10:2 FAULT FINDING CHART
Page 28
IMPORTANT - Electrical Safety
IT IS ESSENTIAL THAT BEFORE ANY PANELS OR COMPONENTS ARE REMOVED FROM THE
BOILER, THAT THE MAINS ISOLATOR IS SWITCHED OFF.
Trouble or Complaint
Possible Cause
Action
1. Suspect oil supply No oil in tank Check and arrange for
tank to be filled if
necessary.
Supply valves closed Open all supply
valves.
Blockage in oil supply (Gravity head feed) Shut off the burner
isolating valve.
Disconnect the oil
supply at the pump
entry. Place
receptacle under the
pipe. Slowly open the
valve, note if the flow
is unrestricted,
restricted or blocked.
Wrong grade of oil Check for correct
grade of fuel (see
Technical Data).
Water contamination Open tank, drain
valve and check.
Tank vent blocked Check.
Filter blocked Check or water or
blockage.
Air locks in supply pipe Check for high points
in main oil supply.
Air lock in pump Bleed pump, check
flexible oil line.
2. Burner will not start Interruption or absence of electrical supply at
burner (check this at Control Box mains terminal
with test lamp)
Check mains switch
on. Check fuse in
switched spur or plug.
Check that time
switch or programmer
is closed. Check that
the auxiliary stat is
closed. Check boiler
stat, cylinder stat,
room stat are calling
for heat.
Control Box is locked out, refer to symptom 4 Press reset button on
the burner box.
Photo-resistor receiving false light Check that the photo-
resistor is fully home
in its housing. Burner
will not start with
illuminated cell.
Faulty control box Replace.
Pa
e 35 of 40Camra
5 External Boilers
14/04/2005file://D:\PL61000\PL61000.htm
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