Outback Power Systems Troubleshooting Guide, FLEXmax 80 does not boot/power-up blank LCD

26. Troubleshooting Guide

FLEXmax 80 does not boot/power-up (blank LCD)

Be sure to check out the OutBack customer and user forum at www.outbackpower.com/forum/ for more FLEXmax 80 information.

•Check the battery connection and polarity.

•Reverse polarity or an improper connection will cause power-up issues.

•Check the battery breaker.

•Ensure that the battery breaker is sized appropriately.

•A battery voltage below 10.5VDC may not power up the FLEXmax 80 (measure the battery-side of wire lugs).

•If the FLEXmax 80 still does not power up, call the factory for additional support.

FLEXmax 80 is always SLEEPING

•If the battery voltage is at or above the ABSORB voltage set point (compensated ABSORB voltage), the FLEXmax 80 will not wake up.

•The PV voltage has to be at least two volts greater than the battery voltage for the initial wakeup.

•Check the PV array breaker (or fuse).

•Confirm the PV array breaker (or fuse) is sized appropriately.

•Which State (in MISC Menu) is it at? Is it transitioning between 00 and 01? Is it in GT mode and connected to a MATE?

•GT mode is only applicable with a HUB 4 or HUB 10 installations with a grid-tie compatible MATE.

•Does the PV array voltage on the display rise with the PV breaker OFF, but reads 000 with the PV breaker on?

•If so, the PV array polarity connection on the FLEXmax 80 maybe reversed or the PV lines could be shorted.

•Does the PV voltage still read 000 with the PV breaker off after a minute?

•Call the factory for support.

•Have you checked the short circuit current of the PV array?

•Use a multi-meter to determine if a short circuit current is detected. The short circuit current test will not harm the array.

FLEXmax 80 not producing expected power

•Clouds, partial shading, or dirty panels can cause poor performance.

•The lower current limit set point in the Charger menu will yield a loss of power or poor performance symptoms.

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