Turn off LDI wire path slide
switches. Cycle LDI Power Switch
from OFF to ON.
Turn on each wire path one at a
time. After 10 seconds, verify no
“Flicker” on Field LED.
If visible on Field LED, open
Decoder Diagnostics window in
central control software.
Activate 50/60Hz mode test.
The wire with the higher
draw will have leakage.
Choose point halfway
between measurement point
and end of wire path. Retest.
Repeat this method to narrow
down location of damaged
insulation and leakage to
ground. Repair as necessary.
Verify “at rest” current draw.
Using a clampmeter, at the
downstream (field) side of the
mSP-1, compare the mA draw
of RED and BLACK wires.
Choose point halfway
between measurement point
and central control. Retest.
when repairs are complete,
verify “at rest” current draw
matches expected current draw.
Run ON/OFF test to validate
system operation.
At LDI, disconnect wire with lower
draw and choose point halfway
to end of wire path. measure
draw in connected (active) wire.
Disconnect any critical path loops
before testing.
Severity of Ground Fault
can vary based on soil
moisture content.
START
Visually check Field LED on
LDI/SDI for clean alteration
from RED to GREEN at
0.5 second intervals.
Recommended Rain Bird
®
Troubleshooting Procedure for
“Suspected Ground Fault”
(Leakage to Ground)
Symptoms:
Lower run times or zeros
in the course log. Fluctuating current
reported in Decoder Diagnostics. No
clean alternating color in
Field LED on LDI/SDI.
NOT CLEAN
CLEAN
FLICKER
HIGH
Replace LDI
If wire Path is
Activated, Consider
Possibility of Ground
Fault on Path
No Further Action.
NOT CLEAN
DRAw CLOSE
TO ZERO
VALIDATED
DRAw GREATER
THAN ZERO
Normal systems should
expect “at rest” current
draw to fluctuate
between 2 mA – 5 mA.
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