48
(1) The control box 12)(A)p.10 is fitted with a disc rotates during the firing programme, which can been seen through the transparent lock-out reset button. When the
burner does not fire or comes to a half following a fault, the symbol which appears behind the reset button indicates the type of problem.
(2) The fuse is located in the rear part of the control box 12)(A)p.10. A pull-out fuse is also available as a spare part which can be fitted after breaking the tag on the
panel which holds in place.
SYMBOL
(1)
FAULT
PROBABLE CAUSE
SUGGESTED REMEDY
The burner does not start
1
- No electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
2
- A limiter or safety control device is open. . . . . . . . . . . . . . . Adjust or replace
3
- Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset control box
4
- Control box fuse blown . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace (2)
5
- Erroneous electrical connections . . . . . . . . . . . . . . . . . . . . Check connections
6
- Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
7
- No gas supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open the manual valves between meter and train
8
- Mains gas pressure insufficient . . . . . . . . . . . . . . . . . . . . . . Contact your GAS COMPANY
9
- Minimum gas pressure switch fails to close . . . . . . . . . . . . Adjust or replace
10 - Air pressure switch in operating position. . . . . . . . . . . . . . . Adjust or replace
11 - Contact 1 of servomotor does not operate . . . . . . . . . . . . . Adjust cam 1 or replace servomotor
control box terminals 11-8
The burner does not start
and a function lock out occurs
12 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
13 - Defective motor remote control switch . . . . . . . . . . . . . . . . Replace
14 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
15 - Motor protection tripped . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out when third phase is re-
connected
The burner starts but stops at
maximum gate valve setting
16 - Contact 2 servomotor does not operate . . . . . . . . . . . . . . . Adjust cam 2 or replace servomotor
control box terminals 9-8
The burner starts and then
locks out
Air pressure switch inoperative due to insufficient air pressure:
17 - Air pressure switch adjusted badly . . . . . . . . . . . . . . . . . . . Adjust or replace
18 - Pressure switch pressure point pipe blocked . . . . . . . . . . . Clean
19 - Head wrongly adjusted . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
20 - Dirty fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clean
21 - High negative draft in chamber . . . . . . . . . . . . . . . . . . . . . . .Ask our technical office
The burner starts and then
locks out
22 - Fault in flame detection circuit. . . . . . . . . . . . . . . . . . . . . . . Replace control box
The burner stays in
the pre-purge stage
23 - Contact 3 servomotor does not operate . . . . . . . . . . . . . . . Adjust cam 3 or replace servomotor
control box terminals 10-8
After pre-purge and safety time,
the burner goes to lock-out and
the flame does not appear
24 - The solenoid VR allows little gas through . . . . . . . . . . . . . . Increase
25 - Solenoid valves VR or VS fail to open . . . . . . . . . . . . . . . . Renew the coil or rectifier panel
26 - Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase pressure at governor
27 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . . Adjust, see fig. (B)p. 16
28 - Electrode grounded due to brocken insulation . . . . . . . . . . Replace
29 - High voltage cable defective . . . . . . . . . . . . . . . . . . . . . . . . Replace
30 - High voltage cable deformed by high temperature . . . . . . . Replace and protect
31 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . Replace
32 - Erroneous valve or transformer electrical connections . . . . Repeat connection
33 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
34 - A cock down-line of the gas train is closed . . . . . . . . . . . . . Open
35 - Air in pipework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bleed air
The burner goes to lock-out
right after flame appearance
36 - The solenoid VR allows little gas through . . . . . . . . . . . . . . Increase
37 - Ionisation probe wrongly adjusted. . . . . . . . . . . . . . . . . . . . Adjust, see fig. (B)p.16
38 - Faulty electrical connection for probe . . . . . . . . . . . . . . . . . Repeat connection
39 - Insufficient ionisation (less than 6 ±A). . . . . . . . . . . . . . . . . Check probe position
40 - Probe grounded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
41 - Max. gas pressure switch operates. . . . . . . . . . . . . . . . . . . Adjust or replace
42 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
The burner repeats the starting
cycle without lock out
43 - Mains gas pressure is near the valve to which the . . . . . . . Reduce operating pressure of minimum gas
min. gas pressure switch gas is adjusted. The
pressure switch.
repeated drop in pressure which follows valve
Replace gas filter.
opening causes temporary opening of the pressure
switch itself, the valve immediately closes and the
burner comes to a halt. Pressure increases again,
the pressure switch closes again and the firing cycle
is repeated. The sequence repeats endlesly.
Lock out without symbol indication 44 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
During operation, the burner
stops in lock out
45 - Probe or ionisation cable grounded . . . . . . . . . . . . . . . . . . Replace worn parts
46 - Fault on air pressure switch . . . . . . . . . . . . . . . . . . . . . . . . Replace
47 - Max. gas pressure switch operates. . . . . . . . . . . . . . . . . . . Adjust or replace
Lock out when burner stops
48 - Flame remains in combustion head . . . . . . . . . . . . . . . . . . Eliminate persistence of flame
or flame simulation
or replace control box
Ignition with pulsation
49 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see page 18 and 30
50 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . . Adjust, see fig. (B)p.16
51 - Poorly adjusted fan air gate: too much air. . . . . . . . . . . . . . Adjust
52 - Output during ionisation phase is too high . . . . . . . . . . . . . Reduce
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