Classic Manual Rev L
62 | P a g e 1 0 - 0 0 1 - 1 R E V L
I hear a singing sound
coming from my
Classic, sort of a high
pitched whine that
varies
This is the inductors “Singing” when the input voltage is really
low. This is normal and is no cause for concern; however, if it
bothers you then you can disable it by going to the Main Menu and
disabling LoMax in the TWEAKS Menu.
NOTE: If the PV array is really low voltage and its max power
point is close to the battery voltage, disabling LoMax will cause a
slight loss in power as the Classic will not be able to track all the
way to the battery voltage looking for the MPPT voltage.
I have a Classic that
came with a grey
“Magnum” battery
temp sensor. Can I
replace it with a
MidNite blue one?
No, the Magnum sensor has a different resistance value so those
Classics where modified to use those sensors. Call MidNite Tech
Support if you need help with a new sensor.
How can I verify that
all my fans work on my
Classic?
If you unplug the battery temp sensor and use a flat-blade screw
driver to short out all 6 pins inside the jack (carefully so as not to
bend the pins), the fans will start spinning.
When the Classic is turned-on, all 3 fans are energized
momentarily. This is a quick check.
How do I find the
“Wizard”?
You won’t, we removed the Wizard as it asked a lot of questions
that did nothing and was confusing. We replaced it with the Quick
Start that comes up when you first power the Classic or do a
factory restore.
My fans run all the
time no matter what
the Classic is doing
Ensure the Turbo fan wire is not pinched at the top by the front
cover.
I remotely mounted
my MNGP and now it
won’t power on or it
blinks but won’t power
up
Check that you made the cable exactly the same as the blue one.
Note that Pin 1 on one end becomes Pin 6 at the other end (mirror
image).
Try a heavier cable. We have found that off-the-shelf phone cables
are good for about 25 ft max before the voltage drop is too great.
Cat3 or Cat5E cable can go about 100 ft, no problem.
How many amps can
my Classic handle on
the input side? Or, can I
put too much PV on my
Classic?
The Classic regulates very well so within reason there is no limit
on the input amps or PV wattage. We recommend you not exceed
150% of the capacity. The Classic, if over-driven on the PV side,
will simply produce the max amount it is rated for.
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