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
500W or 4.4 ampere
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
