Riello RS5 Installation, Use And Maintenance Instructions page 31

SIGNAL PROBLEM
2 blinks Once the pre-purging
phase and safety time

have passed, the burner
goes into lockout with-
out the appearance of
the flame
3 blinks The burner starts and

then goes into lockout
Lockout during pre-
purging phase
4 blinks The burner starts and

then goes into lockout
Lockout when the burn-
er stops
5 lampeggi The burner does not

switch on, and the lock-
out appears
7 blinks The burner goes into

lockout immediately fol-

lowing the appearance
of the flame
Burner goes into lockout
during operation
10 blinks The burner does not
 
switch on, and the lock-
 
out appears
The burner goes into
lockout
Faults - Possible causes - Solutions
POSSIBLE CAUSE
The operation solenoid lets little gas through
The solenoid valve does not open
Gas pressure too low
Ignition electrode incorrectly adjusted
Electrode grounded due to broken insulation
High voltage cable defective
High voltage cable deformed by high tempera-
ture
Faulty ignition transformer
Incorrect valve or transformer electrical wiring
Defective control box
A closed valve upline the gas train
Air in pipework
Gas valve unconnected or with interrupted coil
Insufficient air
Air pressure switch poorly adjusted
Pressure switch pressure point pipe blocked
Combustion head poorly regulated
High pressure in the furnace
Defective motor control contactor
Defective electrical motor
Motor lockout
Flame simulation
Permanent flame in the combustion head or
flame simulation
Air pressure switch in operating position
The operation solenoid lets little gas through
Ionisation probe incorrectly adjusted
Insufficient ionisation (less than 5 µA)
Earth probe
Burner poorly grounded
Phase and neutral connections inverted
Defective flame detection circuit
Probe or ionisation cable grounded
Incorrect electrical wiring
Defective control box
Presence of electromagnetic disturbances in the
thermostat lines
Presence of electromagnetic disturbance
29 GB
RECOMMENDED REMEDY
Increase
Replace it
Increase pressure at governor
Adjust it
Replace
Replace
Replace and protect
Replace
Check
Replace
Open
Bleed air
Check connections or replace coil
Air pressure switch inoperative due
to pressure
Adjust or replace
Clean
Adjust
Connect air pressure switch to fan
suction line
Replace
Replace
Replace
Replace the control box
Eliminate persistence of flame or re-
place control box
Adjust or replace
Increase
Adjust
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace control box
Replace worn parts
Check
Replace
Filter or eliminate
Use the radio disturbance protection
kit
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