Empire Comfort Systems DVP42FP3(0,1,2,3)(N,P)-1 Installation Instructions And Owner's Manual page 40

INTERMITTENT PILOT TROUBLESHOOTING (continued)
START
Turn gas supply off
Turn thermostat to
call for heat.
Power to module.
(24 VAC nominal)
Yes
Spark across
ignitor/sensor gap.
Yes
Turn gas supply on.
Pilot burner lights?
Yes
Spark stops when
pilot is lit?
Yes
Main burner lights?
Yes
System runs until
call for heat ends?
Ye s
Call for heat ends.
System shuts off?
Troubleshooting ends.
Page 40
S8600H TROUBLESHOOTING GUIDE
Note: Before troubleshooting, familiarize yourself with the startup
and checkout procedure.
Check line voltage power, low voltage transformer limit control,
No
thermostat and wiring.
Pull ignition lead and
check spark at ignition
No
stud.
Spark okay?
Yes
• Check ignition cable, ground wiring, ceramic insulator,
and gap, and correct.
• Check boot of the ignition cable for signs of melting or
buckling. Take protective action to shield cable and boot
from excessive temperatures.
• Check that all manual gas valves are open. Supply tubing
And pressures are good, and pilot burner orifice is not blocked.
No
• Check electrical connections between module and pilot
Operator on gas control.
Check for 24 VAC across PV - MV/PV terminals on module.
If voltage is okay, replace gas control. If not, replace module.
Note: If S8600H goes into lockout, reset system.
No
Check continuity of ignition cable and ground wire.
Check that pilot flame covers electrode.
Adjust pilot flame current. Minimum signal should read 1.0
microamp.
If problem persists, replace module.
Check for 24 VAC across MV-MV/PV terminals. If no voltage,
No replace module.
Check electrical connections between module and gas control.
If okay, replace gas control.
Note: If S8600H goes into lockout, reset system.
No
Check continuity of ignition cable and ground wire. Note: If
ground is poor or erratic, shutdowns may occur occasionally
even though operation is normal at the time of checkout.
If checks are okay, replace module.
Check for proper thermostat operation.
No
Remove MV lead at module: If valve closes, recheck
thermostat and wiring. If not, replace gas control.
Repeat procedure until troublefree operation is obtained.
No Replace module.
17375-10-0706