5
HOW THE ELECTRONIC CIRCUIT BREAKER WORKS
The controller is equipped with an electronic circuit breaker. If the controller detects a short
circuit, the shorted station (valve) will be turned off automatically. The display will then
fl ash “short” and the shorted station number or “master valve.” The controller continues
to automatically water the other stations and the following watering programs until the
shorted station is repaired. The program will be cancelled if the master valve circuit is
shorted. Each automatic start will attempt another cycle and retest the short-circuited
valve.
Listed below are the most common conditions which will activate the electronic circuit
breaker. After correcting the problem, return the controller to normal operation as follows:
1. Set the dial to one of the following positions: Run, Manual-Single Station or Manual-
Program Cycle.
2. Press the OFF button to return the controller to the normal operating mode.
Condition: The word “SHORT” displays with one or more station numbers.
Diagnosis:
One or more stations are shorted.
Solution: Check the wiring of the displayed stations for the cause
of the shorted condition. Repair valve(s) and/or wiring as
needed.
Diagnosis: Too many valves operating at the same time causing an
overload condition.
Solution: Check watering programs for concurrent station operation.
Include master valve/pump start relay if used. Maximum
total output is 24 V a.c. at 1.25 amps. Reduce the number of
stations running at the same time.
Condition: The word “SHORT” displays without any station numbers.
Diagnosis:
A short circuit has occurred with a time duration too short
for the controller to determine the station.
Solution: Check all valve wiring for breaks in the insulation which
may cause a station output to short to common.
Diagnosis: A transient power surge spike has occurred.
Solution: Reset the controller.
Diagnosis: A short or overload occurred on one watering cycle but was
no longer there on a subsequent cycle.
Solution: Check for loose and/or exposed valve wiring.
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