5.0
Troubleshooting
ProStar MPPT Operator’s Manual
63
62
Solar Over-current
Error status LED: Flashing red. Battery status LEDs: R/Y-G
sequencing. When the ProStar’s rated input current is
exceeded, the unit will interrupt array current until cur-
rent falls below the maximum capacity.
While rare, if array current exceeds approximately 130% of
the controller’s output current rating, this fault can occur.
The fault is generally related to fast, large battery voltage
transients (connecting a very heavy or capacitive load like
an inverter) that are faster than the controller can regulate,
and it shuts off to protect the circuitry. The controller will
automatically re-start in 10 seconds.
Settings (DIP) Switch Changed
Error status LED: Flashing red. Battery status LEDs: R-Y-G
sequencing.
If a settings switch is changed while there is
power to the controller, the LEDs will begin sequencing and
the solar input will disconnect. The controller must be re-
started to clear the fault and begin operation with the new
settings.
Custom Settings Edit
Error status LED: Flashing red. Battery status LEDs: R-Y-G
sequencing.
A value has been modified in custom settings memory.
The controller will stop charging and indicate a fault condi-
tion. After all settings have been modified, the controller
must be reset by removing and then restoring power to the
controller. The new programmed settings will be used after
the power reset.
Firmware Update Failure
The firmware update was not successfully programmed. The
controller will not indicate the full power-up LED sequence
of G-Y-R when power to the controller is reset. Instead, the
controller will display green, and then stop on yellow. The
yellow LED will continue to be lit and the controller will not
complete start up or begin charging.
Re-try the firmware update. The firmware must be
successfully loaded before the controller will start up.
SOLID CHARGING STATUS LED with SELF-TEST (R-Y-G)
SOC FAULTS
Verify that nothing has been mis-wired. If not, the error is
likely critical. Contact an authorized Morningstar dealer for
support.
Fault
Charging Status LED
Battery SOC LEDs
PV FET Short
Solid red
R-Y-G sequencing
Load FET Short
Solid red
R-Y-G sequencing
Load FET Open
Solid red
R-Y-G sequencing
Damaged local
temperature sensor
Solid red (only if RTS
is invalid)
R-Y-G sequencing
Damaged heatsink
temperature sensor
Solid red
R-Y-G sequencing
Software
Solid red
R-Y-G sequencing
RE-SETTABLE
SELF-TEST (R-Y-G) SOC FAULTS
Fault
-
Battery SOC LEDs
Custom Settings Edit
-
R-Y-G sequencing
DIP Switch Change
-
R-Y-G sequencing
