
|
| lines. |
a.Excessive load. | a.Reduce loading to rated load as shown on | |
Overheats. |
| nameplate. |
| b.Excessive | b.Reduce frequency of lifts or amount of jogging. |
| c. Wrong voltage or frequency. | c. Check current rating on motor data plate against |
|
| power supply. Check hoist and inspect for |
|
| defective, worn or damaged parts. |
| d.Defective motor or worn | d.Disassemble hoist and inspect for defective, worn |
| bearings in hoist frame. | or damaged parts. |
| e.Brake not adjusted correctly. | e.Adjust brake per Section VII, Paragraph |
a.Excessive Load. | a.Reduce loading to rated load as shown on | |
Excessively |
| nameplate. |
When Hoist is |
|
|
Stopped. | b.Motor brake not holding. | b. With No Load, check hoist for drift. If drifting is |
|
| excessive, inspect motor brake (Section V, |
|
| Paragraph |
|
| VII, Paragraph |
a.Collectors make poor contact. | a.Check collectors for free movement of spring arm, | |
Intermittently. |
| weak spring or electrical connections. |
| b.Loose connections. | b.Check all wiring for loose connections. |
|
|
|
SECTION VII – ADJUSTMENTS
Refer to Figure
WARNING
Check to be certain main power switch is locked in open position (OFF) before removing brake cover.
25