©
2015 Sensata Technologies
33
4.0 Troubleshooting
Problem
Possible Cause/
Condition
Solution
The GFCI outlet
trips as soon
as the load
is connected
to either L2/
N2 AC Output
terminals or
into the GFCI
outlet.
There is a neutral-to-
ground bonding in the
load side.
Locate and remove the
neutral-to-ground bonding on
the AC load side. If the output
of the inverter is connected to
an existing distribution panel/
box, make sure the neutral-
to-ground connections inside
the panel/box use separate
bus bars—the neutral one
is isolated from the chassis
ground. Otherwise, consider
using the AC 1 (L1/N1)
Output.
The input
battery under-
voltage warning
(E05) and/or
shutdown alarm
(E01) occurs
in advance
even when the
battery voltage
seems to be
OK.
Make sure you are
measuring the voltage
directly at the DC
Input terminals of
the unit—check the
possible voltage drop
between the battery
posts and the unit’s
input terminals.
Excessive voltage drop
between the battery bank
and the inverter may be due
to high resistance of the DC
wires, the battery disconnect
switch is turned off, or a faulty
fuse/DC breaker. Make sure
to use the recommended wire
gauge and length. Try to use
fuses (or DC breakers) with
very low voltage drop (e.g.,
ANL type fuses, etc.).
Battery bank with high
internal resistance,
resulting in a voltage
drop proportional to
the DC current draw
from the unit.
Too much battery voltage
drop due to an excessive
draw of current in relation
to the battery bank capacity.
Increase the battery bank
capacity (i.e., add more
batteries in parallel) and/or
reduce the load being fed by
the inverter.
Battery damaged and not
able to keep a good state of
charge. Replace the battery
(or batteries).
Battery bank is
getting discharged.
This is a normal condition. An
E05 warning followed by an
E01 shutdown occurs while
the battery bank is getting
discharged. Charge the
battery bank.