NINFA 24 MCS
Fault
Fault
code
A41
Sensor positioning
F42
Heating sensor fault
Exchanger protection inter-
F43
vention
F50
Modureg fault
GB
Possible cause
Delivery sensor disconnected
from pipe
Sensor damaged
No H
O circulating in system
2
Air in the system
Wiring disconnected
cod. 3540F611 - 05/2007 (Rev. 00)
Cure
Check correct positioning and operation of the heat-
ing sensor
Replace the sensor
Check the circulating pump
Vent the system
Check the wiring
55