Outback Power Systems GS7048E Operator's Manual page 57

Symptom Possible Cause
Inverter's output has been
connected to its input. Voltage
shifts are the result of trying to
match its own voltage.
Inverter clicks
repeatedly. AC Low AC input voltage. Can be
output voltage rises caused by weak AC source, or
or drops to unusual by faulty input connection.
levels with every
A generator is connected to the
click.
input terminals while the unit is
in the Grid Tied input mode.
Unit reads AC input, Internal transfer relay may be
even though no damaged. May be
source is present. accompanied by AC Relay Fault
error and shutdown.
False reading due to noise.
Inverter output is being
supplied with an external AC
Inverter hums loudly.
source that is out of phase.
System display may
show messages for
high battery voltage,
Inverter has been incorrectly
low battery voltage,
stacked with another unit on
or backfeed error.
the same output. All units
come defaulted as master.
AUX output is not connected.
Generator, external
fan, etc. fails to start
when signal is
provided by AUX Wrong AUX terminals have
output. been programmed.
Wrong AUX terminals are in use. If generator or external device requires 12 Vdc, confirm the 12V
5 See inside front cover of this manual.
900-0145-01-01 Rev A
Table 6 Troubleshooting
Possible Remedy
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 IN and AC OUT must
remain isolated from each other.
Test AC hot and neutral input test points with an AC voltmeter.
(See page 51.) If low or fluctuating, this is an external problem.
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.
Disconnect AC input wires and turn inverter on. Test the AC input
and neutral test points with an AC voltmeter. (See page 51.) If
voltage appears there, the transfer relay may be jammed. Contact
OutBack Technical Support.
occurs, it will likely occur on only the Grid or Gen input — not
both.
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.
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.
Check HUB ports and make certain the master inverter is plugged
into port 1.
MATE3 system display only: Check stacking settings in the Inverter
Stacking menu. Only one master is allowed per system.
Test the generator or device to confirm functionality. Test the
appropriate AUX terminals with a DVM. (If the RELAY AUX
terminals are in use, test for continuity. If the 12V AUX 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 AUX
circuit may be damaged. Contact OutBack Technical Support.
MATE3 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 AUX terminals. The Auxiliary
Relay menu programs the RELAY AUX terminals.
AUX terminals have been connected. The RELAY AUX terminals
do not provide voltage.
Troubleshooting
5 This problem is not common. If this
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