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Troubleshooting
50
Error
Venting valve does
not operate
Vacuum pump does
not start
Vacuum pump
stopped
Vacuum pump does
not start
No or very little suc-
tion power
20901367_EN-US_PC3001 VARIO select Serie_V1.3_100720
Cause
Venting valve in
sensor defective.
Pumping unit
switched off.
Power plug not cor-
rectly plugged in or
pulled out.
VACUU·BUS plug-
in connection or ca-
bles defective or
not connected.
Overpressure in
outlet line.
Motor overloaded.
Motor overheated.
Thermal protection
triggered.
Leak in the suction
line or apparatus.
Condensate collec-
tion flask not
mounted correctly.
Condensate inside
the vacuum pump.
Gas ballast open
Gas ballast cap
porous or no longer
present.
Remedy
Replace defective
components.
Switch on Pumping
unit.
Check power con-
nection and cable.
Check
VACUU·BUS plug-
in connection and
cables to the con-
troller.
Open outlet line.
Ensure clear pas-
sage.
Check coolant con-
nection.
Ensure supply of
coolant.
Allow the motor to
cool down.
Clear error manu-
ally:
-> Disconnect
pumping unit from
power supply
-> Eliminate cause
of error
-> Restart pumping
unit
Check suction line
and apparatus for
leaks.
Check condensate
collection flask and
mount correctly.
Check equipment
for leaks.
Allow vacuum
pump to run for a
few minutes with
the suction nozzle
open.
Close the gas bal-
last
Check gas ballast
cap.
Replace defective
components.
Personnel
Specialist
Operator
Specialist
Operator
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