CIRCUTOR AFQ Series - Manual (Page 54)

AFQ-4W
54 Instruction Manual
Low temperature Alarm:
This alarm is activated to prevent the unit from starting when the temperature
inside the active filter is below 0ºC or when there is a problem in the connections
of the temperature probes.
This option is enabled by default and it is recommended not to
disable it.
Resonance Alarm:
The resonance alarm protects the unit against possible resonating currents
between the AFQ-4W and the load. This alarm is tripped when the level of a
harmonic in the load current rises considerably.
This option is enabled by default and it is recommended not to
disable it.
Before disabling the resonance alarm, it is essential to make sure
there is no resonating current between the active filter and the load.
Resonating currents can damage the active filter and other devices
connected to the installation.