Installation, Operation and Maintenance Manual
Page
43
of
100
P/N
LED Color
Operation Description
A/ACSX2
or
A/ACSX
Red
The Red
“TRIP ON”
LED indicates the current is below the
adjustable trip point. When the Red
“TRIP ON”
LED is lite, the fan(s)
are operating at a slower speed (i.e., drawing less current) than
normal operation and the “No Airflow Alarm” message will appear
on the controller alarm display.
NOTE: At very low monitored input currents the LEDs may not light.
A/ACSX2
Blue
The Blue LED indicates the current is above the adjustable trip
point. When the Blue
“TRIP OFF”
LED is lite, the fans are operating
in a normal current range and the “No Airflow Alarm” message will
disappear from the controller alarm display.
A/ACSX
Green
The Green
“TRIP OFF”
LED indicates the current is above the
adjustable trip point. When the Green
“TRIP OFF”
LED is lite, the
fan(s)
are operating in a normal current range and the “No Airflow
Alarm” message will disappear from the
controller alarm display.
5.
Use the small flat blade screwdriver to adjust the
“
TRIP ADJ
”
potentiometer clockwise until the Red
“
TRIP ON
”
LED lights. Continue to turn the potentiometer another half turn to make sure that the
setpoint is slightly lower than the required setpoint. In this example, 3.00VDC.
6.
After the above adjustment and the Return to Auto times out (after 300 seconds), the fan speed will
return to the original factory preset speed, the Green
“
TRIP OFF
”
LED will be lite and the
“No Airflow
Alarm”
message will disappear from the controller alarm display.
7.
The current sensing switch
is now set and will trigger a “No Airflow Alarm” if for some abnormal reason,
the fan current drops to an unusually low point.
