ESP-LXD 2-Wire Decoder Control System Installation & Troubleshooting Guide
33
Troubleshooting
Category
Issue
Potential Cause
Solution
Controller
Alarms
Controller alarm; Invalid
Module Config.
A non-compatible module has
been inserted into one of the
controller module slots.
Remove any recently added modules, one at a time,
until the alarm condition clears.
- ESP-LXME/-LXMEF Controller 4-, 8-, & 12-Station
Modules & FSM Flow Smart Modules are not
compatible.
Controller alarm; No PGM
will Auto Run.
Incomplete programming.
Turn dial to Test All Stations / Check System, select
Confirm Programs, Program Summary. Missing
programming parameters are identified by an N. For
programs to automatically run you need to program
Start Days, Start Times, and Station Run Times.
Controller Alarm; Missing
SM75.
75-Station Module has been
removed.
An ESPLXD-SM75 75-Station Module that was installed
in the ESP-LXD Controller has been removed. The
programming information for these stations has been
preserved. Reinstall a 75-Station Module to restore the
stations and programming supported by this expansion
module.
Controller Alarm; No
Power – Irrigation
Functions are Disabled.
No primary power to the
controller transformer
Check the power input to the controller transformer.
The display is being powered by the 9v backup battery.
Front panel ribbon cable is
disconnected
Check both ends of the ribbon cable to make sure it is
firmly connected to the backplane and front panel.
2-Wire Path
Issues
Communication with
2-wire devices is
intermittent.
2-wire cable or splices are
leaking to ground or between
conductors.
Turn dial to Test All Stations / Check System, select
2-Wire Diagnostics, 2-Wire Survey. The controller
voltage output and 2-wire path milliamp draw will be
displayed.
- If there are no issues you will see Current Limit OK,
Current Overload OK.
- If the 2-wire cable leaks are drawing a high amount
of current you will see Current Limit Not OK, Current
Overload OK. Use the troubleshooting tips above to
find and fix the 2-wire cable/splice issues.
- If the 2-wire cable leaks are drawing a high
amount of current you will see Current Limit Not OK,
Current Overload Not OK. The controller will have
automatically switched to Fault Finding Mode. Use the
troubleshooting tips above to find and fix the 2-wire
cable/splice issues.
Controller loses
connection to 2-wire
decoders after a heavy
irrigation or rainfall event.
Communication signal and
power leaks to ground.
Single-jacketed cable and/or incorrect wires splices
were used. When incorrect cable/splices become
submerged it can create leakage to ground. Double-
jacketed 14-2UF Maxi 2-Wire Cable and 3M DBR/Y-6
Wire Splice Kits are required.
