Classic Manual Rev L
59 | P a g e 1 0 - 0 0 1 - 1 R E V L
but to make the message go away do a factory restore to fix this.
Classic says “OCP” now
and then on the MNGP
This can be normal if the battery bank is small or the inverter
cables are too small. If this shows up just once in a great while
that would be OK, but if it is happening regularly you may want to
look at the size of the battery cables, age of the battery bank, or
the size of the battery in amp-hours. Call Tech Support for
assistance.
Classic has an orange
LED on the display lit
up and/or says “Amp
Limit”
This indicates the Classic is current limiting. Either because it has
reached the current limit you have set in the Charge/Limits Menu
or because it is too hot and it is backing its current down to
prevent overheating.
Go to the Charge/Limits Menu and verify the amp limits for In
and Out are set to what you desire.
Classic says “Hyper
VOC” on the MNGP
This indicates that the input voltage has exceeded the operational
voltage of the Classic. If this is happening now and then on rare
occasions when it is really cold, then it is normal. If this is
happening all the time this indicates the PV array was wired for
too high a voltage. Contact your solar installer.
Classic says “Battery
over V” on the MNGP
This is an indication the Classic thinks the battery voltage is too
high and has stopped charging.
This can happen with multiple Classics that are not networked
together (Follow-Me). If one of the Classics goes to Float it can
show this and will go away as soon as the other Classic goes to
Float.
If this is a new install, the wrong nominal voltage may be selected
and a factory restore is required.
If this is a running system, then you may have another charging
source that has malfunctioned and is over-charging the battery
bank.
Classic says “GRND
FLT” on the MNGP and
is making a loud
beeping sound
Generally this would be caused by the PV or battery positive
shorting to ground somewhere in the system.
Verify it is a real fault by carefully measuring between battery
negative and earth ground. If you measure voltage, then the
system has a fault. Call your installer for help finding and
rectifying the fault.
The Classic will automatically stop showing the fault when the
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