Schneider Electric User Guide

Troubleshooting
4–6 975-0240-01-01
Inverter goes into
invert mode and starts
producing AC output
and then stops or
does not start at all.
Search Watts setting is too low or
high.
Potential problem loads for search
mode:
• Incandescent lights have a
higher starting wattage when the
filament is cold than the
continuous rating of the bulb.
• Fluorescent bulbs draw little
power until the mercury vapor
begins to conduct enough
current to light the tube.
• Other loads: Some appliances
draw power even when turned
off: TVs with instant-on circuits
and VCRs, for example.
If the search sensitivity is set higher than
the combined loads, then connect an
auxiliary load to bring the inverter out of
search mode before the appliances can
be turned on.
If the sensitivity is set lower than the
combination of the loads, the loads will
remain on and excess battery drain will
occur since the inverter won’t ever idle.
Another solution is to turn the item off at
the wall, use an extension cord with a
rocker switch, a switch at the outlet, or
an appropriate circuit breaker.
The utility grid is not
dropping out, but the
unit is disconnecting
from the grid.
The AC voltage or frequency
provided to the inverter input is
outside the AC Setting voltage or
frequency range.
Adjust the AC1 voltage and frequency
settings (see “AC Input Settings” on
page 3–24). Raise the high voltage and
frequency settings, and lower the low
voltage and frequency settings. If Grid
support is enabled, these limits are over-
ridden by the default anti-islanding AC
parameters.
The inverter connects
to the grid and can
charge normally. In a
grid interactive mode
(Grid Support
enabled), the unit is
experiencing
excessive
anti-islanding faults
during periods of high
sell amperage.
The impedance of the AC
connection to the inverter is too high
for the power being sold to the grid.
The impedance may be on the high
end if the installation is too far from
the utility point of common
connection or if the wires are too
small between the Conext XW+ and
the main service panel.
Measure the grid voltage at the service
panel (meter base). It is important to
measure L1-N, L2-N, L1-L2, and
N-Ground. If these measurements are
not within the voltage range for sell
mode (see Table A-1 on page A–2),
contact your utility for resolution. If these
measurements are within the voltage
range for sell mode (see Table A-1 on
page A–2), the most likely event is that
the AC wiring between the inverter and
the meter base is not sized
appropriately. It should be sized for a
1 to 1.5% maximum voltage drop.
Alternately, the Max Sell Amps can be
reduced until the unit stops
disconnecting.
Problem Possible cause Solution(s)
Conext XW+ Owner's Guide NA (975-0240-01-01).book Page 6 Monday, November 27, 2017 10:00 AM