12 Troubleshooting
12.1 Error codes
A Error code
B Secondary error code
C Description of the error
Important
Press the
MENU
key to return to the main display.
The
symbol continues to be displayed on the control panel.
If the error is not resolved after one minute, the error code is
displayed on the control panel a second time.
Important
If the display of the error code persists, contact the accredited
assistance service.
Important
If the error code simultaneously displays the and symbols,
contact the accredited technical support service.
12.1.1 List of error codes
Tab.69 List of error codes
Display
Description of the error
10
10:Outside sensor
Outside temperature sensor.
20
20:Boiler sensor 1
Flow back sensor.
28
28:Flue gas temp sensor
Flue gas sensor.
40
40:Return sensor 1
Return temperature sensor.
46
46:Return sensor cascade
Cascade return temperature sensor error.
50
50:HW sensor 1
Domestic hot water sensor (only for heating only models with domestic hot
water tank).
52
52:HW sensor 2
Solar domestic hot water sensor (if incorporating a solar system).
60
60:Room sensor 1
Room temperature sensor 1 error.
65
65:Room sensor 2
Room temperature sensor 2 error.
68
68:Room sensor 3
Room temperature sensor 3 error.
78
78:Water pressure sensor
Hydraulic pressure sensor error.
73
73:Collector sensor 1
Solar collector sensor (if incorporating a solar system).
83
83:BSB short-circuit
Communication problem between boiler PCB and control unit. Probable
short circuit on the heating.
84
84:BSB address collision
Address conflict between several control units (internal anomaly).
91
91:Data loss in EEPROM
Loss of data in EEPROM.
98
98:Extension module 1
Extension module 1 error.
99
99:Extension module 2
Extension module 2 error.
100
100:2 clock time masters
2 master clocks
102
102:Clock without backup
Master clock with no power reserve.
103
103:Communication failure
Communication error.
109
109:Boiler temp supervision
Air present in the boiler circuit (anomaly)
110
110:Lockout SLT
Safety thermostat cut-off for overheating (pump blocked or air in the heat
ing circuit).
111
111:Shutdown limit thermost
Safety thermostat cut-off for overheating.
117
117:Water pressure too high
Pressure in hydraulic circuit too high.
118
118:Water pressure too low
Pressure in hydraulic circuit too low.
125
125:Boiler temp too high
Safety cut-off for absence of circulation (check made by a sensor).
Fig.195
Error
118: Water pressure too low
0,4 bar
BM-0000026-GB-03
A
B
C
12 Troubleshooting
134
7702639 - v03 - 10072018