How to Troubleshoot an HR6100 Sprinkler With no Power

Open the circuit breaker box front panel where the breaker associated with the HR 6100 is housed. Inspect the state of the breaker switch. If the switch is in the middle or "Off" position, then the breaker is tripped. Move the switch to the "On" position to restore power to the HR 6100.

Inspect the length of the transformer power cord for damage, such as dents, tears or frays. If the power cord is damaged, replace it. Unplug the HR 6100 plug from the power outlet to reset the connection, wait 10 seconds and plug it back in.

Open the HR 6100 bottom access cover to expose the wire terminals. The transformer connects to the unit with two wires. Insert a flat-head screwdriver into the two "T" terminals to the right side of the bottom panel and unscrew them. Remove the two transformer wires from the terminals and confirm that the tips are stripped of insulation at least a 1/2 inch. Wrap the non-insulated ends of the wire around the terminal and tighten the wires into the two "T" terminals with the flathead screwdriver.

Insert the flathead screwdriver into the "COM" terminal and unscrew it, if the valves receive no power. Pull the common or white wire from the terminal. The common wire connects all of the water valves together. Confirm that the end of the wire is stripped a 1/2 inch, wrap the metal part of the wire around the terminal screw and tighten the wire into the screw with the flathead screwdriver.

Twist the "Program" switch directly below the schedule dial on the front panel of the HR 6100 to "Run," if the unit receives power but the schedules aren't enforced. The unit won't operate, until the switch is set to "Run."

Move the "Auto/Off" switch to the left of the program switch to "Auto," if the unit fails to activate. If the switch is set to "Rain," the unit doesn't activate the valves or stations, as the system behaves as though it's raining outside and the sprinklers aren't needed.