Lincoln Foodservice 1600-000-A, Service Manual

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Low Profile – 1600 Series Advantage Digital Service Manual – Domestic 5
temperature is not exceeding 140
°
F (60
°
C), replace thermostat.
Cooling fan(s) 120 VAC should be at the motor. If voltage is not present, trace
wiring back to hi-limit thermostat. 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 and closed manual gas valves.
Also check flexible gas line connection for any damage.
Main fan If not operating, 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.
Oven power relay Check for 120 VAC to the relay coil. If voltage is not present,
trace wiring back to the control box hi-limit. If voltage is present,
check to insure contacts are closing. Check for 120 VAC
supplied to terminal #6 of the relay. If voltage is not present at
terminal #6, trace wiring back to the power source. Replace
relay as needed.
Centrifugal switch of
main fan motor
Check for 120 VAC supplied to the centrifugal switch. If no
voltage is present, trace wiring back to the oven power relay. If
voltage is supplied to the centrifugal switch, and the motor is
running, but there is no voltage out of the centrifugal switch,
replace the main fan motor.
NOTE: See schematic diagram for proper wire numbers on
motors.
Fuse, burner 10Amp Check, replace if necessary.
Fuse holder Check, replace if necessary.
Burner blower motor Check for 120 VAC supplied to burner blower motor. If voltage is
not present, trace wiring back to oven power relay. If voltage is
present and motor does not run, replace burner blower motor.
WITH POWER OFF: Check for locked rotor.
Burner transformer Check for 120 VAC to the primary of the 24 VAC burner
transformer. If voltage is not present, trace wiring back to the
burner fuse. If voltage is present, check for 24 VAC at the
transformer secondary. If no secondary voltage is present,
replace the transformer.
Centrifugal switch of
burner blower motor
Check for 24 VAC to the centrifugal switch of burner blower
motor (see schematic diagram for proper wire numbers). If no
voltage is present, trace wiring back to the burner transformer. If
voltage is present, check for 24 VAC at the output of the
centrifugal switch. If there is no output, and the burner blower
motor is running, replace the burner blower motor.
Ignition control Check for 24 VAC supply to the ignition control at terminals 24V
and 24Vgnd. If voltage is not present, trace wiring back to the
centrifugal switch. Check for 120 VAC supply to the ignition
control at terminals L1 and L2. If no voltage is present, trace
wiring back to burner fuse. If the above checks are okay,
proceed. The ignition control should switch 120 VAC to the hot
surface igniter, across the two terminals marked HSI. If no
voltage is present, replace the ignition control.
Hot surface igniter
(located inside
burner assy.
If 120 VAC is present at HSI terminals, visually check to see that
the hot surface igniter is heating (igniter may be viewed through
port in the end of burner tube). The igniter should glow bright
red. Check all connections to be sure they are tight. If the igniter
does not heat, replace hot surface igniter.