5.0
Operation
56
GenStar MPPT
57
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.
High Heatsink Temperature
Status LED: Flashing red. Battery status LEDs: R-Y
sequencing. The heatsink temperature has exceeded safe limits and the load is disconnected. The
load will automatically reconnect when the heatsink cools to a safe temperature.
High Solar Voltage Disconnect
Status LED: None. Battery Status LEDs: R-Y-G. If the solar input open-circuit voltage (Voc) exceeds
the 185 Volt maximum rating, the array will remain disconnected until the Voc falls to 175V
Load High Voltage Disconnect (HVD) -
disabled by default
for
lead-acid presets
Status LED: None. Battery status LEDs: R-G sequencing. This fault is set when battery voltage is
above normal operating limits. The controller will disconnect the load output and set a Load High
Voltage Disconnect fault. This fault is designed to protect sensitive loads from excessive voltage.
Recovery occurs at HVD re-connect threshold, if programmed, and the fault will clear automatically.
Load Over-current
Status LED: Flashing red. Battery status LEDs: R/Y-G sequencing. If the load current exceeds the
maximum load current rating, the GenStar MPPT will disconnect the load. The greater the overload
the faster the load will be disconnected. A small overload could take a few minutes to disconnect.
The GenStar MPPT will attempt to reconnect the load two (2) times. Each attempt is approximately
10 seconds apart. If the overload remains after two (2) attempts, the load will remain disconnected
until power is removed and re-applied.
Load Short Circuit
State-of-charge LED sequence: R/G - Y (similar to load overcurrent is R/Y - G). The GenStar MPPT
will attempt to reconnect the load two (2) times. Each attempt is approximately 10 seconds apart.
If the overload remains after two (2) attempts, the load will remain disconnected until power is
removed and re-applied.
Remote Temperature Sensor (RTS)
Status LED: Flashing red. Battery status LEDs: R/Y - G/Y sequencing. A bad RTS connection or a
severed RTS wire has disconnected the temperature sensor during charging. See Tables 3.3 and 3.4
in Section 3 for RTS Start-up and Run-time operation and issues.
High Battery Voltage Disconnect (HVD)
Status LED: Flashing red. Battery status LEDs: R-G sequencing. This fault is set when battery
voltage is above normal operating limits. The controller will disconnect the solar input and set a
Solar High Voltage Disconnect fault. This fault is commonly caused by other charging sources in the
system, charging the battery above the GenStar MPPT regulation voltage. Recovery occurs at HVD
re-connect threshold, and the fault will clear automatically.
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. the table below lists a few
common critical faults. See local
meter display (Status Menu) for specific error. Contact an authorized
Morningstar dealer for support.
Charging Status
LED
1
Fault
Battery SOC LEDs
Solid red
PV FET Short
R-Y-G sequencing
Solid red
Load FET Short
R-Y-G sequencing
Solid red
Load FET Open
R-Y-G sequencing
Solid red
Damaged heatsink
temperature sensor R-Y-G sequencing
Solid red
Software
R-Y-G sequencing
1
Solid
R
Charging Status LED ON with heartbeat blink OFF every five seconds is a critical fault that
generally requires service. See local
meter display (Status Menu) for specific error.
STAND-ALONE CHARGING STATUS LED INDICATIONS
Charging Status LED
CONDITION
OFF (with heartbeat ON
every 5 secs
Not charging
Green solid (with heart-
beat OFF every 5 secs
Charging
Momentary flashing red,
then solid red
1
Charger fault
1
1
See
meter unit display (refer to meter map for location) for specific error.
5.8 LiveView Menus
LiveView is Morningstar Web Pages served directly from the GenStar MPPT. The web pages closely
coincide with the GenStar MPPT meter layout and functions. Many LiveView pages are organized
into cards, which are rectangular areas that group commands, settings, and other information. Cards
can be rearranged or hidden to suit a user's application preferences.
