Morningstar ProStar MPPT Manual

Troubleshooting60

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 fault must be cleared

by removing and re-applying power.

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 con-

nected, and the LEDs will not indicate a fault. A metered

model, an RM-1 meter, or MSView PC software