_& Stra_on Service&Troubleshooting Guide - Home Generator Systems
'_ Model 1938 (lOkW) Troubleshooting
TROUBLESHOOTING LED FAULTS
Dead Unit / Low Battery Voltage:
(No Blink [ ] / One Blink [ • ])
A unit with a completely depleted starting battery will not
be capable of powering the Diagnostic LED (no blink). When
the generator cannot start because the battery output
power is below that needed to crank the engine, the
Diagnostic LED will have an indication (one blink). The
causes for either of these problems may be a failed battery,
a parasitic drain on the battery or a failed trickle charger.
The test and repair procedures for these three conditions
are outlined below.
I _E WARNING
before performing tests
Check Battery:
• Switch AUTO/OFF/MANUAL to OFF.
• Remove 15 Amp fuse.
• Disconnect battery cables.
Using the approved procedure for your battery tester,
check the state of charge.
• Recharge battery, if required, and retest.
If battery replacement is required, use current
BRIGGS & STRATTON recommended replacement part.
• Connect the battery cables.
• Reinstall the 15 Amp fuse.
Check Trickle Charging System:
NOTE: Depending on the state of charge of a
battery, a slight (+) current flow indicates that the
charging system is working. (.033 Amp for a fully
charged battery to .612 Amp for a depleted battery)
Follow the recomendations of your meter's instruction
manual.
• Install DC Amp meter between Negative (-) battery
terminal and Negative (-) battery cable.
•. If a (+) current flow is detected:
The trickle charge system is functioning.
• Connect Negative (-) battery cable.
• Reset the Fault Detection system
• Start unit.
•• If a zero or negative (-) Amp draw is detected:
Troubleshoot The Trickle Charging System:
NOTE: If the diode in the battery charge rectifier
shorts, it will drain the battery to ground.
Symptom: The battery charge resistor is warm,
even when the unit isn't or hasn't been running.
• Repair and/or replace defective wiring or components.
l CAUTION: Do not allow disconnectedcables I
to come in contact with ground during these tests. I
• Remove 15 Amp fuse.
• Remove the (-) battery cable.
• Replace 15 Amp fuse.
With (+) battery cable removed, select AUTO at the
AUTO/OFF/MANUAL switch.
• Measure for DC voltage at Pin #12, Wire #15, at the
CMA and Ground (Figure 13).
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