Riello RLS 310/M MX, Modulating Operation

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20084880 48 GB
Faults - Possible causes - Solutions
Once the pre-purging
and the safety time has
elapsed the burner goes
into lockout without the
flame appearing No fuel in the tank, or water on the bottom Refill with fuel, or remove the water
Bad head and damper adjustments Adjust
Faulty or grounded high voltage cable Replace
High voltage cable deformed by high tempera-
ture
Replace and protect
Bad electrical wiring on valves or transformer Check
Pump unprimed
Prime it
Pump suction line connected to return line Correct connection
Dirty filters (nozzle line) Clean
The valves upstream from the pump are
closed
Open them
Opposite motor rotation Change electrical wiring to the motor
Light oil solenoids do not open
Check connections and
solenoids
Nozzle clogged, soiled or deformed Clean it or replace it
Defective control box Replace
Ignition electrode incorrectly adjusted Adjust it
Electrode grounded due to broken insulation Replace
Motor/pump coupling broken Replace
Faulty ignition transformer Replace
The flame ignites regu-
larly but the burner goes
into lock out at the end of
the safety time Control box defective Replace flame sensor or control box
Dirty flame sensor Clean
Insufficient detection current Measure current, replace flame sensor
Smoke in flame
(dark Bacharach) Little air Adjust the fan head and damper
Incorrect pump pressure Adjust
Nozzle filter clogged Clean or replace
Insufficient boiler room ventilation openings Increase
Dirty or worn nozzle Replace
Flame disk soiled, loose or deformed Clean it, tighten it or replace it
Smoke in flame
(yellow Bacharach)
Excessive air Adjust head and air dampers
Ignition with pulses or
flame failure, delayed
ignition Poorly adjusted head Adjust
Incorrectly adjusted fan air damper: too much
air
Adjust
Nozzle not fit for burner or boiler See the nozzle table
Faulty nozzle Replace
Unsuitable pump pressure Adjust
Ignition electrode not adjusted correctly or
soiled
Adjust it
Output during ionisation phase is too high Reduce
Uneven fuel supply Understand whether the cause lies in the
pump or the fuel supply system Supply fuel to the burner from a tank posi-
tioned near the burner itself
Internally rusted pump Water in the tank Remove the water with a pump
Noisy pump, unstable
pressure Air in the suction line Block the couplings
Depression value too high (higher than 35 cm Hg)
Excessive difference of level between burner
and tank
Power the burner from a loop circuit
Piping diameter too small Increase
Dirty suction line filters Clean
Suction line valves closed Open them
The paraffin solidifies due to the low tempera-
ture
Put additive in the light oil
LIGHT OIL OPERATION
Symbol
(1)
Problem Possible cause Recommended remedy
1