Lincoln 1634-000-EA, 1633-000-EA Troubleshooting Guide, Symptom, Possible Cause, Evaluation

TROUBLESHOOTING GUIDE

MODEL 1633-000 EA	NATURAL GAS	230 VAC	50 HZ	1 PHASE
MODEL 1634-000-EA	L.P. GAS	230 VAC	50 HZ	1 PHASE

NOTE: When checking components on left side of unit, be sure to check for proper connections in power connector, ( marked P. C. on schematic diagram ) located inside motor cover.

SYMPTOM	POSSIBLE CAUSE	EVALUATION
Oven fan will	Incoming power supply	Check breakers/ reset if required
not run		call Power company if needed
	Oven fan switch	Check continuity between
		switch terminals.
	Thermostat, hi-limit	Terminals are normally closed, if
		open, reset thermostat and test
		oven for proper operation. If it
		will not reset, replace thermostat.
	Fan fuse	Check, replace if necessary.
	Fuse holder	Check, replace if necessary.
	Oven fan relay	Check for power to coil of oven
		fan relay. If no voltage is present,
		trace wiring back to hi-limit thermostat.
		Check for supply voltage at terminal
		#6 of the relay. If no voltage is present,
		trace wiring back to fuse holder. If
		voltage is present, at the relay coil, check
		to insure the contacts are closing.
	Capacitor(s)	Check for opens, shorts, or grounds.
	Motor (s)	Check for opens, shorts, or grounds.
No control box cooling	Fan switch	(SEE OVEN
	Hi-limit	FAN WILL
	Oven fan relay	NOT RUN.)
	Cooling fan(s)	Supply voltage should now be at these
		motors. If voltage is present, check
		motor for open, shorts, or grounds.
		WITH POWER OFF: check for
		locked rotor.
No automatic control	Incoming power supply	Check circuit breakers, reset if needed.
box cooling		Call power company if needed.
	Cooling fan thermostats	Thermostat closes at 120°F and
		opens at 100°F. With the cooling
		fan thermostat preheated, check
		for continuity. If switch is open, replace.
	Cooling fan(s)	Supply voltage should now be at these
		motors. If voltage is present, check
		motor for opens, shorts or grounds.
		WITH POWER OFF: Check for
		locked rotor.
Oven will not heat	Gas supply	Check for adequate gas supply to oven.
	Manual gas shut off valve	Check to see that the manual gas shut
		off valve is open.
	Fan switch	Check to see that the fan switch is on.
	Main oven fan	Check if main oven fan is operating.
		if not, refer to “oven fan will not run”.
NOTE: These ovens utilize 2 complete Burner/Temperature control systems. Each system will
Follow the same troubleshooting sequence.
	Fuse, burner 3A.	Check, replace if necessary.
6	Low Profile – 1600 Advantage Series Service Manual – International