Outback Power Systems FLEXmax 80 Owners Manual - Manual (Page 94)

Troubleshooting
92 900-0009-01-00 Rev C
Symptom Remedy
FLEXmax is always
SLEEPING
 Check battery voltage. If the battery voltage is at or above the Absorbing
voltage set point (compensated for battery temperature), the FLEXmax will
not wake up.
 Check PV voltage. The PV voltage has to be at least two volts greater than
the battery voltage for the initial wakeup.
 If voltage is not present, check the PV array breaker (or fuse). Confirm the
PV array breaker (or fuse) is sized appropriately.
PV voltage reads 000
 If the PV array voltage on the display rises with the PV breaker OFF, but
reads 000 with the PV circuit breaker on, the PV array polarity may be
reversed or shorted.
 If the PV voltage still reads 000 with the PV circuit breaker off after a minute,
call OutBack Technical Support for assistance.
Status screen shows
BatTmpErr
 Confirm the type of temperature sensor. Only the OutBack RTS (remote
temperature sensor) can be used with the FLEXmax.
 If the RTS is correct, it may be faulty or damaged. Disconnect the RTS from
the jack to resume normal operation. Replace the RTS as soon as possible.
FLEXmax internal fan
not running The internal fan will only run when the internal temperature has reached
approximately 112°F. The fan will continue running until the internal
temperature is less than 104°F.
FLEXmax makes a
squealing sound If the MPP voltage is low enough to approach the battery voltage (usually when
the array is very hot), it is near the effective limit of the MPPT function. This may
cause the FLEXmax components to make a squealing noise. The problem can
be alleviated by placing the FLEXmax in Extended Play, which extends the
parameters of the MPPT sweep. See page 56 for instructions on using
Extended Play.
This mode may not be desirable under more standard conditions when the PV
voltage is higher. The efficiency of the FLEXmax controller may be reduced.
LCD display scrambled Reboot the FLEXmax controller as described on page 57. This will clear any
operating problems or glitches. It will also restore all programming items to
their factory default settings.