The Pump Surface Temperature Is Above 100 °C; The Vacuum Is Not Fully Maintained After The Pump Is Switched Off; The Pumping Speed Is Poor; There Is An External Oil Leak - Edwards RV3 Instruction Manual

7.5 The pump surface temperature is above 100 °C
Note:
If the inlet pressure is continuously higher than 100 mbar (1 x 10
temperature of the RV12 pump can reach 115 °C when the ambient temperature is 40 °C.
▪ The ambient temperature is too high.
▪ The cooling-air supply is insufficient or is too hot.
▪ The electrical supply voltage is too high.
▪ The outlet-filter or the outlet pipeline is blocked.
▪ The oil-level is below minimum level.
▪ The pump has been filled with the wrong type of oil.
▪ The oil is contaminated.
▪ The process gas is too hot or the throughput is too high.

7.6 The vacuum is not fully maintained after the pump is switched off

▪ The gas-ballast control is open (in position 'I' or 'II').
▪ The inlet valve-pad is damaged.
▪ The inlet valve has not closed.

7.7 The pumping speed is poor

▪ The connecting pipelines are too small in diameter.
▪ The connecting pipelines are too long.
▪ The inlet-filter is blocked.

7.8 There is an external oil leak

▪ The outer shaft-seal is worn or damaged.
▪ The oil-box gaskets have deteriorated.
▪ There is an oil leak from the gas-ballast control.
▪ There is an oil leak from the drain-plug.
▪ There is an oil leak from the sight-glass.
A65201880_AA
A65201880_AA - Fault finding
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