Outback Power Systems FlexMax 60 User Manual page 66

Sleeping The PV voltage is two volts less than the battery voltage. This may also appear during the day
when the Charge Controller is transitioning between certain states, or due to other conditions.
SysError (Very rare) System Error indicates an internal non-volatile memory error. The unit will stop
operating when this message is displayed. Call the factory if you see this message (360-435-6030).
Tracking In Auto-Sweep MPPT mode, the Charge Controller is doing an initial tracking of the panel voltage
from VOC towards battery voltage after wakeup. This display also appears when the controller transitions
from a target set point (Absorbing/ Floating/EQ 0:00) to the MPPT state (MPPT Bulk/ MPPT Float/ MPPT EQ).
Unloaded The battery terminals abruptly unload. Unloaded is also displayed if the battery breaker trips
while MPPTing or the battery voltage is set too low.
Wakeup As the PV open circuit voltage (VOC) rises above the battery system voltage by two volts, the
Charge Controller prepares to deliver power to the batteries. During this period, the Charge Controller is
calculating the pulse width modulation (PWM) duty cycles, turning on power supply voltages in the proper
sequences, and making internal calibrations. At wakeup, the Charge Controller closes its relays and then
starts tracking the input voltage (the "initial" tracking) towards the battery voltage. At dawn and dusk this
may happen many times until there is (or is not) enough power from the PV array to keep going. Wakeup is
also a time when the Charge Controller acquires a new VOC.
Zzzzz... At night (after 3 hours of continuous Sleeping) the Charge Controller will display Zzzzz... until
the next wakeup. At the next wakeup, (usually the next morning), the daily statistics of a single Charge
Controller, (AmpHours, KWh, etc.), will accumulate into the total statistics and then the displayed daily
statistics and End of Day summary will clear. A Bulk charge will automatically initiate at the next Wakeup. A
Charge Controller combined with a HUB and a MATE will log at midnight.
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