Crown Bermuda Installation Manual

38
38
Spark
across
ignitor/sensor
gap?
Y
Can you
hear
sparking?
* Defective
ignition
module
* Break in
spark cable
insulation
* Break in pilot
porcelain
* Incorrect
pilot spark gap
* Loose
connection in
spark cable
* Loose
ground
connection
N
Pilot
lights?
Y
NN
* Defective
ignition
module
24 volts
across
PV &
MV/PV at gas
valve?
* Defective EI
wiring
harness.
N
* 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 ignition
module
Main
burner
lights?
N
Y
24VAC
across
terminals
MV
& MV/PV
on
module?
Y
N
N
* Defective
ignition
module
24 volts
between
MV &
MV/PV on gas
valve?
* Defective
gas valve
* Defective EI
harness
END
START
(24 volts is present across
24V and 24V (GND) on
ignition module but main burners do not light)
N
Y
Y
N
Y
Y
Y
* Low line pressure
* Plugged, kinked or leaking
pilot tubing
* Plugged pilot orifice
* Gas line not purged of air
* Defective pilot assembly
* Defective gas valve
Does
spark stop
when pilot
lights?
24 volts
across
terminals
PV
& MV/PV
at
module?
Ignition System Troubleshooting Chart
Caution: Read page 33 before
attempting to use this chart