68
COMMISSIONING AND MAINTENANCE
BURNER FAULTS/SOLUTIONS
Problem
Diagnostic signal
Probable cause
Remedy
The burner does not ignite when
heat is requested
OFF
No electrical power
Check voltage at L, N and in
power plug
Check the condition of the
fuses
Check that the safety
thermostat has not tripped
RED, GREEN flashing
The flame detector reads
extraneous light
Eliminate cause of light or
false flame signal
OFF
The burner controller
connectors are not properly
plugged in
Make sure that all connectors
are properly connected
Flashing GREEN
Short circuit connector P not
connected
Replace as necessary
The burner locks out before
or during pre-purging or
preheating
RED flashing
The flame detector is reading
extraneous light
Eliminate cause of light or
false flame signal
The burner performs pre-
purging and ignition correctly
but locks out after about 5
seconds
RED
Steady ON
Flame detector dirty
Clean the flame detector
The flame detector is faulty
Change as necessary
The flame detaches or fails
Check fuel oil pressure and
flow rate
Check the air flow
Change the nozzle
Check solenoid valve coil
The burner starts up only after
late ignition.
OFF
Ignition electrodes incorrectly
positioned
Adjust ignition electrodes as
instructed in this manual.
Air flow rate too high
Adjust air flow rate as
instructed in this manual.
Nozzle dirty or worn
Replace