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ESP-LXD 2-Wire Decoder Control System Installation & Troubleshooting Guide
Troubleshooting
Category
Issue
Potential Cause
Solution
Master
Valves
The Master Valve will not
open when stations are
operating.
Decoder or valve wires are not
spliced correctly.
Turn dial to Test All Stations / Check System and select
2-Wire Diagnostics. Select Ping Decoders, MV Decoder
and ping the MV Decoder address. If the ping test fails
check the decoder and valve wire splices and repeat the
ping test.
Decoder is not functioning or
damaged.
Turn dial to Test All Stations / Check System and select
2-Wire Diagnostics. Select Ping Decoders, MV Decoder
and ping the MV Decoder address. If the ping test fails
swap the Decoder, enter the new Decoder address and
repeat the ping test.
ESPLXD-M50
Decoder
Module
No output from the
ESPLXD-M50 Decoder
Module.
Fuses in the decoder module
have blown due to short or
secondary power connected
to the 2-wire path.
Find the source of the short or power connected to
the 2-wire path and address the problem. ESP-LXD
controllers with date codes of September 2013 or
earlier have replaceable fuses. Contact Rain Bird for
replacement fuses for this version of the module.
Module is in Automatic Short
Finding Mode due to short or
secondary power connected
to the 2-wire path.
Find the source of the short or power connected to the
2-wire path and address the problem. Controllers with
date codes of October 2013 or later have self resetting
fuses. These modules should have normal output once
the 2-wire path issue is fixed.
Pump Start
Relays
The controller cannot
close the pump start
relay that is connected to
a Decoder.
Amp draw of the pump
start relay is more than the
Decoder can provide.
Use a Rain Bird PSR-Series Pump Start Relay that
incorporates an ice-cube relay, double relay system.
You can also add an ice-cube relay to the existing
pump start relay. Contact Rain Bird Technical Services
or Global Support Plan for relay model and wiring
diagram.
Controller
LCD Display
The controller display is
either too light or too
dark.
The display contrast needs to
be adjusted.
Turn dial to Off, press Co/- buttons to adjust
display contrast.
Controller display is
blank.
Controller LCD display is
damaged.
Plug in a 9V battery into the battery slot on the back
of the controller front panel. If information is now
visible on the display it is not damaged and working
correctly. See other potential causes. If no information
is displayed, remove the decoder module. If the alarm
light on the front panel turns on after 1 minute but no
information is in the display, the LCD is damaged and
the front panel should be replaced.
Primary power to the
controller has been lost or
turned off.
This can be verified by checking the status lights on the
decoder module. If both status lights on the module
are dark the primary power is likely off. Find primary
power source to the controller and turn it on. If the
power breaker is tripped or fuse is blown, find source of
problem, fix the issue, and turn the power back on.
Controller ribbon cable is not
connected or damaged.
Check to make sure the ribbon cable is securely
connected to both the controller backplane and the
front panel. If the cable has broken wires or connectors,
replace it.
