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20901106_EN_MD4_MV2_VARIO_select_V1.0_140818
Prevent internal condensation, transfer of liquids or dust.
The diaphragms and valves will be damaged, if liquids are
pumped in significant amounts.
Check the pump regularly for external soiling and depos-
its. Clean the pump if necessary to avoid an increase of
the pump’s operating temperature.
In case of overload, the motor is shut down by a
self-hold
thermal cutout
in the winding.
Note
: Only manual reset is possible. Acknowledge the er-
ror message at the controller. Switch off the pump and
disconnect from the power source. Identify and eliminate
the cause of failure. Wait approx. five minutes before re
-
starting 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.
