Hearth & Home Technologies SL-750TV-D User Manual

Heat & Glo  •  SL-550 / 750 / 950TV-D  •  2053-985 Rev. H  •  9/06

38

Intellifi re Ignition System - (continued)

3. ...continued       

d.  Damaged pilot 
assembly or dirty 
sensor rod.

Verify that ceramic insulator around the sensor rod is not cracked, dam-
aged, or loose. Verify connection from sensor rod to white sensor wire. 
Clean sensor rod with emery cloth to remove any contaminants that may 
have accumulated on sensor rod. Verify continuity with a multimeter with 
ohms set at lowest range. 

e.  Faulty module.

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 po-
sition. 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.

4.  Pilot sparks, but 
Pilot will not light.

a. Correct gas supply. Verify that incoming gas line ball valve is “open”. Verify that inlet pressure 

reading is within acceptable limits, inlet pressure must not exceed 14 in. 
W.C. 

b.  Ignitor gap is too 
large.

Verify that spark gap from ignitor to pilot hood is .17 in. or 1/8 in.

c.  Module is not 
grounded.

Verify module is securely grounded to metal chassis of appliance.

d.  Module voltage 
output / Valve/Pi-
lot solenoid ohms 
readings.

Verify battery voltage is at least 2.7 volts. Replace batteries if voltage is 
below 2.7.