LeeBoy-Electric-Screed-Manual-986622-01-2009

Troubleshooting
Troubleshooting Chart
The troubleshooting chart below identifies the most common symptoms of failure. Use this chart to help identify the
failed component and possible remedies. If the problem persists, see your authorized LeeBoy Dealer.
Table 8-1. Troubleshooting Chart
SYMPTOM CAUSE REMEDY
Screed heating system will not
operate at all.
Screed heats, but one screed
section does not.
When starting the heat system, it will
not stay running long, or at all.
Screed is heating, but never gets hot
enough to pave.
Heating system seems to be
working, but the light isn’t on.
Elements have been tested but the
breaker still trips.
Control box power switch not in ON
position.
Main breaker is in tripped position
Element breakers are in tripped
position
Engine not operating at proper
throttle.
Generator malfunction.
Screed section not plugged into
bottom of control box out puts.
Element breakers for screed section
in a tripped condition.
Faulty element relay.
Heat system timed out.
Engine not operating at proper
throttle.
Elements improperly clamped.
Generator malfunction.
HEAT ON light is burned out.
Faulty element wiring.
Faulty breaker.
Ensure that the screed control box
power switch is in ON position.
Ensure main breaker is in the “set”
position (Figure 6-11, 2).
Ensure all element breakers are in
their “set” position with no breakers
showing a tripped condition (Figure
6-13, 2).
Ensure the paver is running. Set the
throttle on paver to full engine rpm.
NOTE: Throttle positions less than
full will still produce screed
heat, but at a reduced rate
and temperature.
See generator voltage testing.
Ensure the screed not heating
is plugged into the bottom of the
control box out puts.
Ensure the element breakers for that
screed section are not tripped.
See Testing element relays, or
Testing element resistance.
Check System Timer.
Ensure the paver is running. Set the
throttle on paver to full engine rpm.
NOTE: Throttle positions less than
full will still produce screed
heat, but at a reduced rate
and temperature.
Go over proper element installation
procedures, and ensure elements
are clamped properly.
See Generator speed tuning.
See Generator voltage testing.
Replace the HEAT ON light.
Test or inspect element wiring.
Replace defective breaker.
8-2 LeeBoy Model Legend Electric Screed System