Troubleshooting
Problem |
| Possible Causes |
| Probable Solutions |
Tool will not start. | 1. | No power at outlet. | 1. | Check power at outlet. |
| 2. | Cord not connected. | 2. | Check that cord is plugged in. |
| 3. | Blown fuse or tripped circuit | 3. | Replace fuse or reset circuit breaker. |
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| breaker. |
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Motor does not | 1. Disrupted power supply. | 1. | Check power supply. | |
rotate with power | 2. | Poor contact at the switch. | 2. | Repair switch. |
switch depressed. | 3. | Armature or field coil burnt. | 3. | Change coil. |
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| 4. | Broken stator coil. | 4. | Replace stator coil. |
| 5. | Carbon brushes worn out. | 5. | Replace carbon brushes. |
Abnormal noise | Overload of motor caused by | Reduce drilling pressure. Decrease force. | ||
from motor. Does | excessive drilling pressure. |
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not rotate, or |
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rotates slowly. |
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Partial short | Partial short circuit or open circuit | Repair or change armature. | ||
circuit. | at armature. |
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Main voltage too | Main power voltage too low. | Adjust main power voltage. | ||
low. |
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Gearbox becomes | 1. Overload. Dull bit. | 1. | Reduce load. Sharpen bit. | |
too hot. | 2. | Damp coils. | 2. | Dry coils. |
| 3. | Incorrect fitting. | 3. | Repair or change armature. |
| 4. | Decrease in voltage. | 4. | Adjust voltage. |
Sparking. | 1. | Short circuit or break at | 1. | Repair armature. |
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| armature. |
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| 2. | Surface of armature not | 2. | Inspect and clean armature. |
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| smooth and clean. |
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3.New carbon brushes installed. 3. Normal condition. Sparking will discontinue once new carbon brushes are worn flush with the armature.
Follow all safety precautions whenever diagnosing or servicing the tool. Disconnect power supply before service.
SKU 97743 | For technical questions, please call | Page 14 |
