Hit Products HDC Controller - Manual (Page 20)

20
ICONS ON THE THC DISPLAY TROUBLE SHOOTING GUIDE
No Display
information.
Display reads
“Sensor Off”.
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 “off” or install a sensor
jumper wire on terminal
strip connecting “RS”
and “RS” terminals.