Outback Power Systems GS4048A Operators Manual - Manual (Page 55)

Troubleshooting
900-0161-01-00 Rev A 53
Table 6 Troubleshooting
Symptom Possible Cause Possible Remedy
Loads sensitive to inverter’s
transfer time.
UPS mode not in
use on the appropriate input.
MATE3 system display only: Most of the inverter’s input modes
feature a small but noticeable response time during transfer.
Certain loads (such as highly sensitive computers) may not
respond well. The UPS input mode has a faster response time.
Select this mode for the appropriate input. (See page 17.)
Loads too large. The unit can transfer more power than it can invert. If loads are
oversized, the unit will falter or crash when switching to batteries.
Reduce the size of the loads.
Undersized battery cables. Battery cables smaller than recommended will cause a significant
voltage drop when switching to batteries, acting like either an
overload or a low-battery condition. Size all cables correctly.
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 49.) If
voltage appears there, the transfer relay may be jammed. Contact
OutBack Technical Support.
5 This problem is not common. If this
occurs, it is usually on only the Grid or Gen 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 IN and AC OUT 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 49.) 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.
MATE3 system display only: Check stacking settings in the
Inverter
Stacking menu. Only one master is allowed per system.
5 See inside front cover of this manual.