Product Manual

Troubleshooting
60 900-0145-01-01 Rev B
Disconnect Messages
Disconnect messages explain why the inverter has disconnected from an AC source after previously
being connected. The unit returns to inverting mode if turned on. This screen is viewed using the
AC
INPUT
hot key on the MATE3. One or more messages will display
Y
(yes). If a message says
N
(no), it
is not the cause of the disconnection. The MATE3 system display may generate a concurrent event
and warning message following the disconnection. (See page 58.) If the AC source is removed, the
warning will be blank, but the cause of the last disconnection will remain.
Disconnect messages only display the reason for the disconnection; they cannot correct it. It is usually
the result of external conditions, not an inverter fault. If the condition is corrected, the inverter will
reconnect. A few settings can be changed to accommodate problems with the AC source.
The reasons shown in the Sell Status menu for ceasing to sell power (see next page) may be the same
as disconnect messages. If the Grid Interface Protection settings are exceeded (see page 12), the
inverter will disconnect from the utility grid.
Table 11 shows the primary seven reasons for disconnection. An eighth field may be visible, but it can
feature several different messages which vary with conditions. A list of these messages and their
definitions is featured on the OutBack website at www.outbackpower.com.
Table 11 Disconnect Troubleshooting
Message Definition Possible Remedy
Frequency Too High
The AC source has exceeded acceptable
frequency levels.
Check AC source. If it is a generator, reduce speed.
Frequency Too Lo
w
The AC source has dropped below
acceptable frequency levels.
Check AC source. If it is a generator, increase speed.
Voltage > Maximum
The AC source has exceeded acceptable
voltage levels.
Check AC source. The inverter’s acceptance range is
adjustable.
NOTE:
Adjusting the range may accommodate a
problematic AC source, but it will not fix it.
Voltage < Minimum
The AC source has dropped below
acceptable voltage levels.
Check AC source. The inverter’s acceptance range is
adjustable.
NOTE:
Adjusting the range may accommodate a
problematic AC source, but it will not fix it.
Backfee
d
Usually indicates that another AC power
source (out of phase with the inverter) was
connected to the AC output.
Can also occur if an out-of-phase AC source
is connected to the AC input.
Disconnect the AC OUT wires. Check the wires (not
the inverter) with an AC voltmeter. If an AC source is
present, shut it off. (This is more often accompanied
by an
AC Output Backfeed
error.)
Check input source and wiring. This can be caused by
a source with phase problems
Phase Lock
The unit cannot remain in phase with an
erratic AC source.
Check AC source. This can be caused by a generator
with a poorly regulated output. Some generators
perform this way when low on fuel. If necessary, use
the
Generator
input mode. (See page 13.)
Island Detec
t
The grid seems to be present but normal
grid conditions are not detected. This can
occur if the Radian’s input is powered by
another inverter instead of the grid. It may
be the result of an open main disconnect.
Check all input disconnects or circuit breakers for an
open circuit. Check for any other inverters installed in
the system and disable them.
This may (rarely) occur with a generator. If necessary,
use the
Generator
input mode. (See page 13.)