RAGGIO C
203
EN
cod. 3541V280 - Rev. 01 - 04/2021
F36
A42
Sensor control protection
activation
Return and/or flow sensor
damaged or disconnected
Check the correct positioning and oper-
ation of the return and/or flow sensor
Return sensor damaged or
disconnected
Check the correct positioning and oper-
ation of the return sensor
F43
Exchanger protection
intervention.
No system H
2
O circulation Check the circulating pump
Air in the system
Vent the system
F47
Water pressure sensor
error
Water pressure sensor
disconnected
Check the water pressure sensor wiring
Water pressure sensor
damaged
Check the water pressure sensor
F51
Low water pressure with
parameter b06 = 3
Pressure too low
Fill the system
Secondary water pressure
switch disconnected or
damaged
Check the water pressure switch/pres-
sure transducer
Incorrect parameter
Check the correct parameter setting
F50 - F53
Limit thermostat fault with
parameter b06 = 1 or 4
No/poor water circulation
in the system
Check the circulating pump
Air in the system
Vent the system
Incorrect parameter
Check the correct parameter setting
F57 - A56
Calibration fault
Incorrect parameters
Check parameters and carry out a
100% calibration
Electrode damaged or not
correctly positioned.
Check the position of the electrode,
replace it if necessary. After replace-
ment, repeat the 100% calibration
Recirculation of fumes
inside the boiler
Check the tightness of the flue pipe and
the seal of gaskets
Calibration procedure not
completed
Poor primary circuit circu-
lation or poor dissipation
during calibration
Reset the fault. Turn on the hot water
faucet and wait for the flame to stop
flashing (about 2 minutes)
F58 - A61
Controller fault
Controller internal error
Check the ground connection.
Check the electrode.
If necessary replace the control unit.
A54 - A55 - A63
Controller fault
Controller internal error
Try disconnecting the power supply to
the boiler for 10 seconds and replace
the controller if necessary
F67
BCC Service key con-
nected
Load the parameters
F65 - A68
BCC Service key error
Error loading BCC Service
key file
Repeat the loading procedure within 5
minutes from the boiler power supply
and replace the BCC Service key if
necessary
A62
No communication
between controller and
gas valve
Controller not connected
Connect the controller to the valve
Check the wiring
Valve damaged
Replace the valve
A64
Maximum number of con-
secutive Resets
exceeded
Maximum number of con-
secutive Resets exceeded
Turn off the power to the boiler for
60
seconds
and then reinstate the boiler
F66
Firmware not loaded suc-
cessfully
Reload the firmware or replace the card
Fault code
Fault
Possible cause
Cure