FlexMax FM100 AFCI Installation

Troubleshooting
900-0253-01-00 Rev A 57
Table 7 Troubleshooting
Symptom Remedy
Charging is not
temperature-
compensated.

The FLEXmax 100 is performing equalization (see pages 44 and 70). This function
is not temperature-compensated. It is not a controller error but a deliberate action.

The Remote Temperature Sensor (RTS) is damaged (either shorted or open). If it is
shorted, the system display
Shorted RTS
message will indicate
Y
(see page 38).
To test, remove or replace the RTS.
Unit is in equalization
cycle but is not
achieving the
expected results.

Check equalization settings using the system display (see pages 44 and 70). The
default settings are not sufficient for many batteries and may need to be adjusted.

The cycle will begin when the
Equalization Voltage
set point has been reached. A
small array or cloudy weather will delay the equalization cycle. Running too many
battery loads will also delay the cycle. Loads should be removed or minimized.

Check the PV array temperature. At high temperatures, the maximum power point
voltage may be near or lower than the battery voltage. This can delay the cycle.
Battery Calibration
setting does not
respond.
The system display will not report this setting if remote battery sensing is connected.
To test this function, temporarily disconnect remote battery sensing. See pages 20
and 50.