Riello RL 28/1 Manuel D'entretien page 43

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
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 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
5 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . . Check connections
6 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
7 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
8 - Defective capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
9 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell
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 21 and 27
13 - Light oil solenoid valves fail to open (1st nozzle) . . . . . . . . . . . . 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 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
22 - Pump unprimed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Prime pump and see "Pump unprimes"
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 photocell or control box . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell or control box
28 - Dirty photocell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
29 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 20, fig. (F)
30 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . . . . Adjust, see page 20, fig. (B)
31 - Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . . . . . Adjust, see page 26, fig. (B)
32 - 1st nozzle is too big (pulsation) . . . . . . . . . . . . . . . . . . . . . . . . . Reduce 1st nozzle delivery
33 - 1st nozzle is too small (flame detachment). . . . . . . . . . . . . . . . . Increase 1st nozzle delivery
34 - 1st nozzle dirty, or deformed. . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
35 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
36 - Check if cause is in pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner from tank
or fuel supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . located near burner
37 - Water in tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suck water from tank bottom with separate pump
38 - Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
- Depression value too high (higher than 35 cm Hg):
39 - Tank/burner height difference too great . . . . . . . . . . . . . . . . . . . Feed burner with loop circuit
40 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
41 - Suction filters clogged. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
42 - Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
43 - Paraffin solidified due to low temperature. . . . . . . . . . . . . . . . . . Add additive to light oil
44 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
45 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
46 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace pump
47 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate, see page 21 and 27
48 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
49 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
50 - Erroneous pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust to between 10 - 14 bar
51 - Flame stability spirat dirty, loose, or deformed . . . . . . . . . . . . . . Clean, tighten in place, or replace
52 - Boiler room air vents insufficient. . . . . . . . . . . . . . . . . . . . . . . . . Increase
53 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate, see page 21 and 27
54 - Nozzle or filter dirty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
55 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . . . . . See recommended nozzles, page 19
56 - Loose nozzle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
57 - Impurities on flame stability spiral. . . . . . . . . . . . . . . . . . . . . . . . Clean
58 - Erroneous head adjustment or not enough air . . . . . . . . . . . . . . Adjust, see page 21; open gate valve
59 - Blast tube length unsuited to boiler. . . . . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
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SUGGESTED REMEDY - 8