14 Troubleshooting

With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you do experience a problem, this troubleshooting guide will assist a qualified service person in the diagnosis of a problem and the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.

A. Intellifire Ignition System

Symptom

Possible Causes

Corrective Actions

1. The

a. Incorrect wiring.

Verify "S" wire (white) for sensor and "I" wire (orange) for ignitor are

ignitor/module

 

connected to correct terminals on module and pilot assembly. Reversed wires

makes noise, but no

 

at the module may cause system to make sparking noise, but spark may not

spark.

 

be present at pilot hood.

 

b. Loose

Verify no loose connections or electrical shorts in wiring from module to pilot

 

connections or

assembly. Rod closest to pilot hood should be ignitor. Verify connections

 

electrical shorts in

underneath pilot assembly are tight; also verify connections are not grounding

 

the wiring.

out to metal chassis, pilot burner, pilot enclosure, mesh screen if present, or

 

 

any other metal object.

 

c. Ignitor gap is too

Verify gap of igniter to pilot hood. The gap should be approximately .17 inch

 

large.

or 1/8 inch.

 

d. Faulty module.

Turn ON/OFF rocker switch or wall switch to OFF position. Remove ignitor

 

 

wire "I" from module. Place ON/OFF Rocker switch or wall switch in ON

 

 

position. Hold ground wire about 3/16 inch away from "I" terminal on module.

 

 

If there is no spark at "I" terminal module must be replaced. If there is a spark

 

 

at "I" terminal, module is fine. Inspect pilot assembly for shorted sparker wire

 

 

or cracked insulator around electrode.

2. Pilot won't light,

a. Transformer

Verify that transformer is installed and plugged into module. Check voltage of

there is no noise or

installed correctly.

transformer under load at spade connection on module with ON/OFF switch

spark.

 

in ON position. Acceptable readings of a good transformer are between 3.2

 

 

and 2.8 volts AC.

 

b. A shorted or

Remove and reinstall the wiring harness that plugs into module. Verify there is

 

loose connection in

a tight fit. Verify pilot assembly wiring to module. Remove and verify continuity

 

wiring configuration

of each wire in wiring harness.

 

or wiring harness.

 

 

c. Improper wall

Verify that 110/VAC power is "ON" to junction box.

 

switch wiring.

 

 

d. Module not

Verify black ground wire from module wire harness is grounded to metal

 

grounded.

chassis of appliance.

 

e. Faulty module.

Turn ON/OFF rocker switch or wall switch to OFF position. Remove ignitor

 

 

wire "I" from module. Place ON/OFF Rocker switch or wall switch in ON

 

 

position. Hold ground wire about 3/16 inch away from "I" terminal on module.

 

 

If there is no spark at "I" terminal module must be replaced. If there is a spark

 

 

at "I" terminal, module is fine. Inspect pilot assembly for shorted sparker wire

 

 

or cracked insulator around electrode.

3. Pilot lights but

a. A shorted or

Verify all connections to wiring diagram in manual. Verify connections

continues to spark,

loose connection in

underneath pilot assembly are tight. Verify connections are not grounding out

and main burner will

sensor rod.

to metal chassis, pilot burner, pilot enclosure or screen if present, or any other

not ignite. (If the

 

metal object.

pilot continues to

b. Poor flame

Verify that flame is engulfing sensor rod. If the pilot assembly does not have a

spark after the pilot

rectification or

ground strap, consider installing one to increase flame rectification. Verify

flame has been lit,

contaminated

correct pilot orifice is installed and inlet gas specifications. Flame carries

flame rectification

sensor rod.

rectification current, not the gas. If flame lifts from pilot hood, the circuit is

has not occurred.)

 

broken. A wrong orifice or too high an inlet pressure can cause pilot flame to

 

 

lift. The sensor rod may be contaminated. Clean sensor rod with emery cloth.

 

c. Module is not

Verify that module is securely grounded to metal chassis of appliance. Verify

 

grounded.

that wire harness is firmly connected to module.

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Heat & Glo • Crescent II • 2083-902 Rev. G • 9/05

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Hearth and Home Technologies Crescent II owner manual Troubleshooting, Intellifire Ignition System
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