Riello RL 70 Installation, Use And Maintenance Instructions page 62

SIGNAL FAULT
Burner stops at transi-
tion between 1st and 2nd
stage or vice versa.
Burner repeats starting
cycle
Uneven fuel supply
Rusty pump internal
parts
Noisy pump, unstable
pressure
Pump unprimes after
prolonged pause
Pump leaks light oil
Smoke in flame - dark
Bacharach - yellow
Bacharach
Dirty combustion head
10 led blinks The burner goes to lock-
out
2916076
Faults - Possible causes - Solutions
PROBABLE CAUSE
49 - Nozzle dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
50 - Photoresistor dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
51 - Excess air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
52 - Check if cause is in pump or in the fuel supply system
53 - Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
54 - Air has entered the suction line . . . . . . . . . . . . . . . . . . .
- Depression value too high (higher than 35 cm Hg)
55 - Tank/burner height difference too great . . . . . . . . . . . . .
56 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . .
57 - Suction filters clogged . . . . . . . . . . . . . . . . . . . . . . . . . .
58 - Suction valves closed. . . . . . . . . . . . . . . . . . . . . . . . . . .
59 - Paraffin solidified due to low temperature . . . . . . . . . . .
60 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . .
61 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . .
62 - Leakage from sealing organ. . . . . . . . . . . . . . . . . . . . . .
63 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
64 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . .
66 - Erroneous pump pressure . . . . . . . . . . . . . . . . . . . . . . .
67 - Flame stability spiral dirty, loose, or deformed . . . . . . . .
68 - Boiler room air vents insufficient . . . . . . . . . . . . . . . . . .
69 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . .
71 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . .
72 - Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
73 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . .
74 - Erroneous head adjustment or not enough air . . . . . . . .
75 - Blast tube length unsuited to boiler . . . . . . . . . . . . . . . .
76 - Connection or internal fault . . . . . . . . . . . . . . . . . . . . . .
77 - Presence of electromagnetic disturbance . . . . . . . . . . .
30
GB
SUGGESTED REMEDY
Replace
Clean
Reduce
Feed the burner from a tank located nearby
Suck water from tank bottom with separate pump
Tighten connectors
Feed burner with loop circuit
Increase
Clean
Open
Add additive to light oil
Bring to same height as suction pipe
Tighten connectors
Replace pump
Adjust head and fan gate, see page 15 and page 21.
Replace
Clean or replace
Adjust to between 10 - 14 bar
Clean, tighten in place, or replace
Increase
Adjust head and fan gate, see page 15 and page 21.
Replace
See recommended nozzles, page 13
Tighten
Clean
Adjust, see page 21, open gate valve
Contact boiler manufacturer
Use the radio disturbance protection kit
Tab. G