Riello RS 70 Manuel D'entretien page 39

COLOUR
FAULT
(1)
The burner does not start
The disk 2) keeps on rotating
BLUE The burner starts
and then locks out
YELLOW After pre-purge and
safety time,
the burner goes tolock-out
and the flame does not appear
YELLOW The burner goes to lock-out
right after flame appearance
The burner repeats
the starting cycle
without lock out
Ignition with pulsation
RED The burner does not pass
GREEN to 2nd stage
Burner locks out at transition
between 1st and 2nd stage or
between 2nd and 1st stage
During operation, the
burner stops in lock out
Lock out when burner stops
Burner stops with air gate valve
open
(1) The control box 1) is equipped with a disk 2) that rotates during the starting phase and is visible from the lower side of control box.
When the burner does not start, or locks out, because of a fault, the color which appears in correspondance with index 3) signals the kind of inconvenience.
PROBABLE CAUSE
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 motor remote control switch . . . . . . . . . . . . . . . . Replace
11 - Defective electrical motor. . . . . . . . . . . . . . . . . . . . . . . . . . Replace
12 - Motor protection tripped. . . . . . . . . . . . . . . . . . . . . . . . . . . Reset thermal cut-out when third phase
13 - Air pressure switch in operating position
14 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace control box
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 negative draft in chamber . . . . . . . . . . . . . . . . . . . . . . . . . . Connect air pressure switch to fan suction inlet
19 - Fault in flame detection circuit . . . . . . . . . . . . . . . . . . . . . . Replace control box
20 - VS and VR gas valves unconnected or with interrupted coil . . Check connections or replace coil
21 - The solenoid VR allows little gas through . . . . . . . . . . . . . Increase
22 - Solenoid valves VR or VS fail to open . . . . . . . . . . . . . . . . Renew the coil or rectifier panel
23 - Gas pressure too low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Increase pressure at governor
24 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.12
25 - Electrode grounded due to brocken insulation. . . . . . . . . . Replace
26 - High voltage cable defective . . . . . . . . . . . . . . . . . . . . . . . Replace
27 - High voltage cable deformed by high temperature . . . . . . Replace and protect
28 - Ignition trasformer defective. . . . . . . . . . . . . . . . . . . . . . . . Replace
29 - Erroneous valve or trasformer electrical connections . . . . Check
30 - Control box defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
31 - A cock down-line of the gas train is closed . . . . . . . . . . . . Open
32 - Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bleed air
33 - The solenoid VR allows little gas through . . . . . . . . . . . . . Increase
34 - Ionisation probe wrongly adjusted . . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.12
35 - Faulty electrical connections for probe . . . . . . . . . . . . . . . Repeat connection
36 - Insufficient ionisation (less than 5 µA) . . . . . . . . . . . . . . . . Check probe position
37 - Probe grounded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
38 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . . . . . . . . . Check grounding
39 - Phase and neutral wires inverted . . . . . . . . . . . . . . . . . . . Correct by interventing
40 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
41 - Mains gas pressure is near the value to which the . . . . . . Reduce operating pressure
min. gas pressure switch gas is adjusted. The
repeated drop in pressure which follows valve
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.
42 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.14
43 - Ignition electrode wrongly adjusted . . . . . . . . . . . . . . . . . . Adjust, see fig. (C)p.12
44 - Poorly adjusted fan air gate: too much air . . . . . . . . . . . . . Adjust
45 - Output during ignition phase is too high . . . . . . . . . . . . . . Reduce
46 - Remote control device TR does not close . . . . . . . . . . . . . Adjust oe replace
47 - Defective control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
48 - Servomotor faulty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
49 - Too much air or too little gas . . . . . . . . . . . . . . . . . . . . . . . Adjust air and gas
50 - Probe or ionisation cable grounded . . . . . . . . . . . . . . . . . Replace worn parts
51 - Fault on air pressure switch . . . . . . . . . . . . . . . . . . . . . . . . Replace
52 - Flame remains in combustion head . . . . . . . . . . . . . . . . . . Eliminate persistence of flame
or flame simulation
53 - Sevomotor faulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace
39
SUGGESTED REMEDY
is re-connected
Adjust or replace
of minimum gas pressure switch.
Replace gas filter
or replace control box