The module is equipped with two LEDs (one red, one yellow) which, in the event of a fault, will flash the
corresponding error code. The red LED flashes once to indicate that the system is about to signal first digit
of the error code, then the yellow LED will emit the number of flashes corresponding to this first digit. The
red LED now flashes twice to indicate that the system is about to signal second digit of the error code, then
the yellow LED will emit the number of flashes corresponding to this second digit.
The two LEDs have four operating modes which are used to signal different type of information.