Edwards EXC 100E, Инструкция по эксплуатации

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Introduction
D396-20-880 Issue H
1.5.2 Vent on Stop
If Vent on Stop is selected when you switch the Controller on, the vent-valve electrical supply remains off until Start
is selected. When Start is selected, the Controller switches the vent-valve electrical supply on. If Stop is then
selected, the Controller switches the vent-valve electrical supply off again.
If Vent on Stop is not selected when you switch the Controller on, the vent-valve electrical supply remains off until
Start is selected. When Start is selected, the Controller switches the vent-valve electrical supply on. If Stop is then
selected, the EXT pump will decelerate and the vent-valve electrical supply will remain on until the pump speed falls
to below 50% of full rotational speed; the vent-valve electrical supply will then be switched off.
1.5.3 Vent on Fail
If Vent on Fail is selected, then the setting of the Vent on Stop option determines how the vent-valve is controlled
in response to a Fail condition, as follows:

If you have selected Vent on Stop and a failure occurs, the Controller switches the vent-valve electrical
supply off approximately two seconds after the Fail condition is detected.

If you have not selected Vent on Stop, the EXT pump will decelerate and the vent-valve electrical supply will
remain on until the pump speed falls to below 50% of full rotational speed; the vent-valve electrical supply
will then be switched off.
If you have not selected Vent on Fail, the electrical supply to the vent-valve will not be switched off when a Fail
condition is detected.
1.6 Controller Fail conditions
1.6.1 General
Note: If you enable the Internal Timer (see Sections 1.6.2 and 3.2.3 ), the Controller will trip into Fail condition
only after the preset time has elapsed.
The Controller will trip into Fail condition if either of the following occurs:

The EXT pump does not reach 50% of full rotational speed within a preset time after it starts (the time set by
the adjustable Internal Timer: see Sections
1.6.2 and 3.2.3 ).

The EXT pump speed falls to below 50% of its full rotational speed.
When the Controller trips into Fail condition, the electrical supply to the EXT pump-motor is switched off and the
TMP Fail status output signal on the logic interface goes high. The operation of the vent-valve depends on how you
have configured the Controller (refer to Sections
1.5 and 3.2 ). To reset the Controller after a Fail condition has
occurred, refer to Section 4.7 .