Riello 663 M - Page 39

37
20167399
GB
Problems - Causes - Remedies signalled by LED indicators
20 UV: no flame at the end of the
2
nd
safety time (MTFI)
No flame at the end of the 2
nd
safety time
Inspect the system, check the gas pressure,
check the UV scanner, check the wiring,
etc.
21 Safety relay fault Internal fault Replace the control device
22 Supervisor processor fault Internal fault Replace the control device
23 Supervisor memory test fault Internal fault Replace the control device
24 Flame loss during the operation
(AUTO)
Loss of flame Check the scanner or the fuel flow line
25 Supervisor processor data
memory fault
Internal fault Replace the control device
26 Supervisor processor internal
fault
Internal fault Replace the control device
27 Not used
28 Not used
29 Operating temperature out of
range
Operating temperature below -40
°
C or
above 70
°
C
Bring the control device within the specified
temperature nominal values
30 Code memory fault Internal fault Replace the control device
31 FR: external short circuit External short circuit between T24 and
EARTH
Inspect the flame detection electrode
32 Check mode timeout (manual) The interval for the manual mode (30
minutes) to end has elapsed
Exit the manual mode correctly to avoid
timeout
33 False flame in stand-by mode Unexpected flame (false or parasitic flame)
detected during the Stand-by status
Check scanner or interference
34 Not used
35 Internal processor timeout Internal fault Replace the control device
36 Internal processor timeout Internal fault Replace the control device
37 Combustion air check timeout The system could not perform verification
tests of the combustion air during the burner
sequence
Check the wiring or the air pressure switch
38 Internal processor timeout Internal fault Replace the control device
39 Internal processor timeout Internal fault Replace the control device
40 Internal hardware fault Internal fault Replace the control device
41 Internal hardware fault Internal fault Replace the control device
42 Main processor fault Internal fault Replace the control device
43 Supervisor processor fault Internal fault Replace the control device
44 Supervisor processor timeout Internal fault Replace the control device
45 Off-specification mains voltage Off-specification mains voltage/frequency Check the mains voltage level or the
frequency. Contact the factory if the
problem persists
46 Off-specification mains voltage Off-specification mains voltage/frequency Check the mains voltage level or the
frequency.
Contact the factory if the problem persists
47 UV: Internal fault Internal fault Replace the control device
48 Supervisor processor fault Internal fault Replace the control device
49 Main processor fault Internal fault Replace the control device
50 Ignition feedback fault The system detected the presence of
voltage on T16 at the wrong moment or
there is no voltage when necessary
Check the wiring and make sure that the
earthing is appropriate
If the problem persists, contact the
distributor/factory
51 Pilot feedback fault The system detected the presence of
voltage on T17 at the wrong moment or
there is no voltage when necessary
Check the wiring and make sure that the
earthing is appropriate. If the problem
persists, contact the distributor/factory
52 Piloted valve feedback fault The system detected the presence of
voltage on T19 at the wrong moment or
there is no voltage when necessary
Check the wiring and make sure that the
earthing is appropriate
If the problem persists, contact the
distributor/factory
53 Actuator feedback waiting time
expired
No actuator feedback on T8 for more than
10 minutes
Check the wiring
Check the modulation equipment
54 Direct ignition valve feedback
fault
The system detected the presence of
voltage on T18 at the wrong moment or
there is no voltage when necessary
Check the wiring and make sure that the
earthing is appropriate. If the problem
persists, contact the distributor/factory
No. Faults Cause Solution