Pump Display Terminal; Leds; Pump Start/Stop And Control; Figure 56 Pump Display Terminal - Edwards GXS Series Instruction Manual

Dry screw vacuum pump
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9. Pump display terminal

The PDT accessory provides pump on/off and status reporting. Warnings and alarms are
also indicated to the user. Up to two PDTs may be fitted.

Figure 56 Pump display terminal

9.1 LEDs

LOCAL CONTROL green LED illuminates continuously when this PDT has the control of
the pump.
PUMP ON green LED (within the pump start button) illuminates to indicate that the
pump is running. The LED illuminates continuously when the pump is on-process and
flashes when the pump is warming up, stopping or when it is in Green mode/standby
mode.
WARNING yellow LED illuminates to indicate that a pump warning is present. It flashes
when a new warning occurs until it is acknowledged by pressing ENTER when it goes
continuous until the warning clears. The warning LED also flashes when a new event is
present. Once the event has been acknowledged the warning LED will return to its
previous state.
ALARM red LED illuminates to indicate that a pump alarm is present. It flashes when a
new alarm occurs until it is acknowledged by pressing ENTER when it goes continuous
until the alarm clears.

9.2 Pump start/stop and control

To start or stop the pump the PDT must be in control, indicated by the local control LED
being illuminated.
To take or release the control briefly press CONTROL.
If something else is in control the error message 'Control locked' appears, refer to
'Control Holder' in the status menu.
M58800880_H - Pump display terminal
Page 120

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