EN – 39
EN
Maintenance
Incidents
Causes
Corrective actions
The vacuum pump does not produce
a vacuum (
continued
)
Ultimate pressure obtained: a few 7.5 x10
-3
Torr (10
-2
mbar)
Gas ballast knob open (or supplied
with dry nitrogen C1,C2 Series).
•
Close the gas ballast or stop the dry air
supply.
O-ring pinched.
•
Replace by a new one.
One of the seals is damaged.
•
Replace by new ones.
One of the HP safety valves is
damaged.
•
Replace the HP safety valve.
Lubrication holes blocked.
•
Disassemble and clean.
Incorrect anti-noise device setting.
•
Repeat the assembly and setting.
Part forgotten in reassembly.
•
Repeat the reassembly.
Filter cartridge clogged.
Replace by a new cartridge.
Accessories
At the pump exhaust, the installation
produces an exhaust pressure of
1,125 Torr (1.5 bar).
•
Check the installation.
Oil mist eliminator cartridge clogged.
•
Replace.
Noisy pump
Oil level too high.
•
Drain and fill with a new oil.
Oil contaminated (presence of
particles).
•
Drain, flush and refill with clean oil.
Pump not prepared for the oil used.
•
Check the pump configuration or the
type of oil.
Incorrect motor power supply.
•
Check the power supply.
Motor bearings damaged.
•
Replace the motor after inspection.
Motor coupling incorrectly set or
damaged.
•
Check the setting, replace the motor
coupling.
Incorrect fan assembly.
•
Check the assembly.
Incorrect anti-suckback device
assembly.
•
Repeat the assembly.
Vanes damaged or stuck.
•
Replace the vanes.
Pump too hot
Ambient temperature too high.
•
Check that the temperature is between
12 and 45 °C.
Pump placed in a poorly ventilated
place or vents blocked.
•
Check the installation.
Operation at high pressure
P > 22 Torr (30 mbar).
•
Study an outside cooling drvice.
Excess pressure at exhaust.
•
Check the exhaust line.
Motor in over-voltage or motor in
short-circuit.
•
Check the voltage, replace the motor.
All series
C1
C2
C1 and C2
