Riello RL BI0 - Faults - Possible Causes - Solutions

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Faults - Possible causes - Solutions
Find a list of faults, causes and possible solutions for a set of failures that may occur and result in irregular burner operation or no
functioning at all.
If a burner malfunction is detected, first of all:
• check that the electrical wiring is adequately connected;
• check whether fuel is delivered;
check that every adjustment parameter is adequately set.
9 Faults - Possible causes - Solutions
WARNING
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
contact the Aftersales Service.
DANGER
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
compliance with the laws and regulations current-
ly in force).
SYMBOL
(1)
FAULT PROBABLE CAUSE SUGGESTED REMEDY
The burner does not start A limit or safety control device is open Adjust or replace
Control box lock-out Reset control box
Oil pressure switch intervenes Adjust pressure switch or eliminate overpressure
Motor protection tripped Reset thermal cut-out
No electrical power supply Close all switches - Check connections
Control box fuse blown Replace
(2)
Contact II of servomotor does not operate Adjust cam II or replace servomotor
Pump is jammed Replace
Defective motor command control device Replace
Defective control box Replace
Defective electrical motor Replace
The burner does not start and
a function lock-out occurs
Flame simulation Replace control box
Photocell short-circuit Replace photocell
2- phase power supply thermal cut-out trips
Reset thermal cut-out when third phase is re-con-
nected
The burner starts but stops at
maximum air damper setting
Contact I of servomotor does not operate
Adjust cam I or replace servomotor control box
terminals 9-8
The burner starts and then
goes into lock-out
Fault in flame detection circuit Replace control box
The burner remains in pre-
purging phase
Contact III of servomotor does not operate
Adjust cam III or replace servomotor control box
terminals 10-8
After pre-purge and the safety
time, the burner goes to lock-
out and the flame does not
appear
No fuel in tank; water on tank bottom Top up fuel level or suck up water
Inappropriate head and air damper adjustments Adjust
Gas oil solenoid valves fail to open Check connections; replace coil
Nozzle clogged, dirty, or deformed Replace
Dirty or poorly adjusted firing electrodes Adjust or clean
Grounded electrode due to broken insulation Replace
High voltage cable defective or grounded Replace
High voltage cable deformed by high temperature Replace and protect
Ignition transformer defective Replace
Erroneous electrical connections of valves or
transformer
Check
Defective control box Replace
Pump unprimed Prime pump and see "Pump unprimes”
Pump/motor coupling broken Replace
Pump suction line connected to return line Correct connection
Valves up-line from pump closed Open
Filters dirty: line - pump - nozzle Clean
Incorrect motor rotation direction Change motor electrical connections
The flame ignites normally but
the burner locks out when the
safety time has elapsed
Defective photocell or control box Replace photocell or control box
Dirty photocell Clean
Firing with pulsations or flame
detachment, delayed firing
Poorly adjusted head Adjust
Poorly adjusted or dirty firing electrodes Adjust
Poorly adjusted fan air gate: too much air Adjust
Nozzle unsuited for burner or boiler See Nozzle Table
Defective nozzle Replace
Inappropriate pump pressure Adjust
1