15
STPi Controller Operation Manual
Troubleshooting
Watering Issues
Problem
Possible Cause
Possible Solution
Automatic and Manual
cycles do not begin
watering.
Water source not supplying water.
Make sure the main water line and all supply lines are open and operating properly.
Wires not properly connected.
Make sure all field wires and master valve/pump start relay wiring is connected properly.
Wires loose or cut; corroded connections.
Check field wiring for broken, cut, or “skinned” wires and replace if necessary. Check all wire
connections and replace with watertight splice connectors as needed.
Dial not set to AUTO position.
Make sure the dial is on AUTO position—not any other dial position.
If you have a Rain Sensor, it may be
activated.
You can either wait until the Rain Sensor dries out, or disconnect the Rain Sensor from the
yellow terminals on the Controller and replace it with a wire connecting the two yellow
terminals.
If you do not have a Rain Sensor, the wire
connecting the two yellow Rain Sensor
terminals may be damaged or missing.
Connect the two yellow Rain Sensor terminals in the Controller’s terminal bay with a short
length of 14 to 18 gauge wire.
An electrical surge may have damaged
the Controller’s electronics.
Press the reset button under the wiring cover. If there is no permanent damage, the
Controller should resume normal operation. You will need to input the current time and
date, but your watering schedule should remain intact.
Electrical Issues
Problem
Possible Cause
Possible Solution
LCD Display is blank.
Transformer not plugged in or wall
socket not supplying power (Red light on
the transformer is not illuminated).
Make sure the two-prong connector is connected and the transformer is securely plugged in.
Make sure the main AC power supply is working properly.
LCD Display is “frozen”
and Controller will not
accept programming.
An electrical surge may have damaged
the Controller’s electronics.
Unplug the Controller for 3 minutes. Plug the Controller back in. If there is no permanent
damage, the Controller will accept programming and resume normal operation.
637418-01 Rev B (STP user manual) source.indd 15
3/7/2008 5:24:11 PM
