Riello GAS 9/2, Installation, Use And Maintenance Instructions

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FAULTS - POSSIBLE CAUSES - SUGGESTED REMEDY
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 fuses blown . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
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 - Defective capacitor (GAS 3/2 - 4/2) . . . . . . . . . . . . . . . . . . Replace
11 - Defective motor remote control switch (GAS 5/2 - 6/2 - 7/2 - 9/2) Replace
12 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
13 - Motor protection tripped (GAS 5/2 - 6/2 - 7/2 - 9/2) . . . . . . . Reset thermal cut-out when third phase
is re-connected
The disk 2) keeps on rotating 14 - Air pressure switch in operating position Adjust or replace
The burner starts and
then locks out 15 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
Air pressure switch inoperative due to
insufficient air pressure:
16 - Air pressure switch adjusted badly . . . . . . . . . . . . . . . . . . . Adjust or replace
17 - Pressure switch pressure point pipe blocked . . . . . . . . . . . Clean
18 - Head wrongly adjusted . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
19 - High negative draft in chamber . . . . . . . . . . . . . . . . . . . . . . . . . .Ask our technical office
20 - Fault in flame detection circuit . . . . . . . . . . . . . . . . . . . . . . Replace control box
21 - Servomotor does not open the air gate valve in stage 2 . . Replace
22 - VS and VR gas valves unconnected or with interrupted coil . . Check connections or replace coil
After pre-purge and
safety time,
the burner goes to lock-out
and the flame does not appear 23 - The solenoid VR allows little gas through. . . . . . . . . . . . . . Increase
24 - Solenoid valves VR or VS fail to open . . . . . . . . . . . . . . . . Renew the coil or rectifier panel
25 - Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase pressure at governor
26 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.8
27 - Electrode grounded due to broken insulation . . . . . . . . . . . Replace
28 - High voltage cable defective. . . . . . . . . . . . . . . . . . . . . . . . Replace
29 - High voltage cable deformed by high temperature. . . . . . . Replace and protect
30 - Ignition transformer defective . . . . . . . . . . . . . . . . . . . . . . . Replace
31 - Erroneous valve or transformer electrical connections. . . . Check
32 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
33 - A cock down-line of the gas train is closed. . . . . . . . . . . . . Open
34 - Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bleed air
The burner goes to lock-out
right after flame appearance 35 - The solenoid VR allows little gas through. . . . . . . . . . . . . . Increase
36 - Ionisation probe wrongly adjusted . . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.8
37 - Faulty electrical connections for probe . . . . . . . . . . . . . . . . Repeat connection
38 - Insufficient ionisation (less than 5

A) . . . . . . . . . . . . . . . . Check probe position
39 - Probe grounded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
40 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . . . . . . . . . Check grounding
41 - Phase and neutral wires inverted . . . . . . . . . . . . . . . . . . . . Correct by intervention
42 - Servomotor does not open the air gate valve in stage 1 . . Replace
43 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
The burner repeats
the starting cycle
without lock out 44 - Mains gas pressure is near the value to which the. . . . . . . Reduce operating pressure
min. gas pressure switch gas is adjusted. The of minimum gas 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 endlessly.
Ignition with pulsation 45 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see p.9
46 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.8
47 - Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . Adjust
48 - Output during ignition phase is too high . . . . . . . . . . . . . . . Reduce
Burner remain in stage 1 49 - Remote control device TR does not close . . . . . . . . . . . . . Adjust or replace
50 - Servomotor red lever precedes orange lever . . . . . . . . . . . Adjust
51 - Servomotor does not open the air gate valve in stage 2 . . Replace
Burner operates in stage 1 with gas and in
stage 2 with air 52 - Red lever precedes black lever . . . . . . . . . . . . . . . . . . . . . Adjust
53 - Defective servomotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
Burner locks out at transition
between 1st and 2nd stage or
between 2nd and 1st stage 54 - Too much air or too little gas. . . . . . . . . . . . . . . . . . . . . . . . Adjust air and gas
During operation, the burner stops in lock out 55 - Probe or ionisation cable earthed . . . . . . . . . . . . . . . . . . . Replace worn parts
56 - Fault on air pressure switch . . . . . . . . . . . . . . . . . . . . . . . . Replace
Lock out when burner stops 57 - Flame remains in combustion head . . . . . . . . . . . . . . . . . . Eliminate persistence of flame
or flame simulation or replace control box
Burner stops with air gate valve open 58 - Servomotor faulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace