Monessen Hearth Artisan AVFL Series Owner's Manual page 24

IntelliFire Plus™ ODS Ignition System (Continued)
Pilot sparks, but will not
light.
Pilot lights but continues to
spark, and burner will not
ignite. (If the pilot contin-
ues to spark after the pilot
flame has been lit, flame
rectification has not oc-
curred.)
24
Gas supply.
Igniter gap is too large.
Module is not grounded.
Pilot valve solenoid
A short or loose connection in
flame sensing rod.
Poor flame rectification or con-
taminated flame sensing rod.
Module is not grounded.
Damaged pilot assembly or
contaminated flame sensing rod
Module
Monessen • AVFL Series Owner's Manual • 4099-900 Rev. C • 06/21
Verify that incoming gas line ball valve is "open". Verify
that inlet pressure reading is within acceptable limits.
Verify gap of igniter to right side of pilot hood. The gap
should be approximately .17 in. or 1/8 in. (3 mm).
Verify module is securely grounded to metal chassis of
appliance.
Verify that 1.5 to 1.8 VDC is supplied to pilot solenoid
from module. If below 1.5 volts, replace module. If 1.5
volts or greater, replace valve.
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.
Verify correct pilot orifice is installed and gas inlet is set
to pressure specifications. Check pilot for soot. Clean if
necessary.
Verify module is securely grounded to metal chassis of
appliance. Verify that wire harness is firmly connected to
the module.
Verify that ceramic insulator around the flame sensing
rod is not cracked, damaged, or loose. Verify connection
from flame sensing rod to white sensor wire. Polish flame
sensing rod with fine steel wool to remove any contami-
nants that may have accumulated on flame sensing rod.
Verify continuity with a multimeter with ohms set at low-
est range. Replace pilot if any damage is detected.
Turn wall control to OFF position. Remove igniter wire "I"
from module. Turn wall control to ON position. If there is
no spark at "I" terminal module must be replaced. If there
is a spark at "I" terminal, module is fine.