Evaporator Flow Loss
Alarm description (as shown on screen): Evap Water Flow Loss
Trigger:
1: Evaporator Pump State = Run AND Evaporator Flow Digital Input = No Flow
for time > Flow Proof Set Point AND at least one compressor running
38 KOMAC00607-09EN
2: Evaporator Pump State = Start for time greater than Recirc Timeout Set Point
and all pumps have been tried
Action Taken: Rapid stop all circuits
Reset:
This alarm can be cleared at any time manually via the keypad or via the BAS clear
alarm signal.
If active via trigger condition 1:
When the alarm occurs due to this trigger, it can auto reset the first two times each
day, with the third occurrence being manual reset.
For the auto reset occurrences, the alarm will reset automatically when the
evaporator state is Run again. This means the alarm stays active while the unit
waits for flow, then it goes through the recirculation process after flow is detected.
Once the recirculation is complete, the evaporator goes to the Run state which will
clear the alarm. After three occurrences, the count of occurrences is reset and the
cycle starts over if the manual reset flow loss alarm is cleared.
If active via trigger condition 2:
If the flow loss alarm has occurred due to this trigger, it is always a manual reset
alarm.