Solar panel is disconnected
Check if connection of solar input is right and
contact is reliable.
1. Battery voltage is less then 8V
2. Voltage of solar panel is less than
battery voltage
1. Check battery voltage. Controller will start only
battery voltage is more than 8V
2. Voltage of solar panel must be more than battery
voltage.
Load Output is turned off automatically and recovers
when battery electricity is enough
Overvoltage of storage battery
Please check whether the battery voltage exceeds
the voltage and reconnect the solar panel
Reduce load or check load connection
Make the controller cool down and restart charging
automatically
Charging current of solar panel is too
large
Check power of solar panel and reduce quantities of
solar panel in parallel; Restart after 2 minutes
The Controller display LVD
The battery is over discharge, check the system
designs reasonable or not, there is discharging
capacity more than charging capacity.
The Controller display HWO
The voltage of battery is high, cut off the solar panel
and see if the voltage drop down normal, if the fault
still exist, then cut off the battery and reconnect it
again.
The controller display OCP Over current
protection
The load is short circuit or over load or high surge
power check the load cables have short circuit, the
power of the load over rated design, the surge
power of load too high