Alpha OutBack Power Radian Series Operator's Manual page 47

Symptom Possible Cause
Charge complete or nearly
complete.
System display DC meter
reads significantly higher than
actual battery voltage.
Low charge rate.
High output loads.
High temperature.
Grid-tied function has been
manually disabled.
Grid Tied mode not in use on
the appropriate input.
AC source does not meet
requirements; this item is
usually accompanied by
disconnecting from the
Will not sell power
utility grid when in Grid Tied
to the utility grid.
mode.
The inverter has other criteria
besides the AC source which
must be met, such as the
qualifying time.
The inverter will perform the
Offset function before
attempting to sell.
AC source voltage is driven
high when the inverter sells
large amounts of power.
Reduced power
sold to the utility
High temperature.
grid.
Incorrect input mode.
Inverter does not
perform the Offset
Specific mode only offsets
function when
under particular conditions.
expected.
900-0161-01-01 Rev B
Table 5 Troubleshooting
Possible Remedy
Check the DC voltage and charging stage using the system
display, if present. Confirm with DC voltmeter.
Check the DC voltage on the inverter's DC terminals. If
different from the system display reading, the inverter could
be damaged. Otherwise, check the DC voltage on batteries
with a voltmeter. If different from the reading on the inverter,
this could be a DC connection problem.
If total loads and charge exceed the AC input setting, charge
rate decreases to give priority to the loads. Turn off some of
the output loads and test the charge rate again.
The inverter will reduce the current rate for charging and other
activities if the internal temperature exceeds a certain level.
Check temperature and allow the inverter to cool if necessary.
(See page 53.) External cooling may also be applied.
System display only: Check the Grid-Tie Enable setting in
the Grid-Tie Sell menu. Confirm it is set to Y.
System display only: Check the Inverter part of the Settings
menu to see if Grid Tied mode is in use. Confirm that it has
been selected for the correct Radian input terminals.
Verify grid voltage and frequency. Determine if they are
within the inverter's approved limits. If not, the inverter is
operating correctly. Contact the utility company if necessary.
System display only: The program limits are found in the
inverter's Grid Interface Protection menu. See page 14 for
more information on this menu.
System display only: Check Sell Status screen using the
Home screen's soft keys. The inverter may be operating
correctly. Depending on the conditions which need to be met,
the delay may be temporary,
Output loads can consume all excess renewable power if they
are large enough. (The Offset function "sells to the loads.")
Turn off some output loads and observe the sell operation.
When the inverter senses a rise in grid voltage while selling, it
reduces the sell current, to avoid forcing the voltage to
unacceptable levels. Check AC input voltage while selling.
The inverter may be operating correctly.
The inverter will reduce the current rate for selling and other
activities if the internal temperature exceeds a certain level.
Check temperature and allow the inverter to cool if necessary.
(See page 53.) External cooling may also be applied.
Offset does not function in Generator, UPS, and Backup
modes. (If this setting was intentional, then no action
is required.)
Support mode will perform the Support function based on
load. This may appear as Offset without reaching the
reference voltage.
GridZero mode will perform Offset based on the DoD Volts
setting. Other reference voltages are not used.
Troubleshooting
47