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2915858
Faults - Possible causes - Solutions
Tab. N
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
Filter or eliminate
Presence of electromagnetic disturbance Use the radio disturbance protec-
tion kit
No blink The burner does not
start
No electrical power supply Check connections
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 gas pressure switch has
been set. The sudden drop in pressure after valve
opening causes temporary opening of the pres-
sure switch itself, the valve immediately closes
and the burner comes to a halt. Pressure increas-
es 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
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