VACUUBRAND MV 2 NT VARIO - Manual (Page 37)

page 37 of 106
In case of overload, the motor is shut down by a self-hold
thermal circuit breaker in the winding.
Note: Only a manual reset is possible. Press the START/
STOP key at the controller to confirm the error message.
Switch off the pump and disconnect the electrical power
cord. Identify and eliminate the cause of failure. Wait ap-
prox. five minutes before restarting the pump.
Check fan regularly for dust/dirt. Clean if necessary. Avoid
overheating (e.g., due to hot process gases).
A warm up period (approximately 15 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
are attained.
Shutdown & storage
The pump can be switched off under vacuum.
Short-term:
Has the pump been exposed to condensate?
- Allow the pump to continue to run at atmospheric pres-
sure for a few minutes.
Has the pump been exposed to media which may damage
the pump materials or form deposits?
- Check and clean pump heads if necessary.
Has the pressure transducer been exposed to media which
may form deposits?
- Clean pressure transducer if necessary.
Long-term:
- Take measures as described above regarding short-
term shutdown.
- Separate the pump from the application.
- Close inlet and outlet ports (e.g., with transport caps).
- Store the pump under dry conditions.
NOTICE