21
TROUBLESHOOTING
Symptom Possible Cause Remedy
Display is blank.
Mains power is not connected 
AND there is no 9V battery fitted 
(or it is flat).
Fit a 9V battery and check that 
the controller is plugged in 
to a power point and that it is 
switched on. Check that there is 
power to the power point.
Controller fuse has blown AND 
there is no 9V battery fitted (or 
it is flat).
Fit a 9V battery and check the 
fuse under the terminal cover.
LCD screen has over heated
The screen may go blank if the 
internal temperature exceeds 
50°C. If a consistent problem, 
suggest moving the unit to a 
cooler location
Fuse blows constantly
Short circuit in a solenoid valve 
or the wiring to it
Check the solenoid valve wiring 
and the solenoid valves for a 
short circuit.
Watering programs start at 
unscheduled times.
Watering programs have
overlapping start times.
Reduce station times.
Change/remove program start 
times.
A station does not turn on. Faulty wiring at station module.
Check valve wiring and
connections
Program starts again after 
completion of a watering cycle.
Watering programs have
overlapped.
Reduce station times.
Change/remove program start 
times.
Water budget setting may be 
greater than 100%.
Review water budget setting.