The Pump Failed To Achieve Specified Performance (Failure To Reach Ultimate Vacuum); The Pump Is Noisy; The Pump Surface Temperature Is Above 100°C - Edwards E2M28 Instruction Manual

A373-10-880 Issue T
5.11.3 The pump failed to achieve specified performance (failure to reach ultimate
vacuum)
The measuring technique or gauge is unsuitable.

There is a leak in the external vacuum system.

The gas-ballast control is open.

The oil level is too low.

The pump is filled with the wrong type of oil.

The oil is contaminated.

The pump has not primed.

The vacuum fittings are dirty.

The inlet-filter is blocked.

The pump has not warmed up.

The motor shaft rotates in the wrong direction (three phase motors only).

5.11.4

The pump is noisy

The motor fan-cover is damaged.

The coupling and fan assembly are poorly adjusted.

The motor coupling is loose.

The motor bearings are worn.

The oil is contaminated with solid particles.

One of the pump blades is sticking.

5.11.5 The pump surface temperature is above 100°C
The ambient temperature is too high.

The cooling-air supply is insufficient or is too hot.

The cooling-air supply is blocked.

The electrical supply voltage is too high.

The exhaust filter or exhaust line is blocked.

The oil level is too low.

The pump is filled with the wrong type of oil.

The oil is contaminated.

The process gas is too hot, or the throughput is too high.

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