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5. Troubleshooting
Error
The LCD is off during
daytime when sunshine
falls on PV modules
properly
Wiring correct – no
display
Interface
flashes
Interface
flashes
Interface
flashes
Interface
flashes
Possible reasons
PV – no connection
1.battery voltage
below 9V
2.PV-voltage below
battery voltage
Battery over voltage
Battery over
discharged
Battery overheating
Overload or short
circuit
— 20 —
PWM Pro 12/24
Troubleshooting
Check if all connections are correct and firm.
1.Please check the voltage of battery. At least
9V voltage to activate the controller.
2.Check the PV input voltage which should be
higher than battery's.
Check if the battery voltage is higher than
OVD point (over voltage disconnect voltage)
and disconnect the modules.
When the battery voltage is restored to or
above LVR point (low voltage reconnect
voltage), the load will recover
The controller will automatically turn the
system off and restarts after a cool down to
50°C.
Please reduce the number of electric
equipment or check the load's connection.
10A | 20A | 30A | 45A
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