20040559
32
GB
Faults - Probable causes - Solutions
Tab. J
7 blinks
The burner goes into
lockout immediately fol-
lowing the appearance
of the flame
-The operation solenoid lets little gas through
Increase
Ionisation probe incorrectly adjusted
Adjust
Insufficient ionisation (less than 5 A)
Check probe position
Earth probe
Withdraw or replace cable
Burner poorly grounded
Check grounding
Phase and neutral connections inverted
Invert them
Defective flame detection circuit
Replace the control box
Burner locks out when
shifting from minimum
to maximum output and
vice versa
Too much air or too little gas
Adjust air and gas
Burner goes into lock-
out during operation
Probe or ionisation cable grounded
Replace worn parts
10 blinks
The burner does not
switch on, and the lock-
out appears
Incorrect electrical wiring
Check
The burner goes into
lockout
Defective control box
Replace
Presence of electromagnetic disturbances in the
thermostat lines
Presence of electromagnetic disturbance
Filter or eliminate
Use the radio disturbance protec-
tion kit
No blink
The burner does not
start
No electrical power supply
Close all switches - Check connec-
tions
A limiter or safety control device is open
Adjust or replace
Line fuse blocked
Replace
Defective control box
Replace
No gas supply
Open the manual valves between
contactor and train
Mains gas pressure insufficient
Contact your GAS COMPANY
Minimum gas pressure switch fails to close
Adjust or replace
Servomotor fails to move to min. ignition position Replace
The burner continues to
repeat the start-up cy-
cle, without lockout
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
Reduce the minimum gas pressure
switch intervention pressure. Re-
place the gas filter cartridge.
Ignition with pulsations
Poorly adjusted head
Adjust
Ignition electrode incorrectly adjusted
Adjust it
Incorrectly adjusted fan air damper: too much air Adjust
Output during ignition phase is too high
Reduce
Burner does not reach
maximum output
Remote control device TR fails to close
Adjust or replace
Defective control box
Replace
Defective servomotor
Replace
Burner stops with air
damper open
Defective servomotor
Replace
Signal
Problem
Possible cause
Recommended remedy
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).
