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6.2 Troubleshooting Guide
Problem and Symptoms
Possible Cause
Solution
Low output voltage
Using average reading
Use true RMS reading meter.
(96 VAC to 104 VAC)
voltmeter
See section 2.2 of manual
Low output voltage and
Overload
Reduce load.
current indicator in red zone.
No output voltage and voltage
Low input voltage
Recharge battery, check
indicator in lower red zone
connections and cable.
No output voltage, no voltage
Inverter switched off
Turn inverter on.
indication.
No power to inverter
Check wiring to inverter.
Internal fuse open
Have qualified service
technician check and replace.
Reverse DC polarity
Have qualified service
technician check and replace
fuse, OBSERVE CORRECT
POLARITY.
No output voltage, voltage
High input voltage.
Make sure that PROwatt is
indicator in upper red zone.
connected to 12V battery (24V
for PW1500/24), check regulation
of charging system.
Low battery alarm on all the
Poor DC wiring, poor
Use proper cable and make
time, voltage indicator below
battery condition
solid connections, Use new
11 V (22V for PW1500/24)
battery.
No output voltage, OVERTEMP
Thermal shutdown
Allow PROwatt to cool off.
indicator on, load in excess of
Reduce load if continuous
1500 watts/150 ampere input
operation required.
CURRENT (or 75A for
PW1500/24).
No output voltage, OVERTEMP
Thermal shutdown
Improve ventilation, make sure
indicator on, load less than 1500
ventilation openings in
watts/150 ampere input current
PROwatt aren't obstructed,
(or 75A for PW1500/24).
reduce ambient temperature.
No output voltage, OVERLOAD
Short circuit or wiring
Check AC wiring for short
indicator on.
error.
circuit, improper polarity
(hot and neutral reversed),
or another AC power source
Very high power load
Remove load.
