Immergas MAGIS PRO 12 V2 Instructions And Recommendations page 62

Interface board - indicator LED
CN3 CN2
RED BLK
Key (Fig. 37):
Red LED flashing = Communication between interface board and P.C.B. valid
Green LED flashing = Communication between interface board and outdoor unit valid
Yellow LED = Not Used
Interface board - 7-segment display
During normal operation, the display shows "A0" for 1 second, followed by"30" for 1 second:
VALID COMMUNICATION
In case of an error of the outdoor unit, a sequence of two digits at a time is displayed: "E" plus outdoor unit error code:
62
ERROR CODES
E101
LED
SEGMENTS
SEGMENTS
37