Riello GS20 - Burner Starting Difficulties (Signal Breakdown)

2754
10
GB
BURNER STARTING DIFFICULTIES
Signal Problem Possible cause Recommended remedy
2 blinks Once the pre-purging
phase and safety time
have passed, the
burner goes into lock-
out without the appear-
ance of the flame
1 - The operation solenoid lets little gas . . . .
through
Increase
2 - One of the two solenoid valves does . . . .
not open.
Replace
3 - Gas pressure too low . . . . . . . . . . . . . . . . Increase pressure at governor
4 - Ignition electrode incorrectly adjusted . . . Adjust, see page 4
5 - Electrode grounded due to broken. . . . . .
insulation
Replace
6 - High voltage cable defective . . . . . . . . . . Replace
7 - High voltage cable deformed by high. . . .
temperature
Replace and protect
8 - Ignition transformer defective. . . . . . . . . . Replace
9 - Incorrect valve or transformer electrical . .
wiring
Check
10 - Defective control box . . . . . . . . . . . . . . . . Replace
11 - A closed valve upline the gas train. . . . . . Open
12 - Air in pipework . . . . . . . . . . . . . . . . . . . . . Bleed air
13 - Gas valves unconnected or with . . . . . . .
interrupted coil
Check connections or replace coil
3 blinks 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 incorrectly adjusted. . Adjust or replace
16 - Pressure switch pressure test point . . . . .
pipe blocked
Clean
17 - Poorly adjusted head . . . . . . . . . . . . . . . . Adjust
18 - High pressure in the furnace . . . . . . . . . . Connect air pressure switch to fan
suction line
Lockout during pre-
purging phase
19 - Defective motor control contactor. . . . . . .
(only three-phase version)
Replace
20 - Defective electrical motor. . . . . . . . . . . . . Replace
21 - Motor lockout (defective electrical motor). Replace
4 pulses The burner switches
on, but then stops in
lockout
22 - Flame simulation . . . . . . . . . . . . . . . . . . . Replace the control box
Lockout when burner
stops
23 - Permanent flame in the combustion. . . . .
head or flame simulation
Eliminate persistence of flame or
replace control box
7 blinks The burner goes into
lockout immediately
following the appear-
ance of the flame
24 - The operation solenoid lets little. . . . . . . .
gas through
Increase
25 - Ionisation probe incorrectly adjusted . . . . Adjust, see page 4
26 - Insufficient ionisation (less than 5 A) . . . . Check probe position
27 - Earth probe. . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
28 - Burner poorly grounded . . . . . . . . . . . . . . Check grounding
29 - Phase and neutral connections inverted . Invert them
30 - Defective flame detection circuit. . . . . . . . Replace the control box
Burner goes into lock-
out during operation
31 - Probe or ionisation cable grounded . . . . . Replace worn parts
10 blinks The burner does not
switch on, and the
lockout appears
32 - Incorrect electrical wiring . . . . . . . . . . . . . Check
The burner goes into
lockout
33 - Defective control box . . . . . . . . . . . . . . . . Replace
34 - Presence of electromagnetic . . . . . . . . . .
disturbances in the thermostat lines
Filter or eliminate