TBB power MPPT, User Manual, Page: 31 / 36

MPPT charge controller User Manual
2
6 . FAQ
6.1 Fault code
Alarm level definition:

Fault: MPPT charger failure, into shutdown mode, no more charging.

Warning: MPPT charger warning, but also charging normally.
Type ID Name Reason Suggestion
Fault
01 V_bus_OV
PV voltage is too
high.

Check the string of PV array.

Make sure that the PV open
circuit voltage never higher than
the maximum range of MPPT
charger.

If it happens frequently, please
contact your dealer.
02 U_BAT_OV
Battery over voltage.

Check whether the battery
voltage setting of the charger is
consistent with the battery
configuration.

Change battery voltage of the
charger, or change battery
configuration.

If it happens frequently, please
contact your dealer.
03 U_Bat_OV_HD
04 Buck_Short Cut Battery short circuit.

Check battery wiring. And
charger will return to normal
operation after the failure
disappears.

If no, please contact your dealer.
05 I_Buck1_OC
Buck1 of charger
over current.

Check whether the maximum
charging current is over range.

Check whether the charger
model setting is correct.

If the settings are correct,
please contact your dealer.
07 T_Board_OT
Temperature inside
the charger is too
high.

Check whether ambient
temperature is in range.

Check that the charger
installation environment is well
ventilated.

If the ambient temperature is too
high or is not ventilated well,
please improve its ventilation