Fault - Probable Cause - Suggested Remedy - Baxi TECNO 28-L Instrucciones De Instalación, Funcionamiento Y Mantenimiento

SIGNAL FAULT
No blink The burner does not
start
2 x blinks After pre-purge and the
safety time, the burner
goes to lock-out at the
end of the safety time
4 x blinks The burner starts and
then goes into lock-out
7 x blinks 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 x blinks The burner goes to lock-
out
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
4 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
5 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . .Check connections
6 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
7 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
8 - Defective capacitor (TECNO 28-L and 38-L single-phase) . . . . .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, see page 6 and 11
11 - Light oil solenoid valves fail to open (1st stage or safety). . . . . .Check connections; replace coil
12 - 1st 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 (TECNO 50-L) . . . . . . . . . . . . . . . . . . .Reset thermal cut-out
29 - Defective motor command control device (TECNO 50-L) . . . . . . . . .Replace
30 - Missing phase (TECNO 50-L). . . . . . . . . . . . . . . . . . . . . . . . . . .Reset thermal cut-out
thermal cut-out trips
31 - Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . . . . .Change motor electrical connections
32 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace photocell
33 - Light is entering or flame is simulated. . . . . . . . . . . . . . . . . . . . .Eliminate light or replace control box
34 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust, see page 6, fig. (F)
35 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . . . . .Adjust, see page 6, 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 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . .Adjust to between 10 and 14 bar
41 - 1st stage nozzle unsuited to burner or boiler . . . . . . . . . . . . . . .See Nozzle Table, page 5; reduce 1st stage
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 - Photocell 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .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, see page 6 and 11
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 spirat 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, see page 6 and 11
70 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
71 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . . . . .See recommended nozzles, page 5
72 - Loose nozzle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Tighten
73 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . . . . .Clean
74 - Erroneous head adjustment or not enough air . . . . . . . . . . . . . .Adjust, see page 11; 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
15
SUGGESTED REMEDY
after the lock-out)
when third phase is re-connected