Faults - Possible Causes - Solutions - Riello DB 12 LM C10 Installation, Use And Maintenance Instructions

7

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.
OIL OPERATION
Problem
The burner does not start
The burner does not come on and
the lockout appears
The burner turns on and then
stops in lockout mode
The burner turns on and then
remains in lockout mode
Once the pre-purging and the
safety time has elapsed the
burner goes into lockout without
the flame appearing
Locks out with
flame
Burner goes into lockout during
operation
Lockout when the burner stops
Firing with pulses
Faults - Possible causes - Solutions
Possible cause
• 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
• Air pressure switch in operating position. . . . . . . . . Adjust or replace
• Flame simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . Replace the control box
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
• Defective flame detection circuit . . . . . . . . . . . . . . . Replace control box
• The VR solenoid lets too little fuel through. . . . . . . Increase it
• The VS solenoid valve does not open. . . . . . . . . . . Replace the coil or the panel
• Firing transformer defective. . . . . . . . . . . . . . . . . . . Replace it
• Incorrect valve or firing transformer connections. . Redo them
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . . Replace
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . . Replace
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . Replace
• Permanent flame in the head or flame simulation. . Eliminate permanency of flame or
combustion or flame simulation or
• Head badly adjusted. . . . . . . . . . . . . . . . . . . . . . . . Adjust it properly
• Fan air damper badly adjusted. Too much air. . . . . Adjust it
• Firing output too high. . . . . . . . . . . . . . . . . . . . . . . . Reduce it
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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
WARNING
service.
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
DANGER
manual and in compliance with the standards and
regulations of current laws.
rectifier
replace control box
GB
Recommended remedy
Tab. M
20198588