17
SIGNAL
FAULT
PROBABLE CAUSE
SUGGESTED REMEDY
2 pulses
Once the pre-purging
phase and safety time
have passed, the burner
goes into lockout without
the appearance of the
flame
1
- The train lets a small quantity of gas through.. . . . . . . . . . Check the adjustment on the Multibloc
2
- The train does not open. . . . . . . . . . . . . . . . . . . . . . . . . . . Substitute the coil
3
- Gas pressure too low. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Check the adjustment on the Multibloc
4
- Ignition electrode badly adjusted. . . . . . . . . . . . . . . . . . . . . Adjust it (see fig. (D)page 6)
5
- Electrode grounded due to broken insulation . . . . . . . . . . . Replace
6
- Faulty high voltage cable. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
7
- High voltage cable deformed by high temperature . . . . . . . Replace and protect
8
- Ignition transformer defective. . . . . . . . . . . . . . . . . . . . . . . . Replace it
9
- Wrong electrical wirings of valves or transformer.. . . . . . . . Check them
10 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
11 - A closed valve up-line from the gas train. . . . . . . . . . . . . . Open it
12 - Air in pipework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bleed air
13 - Trains not connected, or with coil blocked.. . . . . . . . . . . . . . . . .Check connections or replace coil
3 flashes
The burner does not
switch on, and the lockout
appears
14 - Air pressure switch in operating position . . . . . . . . . . . . . . Adjust or replace
The burner switches on,
but then stops in lockout
Air pressure switch inoperative due to
insufficient air pressure:
15 - Air pressure switch adjusted badly. . . . . . . . . . . . . . . . . . . . Adjust or replace
16 - Pressure switch pressure point pipe blocked. . . . . . . . . . . . Clean
17 - Head wrongly adjusted.. . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
18 - High depression in the furnace. . . . . . . . . . . . . . . . . . . . . . Connect air pressure switch to fan suction line
Lockout during pre-purg-
ing phase
19 - Faulty capacitor (RS 34 - 44/M MZ single-phase).. . . . . . . Replace it
20 - Faulty motor command contactor (RS 44/M MZ three-phase).Replace it
21 - Defective electrical motor. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
22 - Motor lockout (RS 44/M MZ three-phase). . . . . . . . . . . . . . Release thermal cutout on three-phase return
line
4 flashes
The burner switches on,
but then stops in lockout
23 - Permanent flame in the combustion head or . . . . . . . . . . .
simulation of flame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Eliminate permanency of flame
Lockout when burner
stops
24 - Permanent flame in the combustion head or . . . . . . . . . . .
simulation of flame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Eliminate permanency of flame
7 flashes
The burner goes into lock-
out immediately following
the appearance of the
flame
25 - The train lets a small quantity of gas through.. . . . . . . . . . Check the adjustment on the Multibloc
26 - Ionisation probe poorly adjusted. . . . . . . . . . . . . . . . . . . . . Adjust it, see fig. (D)page 6
27 - Insufficient ionisation (lower than 5
µ
A). . . . . . . . . . . . . . . . Check probe position
28 - Probe grounded. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
29 - Insufficient earthing of the burner. . . . . . . . . . . . . . . . . . . . . Correct the earthing
30 - Phase and neutral connections inverted. . . . . . . . . . . . . . . Invert them
Lockout of burner upon
transit between 1° and
2° stage, or between 2°
and 1° stage
31 - Too much air or too little gas. . . . . . . . . . . . . . . . . . . . . . . . Adjust air and gas
Burner goes into lockout
during operation
32 - Probe or ionisation cable grounded. . . . . . . . . . . . . . . . . . Replace worn parts
33 - Fault on air pressure switch. . . . . . . . . . . . . . . . . . . . . . . . . Replace
10 pulses
The burner does not
switch on, and the lockout
appears
34 - Erroneous electrical connections. . . . . . . . . . . . . . . . . . . . . Check connections
The burner goes into lock-
out
35 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
No led pulse
The burner does not start
36 - No electrical power supply. . . . . . . . . . . . . . . . . . . . . . . . . . Close all switches - Check connections
37 - A thermostat/limit or safety pressure switch is open. . . . . . Adjust it, or replace it
38 - Line fuse blocked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
39 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
40 - No gas supply.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open the manual valves between meter and
train
41 - Mains gas pressure insufficient. . . . . . . . . . . . . . . . . . . . . . Contact your GAS COMPANY
42 - Minimum gas pressure switch fails to close. . . . . . . . . . . . . Adjust or replace
43 - Servomotor does not move into St1 position. . . . . . . . . . . . Replace it
The burner continues to
repeat the start-up cycle,
without lockout
44 - Mains gas pressure is near the value . . . . . . . . . . . . . . . . . Reduce operating pressure
on which the min. gas pressure switch gas is adjusted.
of minimum gas pressure switch
The 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 endlessly.
Ignition with pulsation
45 - Head poorly adjusted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust it (see page 7)
46 - Ignition electrode badly adjusted. . . . . . . . . . . . . . . . . . . . . Adjust it, see fig. (D)page 6
47 - Poorly adjusted fan air gate: too much air. . . . . . . . . . . . . . Adjust
48 - Output during ignition phase is too high. . . . . . . . . . . . . . . . Reduce
The burner does not
move into the 2° stage
49 - Thermostat/TR pressure switch does not close. . . . . . . . . . Adjust it or replace it
50 - Defective control box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
51 - Faulty servomotor.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
Burner stops with air
damper open
52 - Faulty servomotor.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace it
Summary of Contents for 3788710
Page 1: ...END VALIDITY DATE 12 06 2007 ...
Page 64: ...20 RS 34 M MZ ...
Page 65: ...21 RS 44 M MZ 1Ph ...
Page 66: ...22 RS 34 44 M MZ 1Ph ...
Page 67: ...23 RS 44 M MZ 3Ph ...
Page 68: ...24 RS 44 M MZ 3Ph ...
Page 69: ...25 RS 34 44 M MZ 1Ph 3Ph ...
Page 70: ...26 RS 34 44 M MZ 1Ph 3Ph ...