Jackson Tempstar GP Troubleshooting Section, Use Extreme Caution When Testing The Machine, Action

TROUBLESHOOTING SECTION

WARNING: Inspection, testing and repair of electrical equipment should only be performed by a qualified service techni- cian. Many of the tests require that the unit have power to it and live electrical components be exposed.

USE EXTREME CAUTION WHEN TESTING THE MACHINE.

Symptom	Possible Cause	Action
The unit ignites, but will to rise above	T-mid thermistor inoperative.	Check T-mid thermistor readings at control
ignition burn.		board set points.
	T-set too low.	Check T-set is at 4.25 VDC.
	Obstruction in gas burners or gas nozzles.	Remove burner manifold and check for
		obstructions.
	Control board damaged.	Replace control board.
Exhaust contains dark smoke.	Incorrect gas nozzles for type of gas being	Remove burner manifold and check correct
	used.	nozzle orifice size.
	Gas leak may be present.	Check for localized large yellow flame, or a
		flame located above the burner.
	Obstruction in heat exchanger vent or air	Check for obstructions.
	intake.
Ignition attempt with flame already burning.	Flame proofing not occurring.	Check ignition wire. Check that lights above
		connection point to DSI are dimly lit
		(proofing signal is present).
Heat exchanger and recirculating pump de-	Failure or incorrect setting of thermostat.	Back thermostat CCW one full turn and
energize at end of rinse cycle with wash		restart unit. When cycle completes, set
tank temperature below 170 F.		thermostat to 170 F by turning CW.

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