34
(1) When the burner does not fire or comes to a halt following a fault, the symbol which appears on control box 24)(A)p.8 indicates the type of problem.
(2) The fuse is located in the rear part of the control box 24)(A)p.8. A pull-out fuse is also available as a spare part which can be fitted after breaking the tang on the
panel which holds it in place.
SYMBOL (1)
FAULT
PROBABLE CAUSE
SUGGESTED REMEDY
The burner does not start
1 - A limit or safety control device is open . . . . . . . . . . . . . . . . Adjust or replace
2 - Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box
3 - Oil pressure switch intervenes (see page 23) . . . . . . . . . . . Adjust pressure switch or eliminate overpres-
sure
4 - Motor protection tripped . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out
5 - No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
6 - Control box fuse blown . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace (2)
7 - Contact II of servomotor does not operate, . . . . . . . . . . . . . Adjust cam II or replace servo-motor
control box terminals 11 - 8
8 - Pump is jammed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
9 - Defective motor command control device . . . . . . . . . . . . . . Replace
10 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
11 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
The burner does not start and a
function lock-out occurs
12 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
13 - Photocell short-circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace photocell
14 - Missing phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out
thermal cut-out trips
when third phase is re-connected
The burner starts but stops at
maximum air damper setting
15 - Contact I of servomotor does not operate, . . . . . . . . . . . . . Adjust cam I or replace servomotor
control box terminals 9-8
The burner starts and then goes
into lock-out
16 - Fault in flame detection circuit. . . . . . . . . . . . . . . . . . . . . . . Replace control box
The burner remains in pre-purging
phase
17 - Contact III of servomotor does not operate, . . . . . . . . . . . . Adjust cam III or replace servomotor
control box terminals 10-8
After pre-purge and the safety
time, the burner goes to lock-out
and the flame does not appear
18 - No fuel in tank; water on tank bottom . . . . . . . . . . . . . . . . . Top up fuel level or suck up water
19 - Inappropriate head and air damper adjustments . . . . . . . . Adjust
20 - Light oil solenoid valves fail to open . . . . . . . . . . . . . . . . . . Check connections; replace coil
21 - Nozzle clogged, dirty, or deformed . . . . . . . . . . . . . . . . . . . Replace
22 - Dirty or poorly adjusted firing electrodes. . . . . . . . . . . . . . . Adjust or clean
23 - Grounded electrode due to broken insulation . . . . . . . . . . . Replace
24 - High voltage cable defective or grounded . . . . . . . . . . . . . . Replace
25 - High voltage cable deformed by high temperature . . . . . . . Replace and protect
26 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . Replace
27 - Erroneous electrical connections of valves or transformer . Check
28 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
29 - Pump unprimed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prime pump and see "Pump unprimes” (53-54)
30 - Pump/motor coupling broken . . . . . . . . . . . . . . . . . . . . . . . Replace
31 - Pump suction line connected to return line . . . . . . . . . . . . . Correct connection
32 - Valves up-line from pump closed . . . . . . . . . . . . . . . . . . . . Open
33 - Filters dirty: line - pump - nozzle . . . . . . . . . . . . . . . . . . . . . Clean
34 - Incorrect motor rotation direction . . . . . . . . . . . . . . . . . . . . Change motor electrical connections
The flame ignites normally but the
burner locks out when the safety
time has elapsed
35 - Defective photocell or control box . . . . . . . . . . . . . . . . . . . . Replace photocell or control box
36 - Dirty photocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
Firing with pulsations or flame
detachment, delayed firing
37 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
38 - Poorly adjusted or dirty firing electrodes . . . . . . . . . . . . . . . Adjust
39 - Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . Adjust
40 - Nozzle unsuited for burner or boiler . . . . . . . . . . . . . . . . . . See Nozzle Table
41 - Defective nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
42 - Inappropriate pump pressure . . . . . . . . . . . . . . . . . . . . . . . Adjust
The burner does not pass to 2nd
stage
43 - Control device TR does not close . . . . . . . . . . . . . . . . . . . . Adjust or replace
44 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
Uneven fuel supply
45 - Check if cause is in pump or . . . . . . . . . . . . . . . . . . . . . . . . Feed burner from tank
fuel supply system
located near burner
Internally rusted pump
46 - Water in tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Suck water from tank bottom with separate pump
Noisy pump, unstable pressure
47 - Air has entered the suction line . . . . . . . . . . . . . . . . . . . . . Tighten connectors
- Depression value too high (higher than 35 cm Hg):
48 - Tank/burner height difference too great . . . . . . . . . . . . . . . Feed burner with loop circuit
49 - Piping diameter too small . . . . . . . . . . . . . . . . . . . . . . . . . . Increase
50 - Suction filters clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
51 - Suction valves closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open
52 - Paraffin solidified due to low temperature . . . . . . . . . . . . . . Add additive to light oil
Pump unprimes after prolonged
pause
53 - Return pipe not immersed in fuel . . . . . . . . . . . . . . . . . . . . Bring to same height as suction pipe
54 - Air enters suction piping . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten connectors
Pump leaks light oil
55 - Leakage from sealing organ . . . . . . . . . . . . . . . . . . . . . . . . Replace
pump
Smoke in flame - dark Bacharach
- yellow Bacharach
56 - Not enough air. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
57 - Nozzle worn or dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
58 - Nozzle filter clogged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
59 - Erroneous pump pressure. . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
60 - Flame stability disk dirty, loose, or deformed . . . . . . . . . . . Clean, tighten in place, or replace
61 - Boiler room air vents insufficient . . . . . . . . . . . . . . . . . . . . . Increase
62 - Too much air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust head and fan gate
Dirty combustion head
63 - Nozzle or filter dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
64 - Unsuitable nozzle delivery or angle . . . . . . . . . . . . . . . . . . See recommended nozzles
65 - Loose nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tighten
66 - Impurities on flame stability disk . . . . . . . . . . . . . . . . . . . . . Clean
67 - Erroneous head adjustment or not enough air . . . . . . . . . . Adjust, open air damper
68 - Blast tube length unsuited to boiler . . . . . . . . . . . . . . . . . . . Contact boiler manufacturer
During operation, the burner stops
in lock out
69 - Dirty or defective photocell . . . . . . . . . . . . . . . . . . . . . . . . . Clean or replace
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Summary of Contents for 952 T1
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