Riello 876 T, Installation, Use And Maintenance Instructions

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39 20168415 GB
Problems - Causes - Remedies signalled by LED indicators
Tab. N
Fault explanation
47 UV: Internal fault ● ● Red
48 Supervisor processor fault ● ● ● Red
49 Main processor fault ● ● ● Red
50 Ignition feedback fault ● ● ● ● Red
51 Pilot feedback fault ● ● ● Red
52 Piloted valve feedback fault ● ● ● ● Red
53 Actuator feedback waiting time
expired
● ● ● ● Red
54 Direct ignition valve feedback fault ● ● ● ● ● Red
55 Internal processor fault ● ● ● Red
56 UV: false flame during operation ● ● ● ● Red
57 FR: false flame during operation ● ● ● ● ● Red
58 T8 inlet fault ● ● ● ● ● Red
59 Internal hardware fault ● ● ● ● Red
60 Local reset fault ● ● ● ● ● ● Red
61 Open POC fault ● ● ● ● Red
62 UV: strong UV flame fault ● ● ● ● ● Red
63 Internal hardware fault ● Red
No. Faults LED 1 LED 2 LED 3 LED 4 LED 5 LED 6 LED 7
No. Faults Cause Solution
1 Post-diagnostics fault Initial power diagnostics fault
Make sure that the status of inlets and
outlets is correct upon ignition
Check T12, T13 and T14
2 Local reset The user started the manual reset or the
reset switch is faulty
Check T21 inlet or reset for normal
operation
3 Combustion air fan fault No Air Check signal (T14) during the bleed
cycle or Air Check signal loss during the
burner operation
Check the fan or the air pressure switch
4 Supervisor processor
diagnostics fault
The system detected the presence of
voltage on T16, T17, T18 or T19 at the
wrong moment or there is no voltage when
necessary
Check the wiring and make sure that the
system is operating on a single-phase line
(50/60Hz)
5 FR- No flame at the end of the
2
nd
safety time (MTFI)
No flame at the end of the second safety
time
Inspect the system, check the gas pressure,
inspect the flame detection electrode, check
the wiring, etc.
6 FR: internal circuit fault Internal fault Replace the control device
7 Internal communication fault Internal fault Replace the control device
8 Remote reset The user pressed the remote reset button or
the reset switch is discontinuous/dynamic
Check the remote switch
9 FR: internal fault Internal fault Replace the control device
10 Main processor fault Internal fault Replace the control device
11 Data memory test fault Internal fault Replace the control device
12 Data memory test fault Internal fault Replace the control device
13 Mains voltage or frequent fault Off-specification power supply voltage and/
or frequency
Check the input power supply
14 Internal processor fault Internal fault Replace the control device
15 Internal processor fault Internal fault Replace the control device
16
No flame: 1
st
safety time (PTFI)
No flame at the end of the first safety time Inspect the system, check the gas pressure,
check the UV scanner, check the wiring,
etc.
17 Wiring fault The system detected the presence of
voltage on critical terminals (T16, T17, T18
or T19) at the wrong moment or there is no
voltage when necessary
Inspect the wiring and make sure that the
system is operating on a single-phase line
(50/60Hz)
18 Safety relay fault Internal fault Replace the control device
19 Combustion airflow switch fault
in the rest position
Open the circuit upon T13 start-up Check the wiring for the air pressure switch