Heatilator Direct Vent Gas Appliance CD4236ILR Owner's Manual page 60

B. Intellifi re Ignition System (continued)
Symptom
4. Pilot lights but continues
to spark, and main burner
will not ignite. (If the pilot
continues to spark after
the pilot fl ame has been lit,
fl ame rectifi cation has not
occurred.)
60
Possible Cause
A. A shorted or loose connection
in fl ame sensing rod.
B. Poor fl ame rectifi cation or
contaminated fl ame sensing
rod.
C. Module is not grounded.
D. Damaged pilot assembly or
contaminated fl ame sensing
rod.
E. Module.
Heatilator • Caliber CD Series • 4040-263 Rev N • 11/08
Corrective Action
Verify all connections to wiring diagram in manual. Verify
connections 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.
With fi xed glass assembly in place, verify that fl ame is engulfi ng
fl ame sensing rod on left side of pilot hood. Flame sensing rod
should glow shortly after ignition. Verify correct pilot orifi ce is
installed and gas inlet is set to pressure specifi cations.
Verify module is securely grounded to metal chassis of appliance.
Verify that wire harness is fi rmly connected to the module.
Verify that ceramic insulator around the fl ame sensing rod is not
cracked, damaged, or loose. Verify connection from fl ame sensing
rod to white sensor wire. Clean fl ame sensing rod with emery cloth
to remove any contaminants that may have accumulated on fl ame
sensing rod. Verify continuity with a multimeter with ohms set at
lowest range. Replace pilot if any damage is detected.
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 fi ne.