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Troubleshooting
34 900-0020-01-00 Rev A
Table 2 Troubleshooting
Symptom Possible Cause Possible Remedy
No AC input. Check the AC voltage on the inverter’s input test points. (See
page 33.) If not present, the problem is external. If present, the
inverter could be damaged. Contact OutBack Technical Support
(see inside front cover of this manual).
AC input not connected on
both L1 and L2.
Check the AC voltage on the inverter’s input test points. (See
page 33.) Both L1 and L2 must have voltage. The inverter will not
accept an input from only one leg.
AC source is not 120/240 Vac
split-phase, or the AC source
neutral is not connected to the
inverter.
Confirm the nature of the AC source. Check the AC voltage
between L1, L2, and neutral on the inverter’s input test points.
(See page 33.) L1-neutral and L2-neutral voltages should be
120 Vac. L1-L2 voltage should be 240 Vac. Other voltages or
combinations, such as two phases of a three-phase source
(208 Vac), or 240 Vac without a neutral, will not be accepted.
Inverter’s L1 output has been
connected to its L2 input, or the
other way around. This
problem is accompanied by
shifts in frequency.
Disconnect the wires from the inverter’s AC input terminals or AC
output terminals, or both. If the problem immediately disappears,
it is an external wiring issue. The inverter’s input and output
terminals must remain isolated from each other.
AC source does not meet
requirements.
MATE3 system display only: Check the
Last AC Disconnect
screen
(using the
AC INPUT
hot key and the
Discon
selection) for the
reason for disconnection. If the unit never originally connected,
check the
Warning
menu (using the Inverter soft key from the
Home screen). Confirm source voltage and frequency.
AC source meets requirements
but is “noisy” or irregular.
MATE3 system display only: The
Generator
input mode can accept
irregular AC power. Select that mode for that input.
Inverter was manually set to
disconnect from AC.
MATE3 system display only: Change the AC Input Control setting
from
Drop
to
Use
with the
AC INPUT
hot key. (If this setting
was intentional, then no action is required.)
Grid use function has
disconnected from AC.
MATE3 system display only: If activated prematurely, check both
the MATE3’s
Grid Use Time
settings and the MATE3 clock settings
in the
System
menu. (If this setting was intentional, then no
action is required.)
High Battery Transfer (HBX)
mode has disconnected from
AC.
MATE3 system display only: Check the
AC INPUT
hot key screen
to see if HBX mode is in use. If activated prematurely, check the
settings of HBX mode. (If this setting was intentional, then no
action is required.)
Mini Grid
input mode has
disconnected from AC.
MATE3 system display only: Check the
Inverter
part of the
Settings
menu to see if
Mini Grid
mode is in use. If activated prematurely,
check the settings of
Mini Grid
mode. (If this setting was
intentional, then no action is required.)
Offset function has caused the
inverter to disconnect from AC.
(
Support
,
Backup
,
UPS
, and
Mini Grid
input modes.)
The Offset function sends excess renewable energy to the loads
to augment the AC source. If more renewable energy is produced
than the loads can consume, the AC source is judged unnecessary
and the inverter disconnects from it. (See page 19.)
Will not connect to
the AC source.
Conflicting programming. MATE3 system display only: Check to see if more than one of the
following are enabled:
Mini Grid
, HBX, Grid Use Time. These have
conflicting priorities and only one can be used at a time.