Empire Comfort Systems DV-55IP - Manual (Page 18)

Page 18 12432-9-0107
START
Check line voltage power, low voltage transformer, limit control,
thermostat and wiring.
Yes
Note: Before troubleshooting, familiarize yourself with the startup andcheckout procedure.
Turn gas supply off
Turn thermostat to
call for heat.
Power to module.
(24 VAC nominal)
Yes
S8600H TROUBLESHOOTING GUIDE
Spark across
Igniter/sensor gap.
Yes
Turn gas supply on.
Pilot burner lights?
System runs until
call for heat ends?
Yes
Troubleshooting ends
Call for heat ends.
System shuts
Yes
Spark stops when
pilot is lit?
Main burner lights?
Yes
Yes
* Check that all manual gas valves are open. Supply tubing and
pressures are good, and pilot burner orifice is not blocked.
* Check electrical connections between module and pilot operator on
gas control.
* Check for 24V AC 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.
* 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.
* Remove MV lead at module: If valve closes, recheck thermostat
and wiring. If not, place gas control.
* Note: If S8600H goes into lockout, reset system.
* 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 24V AC acro ss MV-MV/PV terminals. If no voltage,
replace module.
* Check electrical connections between module and gas control. If
okay, replace gas control.
Repeat procedure until trouble free operation is obtained.
No
No
No
No
No
No
No
Pull ignition lead and check
spark at ignition stud.
Spark okay?
Replace module.
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.
No