Lincoln Impinger Conveyor Ovens 1634-000-EA - Manual (Page 6)

Low Profile – 1600 Advantage Series Service Manual – International 6
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.