Display Reading: Blank
Time of Day: Daytime/Nighttime
Possible Causes:
Battery or fuse connection and/or solar panel connection (Daytime only) or battery or fuse connection (Nighttime only).
Remedy:
Check all connections from the controller to the battery including checking for correct wire polarity. Check that all connections are clean, tight, and secure. Ensure the battery voltage is above 8 volts.
Further Steps (if required):
Check the voltage at the controller battery terminals with a voltmeter and compare with a voltage reading at the battery terminals.
If there is no voltage reading at the controller battery terminals, the problem could be a fuse, or the wiring between the battery and the controller. If the battery voltage is lower than 8 volts the controller will not function.
For the solar panel, repeat steps 1 and 2 substituting all battery terminals with solar panel terminals.
Display Reading: 0
Time of Day: Daytime/Nighttime
Remedy: Check all connections from the controller to the battery including checking for correct wire polarity. Check that all connections are clean, tight, and secure.
Display Reading: Full battery icon flashing
Time of Day: Daytime/Nighttime
Remedy:
Overvoltage error. Disconnect the solar controller from the battery and put a draw on the battery (turn lights or a fan on) to drain the battery.
Reconnect solar panel after a few minutes. Repeat as needed.
Display Reading: Empty battery icon flashing
Time of Day: Daytime/Nighttime
Remedy:
Undervoltage error. Battery is too low to register a voltage to the solar controller. Plug your RV/trailer in to shore power to recharge battery to above 8v.