Outback Power Systems user manual AUX modes in order of appearance on the FLEXmax 80 display

AUX modes in order of appearance on the FLEXmax 80 display:

• Vent Fan • PV Trigger • Error Output • Night Light • Float • Diversion Relay

• Diversion Solid State • Low Battery Disconnect • Remote

Note: All AUX functions can be manually activated in On, Off, or Auto mode. In Auto mode, the function will automatically activate when a user-determined value is met and deactivate or shut down when other conditions described here, such as a certain amount of time passing, occur.

When an AUX MODE is in AUTO, 12VDC is available at the AUX terminals and a condition, such as a voltage set point, is met. Other modes can be programmed in lieu of the specific ones listed here, but the Vent Fan mode is most easily changed (e.g., to activate an alarm instead of a fan). Here are the default AUX modes:

•Vent Fan— when the Vent Fan voltage set point is exceeded, the vent fan will run for at least 15 seconds (the fan helps remove hydrogen from battery enclosure), even if the set point is exceeded for only a few seconds due to a surge. If the set point is exceeded for longer than 15 seconds, the fan will stay on until the voltage drops below the set point. It then takes 15 seconds before the fan shuts off. This is an optional external fan and not to be confused with the FLEXmax 80’s internal, thermally activated fan which cools the unit.

•PV Trigger*—activates an alarm or relay (that disconnects the array); when the PV input exceeds the user-determined voltage set point (to avoid damage, do not go over 150VDC), the PV Trigger disconnects after a minimal adjustable amount of Hold Time.

•Error Output—useful for monitoring remote sites, switches to the Off state if the FLEXmax 80 has not charged the batteries for 26 hours or more (not an audible alarm, only displayed as a printed message on FLEXmax 80 AUX Menu) or the battery voltage has fallen below a user-determined set point for 10 continuous minutes. In the No Error state, the AUX output is on.

•Night Light*—after the PV voltage is below a threshold voltage for a user-determined time period, a user-provided light illuminates as long as the FLEXmax 80 remains sleeping or as determined by the user-established time limit.

•Float—powers a load if the FLEXmax 80 is producing power in the Float stage

•Diversion Relay*—diverts excess power away from batteries when a wind or hydro generator is connected directly to the batteries.

•Diversion Solid St—same as Diversion Relay, but applies when a solid state relay is used rather than a mechanical relay

•Low Batt Disconnect—activates/deactivates the AUX load(s) when a user-determined voltage and time levels are reached.

•Remote—allows OutBack MATE control of the AUX MODE (see MATE manual for details).

* These functions support AUX polarity.

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