Manual

Classic SL owner’s manual (continued)
25 | P a g e x x - xxx- x x R E V : A
Uploading New Firmware to the Classic
The Classic has the ability to have its firmware updated with a standard USB cable and a Windows based
PC. The USB cable is Standard to Mini B. Please see www.midnitesolar.com and click on the Software tab
for the firmware and instructions. Due to the various different Windows configurations we will not go into
detail in the Classic Manual. The Firmware upgrade is fail safe so if the wrong code is installed the Classic
simply says “Wrong code” prompting you to load the correct code. Also if the upload is interrupted for
whatever reason simply start over.
WARNING ! The Classic's USB port is NOT isolated from battery negative. This is typically only an issue on
positive ground systems or systems with a tripped ground fault protection device. Care must be taken that a
computer connected to the Classic's USB port is either isolated from ground and the Classic's negative or
that the computer's USB negative is common with the Classic's negative and ground.
WARNING ! You cannot turn a Classic 150 into a Classic 200 for example using new software the internal
components are also different.
Troubleshooting
Classic will not power on.
“No self test on power up”
*Check for voltage between the Battery + and the common – on the blue
terminal block inside the Classic. If voltage is present and above 10vdc contact
customer service. If no voltage is present back step through the + and – to find
the fault.
Classic Display is blank but
Classic is on.
*Check that the blue cable is plugged in between the display and the top most
jack on the circuit board.
*Try another cable. A standard short 4 conductor phone cable will work.
Classic says “Resting” but the
sun is out?
*Resting indicates a lack of power available to the Classic. Verify there is
voltage on the display under “IN” that is at least 30% greater than battery
voltage.
*Verify the Charging mode is correct for the source as well as the Mode is “ON”
Classic switches between
Resting and Bulk MPPT
repeatedly but produces 0 watts.
*This can be normal during low light conditions.
*Watch the IN voltage and see if it is setting stable and does not change when
the Classic goes from Resting to Bulk MPPT if so call customer service
*Watch the IN voltage and see if it slowly drops to battery voltage (Or Close)
when the Classic goes to Bulk MPPT if so this is usually a sign of a High
resistance connection (Loose Connection between the Classic and DC source)
The Display shows 0 volts in
(or real close) but the battery
voltage looks correct.
*If this is a new install or recently altered install check for reverse polarity on
the DC input of the Classic.
*If this just happened out of the blue or reverse polarity has been eliminated call
customer service.
The Display is showing “Mode
is Off”
*Enter into the main menu and select Mode. Turn the Mode ON and press Enter
to save.