Automatic Shut-Down; Unplanned Shutdown And Alarms - Edwards iH80 Instruction Manual

4.4

Automatic shut-down

If you select 'Run 'til crash', the pump(s) can be damaged and you may invalidate any warranties on the iH system
equipment.
Normally, if an alarm condition exists, the iH control system will shutdown the iH system. If required you can request
'run 'til crash' operation. 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 shut-down the iH system even if you have selected
'run til crash':
Note: 'Run 'til crash' is automatically reset to 'off' when the electrical supply is removed.
HCDP CURRENT HIGH/LOW (error numbers 310 and 312).
HCDP THERMISTOR HIGH (error number 512).
EXHAUST PRESSURE (error number 3912).
On an iH160, 1000 or 1800 system, the following alarms will cause only the HMB pump to shut down, provided 'run til
crash' is not selected:
HMB POWER HIGH/LOW (error numbers 810 and 812).
HMB PHASE IMBALANCE (error number 1012).
On an iH160, 1000 or 1800 system, the following alarms will cause only the HMB pump to shut down, whether 'run til
crash' is selected or not:
HMB CURRENT HIGH LOW (error numbers 710 and 712).
HMB THERMISTOR HIGH (error number 912).
4.5

Unplanned shutdown and alarms

The iH system is fitted with a number of pump protection sensors (refer to
alarms. The decision on whether or not to shutdown the pump is left with the tool.
If the iH system has an unplanned shutdown, ensure that the cause of the shutdown is identified and rectified before
restarting. If you are in any doubt, please call a Edwards Service Engineer.
Safety sensor
HCDP pump-motor thermistor
HMB pump-motor thermistor
Exhaust pressure transducer
Photohelic switch
*
iH600/1000/1800 systems only.
†
Accessory.
© Edwards Limited 2008. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
CAUTION
Table 7 - Safety sensors
Shut-down condition
When the thermistor in the HCDP pump-motor indicates that the temperature
of the pump-motor is nominally 150 °C.
*
When the thermistor in the HMB pump-motor indicates that the temperature
of the pump-motor is nominally 150 °C.
†
When the pressure in the exhaust pipeline is 9 psig or higher.
When the extraction from the exhaust enclosure is lost.
A590-00-880 Issue D
Table 7) that will give warnings and
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