Gardner Denver AUTO SENTRY RS2000, Operating And Service Manual

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13-8-623 Page 4
CAUTION
Machine damage will occur if compressor is repeatedly restarted after high
temperature stops operation. Find and correct the malfunction before resuming
operation.
Separator Differential Pressure - The pressure drop across the separator is continually monitored by
the controller. The unit will be shut down at a differential pressure of approximately 15 psid.
The pressure drop can be monitored at any time by selecting the DIF PRES alternate display. This
should be checked while the compressor is delivering at full capacity. A service advisory comes on to
recommend maintenance prior to this shutdown.
High Pressure - The controller will first attempt to unload and blow down the unit if excessive pressures
are detected in the reservoir or the plant system. If unsuccessful, a shutdown will occur. Shut down will
also occur if a defective transducer is detected, or improper zero adjustments are detected. The display
will indicate the location of the high sensed pressure or transducer (xducer) error. Check that all
adjustments have been properly made, and all connections are secure.
Low Sump Pressure - The controller will shutdown the unit if inadequate reservoir pressure is detected
after loading the compressor. If this occurs, check the wiring and piping to the solenoid valves.
Emergency Stop - Press the emergency stop button to shut down the unit and the controller. To restart,
pull the button out to its normal position and reset the controller. This should be used for emergency
purposes only - use the keypad [STOP/RESET] for normal controlled stopping.
Power Failure - Following power interruptions, the controller will remain in a shutdown state (unless
programmed for auto restart).
Connection Failure - The controller checks input connectors and will shutdown if they become
unplugged.
Other Shutdowns - The controller runs continuous diagnostic checks of its own operation and the
sensors to which it is connected. Refer to the service section for a complete listing of shutdowns and
remedial actions.
OTHER CONTROL FEATURES
Auto restart after power failure - The controller normally displays "SHUTDOWN - POWER FAILURE"
after power has been interrupted and restored. Press the [STOP / RESET] key and press [RUN] to
restart compressor operation.
If programmed for automatic restart, the controller pauses and begins counting down when power is
restored. This time is adjustable in the programming steps. This must be at least several seconds, but
may be set longer to allow other plant loads to start up first. After the countdown is complete, the
controller resumes the mode of operation prior to the power interruption.
A flashing green power indicator advises that the unit has been set for automatic restart after power
failure. A steady green light indicates auto restart is disabled.