Edwards nXLi Series User Manual

Fault nding
A list of fault condions and their possible causes is provided here to assist in basic
troubleshoong. If unable to recfy a fault when using this guide, call your supplier or your
neares
t Edwards Service Centre for advice.
Symptom
The pump has failed to start or has stopped on page
30
The pump has failed to achieve the required performance on page 30
The pump is noisy on page 30
The pumping speed is poor or if pump down me is too long on page 31
The pump has failed to start or has stopped
Cause The electrical supply fuses have blown.
Remedy Ensure the external electrical supply is switched on and that the power indicator LED
(Figure 2 on page 12, it
em 6) is illuminated. If the LED does not illuminate, contact
Edwards.
Cause The motor controller has not reset aer an over temperature event.
Remedy Disconnect the mains supply and wait for at least one minute and aempt to restart the
pump. If the pump sll does not start, contact Edwards.
If the alarm indicator LED (Figure 2 on page
12, item 9) on the user interface control panel
is ashing it is indicang that the pump is experiencing a high current load from possibly a
high inlet pressure/ow. Adjust the inlet pressure/ow unl the pump performance
recovers.
The pump has failed to achieve the required performance
Cause The pressure measurement technique or gauge head is unsuitable or gives an incorrect
indicaon of pressure.
Remedy Ensure that the vacuum measurement equipment is calibrated and is in date and that the
corr
ect gauge range has been selected for the applicaon. Contact Edwards for further
assistance on gauge selecon, if required.
Cause The vacuum ngs are dirty or damaged.
Remedy Ensure that any vacuum ngs that are used are clean and scratch free.
Cause There is a blockage or high pressure in the exhaust line.
Remedy Ensure that any exhaust valves ed are not closed when the pump is running.
Cause The motor controller is current liming the supply.
Remedy If the alarm indicator LED (Figure 2 on page
12, item 9) on the user interface control panel
is ashing it is indicang that the pump is experiencing a high current load from possibly a
high inlet pressure/ow. Adjust the inlet pressure/ow unl the pump performance
recovers.
The pump is noisy
A770-10-880A - Fault nding
Page 30

Edwards nXLi Series Specifications

General

Brand	Edwards
Model	nXLi Series
Category	Water Pump
Language	English