▪ The electrical supply voltage is too high.
▪ The exhaust lter or exhaust line is blocked.
▪ The oil level is too low.
▪ The pump is lled with the wrong type of oil.
▪ The oil is contaminated.
▪ The process gas is too hot or the throughput is too high.
7.5 The vacuum is not maintained aer the pump is switched o
▪
The gas-ballast control is open.
▪
O-ring(s) are damaged or missing.
▪
The sha seals have deteriorated.
7.6 The pumping speed is poor
▪
The connecng pipelines are too small in diameter.
▪ The connecng pipelines are too long.
▪
The inlet-lter is blocked.
7.7 There is an external oil leak
▪
The oil pump sha seal is worn or damaged.
▪ The oil box gasket has deteriorated.
▪ There is an oil leak from gas-ballast control.
▪ There is an oil-leak from the drain-plug.
Page 33
A37132880_F - Fault nding
To Next Page
Loading...
Need help?
General
