Riello 40 GS10 Instrucciones Para La Instalación, Uso Y Mantenimiento página 14

Signal Problem
The burner does not
switch on, and the
lockout appears
The burner switches
on, but then stops in
3 blinks
lockout
Lockout during pre-
purging phase
The burner switches
on, but then stops in
4 blinks
lockout
Lockout when burner
stops
The burner goes into
lockout immediately
7 blinks
following the appear-
ance of the flame
Burner goes into lock-
out during operation
The burner does not
switch on, and the
10 blinks
lockout appears
The burner goes into
lockout
20008491
Possible cause
Air pressure switch in operating position
Air pressure switch inoperative due to
insufficient air pressure:
Air pressure switch incorrectly adjusted.
Pressure switch pressure test point
pipe blocked
Poorly adjusted head
High pressure in the furnace
Defective motor control contactor (only
three-phase version)
Defective electrical motor
Motor lockout (defective electrical motor) Replace
Flame simulation
Permanent flame in the combustion
head or flame simulation
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 disturban-
ces in the thermostat lines
12 GB
Recommended remedy
Adjust or replace
Adjust or replace
Clean
Adjust
Connect air pressure switch to
fan suction line
Replace
Replace
Replace the control box
Eliminate persistence of flame
or replace control box
Increase
Adjust
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace the control box
Replace worn parts
Check
Replace
Filter or eliminate