SIGNAL
FAULT
POSSIBLE CAUSE
SOLUTION
No blink
The burner does not
start
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 lockout)
4 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
5 - Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check connections
6 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
7 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace
8 - Defective motor capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace it
4 pulses
The burner starts and
then goes into lockout
9 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell
10 - Light is entering or flame is simulated. . . . . . . . . . . . . . . . . . . . . . . . . . . Eliminate light or replace control box
2 pulses
After pre-purge and the
safety time, the burner
goes to lockout at the
end of the safety time
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
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 - Photocell dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
29 - 1st stage operation of cylinder is faulty . . . . . . . . . . . . . . . . . . . . . . . . . . Change the cylinder
30 - Incorrect motor rotation direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Change motor electrical connec-
tions
7 pulses
Flame detachment
31 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 7, fig. (A)
32 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 6, fig. (C)
33 - Poorly adjusted fan air gate: too much air. . . . . . . . . . . . . . . . . . . . . . . . Adjust
34 - 1st nozzle is too big (pulsation). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reduce 1st nozzle delivery
35 - 1st nozzle is too small (flame detachment) . . . . . . . . . . . . . . . . . . . . . . . Increase 1st nozzle delivery
36 - 1st nozzle dirty, or deformed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
37 - Pump pressure not suitable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust it: between 10 - 14 bar
38 - 1st stage nozzle unsuited to burner or boiler . . . . . . . . . . . . . . . . . . . . . See Nozzle Table, page 6; reduce
1st stage nozzle
39 - Defective 1st stage nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
The burner does not
pass to 2nd stage
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
Fuel passes to 2nd
stage but air remains in
1st
44 - Low pump pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
45 - 2nd stage operation of cylinder is faulty . . . . . . . . . . . . . . . . . . . . . . . . . Change cylinder
Burner stops at transi-
tion between 1st and
2nd stage.
Burner repeats starting
cycle.
46 - Nozzle dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Renew nozzle
47 - Photocell dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
48 - Excess air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reduce
Uneven fuel supply
49 - Check if cause is in pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feed burner
from tank or fuel supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .located near burner
Internally rusted pump
50 - Water in tank
Suck water from tank bottom with
separate pump
Noisy pump, unstable
pressure
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
Pump unprimes after
prolonged pause
57 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
58 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
Pump leaks light oil
59 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace pump
Smoke in flame
- dark Bacharach
- yellow Bacharach
60 - Not enough air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan air damper, see
page 7 and 10
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 disc 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 air damper, see
page 7 and 10
Dirty combustion head
67 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
68 - Unsuitable nozzle delivery or angle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . See recommended nozzles, page 6
69 - Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
70 - Impurities on flame stability spiral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
71 - Erroneous head adjustment or not enough air . . . . . . . . . . . . . . . . . . . . Adjust, see page 10; open gate
valve
72 - Blast tube length unsuited to boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
10 pulses
73 - Connection or internal fault
74 - Presence of electromagnetic disturbance . . . . . . . . . . . . . . . . . . . . . . . . Use the radio disturbance protection
kit)
16
Summary of Contents for TECNO 34-L
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