A533-23-880 Issue C
Page 84
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operation
Use the following procedure to check and adjust the nitrogen pressure:
1. Use the Setup/Inlet Purge menu to turn off inlet-purge.
2. Use the Setup/Gas ballast menu to turn on gas-ballast.
3. Refer to Figure 6. If the pressure low LED (6) and the pressure high LED (5) are both on and the pressure warning
LED (3) is off, the nitrogen pressure is correct, otherwise continue at Step 4.
4. Pull up the top of the pressure regulator (4) to unlock it.
5. Adjust the pressure regulator (4) until the pressure high and pressure low LEDs (5, 6) are both on and the
pressure warning LED (3) is off. Alternatively, use the Status/SS purge menu to display the nitrogen flow, and
adjust the pressure regulator (4) until a pressure of 6.0 psi is displayed.
6. Push down the top of the pressure regulator (4) to lock it.
5.7
Monitor the status of the iF system
Notes:
If you have selected the Status menu and then do not press any button for five minutes, the display will
change to the Normal display: refer to Section 5.3.
If a sensor is not fitted, the corresponding display line will show 'NP' (not present).
Use the Status menu or the Setup/Service/View Status menu to display sensor readings and the values of internal
clocks and counters. The information that can be displayed (up to two items of information at a time) is shown in
Table 17.
5.8
Warning and alarm indications
Notes:
Refer to Section 6 for a full list of the warning and alarm messages and their meanings.
Unless you have changed the corresponding setpoints (refer to Section 5.2), nitrogen purge flow and
pressure warning conditions will occur if an iF system is operated for extended periods with the inlet
pressure close to atmospheric pressure.
If a warning or alarm condition exists:
The top line of the display on the Pump Display Terminal will change to 'WARNING' or 'ALARM', together with
an error number.
The bottom line of the display will show the warning or alarm message or (for some errors) will be blank.
The warning or alarm LED on the Pump Display Terminal will flash.
To acknowledge the warning or alarm, press the ENTER button. If the warning or alarm condition has cleared, the
warning or alarm LED will go off. If the warning or alarm condition is still present:
The warning or alarm LED will stay on.
If the warning or alarm condition does not have an advisory message (refer to Section 6.16), the display will
then change to normal display: refer to Section 5.3.
If the warning or alarm condition has an advisory message (refer to Section 6.16), the display will show two
lines which describe a simple check which you can make to identify the cause of the fault and to rectify the
fault. When you have read the message, press the ENTER button again; the display will then change to
normal display: refer to Section 5.3.
