Trouble shooting
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The operator or maintenance personnel can perform some corrective actions, and others may require the assistance of a qualified Bosch technician or your dealer.
PROBLEM | SYMPTOMS | RESOLUTION | ||
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Excessive air tank | • | Pressure switch does not | • | Set the On/Off switch to Off, if the unit |
pressure – safety |
| shut of motor when com- |
| does not shut off contact a Bosch fac- |
valve pops off |
| pressor reaches |
| tory service center or a Bosch authorized |
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| pressure |
| service center |
| • | Pressure switch | • | Contact a Bosch factory service center or |
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| too high |
| a Bosch authorized service center |
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Air leaks | • | Tube fittings are not tight | • | Tighten fittings where air can be heard |
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| enough |
| escaping. Check fittings with soapy water |
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| solution. Do not overtighten. |
Air leaks in air tank or | • | Defective air tank | • | Air tank must be replaced. Do not repair |
at air tank welds |
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| the leak |
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| • Warning: Risk of bursting. Do not drill | |
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| into, weld or otherwise modify air tank or |
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| it will weaken. The air tank can rupture or |
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| explode. |
Air leaks between | • | Leaking seals | • | Contact a Bosch factory service center or |
head and valve plate |
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| a Bosch authorized service center |
Air leaks from safety | • | Defective safety valve | • | Operate safety valve manually by pull- |
valve |
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| ing on ring. If valve still leaks, it must be |
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| replaced. |
Knocking noise | • | Defective safety valve | • | Operate safety valve manually by pull- |
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| ing on ring. If valve still leaks, it must be |
| • | Pump oil is low |
| replaced. |
| • | Add | ||
| • | Carbon | • | Contact a Bosch factory service center or |
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| a Bosch authorized service center |
Pressure reading on | • | Regulator is not adjusted | • | It is normal for some pressure drop to |
the regulated pressure |
| correctly for accessory |
| occur when an accessory is used, adjust |
gauge drops when an |
| being used |
| the regulator. |
accessory is used |
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| • | Note: Adjust the regulated pressure |
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| under flow conditions while accessory is |
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| being used. |
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