Chore-Tronics® 2 Control Troubleshooting
MT1843B
99
Equipment and Potentiometer Troubleshooting
Continued....
Pot outside limits alarm (external
pot).
A.) Potentiometer has not been
calibrated (especially new
installations).
B.) Potentiometer cable is wrap-
ping around the Main Curtain
cable.
C.) Limit switch(es) has been
moved on the Curtain
machine.
D.) Potentiometer not connected
to Control and/or bad connec-
tion between Potentiometer
and Control.
E.) Bad Potentiometer.
A.) Go to the Setup screen and
scroll down to the Main Cur-
tain calibration to set up the
open and close limits of the
Curtain.
B.) Unwrap Potentiometer cable
from main cable. Consider
installing Anti-twist balls to
keep Potentiometer cable
from wrapping, or possibly
change how the pot cable
attaches to the main cable.
C.) If limit switches have been
moved, then re-calibration is
required.
D.) Connect Potentiometer to the
Control and/or look for bad
connection and correct.
E.) Replace Potentiometer.
Pot reading is not stable (changing
more than 3 counts when the Cur-
tain machine is not running).
A.) Did not use Twisted Pair Wire.
B.) Ran Potentiometer wire close
to, or in same conduit with
high voltage lines.
A.) Make sure that the wire used
to connect the Potentiometer
to the Control is a twisted
pair unshielded wire.
B.) Keep Potentiometer and Tem-
perature Sensor wire away from
high voltage lines. When high
voltage lines must be crossed, be
sure to cross as close to 90
degrees as possible.