Operating instructions G-BH1, G-BH9 2BH1 1

9 Servicing

 WARNING

Improper use of the unit can result in serious or even fatal injuries!

Have you read the safety precautions in Chapter

1, "Safety", Pg. 3 f.?

Otherwise you many not carry out any work with or on the pump-motor unit!

 WARNING

Improper use of the unit can result in serious or even fatal injuries!

All maintenance work on the pump-motor unit must always be performed by the Service

Department!

Maintenance work on the pump-motor unit may only be conducted by the operator itself when the related maintenance manual on hand!

Inquire with the Service Department!

9.2 Repairs/troubleshooting

Servicing

9.1 Emptying/Rinsing/Cleaning

Before any maintenance/servicing work, empty, rinse and clean the outside of the unit.

 Empty unit with air and rinse until all residues have been removed.

 Clean the outside of the unit with compressed air.

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Wear gloves and protective safety glasses.

Secure the surrounding area.

Clean the entire surface of the unit and exterior fan with compressed air.

Fault Cause Remedy

Motor does not start; no motor noise.

Motor does not start; humming noise..

At least two power supply leads interrupted.

One power supply lead interrupted.

Impeller is jammed.

Eliminate interruption by fuses, terminals or power supply cables.

Eliminate interruption by fuses, terminals or power supply cables.

Open vacuum pump/compressor cover, remove foreign body, clean.

Check or correct impeller gap setting if necessary.

Replace impeller. Impeller defective.

Rolling bearing on drive motor side or vacuum pump/compressor side defective.

Replace motor bearing or vacuum pump/compressor bearing.

Protective motor switch trips when motor is switched on.

Power consumption too high.

Winding short-circuit. Have winding checked.

Motor overloaded.

Throttling does not match specification on rating plate.

Reduce throttling.

Clean filters, mufflers and connection pipes if necessary.

Compressor is jammed. See fault: "Motor does not start; humming noise." with cause: "Impeller is jammed.".

Carried out by

Electrician

Electrician

Service*

Service

Service*

Service*

)

)

Electrician

Service*

)

Service*

)

Service*

)

)

© Gardner Denver Deutschland GmbH 25 / 32 610.44434.40.000

Servicing

Fault Cause Remedy Carried out by

Operator Pump-motor unit does not generate any or generates insufficient pressure difference.

Leak in system.

Wrong direction of rotation.

Incorrect frequency (on pump-motor units with frequency converter).

Shaft seal defective.

Different density of pumped gas.

Seal leak in the system.

Reverse direction of rotation by interchanging two connecting leads.

Correct frequency.

Replace shaft seal.

Take conversion of pressure values into account. Inquire with Service Department.

Electrician

Electrician

Service*

)

Service

Abnormal flow noises.

Change in blade profile due to soiling.

Flow speed too high.

Clean impeller, check for wear and replace if necessary.

Clean pipes. Use pipe with larger crosssection if necessary.

Service*

)

Operator

Abnormal running noise.

Compressor leaky.

Muffler soiled.

Ball bearing lacking grease or defective.

Seals on muffler defective.

Clean muffler inserts, check condition and replace if necessary.

Regrease or replace ball bearing.

Service*

)

Service*

)

Check muffler seals and replace if necessary. Service*

)

Seals in motor area defective.

Check motor seals and replace if necessary. Service

*

)

Only when the maintenance manual is at hand: rectification by the operator.

610.44434.40.000 26 / 32 © Gardner Denver Deutschland GmbH