15 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 technician 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. Con- tact your dealer to arrange a service call by a qualified service technician.

A. Intellifire Ignition System

Symptom

Possible Cause

Corrective Action

 

 

 

1. Pilot won’t light. The ig-

A. Incorrect wiring.

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

nitor/module makes noise,

 

connected to correct terminals on module and pilot assembly.

but no spark.

 

 

 

B. Loose connections or electrical

Verify no loose connections or electrical shorts in wiring from module

 

shorts in the wiring.

to pilot assembly. Verify connections underneath pilot assembly are

 

 

tight; also verify connections are not grounding out to metal chas-

 

 

sis, pilot burner, pilot enclosure, mesh screen if present, or any other

 

 

metal object.

 

 

 

 

C. Ignitor gap is too large.

Verify gap of igniter to right side of pilot hood. The gap should be ap-

 

 

proximately .17 inch or 1/8 in. (3 mm).

 

D. Module.

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

 

 

ignitor wire “I” from module. Place a grounded wire about 3/16 in. (5

 

 

mm) away from “I” terminal on module. Place ON/OFF rocker switch

 

 

or wall switch in ON position. If there is no spark at “I” terminal mod-

 

 

ule 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. Replace pilot if necessary.

 

 

 

2. Pilot won’t light, there is no

A. No power or transformer in-

Verify that transformer is installed and plugged into module. Check

noise or spark.

stalled incorrectly.

voltage of transformer under load at spade connection on module

 

 

with ON/OFF switch in ON position. Acceptable readings of a good

 

 

transformer are between 3.2 and 2.8 volts AC.

 

 

 

 

B. A shorted or loose connection

Remove and reinstall the wiring harness that plugs into module. Ver-

 

in wiring configuration or wiring

ify there is a tight fit. Verify pilot assembly wiring to module. Remove

 

harness.

and verify continuity of each wire in wiring harness. Replace any

 

 

damaged components.

 

 

 

 

C. Improper wall switch wiring.

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

 

 

 

 

D. Module not grounded.

Verify black ground wire from module wire harness is grounded to

 

 

metal chassis of appliance.

 

E. 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. 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 sparks, but Pilot will

A. Gas supply.

Verify that incoming gas line ball valve is “open”. Verify that inlet

not light.

 

pressure reading is within acceptable limits, inlet pressure must not

 

 

exceed 14 in. W.C.

 

B. Ignitor gap is incorrect.

Verify that spark gap from ignitor to pilot hood is .17 in. or 1/8 in (3

 

 

mm).

 

C. Module is not grounded.

Verify module is securely grounded to metal chassis of appliance.

 

 

 

 

D. Module voltage output / Valve/

Verify battery voltage is at least 2.7 volts. Replace batteries if voltage

 

Pilot solenoid ohms readings.

is below 2.7.

 

 

 

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Heatilator • Caliber Mesh BV Series • 4040-848 Rev G • 10/08

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Hearth and Home Technologies CB4842MIR, CB4236MIR owner manual Troubleshooting, Intellifire Ignition System