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Problem /Symptom Possible Causes Solution
Low output voltage Using average Use true RMS
on voltmeter reading meter reading
(96 VAC to 104 VAC)
Low output voltage Overload Reduce the
and current indicator load
in red zone
No output voltage Low input Recharge
and voltage voltage battery,
indicator in check
lower red zone connections
and cable
No output voltage, Inverter switched Turn inverter
no voltage Off,no power to On,check
indication inverter, wiring to
fuse open inverter.
Have qualified
service
technician
check and
replace
Reverse DC Observe
polarity correct
polarity
No output voltage High input voltage Make sure the
voltage indicator in inverter is
upper red zone connected to
12 V battery,
check regulation
of charging
system
16
Trouble-
shooting
Guide
Troubleshooting Guide
17
Problem /Symptom Possible Causes Solution
Low battery alarm on Poor DC wiring, Use proper cable,
all the time, poor battery make solid
voltage indicator condition connections,
below 11 V use new battery
No output voltage Thermal shutdown
if load in excess of
1000W or 8.7 amperes
Maintenance
Maintenance
Allow inverter to
cool off
Reduce load,con-
tinuous operation
input current
required
Improve ventila-
tion;make sure
ventilation open-
ings in the inverter
aren’t obstructed.
Reduce ambient
temperature
Maintenance
Very little maintenance is required to keep the invert-
er operating properly.The exterior of the unit should
be cleaned periodically with a damp cloth to prevent
accumulation of dust and dirt. At the same time,
tighten the screws on the DC input terminals.Be sure
vents and fans are free of dust or debris.
No output voltage Short circuit Check AC
or wiring wiring for
error short circuit or
improper
polarity