26
LOCKOUT
INDICA
TED BY
RED LAMP
ON F
ASCIA
T
o
Re-set wait 2 minutes and press re-set button
Ignition failure
No oil delivery
from nozzle.
Check oil supply
at oil pump.
Air adjustment fault.
CO
2
should be
as specified in
tables 2 and 3.
Flame detection fault.
Oil at
oil pump.
No oil at
oil pump.
No oil in tank.
Check tank and
replenish if
necessary
.
Filters or oil line
blocked. Check
filters from tank
to boiler and clean
if necessary
.
Photocell
filmed over
.
Clean.
Photocell
faulty
.
Replace.
Faulty control box.
Replace if
necessary
.
Nozzle blocked.
Replace nozzle.
Faulty pump or
faulty pump drive.
Replace if necessary
.
Air in pump.
Bleed pump.
IGNITION F
AILURE
BURNER F
AILS
TO
ST
AR
T
PULSA
TION ON ST
AR
T
Control box fault.
Replace if necessary
.
Burner motor fails
to operate.
Check motor across
mains supply
.
Intermittent
lockout.
Bad electrical
connection.
Downdraught.
Intermittent flame
detection fault.
See flame detection
fault.
Pulsation
on start.
Extend flue above
eaves, or if possible
above roof apex or
adjacent obstructions.
Fit a downdraught
cowl if flue cannot
be extended.
Check control box
connections.
Electrode
settings
incorrect.
See installation
instructions.
Faulty ignition
transformer
.
Replace
if necessary
.
Open circuit
ignition.
Electrical connections
not properly
made in
control box.
Faulty control box.
Replace control box.
Electrodes
broken.
High tension
leads faulty
.
Boiler does not respond to a call for heat.
Boiler thermostat
faulty
. Check by
linking out high
limit and control
thermostats.
Programmer
open circuit.
Check by linking
8 and 9 on the
connector
.
Faulty control
box. Replace
if necessary
.
Flue draught
incorrect.
Check flue
draught.
Combustion
settings
incorrect.
Set up as in
installation
instructions.
Faulty nozzle.
Replace nozzle.
HIGH SMOKE NUMBER
Incorrect combustion
settings. Readjust as in
installation instructions.
Oil pressure incorrect.
Adjust to recommended
pressure settings.
Air intake blocked.
Check air intake is clear
.
Incorrect components
used on combustion
head. Check with installation
instructions.
OIL
SMELLS
Fumes on start-up.
Blocked flue.
Check flue with gauge.
Oil soaked hearth.
Odour in boiler room.
Faulty burner
operation.
Numerous lockouts.
Cure the lockout
condition.
Oil leaks pipe fittings.
Take apart and
remake if necessary
.
Leaks at flexible hose
connectors.
Ensure connections are secure.
FAUL
TY
BOILER OPERA
TION
W
orn motor bearings.
Replace motor
.
Noisy operation.
Fan out of balance.
Replace fan.
Pump noise.
Air in pump.
W
orn pump.
Replace.
Boiling.
Short cycling.
Faulty boiler thermostat.
Replace if necessary
.
Short circuit boiler thermostat.
Take out of circuit to check.
Thermostat bulb not fully
home in pocket.
Ensure bulb is
pushed fully home.
External controls not
operating correctly
.
Boiler thermostat
dif
ferential incorrect.
Should be 5
°
C
±
1.5
°
C.
Boiler rating incorrect.
If overrated heat load
satisfied very quickly
.
Faulty mechanical
shut of
f valve.
Clean or replace.
Faulty nozzle.
Replace nozzle.
16. Fault Finding
Summary of Contents for DANESMOOR FS12/18
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