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Condition:
Burner starts then locks out on safety with indicator light flashing at 1 Hz rate
('2
second on, % second off)
Procedure
Status
Corrective Action
Check that the limit switches are
closed and contacts are clean.
Check for line voltage power at the
oil primary control. Voltage should
be 120 Vac (nominal)
1.
Check indicator light with
burner off, no call for heat (no
flame).
Indicator light is on.
Cad cell or controller is defective, sees external light, or
connections are shorted. Go to step 4.
Indicator light is off.
Go to step 5.
4.
Shield cad cell from external
light.
Indicator light turns off.
Eliminate external light source or permanently shield cad cell.
Indicator light stays on.
Replace cad cell with new cad cell and recheck.
5.
If indicator light does not turn off, remove cad ceil lead wires
from the oil primary control and recheck.
If indicator light turns off, replace cad cell bracket assembly.
If indicator light does not turn off, replace controller.
5.
Jumper thermostat (T -T)
terminals on the oil primary
control
IMPORTANT
First remove one thermostat lead
wire.
Burner starts.
Trouble in thermostat or limit circuit. Check thermostat or limit
wiring connections.
Burner does not start.
Disconnect the line voltage power and open line switch.
Check all wiring connections.
Tighten any loose connections and recheck.
If burner does not start, replace the oil primary control
6.
Reset oil primary control by
pushing in and releasing red
reset button.
Indicator light stops flashing.
Go to Step 7.
Indicator light continues to flash at 1
Hz rate.
Verify that the control is not in restricted mode. (See notes at end
of this table.). If not in restricted mode, replace the oil primary
control
7.
Listen for spark after burner
turns on (after 2 second delay).
Spark igniter could be defective. Check for line voltage at igniter
Ignition is off
terminals. If line voltage is present, replace the oil primary
control.
Ignition is on.
Go to Step 8.
Ignition is on but no oil is being
sprayed into the combustion
chamber.
Wait for "Valve ON" delay to complete. Check oil supply, and oil
line valve. Check for filter blockage or seized oil pump.
8.
Check indicator light after
flame is established, but
before oil primary control locks
out.
Indicator light is on until the control
locks out and starts flashing during
lockout.
Replace the oil primary control
Indicator light stays off.
Go to step 9.
23
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