VACUUBRAND PC 3012 VARIO plastic housing - Manual (Page 45)

page 45 of 129
its. Clean the pump if necessary to avoid an increase of
the pump’s operating temperature.
Operation with silencer (optional) at the outlet: Operating
the pump at a high inlet pressure or pumping dusty gases
for a long time may cause clogging of the silencer. Check
the silencer regularly and replace if necessary.
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. Avoid overheating (e.g., due to hot process
gases).
Important notes regarding the use of gas bal-
last
Gas ballast is a continuous purge to keep the pump’s in-
terior as clean as possible and to reduce the possibility of
condensation inside the pump.
➨
Air and pumped media might react inside the pump or
at the outlet of the pump and form hazardous or explo-
sive mixtures, when you use air rather than inert gas
for the gas ballast. This constitutes a risk of significant
damage to equipment and/or facilities, a risk of per-
sonal injury or even loss of life.
+
Make sure that air/gas intake through the gas ballast
valve can never lead to hazardous, explosive or other-