Gas Oil Operation - Riello RLS 300/BP MX Installation, Use And Maintenance Instructions

8.1

Gas oil operation

SYMBOL FAULT
The burner does not start
The burner does not start and
a function lock-out occurs
The burner starts but stops at
maximum air damper setting
The burner starts and then
P
goes into lock-out
The burner starts and then
goes into lock-out
The burner remains in pre-
purging phase
After pre-purge and the safety
1
time, the burner goes to lock-
out and the flame does not
appear
1
The flame ignites normally but
the burner locks out when the
safety time has elapsed
20036762
Faults - Probable causes - Solutions
PROBABLE CAUSE
A limit or safety control device is open
Control box lock-out
Fan motor blocked
Oil pressure switch intervenes
No electrical power supply
No gas oil
Control box fuse blown
Pump is jammed
Defective motor command control device
Defective control box
Defective electrical motor
The pilot burner does not work
Defective safety solenoid valve
Defective oil modulator
Flame simulation
Photocell short-circuit
2-phase power supply thermal relay trips
Contact 1 of servomotor does not operate
Air pressure switch adjusted badly
Pressure switch pressure point pipe blocked
Fault in flame detection circuit
Contact III of servomotor does not operate
The solenoid VP1 allows little gas through
Solenoid valves VP1 or VP2 fail to open
No fuel in tank; water on tank bottom
Inappropriate head and air gate valve adjust-
ments
High voltage cable defective or grounded
High voltage cable deformed by high tempera-
ture
Erroneous valves or transformer electrical con-
nections
Pump unprimed
Pump suction line connected to return line
Filters dirty (on line 1 at the nozzle)
Valves up-line from pump closed
Incorrect motor rotation direction
Gas oil solenoid valves fail to open
Nozzle clogged, dirty, or deformed
The pilot burner does not work
Defective control box
Ignition electrode wrongly adjusted
Grounded electrode due to broken insulation
Pump/motor coupling broken
Ignition transformer defective
Defective photocell or control box
Dirty photocell
36 GB
SUGGESTED REMEDY
Adjust or replace
Reset
Reset thermal cut-out
Adjust pressure switch or eliminate
overpressure
Close all switches - Check connec-
tions
Check the gas oil supply circuit
Replace
Replace
Replace
Replace
Replace
Check
Replace
Recondition or replace
Replace control box
Replace photocell
Reset thermal cut-out when third
phase is re-connected
Adjust cam I or replace servomotor
Adjust
Clean
Replace control box
Adjust cam III or replace servomo-
tor
Increase
Renew the coil or rectifier panel
Top up fuel level or suck up water
Adjust
Replace
Replace and protect
Check
Prime
Correct connection
Clean
Open
Change motor electrical connec-
tions
Check the connections and the
solenoid valves
Clean or replace
Check
Replace
Adjust
Replace
Replace
Replace
Replace photocell or control box
Clean