Fault - Probable Cause - Suggested Remedy - Riello GAS 3/2 Installation And Maintenance Manual

FAULT - PROBABLE CAUSE - SUGGESTED REMEDY

Signal
2 blinks Once the pre-purging
phase and safety time
have passed, the burner
goes into lockout without
the appearance of the
flame
3 blinks The burner does not
switch on, and the lockout
appears
The burner switches on,
but then stops in lockout
Lockout during pre-purg-
ing phase
4 pulses The burner switches on,
but then stops in lockout
Lockout when burner
stops
6 blinks The burner switches on,
but then stops in lockout
7 blinks The burner goes into lock-
out immediately following
the appearance of the
flame
Burner locks out when
shifting from minimum to
maximum output and vice
versa
Burner goes into lockout
during operation
10 blinks The burner does not
switch on, and the lockout
appears
The burner goes into lock-
out
Problem
1 - The operation solenoid lets little gas through. . . .
2 - One of the two solenoid valves does not open. . .
3 - Gas pressure too low . . . . . . . . . . . . . . . . . . . . . .
4 - Ignition electrode incorrectly adjusted . . . . . . . . .
5 - Electrode grounded due to broken insulation. . . .
6 - High voltage cable defective . . . . . . . . . . . . . . . .
7 - High voltage cable deformed by high temperature
8 - Ignition transformer defective . . . . . . . . . . . . . . . .
9 - Incorrect valve or transformer electrical wiring. . .
10 - Defective control box . . . . . . . . . . . . . . . . . . . . . .
11 - A closed valve upline the gas train. . . . . . . . . . . .
12 - Air in pipework . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 - Gas valves unconnected or with interrupted coil .
14 - Air pressure switch in operating position . . . . . . .
- Air pressure switch inoperative due to insufficient
air pressure:
15 - Air pressure switch incorrectly adjusted. . . . . . . .
16 - Pressure switch pressure test point pipe blocked
17 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . .
18 - High pressure in the furnace . . . . . . . . . . . . . . . .
19 - Defective motor control contactor. . . . . . . . . . . . .
(only three-phase version)
20 - Defective electrical motor . . . . . . . . . . . . . . . . . . .
21 - Motor lockout (defective electrical motor) . . . . . .
22 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . .
23 - Permanent flame in the combustion head or . . .
flame simulation
24 - Defective or incorrectly adjusted servomotor . . . .
25 - The operation solenoid lets little gas through. . . .
26 - Ionisation probe incorrectly adjusted . . . . . . . . . .
27 - Insufficient ionisation (less than 5 A) . . . . . . . . . .
28 - Earth probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . .
30 - Phase and neutral connections inverted . . . . . . .
31 - Defective flame detection circuit . . . . . . . . . . . . .
32 - Too much air or too little gas . . . . . . . . . . . . . . . .
33 - Probe or ionisation cable grounded . . . . . . . . . . .
34 - Incorrect electrical wiring . . . . . . . . . . . . . . . . . . .
35 - Defective control box . . . . . . . . . . . . . . . . . . . . . .
36 - Presence of electromagnetic disturbances in . . .
the thermostat lines
37 - Presence of electromagnetic disturbance . . . . . .
Possible cause
41
Recommended remedy
Increase
Replace
Increase pressure at governor
Adjust, see fig. (D) page 6
Replace
Replace
Replace and protect
Replace
Check
Replace
Open
Bleed air
Check connections or replace coil
Adjust or replace
Adjust or replace
Clean
Adjust
Connect air pressure switch to fan suc-
tion line
Replace
Replace
Replace
Replace the control box
Eliminate persistence of flame or
replace control box
Adjust or replace
Increase
Adjust, see fig. (D) page 6
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace the control box
Adjust air and gas
Replace worn parts
Check
Replace
Filter or eliminate
Use the radio disturbance protection kit
GB