Troubleshooting; Intellifi Re Ignition System - Heatilator BGST4336I Owner's Manual

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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 qualifi ed technician in the diagnosis of a problem and the
corrective action to be taken. This troubleshooting guide can only be used by a qualifi ed technician. Contact your dealer to
arrange a service call by a qualifi ed technician.
A. Intellifi re Ignition System
Symptom
1. Pilot won't light. a. Incorrect wiring.
The ignitor/module
makes noise, but no
b. Loose connections or electrical
spark.
c. Ignitor gap is too large.
d. Faulty module.
2. Pilot won't light, a. No power or transformer installed
there is no noise or
spark.
b. A shorted or loose connection in wir-
c. Improper wall switch wiring.
d. Module not grounded.
e. Faulty module.
3. Pilot sparks, but a. Correct gas supply.
Pilot will not light.
b. Ignitor gap is incorrect.
c. Module is not grounded.
d. Module voltage output / Valve/Pilot
38
Possible Cause
shorts in the wiring.
incorrectly.
ing confi guration or wiring harness.
solenoid ohms readings.
Heatilator • GBST4336I • 2135-900 Rev. L • 12/15
Corrective Action
Verify "S" wire (white) for sensor and "I" wire (orange) for ignitor
are connected to correct terminals on module and pilot assembly.
Verify no loose connections or electrical shorts in wiring from
module to pilot assembly. Verify connections underneath pilot as-
sembly are tight; also verify connections are not grounding out to
metal chassis, pilot burner, pilot enclosure, mesh screen if present,
or any other metal object.
Verify gap of igniter to right side of pilot hood. The gap should be
approximately .095 in. (2.41 mm) to .135 in. (3.43 mm).
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
module must be replaced. If there is a spark at "I" terminal, module
is fi ne. Inspect pilot assembly for shorted sparker wire or cracked
insulator around electrode. Replace pilot if necessary.
Verify that transformer is installed and plugged into module. Check
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.
Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight fi t. Verify pilot assembly wiring to module. Re-
move and verify continuity of each wire in wiring harness. Replace
any damaged components.
Verify that 110-120 VAC power is "ON" to junction box.
Verify black ground wire from module wire harness is grounded to
metal chassis of appliance.
Turn ON/OFF rocker switch or wall switch to OFF position. Re-
move 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 fi ne. Inspect pilot assembly for shorted sparker wire or cracked
insulator around electrode.
Verify that incoming gas line ball valve is "open". Verify that inlet
pressure reading is within acceptable limits, inlet pressure must
not exceed 14 in. W.C.
Verify gap of igniter to right side of pilot hood. The gap should be
approximately .095 in. (2.41 mm) to .135 in. (3.43 mm).
Verify module is securely grounded to metal chassis of appliance.
Verify battery voltage is at least 2.7 volts. Replace batteries if volt-
age is below 2.7.
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