Riello RL 28 Manuel D'entretien page 47

FAULT
The burner does not start
The burner starts
and then goes into lock-out
After pre-purge and the safety time,
the burner goes to lock-out
and the flame does not appear
The flame ignites normally
but the burner locks out when
the safety time has elapsed
Firing with pulsations
or flame detachment,
delayed firing
The burner does not pass to 2nd stage
Fuel passes to 2nd stage
but air remains in 1st
Burner stops at transition
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
PROBABLE 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 after the lock-out)
4 - Motor protection tripped (RL 38 three-phase - RL 50) . . . . . . . .Reset thermal cut-out
5 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
6 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . .Check connections
7 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
8 - Defective motor command control device (RL 38 three-phase - RL 50).Replace
9 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
10 - Defective capacitor (RL 28 - RL 38 single-phase) . . . . . . . . . . .Replace
11 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace photocell
12 - Light is entering or flame is simulated. . . . . . . . . . . . . . . . . . . . .Eliminate light or replace control box
13 - Missing phase (RL 38 three-phase - RL 50) . . . . . . . . . . . . . . . .Reset thermal cut-out
thermal cut-out trips
14 - No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . . . . .Top up fuel level or suck up water
15 - Inappropriate head and air damper adjustments . . . . . . . . . . . .Adjust, see page 21 and 27
16 - Light oil solenoid valves fail to open (1st stage or safety). . . . . .Check connections; replace coil
17 - 1st nozzle clogged, dirty, or deformed . . . . . . . . . . . . . . . . . . . .Replace
18 - Dirty or poorly adjusted firing electrodes . . . . . . . . . . . . . . . . . .Adjust or clean
19 - Grounded electrode due to broken insulation . . . . . . . . . . . . . . .Replace
20 - High voltage cable defective or grounded . . . . . . . . . . . . . . . . . .Replace
21 - High voltage cable deformed by high temperature . . . . . . . . . . .Replace and protect
22 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
23 - Erroneous valves or transformer electrical connections . . . . . . .Check
24 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
25 - Pump unprimed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prime pump and see "Pump unprimes"
26 - Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
27 - Pump suction line connected to return line . . . . . . . . . . . . . . . . .Correct connection
28 - Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . . . . .Open
29 - Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . . . . .Clean
30 - Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . . . . .Change motor electrical connections
31 - Defective photocell or control box . . . . . . . . . . . . . . . . . . . . . . . .Replace photocell or control box
32 - Dirty photocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clean
33 - 1st stage operation of cylinder is faulty. . . . . . . . . . . . . . . . . . . .Change the cylinder
34 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust, see page 20, fig. (F)
35 - Poorly adjusted or dirty firing electrodes. . . . . . . . . . . . . . . . . . .Adjust, see page 20, fig. (B)
36 - Poorly adjusted fan air gate: too much air. . . . . . . . . . . . . . . . . .Adjust, see page 26, fig. (C)
37 - 1st stage nozzle unsuited to burner or boiler . . . . . . . . . . . . . . .See Nozzle Table, page 18; reduce 1st stage
38 - Defective 1st stage nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
39 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust to between 10 and 14 bar
40 - Control device TR does not close . . . . . . . . . . . . . . . . . . . . . . . .Adjust or replace
41 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
42 - 2nd stage sol. valve coil defective . . . . . . . . . . . . . . . . . . . . . . .Replace
43 - Piston jammed in valve unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace entire unit
44 - Low pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Increase
45 - 2nd stage operation of cylinder is faulty . . . . . . . . . . . . . . . . . . .Change cylinder
46 - Nozzle dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Renew nozzle
47 - Photocell dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clean
48 - Excess air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Reduce
49 - Check if cause is in pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Feed burner from tank
or fuel supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .located near burner
50 - Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suck water from tank bottom with separate pump
51 - Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . . . . .Tighten connectors
- Depression value too high (higher than 35 cm Hg):
52 - Tank/burner height difference too great . . . . . . . . . . . . . . . . . . .Feed burner with loop circuit
53 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Increase
54 - Suction filters clogged. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clean
55 - Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open
56 - Paraffin solidified due to low temperature . . . . . . . . . . . . . . . . . .Add additive to light oil
57 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . . . . .Bring to same height as suction pipe
58 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tighten connectors
59 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace pump
60 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust head and fan gate, see page 21 and 27
61 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
62 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clean or replace
63 - Erroneous pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust to between 10 - 14 bar
64 - Flame stability spirat dirty, loose, or deformed . . . . . . . . . . . . . .Clean, tighten in place, or replace
65 - Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . . . . .Increase
66 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust head and fan gate, see page 21 and 27
67 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
68 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . . . . .See recommended nozzles, page 19
69 - Loose nozzle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tighten
70 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . . . . .Clean
71 - Erroneous head adjustment or not enough air . . . . . . . . . . . . . .Adjust, see page 21; open gate valve
72 - Blast tube length unsuited to boiler. . . . . . . . . . . . . . . . . . . . . . .Contact boiler manufacturer
47
SUGGESTED REMEDY
when third phase is re-connected
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