Crown Boiler AWI037 Installation Instructions Manual page 35

Intermittent Ignition System Troubleshooting Chart
START
(24 volts is present across 5 and 6 on S8600
module, but main burners do not light)
Spark
Y
across
ignitor/sensor
gap?
N
Can you
Y
hear
sparking?
N
*Faulty
S8600
module
*Break in
spark cable
insulation
*Break in pilot
* Low line pressure
porcelain
*Plugged, kinked or leaking
*Incorrect pilot
pilot tubing
spark gap
*Plugged pilot orifice
*Loose
connection in
*Gas line not purged of air
spark cable
*Defective pilot assembly
*Loose
ground
*Defective gas valve
connection
Y
Pilot
lights?
N
24 volts
N
across
terminals 2&3
at S8600?
*Defective
S8600 module
Y
24 volts
N
across PV &
MV/PV at gas
valve?
Y
*Defective EI
wiring
harness.
35
33
Caution: Read page 29 before
attempting to use this chart
Does
Y
spark stop
when pilot
lights?
N
terminals 1&2
on S8600?
between MV &
MV/PV on gas
*Loose connection in
ignition cable or
ground wire
*Pilot electrode
porcelain cracked
*Pilot flame not
covering gap
between electrode
and grounding
strap
*Low gas pressure
at gas valve inlet
*Defective S8600
module
Main
Y
burner END
lights?
N
24VAC
N
across
Y
*Defective
S8600
module
24 volts
Y
valve?
N
*Defective EI
harness
*Defective
gas valve