FAULT FINDING
(Continued)
FAULT
POSSIBLE CAUSE
ACTION
FIRE OUT
Chimney blockage continued.
To start boiler, push the Safety Switch reset
button and re-light fire if necessary.
(See Fig 2.)
Note:
If a flue blockage is not found, the
Safety Switch may have operated as a
result of persistent downdraught. If this is
the case, an anti-downdraught cowl should
be fitted to the top of the chimney such as
an ‘OH’ pot or similar, or extend the chimney
height above the pressure zone.
FAILURE TO REACH
Continuous fan blowing
Check that system is not in excess of boiler
THERMOSTAT SETTING
output.
Blockage in hopper.
Empty hopper and remove obstruction.
Clinker and ash build up in fire box.
Declinker firebed and if necessary re-light
boiler.
Fan runner blades choked.
Remove and clean.
Air control flap not opening
Remove fan and clean flap to ensure free
to “blast” setting.
operation.
BLOW BACK
Delayed ignition of flue gases.
Always recover fire to a bright condition as
quickly as possible after clinkering.
Incorrect declinkering
Ensure fire is recovered by turning on fan
for a few minutes both before and after
declinkering.
Over declinkering
Do not declinker more than two strokes at
any declinkering operation.
Hopper allowed to empty below fuel regulator
plate and then re-filled. Always keep hopper
topped up and never let fuel fall below fuel
regulator plate.
EXCESSIVE
No system controls.
Fit time-switch and room stat. to control
FUEL CONSUMPTION
heating pump for specific periods of the day.
Also fit thermostat radiator valves or zone
valves controlled by room stats..
Boiler thermostat sensing phial
Stop cause of draught and ensure stat. phial
chilled by a cold draught causing
is thermally insulated by the fibre glass
stat, to keep fan running.
blanket inside boiler casing.
Firebed partly choked with ash
Declinker firebed several times until live fire
and clinker causing fan to blow
is seen at front of bed. Also remove any
continuously in an attempt to
large clinkers that may have built-up at
reach stat. setting.
either side of fire-bed. Remember the more
fuel in combustion the quicker the fan is shut
off by the thermostat.
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