Edwards XDS 5 User Manual

A726-01-880 Issue M
Page 28 © Edwards Limited 2010. All rights reserved.
Edwards and Edwards logo are trademarks of Edwards Limited.
Maintenance
5.8 Fault-finding
5.8.1 The pump has failed to start
 The pump is not connected to the electrical supply (e.g. blown fuse, etc.)
 The electrical supply voltage does not match that for which the motor has been configured
 The motor is faulty
 Thermal overload has tripped the pump.
5.8.2 The pump has failed to achieve the required performance
 There is a leak in your vacuum system
 Your pressure measurement technique or gauge head is unsuitable or gives an incorrect indication of pressure
 Your vacuum fittings are dirty or damaged
 The inlet strainer is blocked
 There is a blockage in the exhaust line
 The pump contains traces of process vapours or atmospheric water vapour. Run the pump for at least an
hour on high flow gas-ballast ‘II’ then continue running using low flow gas-ballast ‘I’ for up to 24 hours to
return the pump to its specified performance
 The pump is outside the specified range of operating conditions
 The gas-ballast control (if fitted) is not properly closed
 The tip seals need replacing
 If the electrical supply voltage is more than 10% below the lowest voltage specified on the voltage indicator,
the pump may operate yielding a degraded vacuum performance.
5.8.3 The pump is noisy
 The bearings are worn
 The pump is contaminated with solid particles
5.8.4 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 electrical supply voltage is too high
 The process gas is too hot
 The fan is not working
5.8.5 The pumping speed is poor
 The connecting pipelines are too small in diameter
 The connecting pipelines are too long
 The inlet strainer is blocked

Edwards XDS 5 Specifications

General

Brand	Edwards
Model	XDS 5
Category	Water Pump
Language	English