Maintenance Fuel Oil - Cuenod C 120 Instrucciones De Montaje

Fuel oil maintenance
· Check the following if failure occurs :
– power supply (power and control),
– fuel supply (valve pressure and
opening),
– control components,
– switch positions on TC control
panel.
Symbol Fault
w
Burner on safety lockout
Fan motor not working
contactor open
P Fan motor not working
z
Fan motor working
1 No ignition arc
Electromagnetic valves not opening
Electromagnetic valves opening
electrically
Burner lights up, but flame is unstable
and goes out
I Burner on continuous ventilation but no
x
flame
v
Other incidents
Sudden lockout at any time, not
indicated by any symbol
48
If problem persists :
· Check various program symbols
described herebelow on the control
and safety unit.
Safety components must not be
repaired but replaced by similar items.
m
Only use
manufacturer spare parts.
Cause
Parasitic flame on thermostatic cut-off
Faulty air pressure
Thermal relay cut out
Faulty contactor
Faulty wiring between contactor and motor
Faulty motor
Misadjusted or faulty air pressure switch
Faulty flame monitoring circuit
Ignition electrodes short-circuiting
Damaged ignition cables
Faulty ignition transformer
Control and safety unit
Electrical connections broken
Coil(s) short-circuiting
Mechanical jamming in valves
Fuel not getting through
Air flap too open and/or fuel oil flow too
high
Misadjusted combustion head
Faulty servomotor
Mechanical jamming of air flap
Faulty mechanical coupling
Premature flame signal
Old cell
05/2006 - Art. Nr. 13 013 500B
Note
After each operation :
· Check combustion and all circuits for
possible leaks.
· Perform safety check-up.
· Record results in the relevant
documents.
Corrective action
Check fuel valves for leaks
Fit a postventilation device
Replace air pressure switch
Reset, adjust or change thermal relay
Change contactor
Check wiring
Replace motor
Adjust or replace air pressure switch
Check pressure pipes
Check if cell is clean
Change control and safety unit
Adjust or replace electrodes
Replace ignition cables
Replace ignition transformer
Change control unit
Check wiring between unit, servomotor and
motor pump
Change coil(s)
Change valve(s)
Check fuel oil level in tank, control valve and
prefilter opening
Check piping vacuum, spray pressure and
booster pump
Clean pump and prefiltering filter
Replace nozzles, pump, coupling, motor
pump motor and hoses
Adjust air flap and/or fuel oil flow rate
Adjust combustion head
Adjust or change servomotor
Unblock air flap
Check or change coupling
Change control and safety unit
Change cell