Vacuubrand MD 1 VARIO-SP User Manual download pdf (Page 19)

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sures must also allow for the requirements of the respec-

tive application.

Pumps with AC motor:

In case of overload, the motor is shut down by a self-hold

thermal cutout in the winding.

Note: Only manual reset is possible. Switch off the pump

and disconnect from the power source. Identify and elimi-

nate the cause of failure. Wait approx. ve minutes before

restarting the pump.

• Note: In case of supply voltage below 100V, the lock

of the cutout might be impaired and the pump may

restart on its own after sufcient cooling down. Take

appropriate precautions, if an automatic restart of the

pump may lead to a dangerous situation (e.g., switch

off the pump and disconnect from the power source).

Pumps with DC motor:

A temperature sensor at the circuit board protects the mo-

tor: Current limitation in case the temperature at the circuit

board raises above 158°F (70°C). At temperatures above

185°F (85°C) the pump switches off. In case of a motor

blockage (after 10 start-up attempts) the pump switches off.

Note: Only manual reset is possible. Disconnect the pump

from the power source. Identify and eliminate the cause of

failure.

Maintenance and repair

In order to comply with laws (occupational, health and

safety regulations, safety at work law and regulations for

environmental protection) vacuum pumps, components

and measuring instruments can only be returned when

certain procedures (see section „Notes on return to the

factory“, pg. 60) are followed.

Take advantage of our service seminars, which put special

focus on the maintenance and repair of vacuum pumps.

NOTICE

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Vacuubrand MD 1 VARIO-SP User Manual Page 19