Riello RLS 650/M MX, Installation, Use And Maintenance Instructions

Page: 43 / 60

41
20027761
GB
Faults - Probable causes - Solutions
8.1 Light oil operation
Symbol Problem Possible cause Recommended remedy
The burner does not start
Limiter or safety control device open Adjust or replace
Control box lockout Release
Fan motor lockout Release the thermal relay
Intervention of maximum oil pressure switch
Adjust the pressure switch or eliminate
overpressure
No electrical power supply Close all switches - check connections
No light oil Check the light oil supply circuit
Control box fuse interrupted Replace
Pump is jammed Replace
Faulty motor remote control switch Replace
Defective control box Replace
Faulty electrical motor Replace
The pilot burner does not work Check
Defective safety solenoid valve Replace
Faulty oil modulator Recondition or replace it
The burner does not
switch on, and the lock-
out appears
Flame simulation Replace the control box
Photocell short-circuit Replace photocell
Two-phase electrical supply, thermal relay
steps in Reset the thermal relay at return of the
three phases
The burner starts but
stops at maximum air
damper setting
Contact 1 of the servomotor terminals 9-8 con-
trol box does not intervene
Adjust cam I or replace servomotor
The burner switches on,
but then stops in lockout
Air pressure switch incorrectly adjusted Adjust it
Pressure switch pressure point pipe blocked Clean
The burner switches on,
but then stops in lockout
Failure to the flame detection circuit Replace control box
The burner remains in
pre-purging phase Contact III of the servomotor terminals 10-8
control box does not intervene
Adjust cam III or replace servomotor
Once the pre-purging
and the safety time has
elapsed the burner goes
into lockout without the
flame appearing
The VP1 solenoid lets too little gas through Increase
The solenoid VP1 or VP2 does not open Replace the coil or the rectifier panel
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
Soiled 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
Pilot burner does not work Check
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 Faulty photocell or control box Replace photocell or control box
Soiled photocell Clean
P
1