M588-00-880 Issue E
Page 46 © Edwards Limited 2015. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Operation
The pump can be shut down using either the MCM MicroTIM, the PDT or the front panel controls. Note that only the
item in control can stop the pump (refer to Section 1.4).
Note: The EMS button will always stop the pump. It does not matter which item has control. Refer to Section 4.7.
If the pump is not going to be required for some time, switch off the electrical supply and the cooling water supply.
Seal the pump inlet and exhaust to prevent any moisture in the atmosphere from corroding the pumping mechanism.
4.4.1 MicroTIM operation
Use the control equipment to reset the pump start/stop signal to the interface connector. The Running LEDs will then
go off and the pump running status output signal will open. An Auto shut down cycle is always performed when the
pump is stopped using the MCM MicroTIM.
4.4.2 PDT operation
Press the stop button on the PDT (refer to Appendix A2 for more information). Choose whether to select Auto
or Fast shut down mode.
4.4.3 Front panel control operation
Press and hold the stop button (Figure 1, item 4) for 5 seconds to stop the pump in Auto shut down mode
(recommended). Repeat within 10 seconds to stop the pump in Fast shut down mode. The running LED (Figure 1,
item 2) flashes whilst the pump is slowing down and will then turn off when the pump has shut down.
4.5 Automatic shut down
Normally, if an alarm condition exists, the control system will shut down the dry pumping system. When the dry
pumping system shuts down, all the purge gas valves close and the pump stops. For dry pumping systems containing
a dry pump and booster combination, some alarms will cause only the booster to stop, and not the full dry pumping
system.
Table 23 - Alarm actions
Alarm description Alarm stops dry pump
Alarm stops booster
pump
EMS or system configuration fault Yes Yes
Exhaust pressure
*
*
Not applicable to systems with light duty gas module.
Yes Yes
Booster stator temperature
†
†
Not applicable to systems which do not contain a booster.
No Yes
Dry pump stator temperature Yes Yes
Booster status
†
No Yes
Dry pump status Yes Yes
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