GE Hydran 201i, Instruction Manual

Page: 222 / 300

Chapter 12 • Troubleshooting
12-6 Rev. 6, March 2011 Part 17997
• Alarm cause(s) : Daily trend below the DayTrAlr L alarm set point. Probably indicates
a gas level reading problem.
Proceed as follows:
1. Verify the daily trend calculated by the Hydran 201T i . This value is displayed in the
Main Display mode (see Section 4.2.2 on page 4-4) and also in the DailyTrend
screen in the Gas;DailyTrend submenu (see Section 4.5.2.3 on page 4-17). If this
value seems normal, verify whether the value of the alarm set point is adequate. This
parameter was probably set to a value that is too high.
2. Verify the gas level measured by the H201T i . This value is displayed in the Main
Display mode (see Section 4.2.2 on page 4-4) and also in the GasLevel screen in the
Gas;GasLevel submenu (see Section 4.5.2.1 on page 4-16). If this value seems
normal, verify whether the value of the alarm set point is adequate. This parameter
was probably set to a value that is too high.
3. Verify whether the breathing membrane of the H201T i ’s enclosure (item 4 in
Figure 2-1 on page 2-3) and/or the one of the Hydran 201 sensor (see Figure 2-3 on
page 2-6) are obstructed by paint, grease or other products.
4. Verify whether the valve on which the H201T i is installed is open.
5. Execute the ForceSensor Test command in the Service submenu to test the operation
of the H201 sensor. A problem may have occurred since the last automatic sensor test
(which is performed the first and fifteenth days of each month at midnight).
12.1.8 DayTrend LL
• Alarm type : Fail alarm
• Non-abbreviated description : Daily trend Low-Low
• Priority : Medium
• Parameter(s) involved :
– DayTrend LL ; SysOK Relay;FaultTrig. submenu; Section 4.5.7 on page 4-23
– DayTrAlr LL (alarm set point); Gas;DailyTrend submenu; Section 4.5.2.3 on
page 4-17
– DayTrAlr Delay ; Gas;DailyTrend submenu; Section 4.5.2.3 on page 4-17
• Alarm cause(s) : Daily trend below the DayTrAlr LL alarm set point. Probably indicates
a gas level reading problem.