Immergas Magis Combo 12 V2 I Instructions And Recommendations page 77

Error
Anomaly signalled
Code
ΔT high
E 45
Safety thermostat
E 46
intervention zone 1
High temperature
block on heat
E 49
generator return
probe
External probe
E 50
missing or faulty
Puffer probe anomaly
E 54
(optional)
E 55 Zone 1 probe anomaly
P.C.B. malfunction
E 80
block
Block - maximum no.
E 98
of software errors
General block
E 99
Zone 1 device offline
E 121
alarm
Zone 2 device offline
E 122
alarm
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised After-Sales Technical Assistance Centre)
(2) The anomaly can only be verified in the list of errors in the "Information" menu.
(3) The heat pump mode does not start, the heat generator stays active to satisfy the room heating and domestic hot water produc-
tion requests.
(4) The heat generator does not start, the heat pump mode stays active to satisfy the ongoing requests.
Cause
The board detects a sudden and unexpected rise in ΔT be-
tween the system flow probe and return probe, the heat
generator limits the burner output to prevent damaging the
condensing module; when the correct ΔT has been re-
stored, the heat generator returns to normal operation.
During normal operation, if an anomaly causes excessive
overheating of the flow temperature in zone 1, the unit indi-
cates the malfunction.
This occurs when the heat exchanger return circuit reaches
a temperature that is too high.
In the event the external probe is not connected or is faulty,
the anomaly is indicated.
The board detects an anomaly on the puffer probe.
If the board detects an anomaly on the zone 1 probe, the
system cannot work in the affected area.
This occurs in the event of malfunctions of the P.C.B. that
controls the gas valve.
The maximum number of software errors possible has been
reached.
A heat generator anomaly has been detected.
The device connected to zone 1 is offline.
The device connected to zone 2 is offline.
ST.008705/000
Indoor Unit status / Solution
If normal conditions are restored, the
heat generator restarts without having
to be reset (1) (4).
The unit does not meet the zone
central heating requirement (1).
Make sure that water circulates
properly in the heat generator and that
the three-way valve works properly.
Press the Reset button (1) (4).
Check the external probe connection.
The system continues to operate with
the external probe integrated in the
Outdoor Unit (1).
In case of replacement of the external
probe, repeat the installation opera-
tions.
Puffer mode is disabled (1).
(1).
Press the Reset button (1) (4).
Press the Reset button (1) (4).
Press the Reset button (1) (4).
(1).
(1).
Magis Combo 12/14/16 V2 I 77