Faults/Suggested Remedies - Riello RX 350S/P Manuel D'entretien

FAULTS/SUGGESTED REMEDIES

The control box supplied performs a diagnostic role by means of which it is possible to easily identify the possible causes of any malfunctions (signal:
RED LED).
In order to use this function, it is necessary to wait at least ten seconds from the moment the control box is put in safety mode and press the lock-out reset
button for a minimum of three seconds.
Once the button has been released, the RED LED will start to flash, as illustrated in the diagram below.
RED LED on
wait at least 10 secs
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will provide the information on the possible faults, according to the table below.
Signal
Once the pre-purging phase
2 x blinks
and safety time have passed,
the burner goes into lockout
without the appearance of the
flame
The burner does not switch
3 x blinks
on, and the lockout appears
The burner starts and then
locks out
Lock-out during pre-purging
The burner starts and then
4 x blinks
locks out
Lock out when burner stops
The burner starts and then
6 blinks
locks out
The burner goes into lockout
7 x blinks
at the 4th attempt, immedi-
ately following the appear-
ance of the flame
Burner locks out at the 4th
attempt when shifting from
minimum to maximum output
and vice versa
When operating, the burner
goes into lockout at the 4
attempt.
Press button
for > 3 secs
Problem
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 fig. (D) page 6
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
14 - Check the ceramic of the electrode unit is not damaged
15 - Check there is no refractory material between the elec-
trodes, inside the combustion chamber . . . . . . . . . . . . .
16 - Check there is no condensation inside the protection on
the electrode unit connections . . . . . . . . . . . . . . . . . . . .
17 - Air pressure switch in operating position. . . . . . . . . . . . . Adjust or replace
- Air pressure switch inoperative due to insufficient air
pressure:
18 - Air pressure switch incorrectly adjusted. Adjust it . . . . . . Adjust or replace
19 - Pressure switch pressure test point pipe blocked . . . . . . Clean
20 - Poorly adjusted head . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust
21 - High pressure in the furnace . . . . . . . . . . . . . . . . . . . . . . Connect air pressure switch to fan suction line
22 - Defective motor control contactor . . . . . . . . . . . . . . . . . .
(only three-phase version)
23 - Defective electrical motor . . . . . . . . . . . . . . . . . . . . . . . . Replace
24 - Motor lockout (defective electrical motor) . . . . . . . . . . . . Replace
25 - Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace the control box
26 - Permanent flame in the combustion head or flame
simulation
27 - Defective or incorrectly adjusted servomotor . . . . . . . . . Adjust or replace
28 - The operation solenoid lets little gas through . . . . . . . . . Increase
29 - Ionisation probe incorrectly adjusted. . . . . . . . . . . . . . . . Adjust, see fig. (D) page 6
30 - Insufficient ionisation (less than 5 A). . . . . . . . . . . . . . . . Check probe position
31 - Earth probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
32 - Burner poorly grounded . . . . . . . . . . . . . . . . . . . . . . . . . Check grounding
33 - Phase and neutral connections inverted . . . . . . . . . . . . . Invert them
34 - Defective flame detection circuit . . . . . . . . . . . . . . . . . . . Replace control box
35 - Too much air or too little gas. . . . . . . . . . . . . . . . . . . . . . Adjust air and gas
36 - Probe or ionisation cable grounded . . . . . . . . . . . . . . . . Replace worn parts
th
Signal
Possible cause
36
Interval
Signal
3 secs
Suggested remedy
Replace it
Remove it
Check the gaskets are undamaged and the screws
are well tightened
Replace
Eliminate persistence of flame or replace control box