Fault conditions are indicated by flashing the LEDs. There are faults that are displayed viaperiodic flashing (see table "Display of fault conditions") and faults where an error code canbe determined via the number of flashes (see table "Relationship between the number offlashes and the decimal error code"). These faults are always indicated by three shortflashes at LED CH.1 or CH.2. After a longer pause, the LED will then flash at one secondintervals. The number of LED flashes corresponds to a digit in the error code. The errorcode can consist of up to 4 digits. The digits are separated by a longer period without flashing.The entire sequence is constantly repeated.