| No. |
Fault |
Reason |
Solution |
| 1 |
Power light
doesn't work.
|
1. Unconnected power;
2. Damaged transformer;
3. Gone bulb.
|
1. Check if power switches of all levels are closed;
2. Change transformer;
3. Change light. |
| 2 |
Motor rings but doesn't rotate. |
1. Lack phase;
2. Phase failure inside motor;
3. Steel rope got stuck inside hoist.
|
1. Check if triphase circuitry is well connected, without virtual connection or breakage, all connector plugs are connected firmly;
2. Change motor;
3. Disassemble the hoist, take steel rope out, and maintain hoist. |
| 3 |
Limit switch doesn't work.
|
1. Contrary phase sequence of power;
2. Damaged limit switch;
3. Bad contact between limit switch and stop catch.
|
1. Correct phase sequence;
2. Change limit switch;
3. Adjust limit switch or stop catch. |
| 4 |
When power-down, motor descends automatically. |
1. Fouled steel rope;
2. Overworn pulley trough;
3. Unserviceable brake of motor. |
1. Remove foul;
2. Change pulley;
3. Adjust intermission of brake friction plate or change motor. |
| 5 |
Go down only |
1. Limit switch failure;
2. Start button failure;
3. Up-running contactor failure. |
1. Change limit switch;
2. Remove fault or change start button;
3. Change contactor. |
| 6 |
hoist can't start. |
1. Unfirm power connector plug;
2. Damaged start button;
3. Broken fuse;
4. Unrestored overheat protective relay;
5. Leakage protector trip;
6. Phase sequence protector act. |
1. Firm power connector plug;
2. Change start button;
3. Change fuse;
4. Press reset button;
5. Remove leakage, re-switch on;
6. Change phase sequence or solve phase lack. |
| 7 |
Start uplift with load, one end of hoist doesn't move. |
1. Power voltage is lower than 340V;
2. Overlong or over-thin power wire;
3. Small stalled torque. |
1. Solve problem of power;
2. Enlarge conduction cross-section of power wire;
3. Change motor. |
| 8 |
hoist doesn't stop after loosening button. |
1 Contact adhesion of contactor inside electric box;
2. Damaged or stuck button. |
1. Repair or change contactor;
2. Change button or remove fault. |
| 9 |
locking rope angle is larger |
1. Fouled steel rope on surface;
2. Overworn wire clamp. |
1. Remove foul;
2.Send clamp back to manufactory for repair. |
| 10 |
locking rope angle is smaller |
1. Improper hole position;
2. Unscrewed screw on lock seat. |
1. Adjust hole position;
2. Tighten screw. |
| 11 |
Safety lock doesn't lock rope. |
l. Lock spring breaks;
2 Too much sludge inside lock. |
1. Send it back to manufactory for repair;
2. Send it back to manufactory for repair. |
| 12 |
hoist skids when rising. |
1.Worn steel rope or chain;
2. Impurity in pulley. |
1. Change damaged parts or steel rope;
2. Clean chain or pulley. |
| 13 |
Friction overspeed governor goes overheated |
1. Overload or overlong operation |
1. Reduce load;
2. Stop operation. |
| 14 |
Rope winder skids |
1. Worn friction plate;
2. Unscrewed screw. |
1. Change friction plate;
2. Tighten screw. |
| 15 |
hoist brings in unusual noise |
1. Worn gear, damaged bearing;
2. Lack of lubricant. |
Change components, and add lubricant. |
| 16 |
Protective switch QF trips |
Cable internal lesion, short circuit or phase line go to ground. |
Repair or change cable. |
