Immergas MAGIS COMBO 4 V2 Instructions And Recommendations page 52

Interface board anomalies list
If the outdoor unit is faulty, the error code is signalled on the con-
trol panel (Fig. 43) and on the interface board (see paragraph "In-
terface board - 7-segment display"). The failure is signalled in dif-
ferent ways.
On the control panel, the error is displayed with an "A" + error
code.
Error Code
A101 Outdoor unit communication error
Communication error due to incorrect address of
A109
interface board
A122 MODBUS communication error
A162 EEPROM error
A177 Emergency error
A198 Error of thermal fuse terminal board (open)
Communication error (failed coupling) between
A201
interface board and outdoor unit
Communication error (failed coupling) between
A202
indoor unit and interface board
Communication error between Inverter and main
A203
board of the outdoor unit
A221 Outdoor unit air temperature sensor error
A231 Condenser temperature sensor error
A251 Discharge temperature sensor error
Compressor sensor error (overload protection
A320
sensor)
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised After-Sales Technical Assistance Centre)
52
Anomaly signalled
On the interface board, the error is displayed with an "E" + error
code, showing a sequence of two digits.
For example:
Error 101 is displayed as follows: E1 alternated with 01.
The following is the list of alarms as displayed on the control pa-
nel.
Indoor unit status / Solution / Solution
Check the communication cable to the outdoor unit. Check that
the interface board works properly.
(1)
Check the address on the interface board.
(1)
Check communication between the management board and inter-
face boards.
(1)
Replace the main board of the outdoor unit
(1)
(1)
(1)
Check the communication cable to the outdoor unit.
Check that the interface board and main board of the outdoor unit
work properly
(1)
Check the communication cable to the outdoor unit.
Check that the interface board and main board of the outdoor unit
work properly
(1)
Check wiring of communication between the two boards.
Replace the main board.
Replace the inverter board
(1)
Check the position of the sensor.
Check the relative wiring
Replace the sensor
(1)
Check the position of the sensor.
Check the relative wiring
Replace the sensor
(1)
Check the position of the sensor.
Check the relative wiring
Replace the sensor
Check the position of the sensor.
Check the relative wiring
Replace the sensor
(1)