56
W415-1540 / 08.04.15
EN
SYMPTOM
PROBLEM
TEST SOLUTION
Carbon is being
deposited on
glass, logs,
rocks, media
or combustion
chamber surfaces.
Air shutter has become
blocked.
-
Ensure air shutter opening is free of lint or other
obstructions.
Flame is impinging on the
glass, logs, rocks, media
or combustion chamber.
-
Check that the glass, logs, rocks or media are
correctly positioned.
-
Open air shutter to increase the primary air.
-
Check the input rate: check the manifold pressure
and ori
fi
ce size as speci
fi
ed by the rating plate
values.
-
Check that the door gasketing is not broken or
missing and that the seal is tight.
-
Check that both vent liners are free of holes and
well sealed at all joints.
-
Check that minimum rise per foot has been adhered
to for any horizontal venting.
Continues to
spark and pilot
lights, but main
burner will not
light.
Short or loose
connection in sensor rod.
-
Verify all connections. Verify the connections
from the pilot assembly are tight; also verify these
connections are not grounding out to any metal.
Poor
fl
ame recti
fi
cation
or contaminated
sensor rod.
-
Verify the
fl
ame is engul
fi
ng the sensor rod. This
will increase the
fl
ame recti
fi
cation. Verify correct
pilot ori
fi
ce is installed and inlet gas speci
fi
cations
to manual. (Remember, the
fl
ame carries the
recti
fi
cation current, not the gas. If the
fl
ame lifts
from pilot hood, the circuit is broken. A wrong ori
fi
ce
or to high of an inlet pressure can cause the pilot
fl
ame to lift.) The sensor rod may need cleaning.
Poor grounding between
pilot assembly and
gas valve.
-
Verify that the wire harness is
fi
rmly connected to
module. Verify that the ceramic insulator around the
sensor rod is not cracked, damaged, or loose. Verify
the connection from the sensor rod to the sensor wire.
Damaged pilot or dirty
sensor rod.
-
Clean sensor rod with a
fi
ne steel wool to remove
any contamination that may have accumulated on
the sensor rod. Verify continuity with multimeter with
ohms set at the lowest range.
Pilot lights
Stops sparking
/ pilot remains lit
but burner will
not turn on.
Wiring / Connection.
-
Inspect all wires, ensure good tight connections.
Verify that all wiring is installed exactly as speci
fi
ed.
Wiring harness.
-
Inspect the wiring harness, and verify the harness
is tightly connected to the module. Verify that all
wires are connected in the right order. See “WIRING
DIAGRAM” section.
Exhaust fumes
smelled in room,
headaches.
Appliance is spilling.
-
Check all seals.
-
Check if exhaust is re-entering through an open
door or window.
42.7_2
Summary of Contents for CX70NT
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