Section 5: Troubleshooting - Heat & Glo PIER-HVB-CE Installation Instructions Manual

5
Troubleshooting
With proper installation, operation, and maintenance the gas fi replace will provide years of trouble-free service. If you do
experience a problem, this trouble shooting guide will assist a qualifi ed service person in the diagnosis of a problem and the
corrective action to be taken. This troubleshooting guide can only be used by a qualifi ed service technician.
Symptom
1. After repeated a. Defective ignitor
triggering of
the red or black
b. Defective pilot or
piezo button, the
misaligned electrode
spark ignitor will
(spark at electrode)
not light the pilot.
c. No gas or low gas
pressure
d. No LP in the tank
2. The pilot will a. Defective thermocouple
not stay lit
after carefully
following
the lighting
instructions.
b. Defective valve
3. The pilot is a. ON/OFF switch or wires
burning, there is defective
no gas burner,
the valve knob
is in the ON
position, and the
b. Thermopile may not be
ON/OFF switch
generating suffi cient
is in the ON
millivoltage
position.
c. Defective valve
d. Plugged burner orifi ce
e. Wall switch or wires are
defective
Possible Cause
Check the spark at the electrode and pilot. If no spark and electrode wire is
properly connected, replace the ignitor.
Using a match, light the pilot. If the pilot lights, turn off the pilot and trigger the
red or black piezo button again. If the pilot lights, an improper gas/air mixture
caused the bad lighting and a longer purge period is recommended. If the pilot
will not light, ensure that the gap at the electrode and pilot is 0.3 cm to have a
strong spark. If the gap is OK, replace the pilot.
Check the remote shut-off valves from the fi replace. Usually, there is a valve
near the gas main. There can be more than one (1) valve between the fi replace
and the main.
Check the LP (propane) tank. You may be out of fuel.
Check that the pilot fl ame impinges on the thermocouple. Clean and/or adjust
the pilot for maximum fl ame impingement.
Ensure that the thermocouple connection at the gas valve is fully inserted and
tight (hand tighten plus 1/4 turn).
Disconnect the thermocouple from the valve, place one millivolt meter lead wire
on the tip of the thermocouple and the other meter lead wire on the thermocouple
copper lead. Start the pilot and hold the valve knob in. If the millivolt reading is
less than 15mV, replace the thermocouple.
If thermocouple is producing more than 15 millivolts, replace faulty valve.
Check the ON/OFF switch and wires for proper connections. Place the jumper
wires across the terminals at the switch. If the burner comes on, replace the
defective switch. If the switch is OK, place the jumper wires across the switch
wires at the gas valve. If the burner comes on, the wires are faulty or connections
are bad.
If the pilot fl ame is not close enough physically to the thermopile, adjust the
pilot fl ame.
Be sure the wire connections from the thermopile at the gas valve terminals are
tight and that the thermopile is fully inserted into the pilot bracket.
Check the thermopile with a millivolt meter. Take the reading at TH-TP&TP
terminals of the gas valve. The meter should read 325 millivolts minimum, while
holding the valve knob depressed in the pilot position, with the pilot lit, and the
ON/OFF switch in the OFF position. Replace the faulty thermopile if the reading
is below the specifi ed minimum.
With the pilot in the ON position, disconnect the thermopile leads from the valve.
Take a reading at the thermopile leads. The reading should be 325 millivolts
minimum. Replace the thermopile if the reading is below the minimum.
Turn the valve knob to the ON position. Place the ON/OFF switch in the ON
position. Check the millivolt meter at the thermopile terminals. The millivolt meter
should read greater than 125mV If the reading is acceptable, and if the burner
does not come on, replace the gas valve.
Check the burner orifi ce for stoppage. Remove stoppage.
Follow the corrective action in Symptom and Possible Cause 1. a. above. Check
the switch and wiring. Replace where defective.
Heat & Glo • PIER/ST/L&RCOR-HVB-CE • 2068-900 Rev. K • 6/09
Corrective Action
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