5.0
Troubleshooting
ProStar MPPT Operator’s Manual
61
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disconnected. A small overload could take a few minutes to
disconnect. The ProStar 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.
Solar Short Circuit
Charging Status LED: OFF. Solar input power wires are
short-circuited. Charging automatically resumes when the
short is cleared.
Battery Reverse Polarity
No LED indication, the unit is not powered. No damage to
the controller will result. Correct the miswire to resume
normal operation.
Load Short Circuit
Error status LED: Flashing red. Battery status LEDs: R/G-Y
sequencing. Fully protected against load wiring short-
circuits. After two (2) automatic load reconnect attempts (10
seconds between each attempt) the ProStar MPPT will wait,
and then automatically reconnect the load, once the short is
cleared.
High Solar Voltage Disconnect
Charging Status LED: R flashing. No battery status errors.
If the solar input open-circuit voltage (Voc) exceeds the 120
volt maximum rating, the array will remain disconnected
until the Voc falls safely below the maximum rating.
Remote Temperature Sensor (RTS)
Error 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. Charging automatically resumes when the
problem is fixed. To resume operation without an RTS,
disconnect all power to the ProStar MPPT and then
reconnect. If the controller is re-started with the failure
still present, the controller may not detect that the RTS is
connected, and the LEDs will not indicate a fault.
A metered model, an RM-1 meter, or MSView PC software
can be used to determine if the RTS is working properly.
Battery Sense Cables Issue
Error status LED: Flashing red. Battery status LEDs:
R/Y - G/Y sequencing. If a fault in the battery sense
connection (such as a short-circuit, open circuit or loose
terminal) occurs after the battery sense has been working,
the LEDs will indicate a failure. To resume operation without
battery sense cables, disconnect all power to the ProStar
MPPT and then re-connect. If the controller is re-started
with the failure still present, the controller may not detect
that the battery sense is connected, and the LEDs will not
indicate a fault. An RM-1 meter, or MSView PC software,
can be used to determine if the battery sense is working
properly.
Battery / Load High Voltage Disconnect (HVD)
Error 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 High Voltage Disconnect fault. This
fault is commonly caused by other charging sources in the
system, charging the battery above the ProStar MPPT regu-
lation voltage. Recovery occurs at HVD re-connect thresh-
old, and the fault will automatically clear. See Section 7 -
Technical Specifications for values.
High Heatsink Temperature
Error 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 automati-
cally reconnect when the heatsink cools to a safe
temperature.
