Faults - Possible Causes - Solutions - Riello DB 12 LSM C13 Installation, Use And Maintenance Instructions

8

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.
GAS 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
The burner continues to repeat
the start-up cycle, without lockout
Burner goes into lockout during
operation
Lockout when the burner stops
20119307
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
• There is no gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Open the manual valves between the
• 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
• 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 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 connections. . .Redo them
• Defective control box. . . . . . . . . . . . . . . . . . . . . . . . .Replace
• A closed valve up-line from the gas train . . . . . . . . .Open it
• Air in pipework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bleed air
• The VR solenoid lets too little gas through. . . . . . . .Increase it
• Maximum gas pressure switch intervention . . . . . . .Adjust or replace
• Defective control box. . . . . . . . . . . . . . . . . . . . . . . . .Replace
• The gas pressure in the network is near the value. .Reduce the cut in pressure of the min.
on which the min. gas pressure switch . . . . . . . . . .gas pressure switch
is adjusted. The sudden fall in pressure that . . . . . .Replace the gas filter cartridge
follows the opening of the valve causes the
temporary opening of the pressure switch itself
immediately the valve closes and the burner stops.
The pressure starts to increase again. The pressure
switch closes and repeats the start up cycle.
The sequence repeats endlessly.
• Fault on air pressure switch . . . . . . . . . . . . . . . . . . .Replace
• Maximum gas pressure switch intervention . . . . . . .Adjust or replace
• Permanence of the flame in the head of . . . . . . . . .Eliminate the continuation of the flame
combustion simulation of flame . . . . . . . . . . . . . . . . .or replace control box
36
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
DANGER personnel, in accordance with the contents of this
manual and in compliance with the standards and
regulations of current laws.
Recommended remedy
contactor and the gas train
GB