F:\C - E\ECOMAX\COAL BOILER\Instructions and Manuals\Coal Boiler Manual Rev 6.doc
Page
30
of 36
Observed Fault
Possible Cause
Solution
Tension clip
broken
Check to see if Coal Feed Screw has jammed
before replacing.
Motor thermal
overload tripped
If the Coal Feed Screw is jammed and for
some reason the tension clip doesn’t break, the
resultant load on the motor can cause the
thermal overload to trip. This can be an
indicator of jamming, a worn Coal Feed Screw,
no oil in the gearbox or many other problems.
Ensure the cause is identified before resetting
the switch.
Coal Feed
Screw worn out
Using wet coal or having a blocked Smoke
Back Tube can cause condensation in the Coal
Feed Screw Pipe, which will wear out the
flights of the auger, jamming coal in the pipe
and causing the drive to seize. If the Coal Feed
Screw is worn (see
Yearly Maintenance
section) then it must be replaced
Smoke
observed at
cowl or
issuing from
Boiler or
Hopper
Smoke Back
Tube blocked
Remove Smoke Back Tube and check entire
length for blockages. Check connection point
on top of Coal Feed Screw Pipe and ensure it is
completely clear of fines.
Not enough air
for proper
combustion
-Open plate on Blower to allow more air in for
combustion
-Clean Heat Exchanger Tubes
-Clean flue and cowl
-Ensure area around appliance is completely
clear of anything that could interfere with air
flow
-Ensure room ventilation is adequate and not
blocked
-Clean Burn Pot and Retort
Damp coal
Never use damp coal. All damp coal must be
cleaned completely out of the Hopper, Coal
Feed Screw and Burn Pot and replaced with
fresh fuel. Ensure the holes in the Burn Pot
have not become blocked
Ash Valve not
closed/damaged
The Ash Valve must be completely closed with
no gaps, otherwise the Burn pot will not be
able to get enough air and poor combustion
will occur. If the Ash Valve is damaged and
there is a gap between it and the bottom of the
Burn Pot the Ash Valve will need to be
replaced.
