Trianco Combi 50 ECO, User, Installation, Commissioning & Servicing Instructions, Page: 36 / 44

9. FAULT FINDING
Burner
ELECTRICITY SUPPLY - before making any electrical checks, switch off mains supply to boiler.
FAULT POSSIBLE CAUSE ACTION
BURNER FAILS TO
Control box locked out - Light on Press control box reset button NB only try twice
START
Limit-stat tripped Press reset button under control panel and
check function of boiler control thermostat.
Boiler thermostat or other system Ensure all controls are calling for heat.
controls satisfied.
Fuse blown Fit new 5 amp fuse, if it blows again,
check for short circuit in wiring.
Check for live supply continuity If live supply confirmed,
up to burner change control box.
Motor or pump seized Check for rotation and replace as
necessary.
No oil supply Check oil level in tank and feed to burner.
Photo-cell not seeing flame Clean photo cell and ensure it is fully plugged in.
Air trapped in pump Bleed air through pressure gauge tapping.
Solenoid valve faulty Check coil for continuity and replace if faulty.
Nozzle blocked Replace nozzle with one of same specification.
Electrodes incorrectly set Reset gap and position electrodes as shown in
burner diagram.
Electrode insulator cracked Check and replace if insulator cracked
or crazed.
Ignition transformer and H.T. Check for spark and condition of
leads faulty contacts H.T. contacts. Replace as necessary.
Low oil pressure Check pump pressure and adjust to correct setting.
Oil contaminated with water Run off oil at burner until free of water and
drain condensation from tank.
Oil filter partially blocked Wash filter clean with kerosene.
Photo cell fault Clean photo-cell and ensure it is fully plugged in.
Replace if faulty.
Oil pressure low Check pump pressure and adjust to
correct setting.
33
BURNER STARTS
BUT FLAME NOT
ESTABLISHED
FLAME ESTABLISHED
BUT BURNER LOCKS
OUT AFTER FEW
SECONDS