Edwards iH Dry Pumping Systems, iH80, iH600, iH1000

If you need to shut down the iH system quickly, use the Fast shut-down option. When you
select Fast shut-down, the following actions will occur (with a small time delay between each
action):
• On an iH600 or iH1000 system, the HCMB pump is switched off.
• The gas solenoid-valves are opened to switch on the nitrogen purges to the HCDP pump.
• After approximately 15 seconds (for an iH80/iH600 system) or approximately 30 seconds (for
an iH1000 system), the gas solenoid-valves are closed to switch off the nitrogen purges to the
HCDP pump, and at the same time the HCDP pump is switched off.
• The LED on the On button on the Pump Display Terminal (Figure 1-8, item 1) goes off.
5.11 Automatic shut-down
CAUTION
If you select 'Run til crash', the pump(s) can be damaged and you may invalidate any
warranties on the iH system equipment
Notes:
The emergency stop button, the emergency stop signal from your control equipment (if fitted) and
the safety sensors (see Section 1.12.3) will still shut down the iH system, even if you have selected
'Run til crash'.
Use the Setup/Run Til Crash menu to select 'run til crash'.
'Run til crash' is automatically reset to 'off ' when the iH system is disconnected from the
electrical supply, or the electrical supply is switched off.
Normally, if an alarm condition exists, the iH control system will shut-down 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. Note however that for
safety reasons the following alarms will shut down the iH system even if you have selected
'run til crash':
• HCDP CURRENT HIGH/LOW (error numbers 310 and 312).
• HCDP THERMISTOR HIGH (error number 512).
• EXHAUST PRESSURE (error number 3912).
On an iH600 or iH1000 system, the following alarms will cause only the HCMB pump to shut
down, provided 'run til crash' is not selected:
• HCMB POWER HIGH/LOW (error numbers 810 and 812).
• HCMB PHASE IMBALANCE (error number 1012).
iH Dry Pumping Systems 5-11