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A419-00-880
Issue
K
5.4
Manual shut-down
WARNING
Do not remove the inlet connection until the
pump
has been allowed to stop rotating and the
power has
been
isolated.
CAUTION
The pump
can
take up to three minutes to completely stop.
CAUTION
EPX N pumps must be purged for 30 minutes
with
nitrogen before the run signal is removed.
Use the following procedure to shut down the pump.
Use the control equipment to remove the run signal to the pump (refer to
Section 3.11
). The Run LED
(Figure
4,
item
3)
will then go
off,
and the pump running status output signal will
open.
Note:
After removing the run
signal,
the pump should be allowed to come to a stop before the run signal
is
re-applied. If the run signal
is
removed for more than 1 second and then re-applied before the pump has
stopped,
the pump will run down to a stop before restarting automatically. This
is
a function of the control
architecture of the pump.
When removing the
pump,
follow the instructions given in
Section
7.
5. 5
Status and fault indications
During
normal
operation,
only the Power and Run LEOs
(Figure
4,
items 2 and
3)
should be
on,
and the pump
running,
pump warning and pump alarm status outputs should be closed. If either or both of the other LEOs
(Figure
4,
items 4 and
5)
go
on,
or if either or both of the pump warning and pump alarm status output signal.s are
open,
refer
to
Section
6.6.
5.6
Unplanned shutdown and
alarms
WARNING
In the event of an unplanned shutdown the pump should not be restarted unless the cause is
identified and
rectified.
If this is not t he case, seal the inlet and exhaust of the pump and call a
Edwards
representative.
The EPX will automatically shutdown when a pump protection sensor operates (refer to
Section
1.3), or should the
inverter drive fail. When the EPX automatically shuts
down,
the Alarm LED
(Figure
4,
item
5)
is
illuminated,
and the
pump alarm status output signal opens.
If the EPX pump goes into an Alarm
state,
power to the pump must be completely switched off and then re-applied
in order for the alarm to clear. The pump fault must be identified and rectified before power is re-applied.
If there is an unplanned
shutdown,
ensure that the cause of the shutdown is identified and rectified before the pump
is restarted. If in
doubt,
please call an Edwards
representative.
©
Edwards
Limited 2017. All rights reserved.
Page 55
Edwards
and the
Edwards logo
are trademarks of
Edwards
Limited.
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