Troubleshooting
36 GA01601_002_C1 - 03/2018 - © Leybold
Fault Possible cause Remedy Repair*
Pump gets hotter than usually
observed.
Cooling air supply is obstructed. Set pump up correctly. 3.1
Ambient temperature is too high. Set pump up correctly. 3.1/4.3.3
Process gas is too hot. Change the process. -
Oil level is too low. Add oil. 5.4
Oil is unsuitable. Change the oil. 5.4
Oil cycle is obstructed. Clean or repair the oil lines and
channels.
Service
Exhaust filter/exhaust line is
obstructed.
Replace the exhaust filter,
clean the exhaust line.
-
Exhaust valve is malfunctioning. Repair the valve. M. Kit 2
Deviating mains voltage. Check power supply raiting of the
motor and the mains supply
-
Oil in the intake line or in the
vacuum chamber
Oil comes from the vacuum system. Check the vacuum system. -
Blocked tandem valve. Clean or repair the valve. Compl. Set
Oil is turbid. Condensation. Degas the oil or change the oil and
clean the pump.
Precaution: open the gas ballast valve
or fit separator.
4.3.2/5.4
Pump is excessively noisy. Oil level is much too low
(oil level is no longer visible).
Add oil.
5.3/5.4
Intake pressure is too high. Reduce the intake pressure. -
Internal demister is clogged. Clean or replace demister. 5.6 / M. Kit 1
Coupling bushings worn out. Install new coupling bushings. Rep. Set 1
Vanes or bearings are damaged. Repair pump. Service
Faulty motor bearing. Exchange the motor bearing. Service
Oil leak at the side of the
motor.
Outer shaft seal damaged or worn
out.
Exchange the shaft seal. Rep. Set 1
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