Heat & Glo SL-550TR-E Owner's Manual page 62

Intellifi re Ignition System - (continued)
Symptom
3. (Continued) Pilot lights
but continues to spark,
and main burner will not
ignite. (If the pilot contin-
ues to spark after the pilot
fl ame has been lit, fl ame
rectifi cation has not oc-
curred.)
4. Pilot sparks, but Pilot
will not light.
62
Possible Cause
c. Module is not grounded.
d. Damaged pilot assembly or dirty sensor
rod.
e. Faulty module.
a. Correct gas supply.
b. Ignitor gap is too large.
c. Module is not grounded.
d. Module voltage output / Valve/Pilot
solenoid ohms readings.
Heat & Glo • SL-550 / 750 / 950TR-E • 2118-900 Rev. D • 6/07
Corrective Action
Verify that module is securely grounded to metal chassis
of appliance. Verify that wire harness is fi rmly connected to
module.
Verify that ceramic insulator around the sensor rod is not
cracked, damaged, or loose. Verify connection from sen-
sor rod to white sensor wire. Clean sensor rod with emery
cloth to remove any contaminants that may have accumu-
lated on sensor rod. Verify continuity with a multimeter with
ohms set at lowest range.
Turn ON/OFF rocker switch or wall switch to OFF posi-
tion. 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.
Verify that incoming gas line ball valve is "open". Verify that
inlet pressure reading is within acceptable limits, inlet pres-
sure must not exceed 14 in. W.C.
Verify that spark gap from ignitor to pilot hood is .17 in. or
1/8 in.
Verify module is securely grounded to metal chassis of
appliance.
Verify battery voltage is at least 2.7 volts. Replace batter-
ies if voltage is below 2.7.