23
Procedure
Status
Corrective Actions
9. Check cad cell sighting for
view of flame.
*Disconnect line voltage power
and open line switch.
*Unplug cad cell and clean cad
*cell face with a soft cloth.
Check *sighting for clear view
of flame. *Place cad cell back
in socket.
*Reconnect line voltage power
and close line switch.
*Start burner.
Burner locks out
Burner keeps running
Go to step 10.
System is okay.
10. Check cad cell.
*Disconnect line voltage power
and open line switch.
*Remove existing cad cell and
replace with new cad cell.
*Disconnect all wires from
thermostat terminals to be sure
there is no call for heat.
*Reconnect line voltage power
and close line switch.
*Expose new cad cell to bright
light, such as a flashlight.
Indicator light is on
Indicator light is off
Place control back on burner.
Go to step 6.
Go to step 11.
11. Check cad cell bracket
assembly.
*Disconnect line voltage power
and open line switch.
*Remove cad cell wires from
quick-connect connectors on
the R7184B and leave control
wires open.
*Apply power to device.
*Place jumper across cad cell
terminals after burner motor
turns on.
Indicator light is on
Indicator light is off
Replace cad cell bracket
assembly. Refer to
TRADELINE® Catalog for
bracket part numbers.
Replace R7184B
TROUBLE SHOOTING GUIDE
Summary of Contents for IHS 1500
Page 25: ...IHS 1500 Wiring Panel 24 ...
Page 26: ...25 REPLACEMENT PARTS ...
Page 27: ...26 18 19 20 21 REPLACEMENT PARTS ...