Gardner Denver PUREAIR EWC99C, Руководство по эксплуатации и обслуживанию

Страница: 24 / 69

13-11-607 Page 19
Water Filter Differential Pressure - The pressure drop across the water filter is continually monitored
by the AUTO SENTRY W. The unit will be shut down at a differential pressure of approximately 40 psid
(2.8 bars). This becomes active only after the compressor has been running and pressures have had
time to stabilize.
The pressure drop can be monitored at any time by selecting the alternate display “DIF PRES” (water
filter differential pressure) with the [?] HELP key. 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 Water Level - If the water management controls are unable to maintain proper water levels, the
compressor will shutdown to prevent damage. Check wiring and piping of the drain and fill solenoid
valves. A shutdown also occurs if wiring errors are detected in the float switch, and the display will
indicate a bad float switch.
High Pressure - The AUTO SENTRY W 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. 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.
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).
External Device - This input is provided for user- or dealer- installed devices needed by specific
applications. Other shutdown field selectable messages include: high vibration, phase relay, low voltage
relay, and water press. An optional expansion board must be installed to use this feature.
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.