Troubleshooting
!WARNING
For your own safety do not try and run the air compressor while troubleshooting.
TROUBLE | PROBABLE CAUSE | REMEDY |
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Compressor will not | 1. Unit is plugged into | 1. Remove extension cord |
run | extension cord |
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| 2. No electrical power | 2. Plugged in? Check |
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| fuse/breaker or motor over- |
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| load |
| 3. Blown fuse | 3. Replace blown fuse |
| 4. Breaker open | 4. Reset, determining why |
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| problem happened |
| 5. Thermal overload open | 5. Motor will restart when cool |
| 6. Pressure switch bad | 6. Replace |
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Motor hums but can- | 1. Low voltage | 1. Check with voltmeter |
not run or runs slow- | 2. Unit is plugged into | 2. Remove extension cord |
ly | extension cord |
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| 3. Shorted or open motor | 3. Replace motor |
| winding |
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| 4. Defective check valve or | 4. Replace or repair |
| unloader |
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Fuses blow/circuit | 1. Incorrect size fuse, circuit | 1. Check for proper fuse, use |
breaker trips repeat- | overloaded | |
edly |
| Disconnect other electrical |
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| appliances from circuit or |
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| operate compressor on its |
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| own branch circuit |
| 2. Unit is plugged into | 2. Remove extension cord |
| extension cord |
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| 3. Defective check valve or | 3. Replace or repair |
| under loader |
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TROUBLE | PROBABLE CAUSE |
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Thermal overload | 1. Low voltage | 1. Check with voltmeter | |||
protector cuts out | 2. Clogged air filter | 2. Clean filter (see | |||
repeatedly |
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| Maintenance section) | ||
| 3. Lack of proper ventila- | 3. Move compressor to well | |||
| tion/room temperature |
| ventilated area | ||
| too high |
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| 4. Unit is plugged into | 4. Remove extension cord | |||
| extension cord |
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Air receiver pressure | 1. Loose connections (fit- | 1. Check all connections with | |||
drops when com- | tings, tubing, etc.) |
| soap and water solution | ||
pressor shuts off |
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| and tighten | ||
| 2. Loose drain lock | 2. Tighten | |||
| 3. Check valve leaking | 3. Disassemble check valve | |||
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| assembly, clean or replace | ||
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| ! DANGER |
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| Do not disassemble | |||
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| check valve with air in | |||
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| tank; bleed tank | |||
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Excessive moisture | 1. Excessive water in air | 1. Drain receiver | |||
in discharge air | receiver |
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| 2. High humidity | 2. Move to area of less | |||
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| humidity; use air line filter | ||
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Compressor runs | 1. Defective pressure | 1. Replace switch | |||
continuously | switch |
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| 2. Excessive air usage | 2. Decrease air usage; com- | |||
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| pressor not large enough | ||
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| for a requirement | ||
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Compressor vibrates | Loose mounting bolts | Tighten | |||
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Air output lower than | 1. Broken inlet valves | 1. Have authorized service | |||
normal |
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| representative repair unit | ||
| 2. Intake filter dirty | 2. Clean or replace intake fil- | |||
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| ter | ||
| 3. Connections leaking | 3. Tighten connections | |||
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16 | 17 |
