Perform step 1 in Section 13.1.13 above, and then steps 2 to 5 in Section 13.1.5.
13.1.15 HourTrend L
• Alarm type: Fail alarm
• Non-abbreviated description: Hourly trend Low
• Priority: Medium
• Parameter(s) involved:
- HourTrend L; SysOK Relay;FaultTrig. submenu; Section 5.5.7
- HourTrAlr L (alarm set point); Gas;HourlyTrend submenu; Section 5.5.2.2
- HourTrAlr Delay; Gas;HourlyTrend submenu; Section 5.5.2.2
• Alarm cause(s): Hourly trend below the HourTrAlr L alarm set point. Probably
indicates a gas level reading problem.
Proceed as follows:
1. Verify the hourly trend calculated by the Hydran 201Ti. This value is displayed in
the Main Display mode (see Section 5.2.2) and also in the HourlyTrend screen in
the Gas;HourlyTrend submenu (see Section 5.5.2.2). 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. Perform steps 2 to 5 in Section 13.1.7.
13.1.16 HourTrend LL
• Alarm type: Fail alarm
• Non-abbreviated description: Hourly trend Low-Low
• Priority: High
• Parameter(s) involved:
- HourTrend LL; SysOK Relay;FaultTrig. submenu; Section 5.5.7
- HourTrAlr LL (alarm set point); Gas;HourlyTrend submenu; Section 5.5.2.2
- HourTrAlr Delay; Gas;HourlyTrend submenu; Section 5.5.2.2
• Alarm cause(s): Hourly trend below the HourTrAlr LL alarm set point.
Probably indicates a gas level reading problem.
Perform step 1 in Section 13.1.15, and then steps 2 to 5 in Section 13.1.7.
13.1.17 Replace SensNOW
• Alarm type: Fail alarm
• Non-abbreviated description: Replace Hydran 201 sensor immediately
• Priority: Very high
• Parameter(s) involved:
- SensRep Now; SysOK Relay; FaultTrig. submenu; Section 5.5.7
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