TROUBLESHOOTING
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| SECTION | |
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| Electrical Faults | |
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PROBLEM |
| PROBABLE CAUSE |
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| REMEDY | |
Electrical Faults |
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A. Motor fails to start | 1. | Power supply failure. | 1. | Check fuses. |
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| 2. | Starter is inoperative. | 2. | Check supply mains. Also, | ||
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| check starter contacts for burning, |
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| replace if necessary. |
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| 3. | Starter overloads cut out. | 3. | Check current requirements on |
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| motor nameplate and adjust. |
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| 4. | Safety interlock is inoperative. | 4. | Check and adjust as needed. |
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B. Motor starts, but will not take | 1. | Too much belt tension. | 1. | Check belt tension and adjust | ||
load. |
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| as necessary. Refer to section 4. |
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| 2. Motor is improperly wired. | 2. | Check terminal connection |
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| with manufacturers connection |
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| diagram in conduit box and adjust |
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| as necessary. |
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| 3. | Defective starter winding. | 3. | Check current in each phase |
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| with an ammeter. If there is |
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| marked difference in current on |
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| any phase, contact the motor |
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| manufacturer. |
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C. Motor starts when | 1. | Worn bearings. | 1. | Check and replace if necessary, |
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disconnected from load, but will |
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| in accordance with manufacturers |
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not when connected. |
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| literature. |
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D. Jackscrew does not operate | 1. | 1. | Allow cooling for 10 minutes, |
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after extended running. | activated. | and then retrying. |
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E. Hydraulic cylinders or | 1. | Zero speed switch is |
| 1. Check zero speed sensor |
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Jackscrews operate while rotor is | inoperative. |
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| position. |
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in motion. |
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| 2. | Check zero speed |
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| electrical circuit. |
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F. Jackscrew motor continues | 1. | Limit switches not properly |
| 1. Set the limit switches |
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running after jackscrew reaches | set. |
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| using the procedure in |
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its normal extended or retracted |
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| section 4. |
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position. |
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| 2. | Check the electrical |
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| circuit. |
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G. Cutting chamber only – | 1. | Limit switch on mounting |
| 1. | Adjust the mounting |
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Jackscrew motor continues | bracket not properly set. |
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| bracket switch. Refer to |
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running after motion of cutting |
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| section 4. |
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chamber stops – Chamber may be |
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| 2. | Check electrical circuit |
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open or closed. |
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I. Hydraulic Pump Motor | 1. Limit switches not properly set. |
Continues to run after Chamber |
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or cradle closes. |
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1.Check limit switches using procedure in Section 4
2.Check the electrical circuit.
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