Outback Power Systems FLEXmax 80 Owners Manual - Manual (Page 25)

Operation
900-0009-01-00 Rev C 23
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 Voc
The FLEXmax is measuring a new open-circuit panel voltage (Voc). 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
in the Misc menu (see page 45). 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.
Sys Error
This indicates an internal non-volatile memory error. The unit will stop operating when this message
is displayed. Call OutBack Technical Support if this message appears (+1.360.618.4363).
Tracking
In Tracking mode, the FLEXmax is doing an initial tracking of the panel voltage from Voc towards
battery voltage after wakeup. This is also displayed when the controller transitions from a target set
point (Absorbing, Floating, or EQ) to the MPPT state (MPPT Bulk, MPPT Float, or MPPT EQ).