Riello 564T31 Installation, Use And Maintenance Instructions page 57

Signal Problem
7 blinks The
into lockout imme-
diately following the
appearance of the
flame
Burner
lockout during ope-
ration
10 blinks The burner does not
switch on, and the
lockout appears
The
into lockout
No blink The burner does not
start
The burner conti-
nues to repeat the
start-up cycle, wi-
thout lockout
Ignition with pulsa-
tions
N.B.: If problems still occur after all of the above checks have been made, check the electrical connections
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.
Possible cause
burner goes 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
goes into Probe or ionisation cable grounded
Incorrect electrical wiring
burner goes Defective control box
Presence of electromagnetic 
disturbances in the thermostat lines
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
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 immedia-
tely closes and the burner comes to a halt.
Pressure increases again, the pressure
switch closes again and the ignition cycle
is repeated. And so on
Poorly adjusted head
Ignition electrode incorrectly adjusted
Incorrectly adjusted fan air damper: too
much air
Output during ignition phase is too high
13 GB
Recommended remedy
Increase
Adjust
Check probe position
Withdraw or replace cable
Check grounding
Invert them
Replace the control box
Replace worn parts
Check
Replace
Filter or eliminate
Close all switches - Check con-
nections
Adjust or replace
Replace
Replace
Open the manual valves betwe-
en contactor and train
Contact your GAS COMPANY
Adjust or replace
Reduce the minimum gas pres-
sure switch intervention pres-
sure. Replace the gas filter
cartridge.
Adjust
Adjust
Adjust
Reduce
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