240005126 Rev A 10/27/2005
22
Condition: Burner starts then locks out on safety with indicator light flashing at 1 Hz rate (½
second on, ½ second off)
Procedure Status
Corrective
Action
1.
Check that the limit switches
are closed and contacts are
clean.
- - -
- - -
2.
Check for line voltage power at
the oil primary control. Voltage
should be 120 vac (nominal)
- - -
- - -
Indicator light is on.
Cad cell or controller is defective, sees external light, or
connections are shorted. Go to step 4.
3.
Check indicator light with
burner off, no call for heat (no
flame).
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.
4.
Replace cad cell with new cad cell and recheck.
5.
If indicator light does not turn off, remove cad cell lead wires
from R7184 and recheck.
6.
If indicator light turns off, replace cad cell bracket assembly.
7.
If indicator light does not turn off, replace controller.
5.
Jumper thermostat (T -T)
terminals on R7184
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 R7184
Indicator light stops flashing.
Go to Step 7.
6.
Reset oil primary control by
pushing in and releasing red
reset button.
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 R7184
Ignition is off
Spark igniter could be defective. Check for line voltage at igniter
terminals. If line voltage is present, replace R7484.
Ignition is on.
Go to Step 8.
7.
Listen for spark after burner
turns on (after 2 second delay).
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.
Indicator light is on until the control
locks out and starts flashing during
lockout.
Replace R7184
8.
Check indicator light after
flame is established, but
before oil primary control locks
out.
Indicator light stays off.
Go to step 9.
