Troubleshooting

DANGER

Live wires.

Risk of electrical shock.

Electrical installation work must only be executed by qualified personnel.

CAUTION

Hot surface.

Risk of burns!

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

Description
IS	Inlet screen	CPL	Coupling

Problem	Possible Cause	Remedy
The machine does not start.	The motor is not supplied with the correct voltage.	Check the power supply.
	The motor is defective.	Replace the motor.
	The coupling (CPL) is defective.	Replace the coupling (CPL).
The machine does not reach the usual pressure on the suction connection.	The inlet screen (IS) is partially clogged.	Clean the inlet screen (IS).
	The inlet filter cartridge (optional) is partially clogged.	Replace the inlet filter cartridge.
	Internal parts are worn or damaged.	Repair the machine (contact Busch).
The machine runs very noisily.	Worn coupling (CPL).	Replace the coupling (CPL).
	Oil level too low.	Top up oil.
	Defective bearings.	Repair the machine (contact Busch).
The machine runs too hot.	Insufficient cooling.	Remove dust and dirt from the machine .
	The cooling fan’s rotation direction is incorrect.	Check the rotation direction of the cooling fan, if needed switch any one of the two power supply wires.
	Ambient temperature too high.	Observe the permitted ambient temperature, see Technical Data.
	Temperature of the process gases at the inlet too high.	Observe the permitted gas inlet temperature, see Technical Data.
	Oil level too low.	Top up oil.

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