Edwards GXS 160

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Operation
M588-00-880 Issue E
4.6 Unplanned shut down and alarms
The dry pumping system is fitted with a number of pump protection sensors that will give warnings and alarms, refer
to Table 24.
Refer to Section 4.5 for information about alarms and automatic shut down conditions.
If the dry pumping system has an unplanned shut down, ensure that the cause of the shut down is identified and
rectified before restarting. If in doubt, contact Edwards.
Note: The high temperature alarms on Edwards dry pumping systems are dry pumping system protection trips and
should be considered as an abnormal running condition. If a dry pumping system has tripped due to any high
temperature alarm it should be investigated and the reason for the alarm established. Once the fault has
been remedied the dry pumping system should be left for a minimum of 30 minutes before attempting to
restart.
4.7 Emergency stop
Note: The emergency stop switch is not an electrical isolator.
To shut down the dry pumping system in an emergency, press the emergency stop switch (Figure 1, item 1).
Alternatively, the emergency stop controls can be operated in the user’s own control system if the emergency stop
circuit has been connected to the dry pumping system as described in Section 3.8.
When emergency stop is selected:
 The dry pump and the booster pump are switched off.
 The solenoid valve(s) in the gas module close, to switch off the supply of purge gas to the pump.
 The solenoid valve(s) in the temperature control manifold(s) de-energise with loss of temperature control.
 The PDT will display ‘ALARM 1.01/STOP ACTIVATED’ (if connected) or it may display ‘ALARM 186.01/ DP INV
0040 0000 / EMS’.
 The running LED will go off.
 The alarm LED illuminates.
Table 24 - Pump protection sensors
Sensor Warning condition triggered Alarm condition triggered
Exhaust pressure transducer
*
*
Not available on dry pumping systems with the light duty gas module.
0.3 barg (4.4 psig) 0.4 barg (5.8 psig)
DP TEMP temperature
GXS160 and GXS160/1750 150 °C 160 °C
GXS250 and GXS250/2600 150 °C 165 °C
All GXS450 dry pumping
systems
170 °C 180 °C
All GXS750 dry pumping
systems
180 °C 190 °C
MB Stator temperature 120 °C 130 °C