Faults - Possible Causes - Solutions - Riello 3470210 Installation, Use And Maintenance Instructions

SIGNAL FAULT
No blink The burner does not
start
4 pulses The burner starts and
then goes into lockout
2 pulses After pre-purge and the
safety time, the burner
goes to lockout at the
end of the safety time
7 pulses Flame detachment
The burner does not
pass to 2nd stage
Fuel passes to 2nd
stage but air remains in
1st
Burner stops at transi-
tion between 1st and
2nd stage.
Burner repeats starting
cycle.
Uneven fuel supply
Internally rusted pump
Noisy pump, unstable
pressure
Pump unprimes after
prolonged pause
Pump leaks light oil
Smoke in flame
- dark Bacharach
- yellow Bacharach
Dirty combustion head
10 pulses
POSSIBLE CAUSE
1 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Close all switches - Check fuses
2 - A limit or safety control device is open . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust or replace
3 - Control box lock-out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box (no sooner than 10 s
4 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
5 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check connections
6 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
7 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
- Defective motor capacitor 
8
(RL 34 MZ - RL 44 MZ single-phase) . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace it
9 - Flame sensor short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace sensor
10 - Light is entering or flame is simulated . . . . . . . . . . . . . . . . . . . . . . . . . . . Eliminate light or replace control box
11 - No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . Top up fuel level or suck up water
12 - Inappropriate head and air damper adjustments. . . . . . . . . . . . . . . . . . . Adjust, see page 7 and 10
13 - Light oil solenoid valves fail to open (1st stage or safety) . . . . . . . . . . . . Check connections; replace coil
14 - 1st nozzle clogged, dirty, or deformed. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
15 - Dirty or poorly adjusted firing electrodes . . . . . . . . . . . . . . . . . . . . . . . . . Adjust or clean
16 - Grounded electrode due to broken insulation . . . . . . . . . . . . . . . . . . . . . Replace
17 - High voltage cable defective or grounded . . . . . . . . . . . . . . . . . . . . . . . . Replace
18 - High voltage cable deformed by high temperature . . . . . . . . . . . . . . . . . Replace and protect
19 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
20 - Erroneous valves or transformer electrical connections . . . . . . . . . . . . . Check
21 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
22 - Pump unprimed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prime pump and see "Pump
23 - Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
24 - Pump suction line connected to return line . . . . . . . . . . . . . . . . . . . . . . . Correct connection
25 - Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
26 - Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
27 - Defective flame sensor or control box . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace sensor or control box
28 - Flame sensor dirty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
29 - 1st stage operation of cylinder is faulty . . . . . . . . . . . . . . . . . . . . . . . . . . Change the cylinder
30 - Motor lockout (RL 44 MZ three-phase - RL) . . . . . . . . . . . . . . . . . . . . . . Reset thermal relay
31 - Defective motor command remote control device (RL 44 MZ three-phase - RL) . . Substitute it
32 - Electrical power supply two-phase (RL 44 MZ three-phase). . . . . . . . . . Reset thermal relay
thermal cut-out trips when third phases are re-connected
33 - Incorrect motor rotation direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Change motor electrical connec-
34 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 7, fig. (F)
35 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 7, fig. (B)
36 - Poorly adjusted fan air gate: too much air. . . . . . . . . . . . . . . . . . . . . . . . Adjust
37 - 1st nozzle is too big (pulsation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reduce 1st nozzle delivery
38 - 1st nozzle is too small (flame detachment) . . . . . . . . . . . . . . . . . . . . . . . Increase 1st nozzle delivery
39 - 1st nozzle dirty, or deformed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
40 - Pump pressure not suitable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust it: between 10 - 14 bar
41 - 1st stage nozzle unsuited to burner or boiler . . . . . . . . . . . . . . . . . . . . . See Nozzle Table, page 6; reduce
42 - Defective 1st stage nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
43 - Control device TR does not close . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust or replace
44 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
45 - 2nd stage sol. valve coil defective. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
46 - Piston jammed in valve unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace entire unit
47 - Low pump pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
48 - 2nd stage operation of cylinder is faulty . . . . . . . . . . . . . . . . . . . . . . . . . Change cylinder
49 - Nozzle dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Renew nozzle
50 - Flame sensor dirty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
51 - Excess air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reduce
52 - Check if cause is in pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner
from tank or fuel supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .located near burner
53 - Water in tank
54 - Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
- Depression value too high (higher than 35 cm Hg):
55 - Tank/burner height difference too great. . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner with loop circuit
56 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
57 - Suction filters clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
58 - Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
59 - Paraffin solidified due to low temperature . . . . . . . . . . . . . . . . . . . . . . . . Add additive to light oil
60 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
61 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
62 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace pump
63 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan air damper, see
64 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
65 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
66 - Erroneous pump pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust to between 10 - 14 bar
67 - Flame stability disc dirty, loose, or deformed . . . . . . . . . . . . . . . . . . . . . Clean, tighten in place, or replace
68 - Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
69 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan air damper, see
70 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
71 - Unsuitable nozzle delivery or angle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . See recommended nozzles, page 6
72 - Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
73 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
74 - Erroneous head adjustment or not enough air . . . . . . . . . . . . . . . . . . . . Adjust, see page 10; open gate
75 - Blast tube length unsuited to boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
76 - Connection or internal fault
77 - Presence of electromagnetic disturbance . . . . . . . . . . . . . . . . . . . . . . . . Use the radio disturbance protection
16
SOLUTION
after the lockout)
unprimes"
tions
1st stage nozzle
Suck water from tank bottom with
separate pump
page 7 and 10
page 7 and 10
valve
kit)