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Maintenance
A419-00-880 Issue F
6.6 Fault finding
Refer to Table 17 and 18 for fault finding.
Table 17 - Fault finding
Symptom Check Action
The Power LED does not illuminate
when the electricity supply is
switched on
Is the electrical supply correctly
connected?
Ensure that the electrical supply is
correctly connected to the EPX
pump; refer to Section 3.9 and 3.10.
The Run LED does not illuminate, or
the pump running status output
signal is open, when the start signal
is set
Is the EPX pump incorrectly connected
to your control equipment?
Ensure that the connections
between your control equipment
and the interface connector are
correct: refer to Section 3.11
The pump alarm status output signal
is open and the Alarm LED is off
Is the pump incorrectly connected to
your control equipment?
Ensure that the connections
between your control equipment
and the interface connector are
correct to Section 3.11.
The pump alarm status output signal
is open and the Alarm LED is
illuminated
Has the cooling water supply failed? Allow the EPX pump to cool down
for at least 20 minutes. Ensure that
the cooling water supply is correctly
connected to the EPX pump, and is
switched on and meets the flow and
pressure requirements of
Section 2.4. Restart the pump.
A whistling sound is heard as the
pump decelerates
Has the run signal been removed and
then re-applied before the pump has
stopped?
Removal and re-application of the
run signal may cause a low volume
noise, but it is not harmful to the
pump. It is recommended that the
pump be allowed to come to a halt
before the run signal is re-applied.
The pump warning status output
signal is open and the warning LED is
illuminated
Is nitrogen gas flowing? Check nitrogen purge gas is flowing
into the gas module. If gas is flowing
and the warning does not clear,
contact your nearest Edwards
service centre.
Other Contact your nearest Edwards
service centre.
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