Classic Manual Rev L
58 | P a g e 1 0 - 0 0 1 - 1 R E V L
Updating the firmware
and the Classic went
well but the MNGP will
not update
Ensure the MNGP is plugged in using the blue display cable in the
top jack of the main circuit board.
Verify you have an MNGP and not an MNLP. The MNLP is an LED
panel that comes with the Classic Lite and does not need to be
updated.
When the black box pops up telling you to power the Classic up,
Count to 4 before turning the breaker on.
If you do not have a breaker or disconnect and you are trying to
connect a wire to a terminal block or a battery, the connection
will likely be too dirty for the boot loader. Install the proper
breakers.
Classic goes to Absorb
at too low or too high
of a voltage
Verify this is not normal operation due to the battery being
warmer than the neutral point. You can verify the battery
temperature by going into the Main Menu and selecting the
TEMPS Menu. The Classic will adjust the actual charge voltage
based on the temperature of the battery. It uses 2 programmable
variables: 1) Temperature neutral point (typically 25 degrees C;
programmed in the WBJr Status Menu) and 2) millivolts per
degree C per cell (typically -5Mv). Verify both are set per the
battery manufacturers specs.
Too low voltage example: If Absorb were set for 58.8V and the
battery is at 35 degrees C and the temp comp is set for -5mV, we
have a 10 degree C difference: 10 x 24 = 240 x 0.005 = 1200mV
(or 1.2V), so the Classic will charge to 57.6V.
Too high voltage example: If Absorb were set for 58.8V and the
battery is at 15 degrees C and the temp comp is set for -5mV, we
have a 10 degree C difference: -10 x 24 = -240 x 0.005 = -1200mV
(or -1.2V), so the Classic will charge to 60V.
Classic goes to Float
too early
Ensure End Amps is not set too high causing the Classic to go to
Float (End Amps is in the Charge/Advanced Menu and the way it
works is if the charge current falls below the End Amps setting
AND the Classic is in Absorb, the Classic will go to Float. Setting
End Amps to 0 will disable it. End Amps setting is a value the
battery manufacturer supplies.
Make sure you have the Absorb time set properly.
Classic says “OCP is
OFF” on the MNGP
This can happen on older Classics that have had the firmware
updated. This will have no effect on the operation of the Classic
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