Outback FM80 User Manual

Operation
900-0009-01-00 Rev D 25
MPPT Float
This is a Maximum Power Point Tracking mode which harvests the maximum wattage available
from the PV array. The controller is trying to regulate the battery voltage towards the Float
voltage set point. Normally, the charge controller enters this mode if it was in the Floating
mode (see above) and there was not enough energy to maintain the battery voltage.
MPPT EQ
The equalization cycle has started and the charge controller is trying to regulate the batteries at
the BATTERY EQUALIZE VOLTS set point. Once this voltage has been reached, the
displayed mode will change to EQ.
Before equalizing, battery loads should be turned off and the battery should be charged so the
charge controller can quickly reach the EQ voltage set point. Otherwise, the charge controller
may have difficulty reaching or maintaining the equalization process.
Equalization is not battery temperature compensated.
New V
oc
The FLEXmax is measuring a new open-circuit panel voltage (V
oc
). This mode tells the user
that external conditions have changed. After displaying this message, the charge controller will
enter Tracking mode to perform power point tracking again.
OvrCurrent
This condition occurs if more than 6 amps flows from the battery to the FLEXmax, or if more
than 100 amps is drawn from the FLEXmax by the battery. To reinitiate power production,
press <RSTRT> in the Misc menu (see page 48). If this continues to occur, the unit may
be malfunctioning.
Over Temp
The FLEXmax is too hot. If this message appears, carefully check to see if the heat sink
is extremely hot. To help control its operating temperature, avoid installing the FLEXmax in
direct sunlight.
Re-Cal
There are certain conditions that can confuse the current measuring method in the FLEXmax.
If this happens, the FLEXmax will temporarily stop and re-calibrate. This may happen because
of high temperatures or current flowing from the battery. After displaying this message, the
charge controller will enter Tracking mode to perform power point tracking again.
Sleeping
The PV voltage is two volts less than the battery voltage. This normally appears at night, when
no PV energy is available. This may also appear during the day when the FLEXmax is
transitioning between certain states, or due to other conditions. After three hours of Sleeping,
the FLEXmax will transition to Zzzzz... mode.