EN – 38
Incidents
Causes
Corrective actions
The pump is not running
Incorrect motor power supply.
•
Check the power supply.
Temperature too low.
•
Reheat the pump and its oil.
Gumming of seals after prolonged
storage.
•
Disassemble the motor and try to turn
the fan manually.
Disassemble, clean the pump, replace
seals, reassemble.
Oil contaminated after pumping.
•
Drain, flush and refill with clean oil.
Motor coupling damaged.
•
Replace by disassembling the motor.
Pump seized, due to a stopping after
pumping in difficult conditions (no
draining or flushing).
•
Disassemble, clean, hone the scratched
metal parts (replace them if necessary)
and reassemble.
The pump does not start
Oil cold.
•
Warm pump.
Insufficient oil in the oil case.
•
Fill up to the level.
Oil contaminated.
•
Drain, flush and refill with clean oil.
Oil pump inlet partially blocked.
•
Drain, and clean the oil pump inlet duct.
Lubrication holes blocked.
•
Disassemble and clean.
Vane of oil pump damaged.
•
Replace it.
Incorrect anti-suckback system
assembly.
•
Repeat the assembly and the setting.
Oil pressure sensor
It indicates a too low or too high
pressure.
Clear the line or check the manometer/
plug tightness.
It continues to indicate a too low or
too high pressure.
Disassemble, clean and reassemble using
maintenance kit.
The vacuum pump does not produce
a vacuum
Ultimate pressure obtained: a few mbar/Torr
Direction of motor rotation incorrect.
•
Rewire.
Insufficient motor power.
•
Check the power supply.
Inlet filter blocked.
•
Clean the inlet filter.
Insufficient oil in the oil case.
•
Add oil.
Oil cold, oil pump inlet blocked.
•
Warm, disassemble, clean.
Oil contaminated.
•
Drain, flush and start again with clean
oil.
Oil pump inlet partially blocked.
•
Drain and clean the oil pump inlet duct.
One of the LP safety valves is
damaged.
•
Replace the LP safety valve.
Part forgotten in reassembly.
•
Repeat the reassembly.
Troubleshooting and corrective actions
All series
C1
C2
C1 and C2
