What does Alarm Low AL.L1 AL.L2 AL.L3 AL.L4 mean on Watlow Controller?
- XxlopezSep 7, 2025
If your Watlow Controller displays an 'Alarm Low AL.L1 AL.L2 AL.L3 AL.L4' error, it could indicate: * The temperature is less than the alarm set point; check the cause of the under temperature. * The alarm is set to latching and an alarm occurred in the past; clear the latched alarm. * The alarm set point is incorrect; establish the correct alarm set point. * The alarm source is incorrect; set the alarm source to the proper setting.










