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Operation
A540-55-880 Issue D
4.3 Manual shut-down
If the pump is stopped without the nitrogen purge cycle, for example by using the EMS button, on processes that
have condensable or solid by-products, then the pump may not restart.
The pump can be shut down using the front panel controls, the MicroTIM or the PDT. 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 4.6.
If the pump is not going to be required for some time, switch off the electrical supply and the cooling water supply.
4.3.1 Shut-down modes
Auto shut-down introduces a nitrogen purge cycle (N variant pumps) which lasts for 15 minutes before the pump is
shut down. This is the recommended shut-down mode.
Fast shut-down immediately stops the pump without gas purge.
4.3.2 Front panel control operation
Press and hold the stop button (Figure 2, item 4) for 5 seconds to stop the pump in Auto shut-down mode
(recommended, refer to Section 4.3.1 above). Repeat within 10 seconds to stop the pump in Fast shut-down mode.
The running LED (Figure 2, item 2) flashes whilst the pump is slowing down and will then turn off when the pump has
shut down.
4.3.3 PDT operation
Press the stop button on the PDT (refer to Appendix A1 for more information). Select either Auto or Fast shut-down
mode.
4.3.4 MicroTIM operation
Use the customer 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.
If the system is shut down and is not isolated from the electrical supply, do not release control. If
control is released, the system could be started by another Module.
Do not remove the inlet connections until the pump has been allowed to stop rotating and the
power has been isolated. The pump can take up to three minutes to completely stop.
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