Troubleshooting Guide - Lincoln Impinger Conveyor Ovens 1633-000-EA Service Manual

MODEL 1633-000 EA NATURAL GAS 230 VAC 50 HZ 1 PHASE
MODEL 1634-000-EA L.P. GAS
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
Oven fan will
not run
No control box cooling
No automatic control
box cooling
Oven will not heat
NOTE: These ovens utilize 2 complete Burner/Temperature control systems. Each system will
Follow the same troubleshooting sequence.
6

TROUBLESHOOTING GUIDE

POSSIBLE CAUSE
Incoming power supply
Oven fan switch
Thermostat, hi-limit
Fan fuse
Fuse holder
Oven fan relay
Capacitor(s)
Motor (s)
Fan switch
Hi-limit
Oven fan relay
Cooling fan(s)
Incoming power supply
Cooling fan thermostats
Cooling fan(s)
Gas supply
Manual gas shut off valve
Fan switch
Main oven fan
Fuse, burner 3A.
Low Profile – 1600 Advantage Series Service Manual – International
230 VAC 50 HZ 1 PHASE
EVALUATION
Check breakers/ reset if required
call Power company if needed
Check continuity between
switch terminals.
Terminals are normally closed, if
open, reset thermostat and test
oven for proper operation. If it
will not reset, replace thermostat.
Check, replace if necessary.
Check, replace if necessary.
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.
Check for opens, shorts, or grounds.
Check for opens, shorts, or grounds.
(SEE OVEN
FAN WILL
NOT RUN.)
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.
Check circuit breakers, reset if needed.
Call power company if needed.
Thermostat closes at 120°F and
opens at 100°F. With the cooling
fan thermostat preheated, check
for continuity. If switch is open, replace.
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.
Check for adequate gas supply to oven.
Check to see that the manual gas shut
off valve is open.
Check to see that the fan switch is on.
Check if main oven fan is operating.
if not, refer to "oven fan will not run".
Check, replace if necessary.