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12
LED Error Behavior
LED Indicators
Error
Code
Screen
LED Color
RED
BLUE
RED
ORANGE
GREEN
GREEN
Solar good,
BV < 3V
ON
OFF
FLASH
OFF
OFF
OFF
‘b01’
FLASH
Solar good
battery reversed
ON
OFF
FLASH
OFF
OFF
OFF
‘b02’
FLASH
Solar good,
battery over-voltage
ON
OFF
FLASH
FLASH
FLASH
OFF
‘b03’
FLASH
Solar off,
battery over-voltage
OFF
OFF
FLASH
FLASH
FLASH
OFF
‘b03’
FLASH
Solar good,
battery over 65⁰C
ON
OFF
FLASH
FLASH
FLASH
OFF
‘b04’
FLASH
Battery good,
solar reversed
FLASH
OFF
According to BV
OFF
‘PO1’
FLASH
Battery good, solar over-
voltage
FLASH
OFF
OFF
‘PO2’
FLASH
Over Temperature
Protection
‘otP’
FLASH
System Status Troubleshooting
Description
Troubleshoot
Battery over voltage
Use a multi-meter to check the voltage of the battery. Make
sure the battery voltage is not exceeding the rated
specification of the charge controller. Disconnect battery.
Charge controller does not
charge during daytime when
the sun is shining on the
solar panels.
Confirm that there is a tight and correct connection from the
battery bank to the charge controller and the solar panels to
the charge controller. Use a multi-meter to check if the polarity
of the solar modules has been reversed on the charge
controller’s solar terminals.
Everything is connected
correctly, but the LCD on the
controller does not turn on
Check the rated battery voltage. The LCD will not display on
the charge controller unless there is at least 9V coming from
the battery bank.
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