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IOM-181 | MODEL: ECOSYSTEM™ WITH XLT CONTROLLER | REV: C
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department: 281.491.2331
Viewing the Current Alarms
Figure 18: Current Alarms Screen
Table 4: Current Alarms
Analog Gas Flow
Can only be active if Analog mode is selected.
The controller will go into the selected fail mode when this alarm is active.
NOTE:
If this alarm is active, verify that a 4–20 mA signal is being received from the flow meter.
Pulse Gas Flow
Can only be active if Pulse mode is selected.
The controller will go into the selected fail mode when this alarm is active.
NOTE:
If this alarm is active, the pulse input cutoff time has expired. Verify that a pulse input is being
received from the flow meter. If this alarm is active when the controller is receiving pulse input from the
flow meter, Welker recommends increasing the pulse input cutoff time to prevent the alarm from
becoming active prematurely.
Constant Rate Mode
Can only be active if Constant Rate Mode is specified as the desired fail mode.
The controller will enter this gas flow fail mode when there is a gas flow signal loss.
Shutdown Mode
Can only be active if Shutdown Mode is specified as the desired fail mode.
The controller will enter this gas flow fail mode when there is a gas flow signal loss.
Fixed Mode
Can only be active if Fixed Mode is enabled and the Fixed Alarm Rate is set.
NOTE:
If this alarm is active, the Fixed Alarm Rate will be the assumed gas flow in the system and will
override any other input parameters. The Fixed Rate Alarm will not clear until Fixed Mode is disabled.
Analog Temperature
Can only be active if Transmitter is set as the RTD setup method.
NOTE:
If this alarm is active, verify that a 4–20 mA signal is being received from the temperature
transmitter. If this alarm is active, the system will use the manually entered temperature; therefore,
Welker recommends regularly updating the manual temperature value.
Analog Tank Level
Can only be active if an electronic level transmitter is used to track the odorant tank level and the
controller loses the 4–20 mA signal from the transmitter.
NOTE:
If this alarm is active, the controller will automatically switch to the odorant flow method to track
the odorant tank level. The controller will use the value of odorant in the tank and subtract the
appropriate volume each time the solenoid opens.
Tank Low Level
Active if the odorant tank level has dropped below the specified value.
NOTE:
This alarm will clear once the tank is filled with odorant or the alarm set point is lowered.
Odorant Overflow
Active if the flow switch signals the controller indicating gas is passing through it even though the
solenoid(s) should not be open.
NOTE:
If this alarm is active, it could be an indication that a solenoid is stuck open and that the system is
over-odorizing or that the flow switch is stuck open.
Odorant No Flow
Active if the controller signals the solenoid to open but does not receive a signal from the flow switch
confirming the solenoid has opened.
NOTE:
If this alarm is active, it could be an indication that the solenoid has failed closed or that the
pressure differential across the system is not great enough to odorize.
