13
Troubleshooting
Error Detection
The ESP-RZXe controller has a built-in error detection that
senses a electrical short circuit or overload condition on a
Zone’s output line.
In the event of an error condition, the following steps
take place regarding the error:
The aected Zone number and “Err” alert message will
show on the display when the unit is in either AUTO or
MANUAL WATERING mode.
Watering Issues
Problem Possible Cause Possible Solution
Programmed schedules
and manual watering
functions do not start.
Water source not supplying water. Verify there is no disruption to the main water line
and that all other water supply lines are open and
functioning properly.
Wiring is loose or not properly
connected.
Check that eld wiring and master valve or pump start
relay wiring is securely connected at the controller and
in the eld.
Field wires are corroded or
damaged.
Check eld wiring for damage and replace if necessary.
Check wiring connections and replace with watertight
splice connectors if needed.
Connected rain sensor may be
activated.
Let the rain sensor dry out or else disconnect it from the
controller terminal block and replace it with a jumper
wire connecting the two SENS terminals.
Jumper wire connecting the two
SENS terminals on the terminal
block may be missing or damaged.
Jumper the two SENS terminals on the controller
terminal block by connecting them with a short length
of 14 to 18 gauge wire.
Electrical Issues
Problem Possible Cause Possible Solution
Display is blank. Power not reaching the controller. Verify the main AC power supply is securely plugged in
or connected and working properly.
Display is frozen and
controller will not accept
programming.
An electrical surge may have
interferred with the controller’s
electronics.
Unplug the controller for 2 minutes, then plug it back in.
If there is no permanent damage, the controller should
accept programming and resume normal operation.
All irrigation for the aected Zone is cancelled and
watering advances to the next operable Zone in the
irrigation queue.
NOTE: The controller will attempt to water the
aected Zone again at the next scheduled watering.
Completion of a successful watering will clear the
error condition associated with that Zone.
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