
20
ICONS ON THE THC DISPLAYTROUBLE SHOOTING GUIDE
No Display
information.
Display reads
“Sensor O ”.
Controller is irrigating at
incorrect start time.
Controller is operating
properly but valve or
valves do not activate.
Check AC Power Supply,
power at the controller
should be 24-26 VAC.
Check AC wiring. Check
power at wall plug.
Check Programming,
Day, Time, AM-PM.
Start Times and Active
Day.
Check both station and
common wiring and
connections between
controller and valves.
Check for 24 VAC at
valve solenoid.
Slide Rain Sensor switch
to “o ” or install a sensor
jumper wire on terminal
strip connecting “RS”
and “RS” terminals.
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