Riello 3756435, Инструкции по установке, использованию и обслуживанию

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7. FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for some problems that could cause a fail-
ure to start or a bad working of the burner. A fault usually makes the lock-out lamp light which is situated
inside the reset button of the control box (9, fig. 1, page 1).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the burner
functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
BURNER STARTING DIFFICULTIES
Signal Problem Possible cause Recommended remedy
2 blinks Once the pre-pur-
ging phase and sa-
fety time have
passed, the burner
goes into lockout
without the appea-
rance of the flame The operation solenoid lets little gas
through Increase
One of the two solenoid valves does
not open. Replace
Gas pressure too low Increase pressure at governor
Ignition electrode incorrectly adjusted Adjust
Electrode grounded due to broken
insulation Replace
High voltage cable defective Replace
High voltage cable deformed by high
temperature Replace and protect
Ignition transformer defective Replace
Incorrect valve or transformer
electrical wiring Check
Defective control box Replace
A closed valve upline the gas train Open
Air in pipework Bleed air
Gas valves unconnected or with
interrupted coil Check connections or replace
coil
3 blinks The burner does not
switch on, and the
lockout appears Air pressure switch in operating position Adjust or replace
The burner switches
on, but then stops in
lockout - Air pressure switch inoperative due to in-
sufficient air pressure:
Air pressure switch incorrectly adjusted.
Adjust or replace
Pressure switch pressure test point
pipe blocked Clean
Poorly adjusted head Adjust
High pressure in the furnace Connect air pressure switch to
fan suction line
Lockout during pre-
purging phase Defective motor control contactor
(only three-phase version) Replace
Defective electrical motor Replace
Motor lockout (defective electrical motor) Replace
4 pulses The burner switches
on, but then stops in
lockout Flame simulation Replace the control box
Lockout when bur-
ner stops Permanent flame in the combustion
head or flame simulation Eliminate persistence of flame
or replace control box