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A419-00-880 Issue K
~CWARCS
-·
.
Main factors that will affect the service intervals of the EPX pump
are:
:::s
r-t'
(1)
:::s
OJ
:::s
n
(1)
•
The ambient temperature in which the pump runs · Higher ambient temperatures will result
in
shorter
service intervals
(refer
to
Table 6
for the ambient operating temperature range)
•
The temperature and flow rate of the cooling water delivered to the pump · higher
water
temperatures and
a lower flow rates will result in shorter service intervals
(refer
to
Table 9
for cooling
water
supply
details)
•
Rapidity of cycling · rapid cycling applications
will
result in shorter service intervals
•
Application· processes that require a Nitrogen purge (EPX N-series pumps)
will
typically result
in
shorter
service intervals
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
Is the electrical supply correctly
Ensure that the electrical supply is
when the electricity supply is
connected?
correctly connected to the EPX
switched on
pump; refer to
Section
3.
9
and
3.1
0.
The Run LED does not
illuminate,
or
Is
the EPX pump incorrectly connected Ensure that the connections
the pump running status output
to the control equipment?
between the control equipment and
signal is
open,
when
the start signal
the interface connector are correct:
is set
refer to
Section 3.11
The pump alarm status output signal
Is
the pump
incorrectly
connected to
Ensure that the connections
is open and the Alarm LED is off
the control equipment?
between the control equipment and
the
interface
connector are correct
to
Section 3.11
.
The pump alarm status output signal Has the cooling
water
supply failed?
Allow the EPX pump to cool down
is open and the Alarm LED is
for at least 20 minutes. Ensure that
illuminated
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
Has the run signal been removed and
Removal and re-application of the
pump decelerates
then re-applied before the pump has
run signal may cause a low
volume
stopped?
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
Is nitrogen gas flowing?
Check nitrogen purge gas is flowing
signal
is
open and the
warning
LED is
into the gas module. If gas is flowing
illuminated
and the
warning
does not
clear,
contact the nearest Edwards service
centre.
Other
Contact the nearest Edwards service
centre.
Page 60
©
Edwards Limited
2017.
All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards
Limited.
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