Quadra-Fire Expression 36 QV36A-FB - Manual (Page 46)

Quadra-Fire • Expression 36 (QV36A-FB) • 2062-900 Rev. S • 11/11 46
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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 service person in the diagnosis of a problem and the
corrective action to be taken. This troubleshooting guide can only be used by a qualifi ed service technician.
A. IntelliFire Ignition System
Symptom Possible Cause Corrective Action
1. The ignitor/module
makes noise, but no
spark. a. Incorrect wiring. Verify “S” wire (white) for sensor and “I” wire (orange) for ignitor
are connected to correct terminals on module and pilot assembly.
Reversed wires at the module may cause system to make sparking
noise, but spark may not be present at pilot hood.
b. Loose connections or electrical
shorts in the wiring. Verify no loose connections or electrical shorts in wiring from mod-
ule to pilot assembly. Rod closest to pilot hood should be ignitor.
Verify connections underneath pilot assembly 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.
c. Ignitor gap is too large. Verify gap of igniter to pilot hood. The gap should be approximately
.17 inch 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 fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
2. Pilot won’t light,
there is no noise or
spark. a. Transformer installed correctly. 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.
b. A shorted or loose connection in wir-
ing confi guration or wiring harness. Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight fi t. Verify pilot assembly wiring to module.
Remove and verify continuity of each wire in wiring harness.
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. 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 fi ne.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
3. Pilot lights but con-
tinues to spark, and
main burner will not ig-
nite. (If the pilot contin-
ues to spark after the
pilot fl ame has been lit,
fl ame rectifi cation has
not occurred.) a. A shorted or loose connection in
sensor rod. Verify all connections to wiring diagram in manual. Verify connec-
tions underneath pilot assembly are tight. Verify connections are
not grounding out to metal chassis, pilot burner, pilot enclosure or
screen if present, or any other metal object.
b. Poor fl ame rectifi cation or contami-
nated sensor rod. Verify that fl ame is engulfi ng sensor rod. If the pilot assembly does
not have a ground strap, consider installing one to increase fl ame
rectifi cation. Verify correct pilot orifi ce is installed and inlet gas
specifi cations. Flame carries rectifi cation current, not the gas. If
fl ame lifts from pilot hood, the circuit is broken. A wrong orifi ce or
too high an inlet pressure can cause pilot fl ame to lift. The sensor
rod may be contaminated. Clean sensor rod with emery cloth.