31
20126064
GB
Faults - Possible causes - Solutions
If faults arise in ignition or operations, the burner performs a
"safety stop", which is signalled by the red burner lockout LED.
The display visualises alternately the lockout code and the rela-
tive diagnostic. To reset the start-up conditions, refer to the “Re-
set procedure” indicated in the control box manual supplied.
When the burner starts again, the red LED goes out and the con-
trol box is reset.
8
Faults - Possible causes - Solutions
WARNING
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row. If the burner
locks out for a third time, contact the customer
service.
DANGER
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
manual and in compliance with the standards and
regulations of current laws.
Problem
Possible cause
Recommended remedy
The burner does not start
No power supply
Turn off switches. Check wiring
A limit or safety remote control open
Adjust it or replace it
Flame control lockout
Release
Control box fuse broken
Replace it
Incorrect electrical wiring
Check connections
Defective flame control
Replace it
There is no gas
Open the manual valves between the contactor
and the gas train
Gas pressure in the network is not high enough Contact the gas company
Min. gas pressure switch does not close
Regulate it or replace it
Air pressure switch in operating position
Adjust it or replace it
The burner does not come on and
the lockout appears
Flame simulation
Replace the control box
The burner turns on and then
stops in lockout mode
Air pressure switch does not switch owing to lack of air pressure:
Air pressure switch is badly adjusted
Adjust it or replace it
Pressure socket tube of the pressure switch
clogged
Clean it
Head badly adjusted
Adjust it properly
The burner turns on and then re-
mains in lockout mode
Defective flame detection circuit
Replace control box
Once the pre-purging and the
safety time has elapsed the burner
goes into lockout without the flame
appearing
The VR solenoid lets too little gas through
Increase it
The VR or VS solenoid valve does not open
Replace the coil or the rectifier panel
Gas pressure too low
Increase pressure at regulator
The burner's pilot is not functioning
Check
Firing transformer defective
Replace it
Incorrect valve or firing transformer connec-
tions
Redo them
Defective control box
Replace
A closed valve up-line from the gas train
Open it
Air in pipework
Bleed air
Locks out with flame
The VR solenoid lets too little gas through
Increase it
Maximum gas pressure switch intervention
Adjust or replace
Defective control box
Replace