Royal Appliance Air Furnace - Manual (Page 33)

29733 R2 06/01/2003
33
· Table C-3: R7184 Troubleshooting continued from previous page
Procedure Status Corrective Action
Burner starts.
Trouble is in thermostat circuit. Check thermostat
wiring connections.
If connections are clean and tight, check
thermostat wires for continuity.
· Disconnect line voltage power and open line
switch.
· Check all wiring connections.
· Tighten any loose connections and recheck.
· If burner still doesn't start, replace R7184
5. Jumper thermostat (T -T)
terminals on R7184
IMPORTANT
First remove one thermostat
lead wire.
Burner does not start.
If burner still doesn't start, check the oil burner
motor. It may be seized or burned out.
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.
Indicator light turns off.
Eliminate external light source or permanently
shield cad cell.
4. Shield cad cell from
external light.
Indicator light stays on.
· Replace cad cell with new cad cell and
recheck.
· If indicator light does not turn off, remove cad
cell leadwires from R7184 and recheck.
· If indicator light turns off, replace cad cell
bracket assembly.
· If indicator light does not turn off, replace
controller.
Continued on next page