Edwards iGx User Manual

© Edwards Limited 2014. All rights reserved. Page 25
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Operation
A546–00–880 Issue E
4.4 Automatic shut-down
CAUTION
If 'Run 'til crash' is selected, the pump(s) can be damaged and any warranties may be invalidated on the iGX
system equipment.
Normally, if an alarm condition exists, the iGX control system will shutdown the iGX system. If required 'run 'til crash'
operation can be requested. In this mode of operation, most alarm conditions will be ignored and the pump(s) will
continue to operate. For safety reasons the following alarms will shutdown the iGX system even if 'run til crash' is
selected:
Note: 'Run 'til crash' is automatically reset to 'off ' when the electrical supply is removed.
 POWERLOSS
 EMS
 DP ACTUAL SPEED
 DP THERMISTOR HIGH
 EXHAUST PRESSURE *
 DP STATUS
 MB ACTUAL SPEED
 MB STATUS
 MB THERMISTOR HIGH
Note: * M variants only
4.5 Unplanned shutdown and alarms
The iGX system is fitted with a number of pump protection sensors (refer to Table 7) that will give warnings and
alarms. The decision on whether or not to shutdown the pump is left with the tool.
If the iGX system has an unplanned shutdown, ensure that the cause of the shutdown is identified and rectified before
restarting. If in doubt, please call an Edwards Service Engineer.
4.6 Emergency stop
Note: The emergency stop switch is not an electrical isolator.
To shut down the iGX system in an emergency, press the emergency stop switch (Figure 4, item 1). Alternatively, the
emergency stop controls in a customer supplied control system can operate if the emergency stop circuit to the iGX
system is connected as described in Section 3.9.
Table 7 - Safety sensors
Safety sensor Shut-down condition
Dry pump motor thermal snap switch
(PTO)
Power is shut-off to the motor if the motor winding temperature exceeds
150°C.
Inverter thermistor Power is shut-off to the motor if the temperature exceeds 110°C.
Dry pump body temperature sensor
*
*
N and M variants only.
Power is shut-off to the motor if the pump body temperature exceeds
160°C
(Warning at 150°C).
Water circuit temperature sensor Power is shut-off to the motor if the temperature exceeds 70°C (Warning
at 60°C).

Edwards iGx Specifications

General

Brand	Edwards
Model	iGx
Category	Laboratory Equipment
Language	English