Riello FS15D Installation, Use And Maintenance Instructions page 56

Signal
7 blinks The burner goes into
lockout immediately
following the appear-
ance 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
lockout appears
The burner goes into
lockout
No blink The burner does not
start
The burner continues
to repeat the start-up
cycle, without lockout
Ignition with pulsations 45 - Poorly adjusted head . . . . . . . . . . . . . . . .
The burner does not
move into the 2nd
stage
Burner stops with air
damper open
N.B.: If problems still occur after all of the above checks have been made, check the electrical connec-
tions on the plug and sockets, the damper and burner motor, gas control wiring ignition transformer
and external interlocks, if the burner still fails to function, replace the control box.
2748
Problem
25 - The operation solenoid lets little gas . . . .
through
26 - Ionisation probe incorrectly adjusted . . . .
27 - Insufficient ionisation (less than 5 A) . . . .
28 - Earth probe . . . . . . . . . . . . . . . . . . . . . . .
29 - Burner poorly grounded . . . . . . . . . . . . . .
30 - Phase and neutral connections inverted .
31 - Defective flame detection circuit . . . . . . .
32 - Too much air or too little gas . . . . . . . . . .
33 - Probe or ionisation cable grounded . . . . .
34 - Incorrect electrical wiring . . . . . . . . . . . . .
35 - Defective control box . . . . . . . . . . . . . . . .
36 - Presence of electromagnetic . . . . . . . . . .
disturbances in the thermostat lines
37 - No electrical power supply. . . . . . . . . . . .
38 - A limiter or safety control device is open .
39 - Line fuse blocked. . . . . . . . . . . . . . . . . . .
40 - Defective control box . . . . . . . . . . . . . . . .
41 - No gas supply . . . . . . . . . . . . . . . . . . . . .
42 - Mains gas pressure insufficient . . . . . . . .
43 - Minimum gas pressure switch fails to . . .
close
44 - The gas pressure in the gas mains lies
very close to the value to which the mini-
mum gas pressure switch has been set.
The sudden drop in pressure after valve
opening causes temporary opening of the
pressure switch itself, the valve immedi-
ately closes and the burner comes to a
halt. Pressure increases again, the pres-
sure switch closes again and the ignition
cycle is repeated. And so on
46 - Ignition electrode incorrectly adjusted . . .
47 - Incorrectly adjusted fan air damper: too .
much air
48 - Output during ignition phase is too high .
49 - Remote control device TR fails to close .
50 - Defective control box . . . . . . . . . . . . . . . .
51 - Defective servomotor. . . . . . . . . . . . . . . .
52 - Defective servomotor. . . . . . . . . . . . . . . .
Possible cause
12 GB
Recommended remedy
Increase
Adjust, see page 4
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
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.
Replace the gas filter cartridge.
Adjust. See page 6
Adjust, see page 4
Adjust
Reduce
Adjust or replace
Replace
Replace
Replace