User manual

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go into Cool Down mode where an output is turned on (one of the configurable
outputs must be set to Cool Down). Once the Cool Down time has expired, the
fuel relay is turned off and the controller enters the OFF mode. By default it is
possible to manually bypass cool down by pressing the OFF or AUTO keys. To
prevent this, the Bypass Cooldwn can be set to disabled.
If a failure occurs, cool down is bypassed and the GSC400 goes into the
FAILURE mode. The low fuel failure is the exception; it will allow cool down.
The controller then enters one of the OFF, AUTO, or FAILURE modes. If the
ETS On Duration is set to a value greater than 0 seconds an output will be
turned on (one of the configurable outputs must be set to “ETS” – see section
3.10 on page 69).
3.3.2.1 Shutdown Inhibit for Engine Driven Compressors
Firmware versions 2.06 and above contain this feature.
The GSC400 has a feature to protect engine driven compressors by preventing a
shutdown until the compressor pressure is below a set pressure. The following
have to be present for this feature to work:
1. Aux Analog 1 or Aux Analog 2 must be set to an input pin (Aux Analog 1/2
> Input Pin menu) and to the Pressure type (Aux Analog 1/2 > Analog
Group menu).
2. The Shutdown Inhibit Source must be set to Aux Analog 1 or Aux Analog
2 (Engine Logic > Shut Inhibit Src menu).
3. The Shutdown Inhibit Threshold pressure must be set (Engine Logic >
Shut Inhib Thr)
With these set appropriately the GSC400 will allow cool down but will not allow
the engine to stop until the compressor pressure (as sensed by the Auxiliary
Analog 1 or 2 inputs) is below the Shutdown Inhibit Threshold.