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Maintenance
A344-02-880 Issue J
5.13 Basic fault-finding
A list of fault conditions and their possible causes is provided here to assist you in fault-finding. If you are unable to
rectify a fault when you use this guide, call your nearest Edwards Service Centre for help.
5.13.1 The pump has failed to start
z The electrical supply fuse is blown
z The electrical supply voltage does not match the motor
z The outlet pipeline or the outlet-filter (if fitted) is blocked
z The oil temperature is below 12°C
z The oil is too viscous
z The oil is contaminated
z The pump has seized after long storage
z The pump has been left to stand after contaminants have been pumped and has seized
z The motor is faulty.
5.13.2 The pump fails to achieve its specified performance
(Failure to reach ultimate vacuum).
z The measuring technique or gauge is unsuitable
z Yo u hav e f i l led th e pump w i t h the w r o n g type o f o il
z There is a leak in your vacuum system
z The gas-ballast control is set incorrectly
z The oil-level is low
z The oil is contaminated
z Your vacuum fittings are dirty or damaged
z The inlet-filter is blocked
z The pump has not warmed up
z The pump has failed to prime
z Motor is rotating in the wrong direction.
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