Troubleshooting Guide (continued)
Motor
Problem |
| Probable Cause | Suggested Corrective Action | |
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Brake does not stop | 1. | Brushes not seated | 1. | Inspect/clean/replace |
blade within 6 sec- |
| or lightly sticking. |
| brushes. See “Maintenance” |
onds. |
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| section. |
| 2. | Motor brake winding | 2. | Use only recommended |
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| overheated from |
| blades/accessories. |
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| use of prohibited |
| Let motor cool down. |
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| accessory or rapid |
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| on/off cycling. | 3. | Retighten |
| 3. | Arbor screw loose. | ||
| 4. | Get authorized service. See | ||
| 4. | Other | ||
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| “Troubleshooting of brake” | ||
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| section. |
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Motor does not | 1. | Fuse. | 1. | Check fuse, or circuit breaker. |
start. | 2. | Brushes worn. | 2. | See “Maintenance” section. |
| 3. | Other. | 3. | Get authorized service. |
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Brush sparking | 1. | Normal automatic | 1. | None |
when switch |
| brake working prop- |
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released. |
| erly. |
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Wiring Diagram
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| White Field |
| Red Brush |
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| Lead |
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Connector |
| Red | Lead | |
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| Brush | |
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| White |
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| Armature |
Cord w/Plug |
| Gray Brake | N.C. |
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| Lead |
| Brush |
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| Black |
| White Brush |
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| N.O. Switch | Lead |
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Trouble Shooting of Brake by Qualified Service Person Only
1.Check commutation at no load. If there is a heavy sparking which follows the curvature of the commutator: replace the armature.
2.To continue trouble shooting, now unplug the power cord.
3.Install service brushes, especially if delayed
4.Check brake circuit for continuity: remove brush caps and brushes. Use ohmmeter to check continuity from brass brush holder to brush holder. If open, locate exact place using ohmme- ter. As indicated by test, tighten con- nection or replace field assembly or replace switch.
5.After repair, check direction of blade rotation vs. guard arrow.
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