Product Manual
Troubleshooting
900-0161-01-01 Rev B 49
Table 5 Troubleshooting
Symptom Possible Cause Possible Remedy
Unit reads AC
input, even though
no source is
present.
Internal transfer relay may be
damaged. May be
accompanied by
AC Relay
Fault
error and shutdown.
Disconnect AC input wires and turn inverter on. Test the AC
input and neutral test points with an AC voltmeter. (See page
45.) If voltage appears there, the transfer relay may be
jammed. This problem is not common. If this occurs, it is
usually on only the
G
RID
or
G
EN
input — not both.
False reading due to noise. Electrical noise can cause false readings on the metering
circuits when no voltage is present. The readings are usually
less than 30 Vac. If this is the case, no action is required.
Inverter clicks
repeatedly. AC
output voltage
rises or drops to
unusual levels with
every click.
Inverter’s output has been
connected to its input.
Voltage shifts are the result of
trying to match its own
voltage.
Disconnect the wires from the inverter’s AC input or AC
output terminals, or both. If the problem immediately
disappears, it is an external wiring issue. The inverter’s
AC
I
N
and
AC
O
UT
must remain isolated from each other.
Low AC input voltage. Can
be caused by weak AC
source, or by faulty input
connection.
Test AC hot and neutral input test points with an AC
voltmeter. (See page 45.) If low or fluctuating, this is an
external problem.
A generator is connected to
the input terminals while the
unit is in the
Grid Tied
input
mode.
The inverter is not intended to sell power to a generator. The
selling activity will drive the generator voltage up to the
disconnection point. It will then reconnect to the generator
and try again. Change input modes, or move the generator to
an input with a different mode selected.
Inverter hums
loudly. System
display may show
messages for high
battery voltage,
low battery
voltage, or
backfeed error.
Inverter output is being fed
with an external AC source
that is out of phase.
Disconnect AC output wires. Turn the inverter off and then
on. If the problem clears, reconnect the AC output wires. If
the problem recurs when reconnected, an external AC source
is connected to the output.
Inverter has been incorrectly
stacked with another unit on
the same output. All units
come defaulted as master.
Check HUB ports and make certain the master inverter is
plugged into port 1.
System display only:
Check stacking settings in the
Inverter
Stacking
menu. Only one master is allowed per system.
Generator,
external fan, etc.
fails to start when
signal is provided
by
A
UX
output.
A
UX
output is not connected.
Test the generator or device to confirm functionality. Test the
appropriate
A
UX
terminals with a DVM. (If the
R
ELAY
A
UX
terminals are in use, test for continuity. If the
12V
A
UX
terminals are in use, test for 12 Vdc.) If the proper results are
present when the menu indicates the function is
On
(and the
device still does not work), then there is an external
connection problem. If the proper results are not present with
the function
On
, the
A
UX
circuit may be damaged.
Wrong
A
UX
terminals have
been programmed.
System display only:
Confirm that the AUX menu that was
programmed matches the terminals that are in use. The
Auxiliary Output
menu programs the
12V
A
UX
terminals.
The
Auxiliary Relay
menu programs the
R
ELAY
A
UX
terminals.
Wrong
A
UX
terminals are in
use.
If generator or external device requires 12 Vdc, confirm the
12V AUX terminals have been connected. The
R
ELAY
A
UX
terminals do not provide voltage.