Product Manual

Troubleshooting
900-0161-01-01 Rev B 47
Table 5 Troubleshooting
Symptom Possible Cause Possible Remedy
Low charge rate.
Charge complete or nearly
complete.
Check the DC voltage and charging stage using the system
display, if present. Confirm with DC voltmeter.
System display DC meter
reads significantly higher than
actual battery voltage.
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.
High output loads. 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.
High temperature. 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.
Will not sell power
to the utility grid.
Grid-tied function has been
manually disabled.
System display only:
Check the
Grid-Tie Enable
setting in
the
Grid-Tie Sell
menu. Confirm it is set to
Y
.
Grid Tied
mode not in use on
the appropriate input.
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.
AC source does not meet
requirements; this item is
usually accompanied by
disconnecting from the
utility grid when in
Grid Tied
mode.
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.
The inverter has other criteria
besides the AC source which
must be met, such as the
qualifying time.
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,
The inverter will perform the
Offset function before
attempting to sell.
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.
Reduced power
sold to the utility
grid.
AC source voltage is driven
high when the inverter sells
large amounts of power.
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.
High temperature. 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.
Inverter does not
perform the
Offset
function when
expected.
Incorrect input mode.
Offset
does not function in
Generator
,
UPS
, and
Backup
modes. (If this setting was intentional, then no action
is required.)
Specific mode only offsets
under particular conditions.
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.