87
12.5 Pellet Feed Tube Thermostat
Primary fault
Secondary follow on checks
BLANK DISPLAY SCREEN
When pellet feed
tube has cooled
- does pressing
RESET button
on stat correct
the fault?
Yes
Yes
No
No
No
No
No
No
Is the pellet
delivery hose
damaged?
Is the pellet
delivery hose
air tight at both
ends?
Is the ash pan
overflowing?
Is there a build
up of ash on
the combustion
chamber baffle?
Is the
combustion
chamber
draught
correct?
Is the condensate
trap and/or
discharge pipe
blocked or
frozen?
Is the flue used
the correct type?
Is it correctly
installed and not
blocked?
Is the flue fan
(in flue fan box)
operational and
clean?
Is the room
ventilation
adequate?
Is the mains water
supply to boiler
connected and
switched on?
Is the boiler wash
system operating
correctly when
tested (using the
test switch)?
Is the shaker
cleaning system
operating correctly
when tested (using
the test switch)?
Is the boiler
cleaning interval
correctly set?
Is the duration
of the boiler
cleaning period
correctly set?
Replace pellet
delivery hose
Correctly fit
pellet delivery
hose or replace
if necessary
Clean out the ash
pan and boiler.
Clean all ash from
the combustion
chamber baffle
Check the
switched live
supply to hopper/
boiler and rectify
as necessary
Clean condensate
trap and pipe to
clear blockage
Rectify or replace
flue if necessary.
Remove any flue
blockage
PELLET FEED TUBE STAT TRIPPED
No
Yes
No
No
Note 1
Note 3
Note 3
Note 4
Note 5
Note 6
Note 7
Note 8
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Is the lead correctly
connected?
Is there continiuty
between the
terminals?
Replace pellet
feed tube stat
No
Note 2
Check that
manifold jets are
clear?
Yes
No
No
No
No
No
No
Unblock or
increase
ventilation as
required
Connect the
mains water
supply and
switch on
Is solenoid
valve operating
correctly?
Check operation
of cleaning motor
and shaker
mechanism
In burner menu
reset ‘TIME
CLEAN BRAZIER’
and ‘TIME CLEAN
BOILER’ settings
In burner menu
reset ‘TIME CLEAN
PERIOD’ setting
Note 9
Note 10
Note 10
Note 6
Note 11
Note 11
Rectify fan fault
or replace if
necessary.
Clean fan if
required
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