Riello 20194153 Installation, Use And Maintenance Instructions page 37

Signal Problem
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
Faults - Possible causes - Solutions
Possible cause
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 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
Ignition electrode incorrectly adjusted
Incorrectly adjusted fan air damper: too much air
Output during ignition phase is too high
Remote control device TR fails to close
Defective control box
Defective servomotor
Defective servomotor
35 GB
Recommended remedy
Check
Replace
Filter or eliminate
Use the radio disturbance protec-
tion kit
Check connections
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
Adjust
Reduce
Adjust or replace
Replace
Replace
Replace
Tab. K
20194185