Riello RS 55/M BLU Instrucciones De Instalación, Uso Y Mantenimiento página 34

Signal Problem
7 blinks The burner goes into
lockout immediately fol-
lowing the appearance
of the flame
Burner locks out when
shifting from minimum
to maximum output and
vice versa
Burner goes into lock-
out during operation
10 blinks The burner does not
switch on, and the lock-
out appears
The burner goes into
lockout
No blink The burner does not
start
The burner continues to
repeat the start-up cy-
cle, without lockout
Ignition with pulsations Poorly adjusted head
Burner does not reach
maximum output
Burner stops with air
damper open
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
WARNING contact the Aftersales Service.
20040559
Faults - Probable causes - Solutions
Possible cause
-The operation solenoid lets little gas through
Ionisation probe incorrectly adjusted
Insufficient ionisation (less than 5 A)
Earth probe
Burner poorly grounded
Phase and neutral connections inverted
Defective flame detection circuit
Too much air or too little gas
Probe or ionisation cable grounded
Incorrect electrical wiring
Defective control box
Presence of electromagnetic disturbances in the
thermostat lines
Presence of electromagnetic disturbance
No electrical power supply
A limiter or safety control device is open
Line fuse blocked
Defective control box
No gas supply
Mains gas pressure insufficient
Minimum gas pressure switch fails to close
Servomotor fails to move to min. ignition position Replace
The gas pressure in the gas mains lies very close
to the value to which the minimum gas pressure
switch has been set. The sudden drop in pressure
after valve opening causes temporary opening of
the pressure switch itself, the valve immediately
closes and the burner comes to a halt Pressure in-
creases again, the pressure switch closes again
and the ignition cycle is repeated. And so on
Ignition electrode incorrectly adjusted
Incorrectly adjusted fan air damper: too much air Adjust
Output during ignition phase is too high
Remote control device TR fails to close
Defective control box
Defective servomotor
Defective servomotor
32 GB
Recommended remedy
Increase
Adjust
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace the control box
Adjust air and gas
Replace worn parts
Check
Replace
Filter or eliminate
Use the radio disturbance protec-
tion kit
Close all switches - Check connec-
tions
Adjust or replace
Replace
Replace
Open the manual valves between
contactor and train
Contact your GAS COMPANY
Adjust or replace
Reduce the minimum gas pressure
switch intervention pressure. Re-
place the gas filter cartridge.
Adjust
Adjust it
Reduce
Adjust or replace
Replace
Replace
Replace
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
DANGER compliance with the laws and regulations current-
ly in force).
Tab. J