Hearth and Home Technologies TOPAZ-D-CWL, 839-1340, 839-1320, 844-4120, 839-1290 Troubleshooting

10 Troubleshooting

With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you do experience a problem, this troubleshooting guide will assist a qualified service person in the diagnosis of a problem and the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.

Symptom	Possible Cause	Corrective Action
1. After repeated trig-	a. Defective ignitor.	Check the spark at the electrode and pilot. If no spark and electrode
gering of the piezo		wire is properly connected, replace the ignitor.
button, the spark ignitor
	b. Defective pilot or	Using a match, light the pilot. If the pilot lights, turn off the pilot and
will not light the pilot.	misaligned electrode	trigger the piezo button again. If the pilot lights, an improper gas/air
	(spark at electrode).	mixture caused the bad lighting and a longer purge period is recom-
		mended. If the pilot will not light, ensure the gap at the electrode and
		pilot is one-eighth (1/8) inch to have a strong spark. If the gas is OK,
		replace the pilot.
	c. No gas or low gas	Check the remote shut-off valve from the appliance. Usually, there is
	pressure.	a valve near the gas main. There can be more that one (1) valve from
		the appliance and the main.
	d. No LP in tank.	Check the LP (propane) tank. You may be out of fuel.
2. The pilot will not stay	a. Defective thermo-	Check that the pilot flame impinges on the thermocouple. Clean and /or
lit after carefully follow-	couple.	adjust the pilot for maximum flame impingement.
ing the lighting instruc-
tions.		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 lead
		wire on the tip of the thermocouple and the other meter 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.
	b. Defective valve.	If the thermocouple is producing more than 15 millivolts, replace faulty
		valve.
3. The pilot is burning,	a. ON/OFF switch or	Check the ON/OFF switch and wires for proper connections. Place the
there is no gas to the	wires defective.	jumper wires across the terminals at the switch. If the burner comes on,
burner, the valve knob is		replace the defective switch. If the switch is OK, place the jumper wires
in the ON position, and		across the switch wires at the gas valve. IF the burner comes on, the
the ON/OFF switch is in		wires are faulty or connections are bad.
the ON position.
	b. Thermopile may	If the pilot flame is not close enough physically to the thermopile, adjust
	not be generating	the pilot flame.
	sufficient millivoltage.	Be sure the wire connections from the thermopile at the gas valve ter-
		minals 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 specified 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.

Page 40 Quadra-Fire · Topaz · 7009-113G September 1, 2008