Trianco Contractor WM 70, User, Installation, Commissioning & Servicing Instructions, Page: 24 / 28

FAULT POSSIBLE CAUSE ACTION
POOR FLAME CUT-OFF Air in pump or at back of nozzle Bleed pump through pressure gauge port,
also check for leaks in oil line if 2-pipe system
Oil contaminated with water Run off oil at burner until free of water and
drain condensation from tank.
Dirt in solenoid valve Clean or replace valve.
Pump shut-off piston sticking Replace pump.
MORNING START LOCK-OUT Faulty non-return valve or air leak Replace none-return valve and cure leak.
in two pipe system.
Low voltage Check with local Electricity Board.
Combustion readings incorrect Check combustion under normal running
conditions and compare readings with
those given on page 16.
Oil level in tank falling below Raise tank or fit a 2-pipe system.
burner.
Nozzle partially blocked Replace nozzle
Oil pressure too low Check and recommission
Flue blocked or damaged Check and rectify
Pump coupling loose or worn Check and replace
BURNER STARTS VIOLENTLY Delayed ignition Check electrode setting and adjust to correct gap
Check electrodes for damage
Check H.T. leads for damage and positive connection
20
FAULT FINDING (continued)
DELAYED IGNITION -
BURNER PULSATES ON
START UP