Specifications

Troubleshooting and corrective actions
Incidents Causes Corrective actions
84
• Incorrect motor power supply.
• Temperature too low.
• Gumming of seals after
prolonged storage.
• Oil contaminated after pumping.
• Motor coupling damaged.
• Pump seized, due to a stopping
after pumping in difficult
conditions (no draining or
flushing).
• Oil cold.
• Insufficient oil in the oil case.
• Oil contaminated.
• Oil pump inlet partially blocked.
• Lubrication holes blocked.
• Vane or spinner-cam (SD models)
damaged.
• Incorrect anti-suckback system
assembly.
• Direction of motor rotation
incorrect (three phase).
• Insufficient motor power.
• Inlet filter blocked.
• Insufficient oil in the oil case.
• Oil cold,
oil pump inlet blocked.
• Oil contaminated.
• Oil pump inlet partially blocked.
• One of the LP safety valves is
damaged.
• Part forgotten in reassembly.
Check the power supply.
Reheat the pump and its oil.
1 - Disassemble the motor and try
to turn the fan manually.
2 - Disassemble, clean the pump,
replace seals, reassemble.
Drain, flush and refill with clean
oil.
Replace by disassembling the motor.
Disassemble, clean, hone the
scratched metal parts (replace them
if necessary) and reassemble.
Warm pump.
Fill up to the level.
Drain, flush and refill with clean
oil.
Drain, and clean the oil pump inlet
duct.
Disassemble and clean.
Replace them.
Repeat the assembly and the setting.
Rewire.
Check the power supply.
Clean it.
Add oil.
Warm, disassemble, clean.
Drain, flush and start again with
clean oil.
Drain and clean the oil pump inlet
duct.
Replace.
Repeat the reassembly.
The pump is not running
The pump does not start
The vacuum pump does not
produce a vacuum
Ultimate pressure obtained: a few mbar, Torr