Troubleshooting

DANGER

danger

Live wires.

Risk of electrical shock.

  1. Electrical installation work must only be executed by qualified personnel.

DANGER

danger

Live wires. Carry out any work on the variable speed drive and motor.

Risk of electrical shock!

  1. Electrical installation work must only be executed by qualified personnel.

CAUTION

caution

Hot surface.

Risk of burns!

  1. Before doing anything that requires touching the machine, let it cool down first.

Illustration showing parts that may be involved during troubleshooting:

Problem

Possible Cause

Remedy

The machine does not start.

The motor is not supplied with the correct voltage.

  1. Check the power supply.

The motor is defective.

  1. Replace the motor.

The coupling (CPL) is defective.

  1. Replace the coupling (CPL).

The machine runs very noisily.

Worn coupling (CPL).
  1. Replace the coupling (CPL).

Stuck vanes.
  1. Repair the machine (contact Busch).

Defective bearings.
  1. Repair the machine (contact Busch).

The machine fumes or expels oil droplets through the gas discharge.

The exhaust filters (EF) are partially clogged.
  1. Replace the exhaust filters (EF).

An exhaust filter (EF) with o-ring is not fitted properly.
  1. Ensure the correct position of the exhaust filters (EF) and the o-rings.

The float valve (FV) does not work properly.
  1. Check the float valve.
  2. Repair the machine (contact Busch).

The oil is black.

Oil change intervals are too long.

  1. Flush the machine (contact Busch).

The inlet filter (optional) is defective.

  1. Replace the inlet filter.

The machine runs too hot.

  1. See problem "The machine runs too hot".

The oil is emulsified.

The machine sucked in liquids or significant amounts of vapor.

  1. Flush the machine (contact Busch).
  2. Clean the filter of the gas ballast valve (GB).
  3. Modify the operational mode (see Conveying Condensable Vapors).

For resolution of problems not listed in the troubleshooting table, please contact your Busch representative.