Desa CB36N Installation And Owner's Operation Manual page 29

OBSERVED PROBLEM
Electronic Ignition Models
Only.Ignitor.will.not.spark.or.
pilot.will.not.light
Electronic Ignition Models
Only Pilot.will.not.stay.lit
Electronic Ignition Models
Only Frequent.outage.of.main.
burner.and.pilot.after.complete.
ignition.sequence
117437-01D
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. No gas supply, or shutoff
valve.is.OFF
..Air.in.gas.line
3..Construction. debris. clog-
ging pilot orifice
4..Low.gas.pressure
5..Kinked.pilot.line
6..Control.valve.is.not.open-
ing
7..No. power. to. unit. or. the.
ignition.module
1..Loose.wiring.on.ignitor.wire.
to. ignition. module. and/
or. poor. ground. to. ignition.
module
..Pilot. flame. too. low. to.
sense
1. Pilot flame may be too low
to. sense. flame. causing.
ignition. module. to. shut.
down
..Improper. or. restricted.
venting
www.desatech.com
REMEDY
1..Check.to.see.if.you.have.gas.
supply.and.that.equipment.
shutoff.valve.is.opened
..Repeat. lighting. procedure.
several.times.to.purge.all.air.
out.of.lines..If.after.repeated.
attempts. appliance. does.
not light, call for qualified
service.and.repair
3. Remove debris and dirt, and
inspect.and.clean.any.other.
possible.obstructions
4..Contact. your. gas. supplier.
to.check.pressure
5. Have a qualified technician
replace.pilot.line
6..Replace.control.valve.(Re-
fer.to.Replacement Parts,
page.31)
7..Check. that. main. power. is.
on. and. that. wire. connec-
tions. are. made. correctly.
to. the. ignition. model. (see.
Wiring Diagrams, page 13).
Check. for. 4. VAC. at. the.
secondary.side.of.the.trans-
former. If 24 VAC is present,
and. the. module. does. not.
operate, have the module
replaced. otherwise. have.
the.transformer.replaced
1..Check. wiring. connection..
Refer.to.wiring.diagram.(see.
Wiring Diagrams, page 13)
and/or.check.ground.wire.to.
ignition.module
..Clean and adjust pilot burner
and. check. gas. supply. and.
inlet. pressure. to. unit.. Note:.
Have a qualified technician
replace. pilot. assembly. if.
broken.or.corroded
1. Clean and adjust pilot flame
for maximum flame across
sensor.rod
..Locate.and.correct.all.vent.
conditions.(see.Checking for
Proper Venting, page 10)
9