TROUBLESHOOTING
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| Pump | motor |
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| 1. Low voltage. |
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| 1. | Check power line for proper voltage. |
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| will not start |
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| 2. | Open | circuit | in |
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| 2. | Inspect all lead connections on motor, |
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| motor, | switch | or |
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| switch and cord for loose or open connec- |
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| cord. |
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| tions. |
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| 3. | Tank already pres- |
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| 3. | Motor will not start if tank pressure is too |
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| surized. |
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| high. |
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| 4. | Thermal | overload |
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| 4. Thermal overload switch has tripped, wait |
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| switch. |
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| for motor to cool, then reset switch by |
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| pressing red button. |
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| Pump | motor |
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| 1. | Short circuit in line |
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| 1. | Inspect cord or plug for damaged insula- |
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| starts; | but |
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| cord or | plug. |
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| tion and shorted wires. |
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| fuses | blow or |
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| 2. Short circuit in motor |
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| 2. | Inspect all connections on motor for loose |
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| circuit | break- |
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| or | loose | connec- |
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| or shorted terminals or worn insulation. |
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| ers trip. |
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| tions. |
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| 3. | Incorrect | fuses | or |
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| 3. | Install correct fuses or circuit breakers. |
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| circuit | breakers | in |
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| power line. |
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| Low pressure |
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| 1. | Air | leaks | in flexible |
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| 1. | Check air hoses and all connections for |
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| at the tool |
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| hoses. |
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| leaks. |
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| 2. | Pressure gauge bad. |
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| 2. | Check pressure in line with known good |
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| gauge. |
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| 3. | Pressure | regulator |
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| 3. | Adjust pressure regulator, if no improve- |
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| bad. |
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| ment inspect regulator for leaks or |
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| replacement. |
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| Low pressure |
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| 1. | Air leaks in tanks or |
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| 1. Check air tanks, pipes and all connections |
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| at the tanks |
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| delivery pipes. |
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| for leaks. |
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| 2. | Drain valve open. |
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| 2. | Close drain valve. |
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| 3. | Safety valve releas- |
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| 3. | Replace safety valve. |
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| ing below 125 PSI. |
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| 4. | Inspect and clean air filter. |
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| 4. | Air | filter clogged. |
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| 5. | Check gaskets on cylinder head assem- |
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| 5. | Gaskets leaking. |
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| bly, repair or replace as needed. |
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| 6. | Worn rings. |
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| 6. | Inspect and replace pump piston rings. |
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| Compressor |
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| 1. | Improper oil level. |
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| 1. | Check oil level and add oil. |
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| knocking |
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| 2. | Air filter clogged. |
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| 2. | Inspect and clean air filter. |
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| 3. | Piston |
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| 3. | Inspect and repair piston and connecting |
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| loose. |
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| rod. |
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| Motor runs hot |
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| 1. | Cooling fins dirty. |
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| 1. | Clean cylinder fins and motor area. |
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| 2. | Air filter clogged. |
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| 2. | Inspect and clean air filter. |
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Model H3370/H3371Air Compressors |