Troubleshooting Reference
975-0555-01-01 4–3
4
Fault LED: On
Buzzer: Beeping
every second.
Inverter is in
overvoltage
shutdown.
High input voltage Make sure the inverter is
connected to a 12 V battery.
Check the voltage regulation of
the charging system.
To reset: turn power switch off
then on again.
5
Fault LED: On
Buzzer: Beeping
every second.
Inverter is in
overload shutdown.
Load applied is above the
continuous operation
limit.
Reduce the load if continuous
operation is required.
To reset: turn power switch off
then on again.
6
Fault LED: On
Buzzer: Beeping
every second.
Inverter is in internal
over temperature
shutdown.
Ambient temperature is
too high.
Load applied is above the
continuous operation
limit.
Reduce the ambient
temperature.
Reduce the load if continuous
operation is required.
7
Fault LED: On
Buzzer: Beeping
every second.
Inverter is in short
circuit shutdown.
Inverter has short-
circuited.
Disconnect DC power to the
inverter. Have a qualified
electrician check the AC output
connections, wiring, and
appliances for indications of
short circuits.
To reset: turn inverter’s main
O
N/OFF switch to Off and then
On again.
8
Fault LED: On
Buzzer: Beeping
every second.
Inverter internal
problem.
Internal fuse blown. Internal fuse is not
user-replaceable. See the
Warranty section for eligibility.
8
N/A Low output voltage
(96 VAC–104 VAC)
You are using a voltmeter
that cannot accurately
read the RMS voltage of a
modified sine wave.
Use a true RMS reading
voltmeter such as the Fluke 87.
Table 4-1
Troubleshooting Reference
#
Error/Warning
Code on Display Problem Possible Cause Solution
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