Riello 970T Serie Instructions Pour Installation, Utilisation Et Entretien page 40

SIGNAL FAULT
No blink The burner does not
start
2 led After pre-purge and the
safety time,
the burner goes to lock-
out
4 led The burner starts
and then goes into lock-
out
7 led 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 led The burner goes to lock-
out
PROBABLE CAUSE
1 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check fuses
2 - The thermostat/pressure switch TL is open . . . . . . . . . . . . Adjust or replace
3 - The thermostat/pressure switch TS is open . . . . . . . . . . . . Adjust or replace
4 - Control box lock-out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box (no sooner than 10 s after the lock-out)
5 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
6 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . Check connections
7 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
8 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
9 - No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . Top up fuel level or suck up water
10 - Inappropriate head and air damper adjustments. . . . . . . . . Adjust
11 - Light oil solenoid valves fail to open (1st stage or safety) . . Check connections; replace coil
12 - 1st stage nozzle clogged, dirty, or deformed. . . . . . . . . . . . Replace
13 - Dirty or poorly adjusted firing electrodes . . . . . . . . . . . . . . . Adjust or clean
14 - Grounded electrode due to broken insulation . . . . . . . . . . . Replace
15 - High voltage cable defective or grounded . . . . . . . . . . . . . . Replace
16 - High voltage cable deformed by high temperature . . . . . . . Replace and protect
17 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . Replace
18 - Erroneous valves or transformer electrical connections . . . Check
19 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
20 - Pump unprimed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Prime pump and see "Pump unprimes"
21 - Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . Replace
22 - Pump suction line connected to return line . . . . . . . . . . . . . Correct connection
23 - Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . Open
24 - Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . Clean
25 - Defective photocell or control box . . . . . . . . . . . . . . . . . . . . Replace photocell or control box
26 - Dirty photocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
27 - 1st stage operation of cylinder is faulty . . . . . . . . . . . . . . . . Change the cylinder
28 - Motor protection tripped . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out
29 - Defective motor command control device . . . . . . . . . . . . . . Replace
30 - Missing phase thermal cut-out trips . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out when third phaseis re-connected
31 - Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . Change motor electrical connections
32 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocel
33 - Light is entering or flame is simulated . . . . . . . . . . . . . . . . . Eliminate light or replace control box
34 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
35 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . Adjust
36 - Poorly adjusted fan air gate: too much air (1st stage). . . . . 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 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . Adjust to between 10 and 14 bar
41 - 1st stage nozzle unsuited to burner or boiler . . . . . . . . . . . See Nozzle Table, page 12; reduce 1st stage
42 - Defective 1st stage nozzle . . . . . . . . . . . . . . . . . . . . . . . . . Replace
43 - Thermostat/pressure switch 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
50 - Photocell dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
51 - Excess air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reduce
52 - Check if cause is in pump . . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner from tank
or fuel supply system
53 - Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Suck water from tank bottom with separate pump
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 gate
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 spiral 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 gate
70 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
71 - Unsuitable nozzle delivery or angle. . . . . . . . . . . . . . . . . . . See recommended nozzles
72 - Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
73 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . Clean
74 - Erroneous head adjustment or not enough air . . . . . . . . . . Adjust; open gate valve
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 kit
40
SUGGESTED REMEDY
located near burner