Hearth and Home Technologies Bravo - Manual (Page 47)

Hearth & Home Technologies, Inc. • Bravo, Aztec • InD • 703-900 Rev. N • 8/06 47
Intellifi re Ignition System - (continued)
Symptom Possible Cause Corrective Action
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.) b. Poor fl ame rectifi cation or contaminated
sensor rod. Verify that fl ame is engulfi ng sensor rod. If the pilot assem-
bly does not have a ground strap, consider installing one
to increase fl ame rectifi cation. Verify correct pilot orifi ce is
installed and inlet gas specifi cations. Flame carries recti-
fi cation current, not the gas. If fl ame lifts from pilot hood,
the circuit is broken. A wrong orifi ce or too high an inlet
pressure can cause pilot fl ame to lift. The sensor rod may
be contaminated. Clean sensor rod with emery cloth.
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.) c. Module is not grounded. Verify that module is securely grounded to metal chassis
of appliance. Verify that wire harness is fi rmly connected to
module.
d. Damaged pilot assembly or dirty sensor
rod. 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.
e. Faulty module. 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.
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 pres-
sure 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/Pilot
solenoid ohms readings. Verify battery voltage is at least 2.7 volts. Replace batter-
ies if voltage is below 2.7.