Quadra-Fire Expression 36 Owner's Manual

Also see for Expression 36: Owner's manual

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Quadra-Fire Expression 36 Owner's Manual Manual pdf 43 page image

43Quadra-Fire • Expression 36 (QV36A-FB) • 2062-900 Rev. Q • 2/101414 TroubleshootingWith proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you doexperience a problem, this troubleshooting guide will assist a qualified service person in the diagnosis of a problem and thecorrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.A. IntelliFire Ignition SystemSymptom Possible Cause Corrective Action1. The ignitor/modulemakes noise, but nospark.a. Incorrect wiring. Verify “S” wire (white) for sensor and “I” wire (orange) for ignitorare connected to correct terminals on module and pilot assembly.Reversed wires at the module may cause system to make sparkingnoise, but spark may not be present at pilot hood.b. Loose connections or electricalshorts 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 verifyconnections 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. Removeignitor wire “I” from module. Place ON/OFF Rocker switch or wallswitch in ON position. Hold ground wire about 3/16 inch away from“I” terminal on module. If there is no spark at “I” terminal modulemust be replaced. If there is a spark at “I” terminal, module is fine.Inspect pilot assembly for shorted sparker wire or cracked insulatoraround electrode.2. Pilot won’t light,there is no noise orspark.a. Transformer installed correctly. Verify that transformer is installed and plugged into module. Checkvoltage of transformer under load at spade connection on modulewith ON/OFF switch in ON position. Acceptable readings of a goodtransformer are between 3.2 and 2.8 volts AC.b. A shorted or loose connection in wir-ing configuration or wiring harness.Remove and reinstall the wiring harness that plugs into module.Verify there is a tight fit. 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 tometal chassis of appliance.e. Faulty module. Turn ON/OFF rocker switch or wall switch to OFF position. Removeignitor wire “I” from module. Place ON/OFF Rocker switch or wallswitch in ON position. Hold ground wire about 3/16 inch away from“I” terminal on module. If there is no spark at “I” terminal modulemust be replaced. If there is a spark at “I” terminal, module is fine.Inspect pilot assembly for shorted sparker wire or cracked insulatoraround electrode.3. Pilot lights but con-tinues to spark, andmain burner will not ig-nite. (If the pilot contin-ues to spark after thepilot flame has been lit,flame rectification hasnot occurred.)a. A shorted or loose connection insensor rod.Verify all connections to wiring diagram in manual. Verify connec-tions underneath pilot assembly are tight. Verify connections arenot grounding out to metal chassis, pilot burner, pilot enclosure orscreen if present, or any other metal object.b. Poor flame rectification or contami-nated sensor rod.Verify that flame is engulfing sensor rod. If the pilot assembly doesnot have a ground strap, consider installing one to increase flamerectification. Verify correct pilot orifice is installed and inlet gasspecifications. Flame carries rectification current, not the gas. Ifflame lifts from pilot hood, the circuit is broken. A wrong orifice ortoo high an inlet pressure can cause pilot flame to lift. The sensorrod may be contaminated. Clean sensor rod with emery cloth.