Lincoln Pizza Oven Service Manual and Error Code

Pizza Oven Error Code, Service Manual, Troubleshooting , Wiring Diagram , Pizza Oven Parts

Old Model Number	→		New   Model Number
1433-000-E	→		1433-00z-U-Kxxxx (Europe)
1433-000-E	→		1446-00z-U-Kxxxx (Asia)
1434-000-E	→		1434-00z-U-Kxxxx (Europe,   Middle East, Africa)
1434-000-E	→		1447-00z-U-Kxxxx (Asia)
1456	→		1446-00z-U-Kxxxx
1457	→		1457-00z-U-Kxxxx

MODEL 1433-000-E		230VAC						50 HZ.		NAT. GAS
MODEL 1434-000-E		230VAC						50 HZ.		LP GAS
MODEL 1456		220/240VAC						50 HZ.		NAT. GAS
MODEL 1457		220/240VAC						50 HZ.		LP GAS

POWER SUPPLY							Electrical power is to be supplied to the oven by a three conductor      service.      Brown conductor is hot. Blue conductor is neutral. Green conductor is ground.
CONTROL BOX AUTO      COOL DOWN							When the temperature in the control box reaches 120°F ± 3°F (48.9°C      ± 1.7°C), the cooling fan thermostat will switch power to the control box cooling fan. The thermostat will interrupt power to the cooling fan when the control box temperature falls to 100°F ± 3°F (37°C ± 1.7°C).
MAIN FAN CIRCUIT							Electrical power is permanently supplied, through the 10 Amp oven fuse, to a normally open contact of the oven power switch. Power is      also supplied to the control box cooling fan. Closing the oven power switch supplies line voltage to the main fan motor. Closing the oven      power switch also supplies line voltage to the heat circuit and to the primary of the oven control transformer.
BURNER CIRCUIT							Closing the oven power switch supplies line voltage through the main fan air pressure switch, through the normally closed oven cavity hi-limit      thermostat. Through the gas pressure proving switch (gas pressure switch removed at S/N N31348) to the ignition control. The combustion      motor is now energized, the normally open combustion air switch      closes upon sensing air. After a pre-purge period between 30 and 60 seconds, the spark generator and the main gas valve are energized. Ignition should now occur
TEMPERATURE   CONTROL							Closing the oven fan switch supplies line voltage to the primary of the      control transformer and through the ignition control, to the oven control. Secondary voltage, 24VAC, is supplied to the oven control. The oven control is set to desired temperature. The thermocouple will      provide varying millivolts to the oven control.   The oven control supplies   line voltage to the temperature regulation valve at intermittent intervals   to maintain desired temperature.   The display on the oven control will indicate when the temperature regulation valve is energized.      NOTE: The display also indicates oven temperature.
CONVEYOR DRIVE							Closing the oven power switch supplies   line voltage to the conveyor   motor and to the primary of the control transformer. Secondary      voltage, 24VAC, is supplied to the oven control.   Setting the oven control to the desired time outputs voltage, through a reversing   switch,      to the conveyor motor.      NOTE: The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor. If the motor is not running, “BELT JAM” is indicated on the display.

POWER SUPPLY							Electrical power is to be supplied to the oven by a three conductor      service.      Brown conductor is hot. Blue conductor is neutral. Green conductor is ground.
CONTROL BOX AUTO      COOL DOWN							When the temperature in the control box reaches 120°F ± 3°F (48.9°C      ± 1.7°C), the cooling fan thermostat will switch power to the control box cooling fan. The thermostat will interrupt power to the cooling fan when the control box temperature falls to 100°F ± 3°F (37°C ± 1.7°C).
MAIN FAN CIRCUIT							Electrical power is permanently supplied, through the 10 Amp oven fuse, to a normally open contact of the oven power switch. Power is      also supplied to the control box cooling fan. Closing the oven power switch supplies line voltage to the main fan motor. Closing the oven      power switch also supplies line voltage to the heat circuit and to the primary of the oven control transformer.
BURNER CIRCUIT							Closing the oven power switch supplies line voltage through the main fan air pressure switch, through the normally closed oven cavity hi-limit      thermostat. Through the gas pressure proving switch (gas pressure switch removed at S/N N31348) to the ignition control. The combustion      motor is now energized, the normally open combustion air switch      closes upon sensing air. After a pre-purge period between 30 and 60 seconds, the spark generator and the main gas valve are energized. Ignition should now occur
TEMPERATURE   CONTROL							Closing the oven fan switch supplies line voltage to the primary of the      control transformer and through the ignition control, to the oven control. Secondary voltage, 24VAC, is supplied to the oven control. The oven control is set to desired temperature. The thermocouple will      provide varying millivolts to the oven control.   The oven control supplies   line voltage to the temperature regulation valve at intermittent intervals   to maintain desired temperature.   The display on the oven control will indicate when the temperature regulation valve is energized.      NOTE: The display also indicates oven temperature.
CONVEYOR DRIVE							Closing the oven power switch supplies   line voltage to the conveyor   motor and to the primary of the control transformer. Secondary      voltage, 24VAC, is supplied to the oven control.   Setting the oven control to the desired time outputs voltage, through a reversing   switch,      to the conveyor motor.      NOTE: The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor. If the motor is not running, “BELT JAM” is indicated on the display.

SYMPTOM						POSSIBLE   CAUSE							EVALUATION
Oven fan will not   run						Incoming power supply							Check circuit breaker, reset if required. Check power      plug to be sure it is firmly in receptacle. Measure incoming power, call power co. if required.
						Fuse, 10 Amp							Check, replace if   necessary.
						Fuse holder							Check, replace if   necessary.
						Switch, oven power							Check for line voltage supplied to switch. If no voltage is      present, trace wiring back to fuse holder. Check continuity between switch terminals. Replace switch as needed.
						Motor, main fan							Check for line voltage supplied to motor. If no voltage is      present, trace wiring back to oven power switch. Check motor for opens, shorts or grounds.      WITH POWER OFF: Turn fan blade to check for locked rotor.
No control box   cooling						Incoming power supply							Check circuit breaker, reset if required. Check power      plug to be sure it is firmly in receptacle. Measure incoming power, call power co. if required.
						Fuse, 10 Amp							Check, replace if   necessary.
						Fuse holder							Check, replace if   necessary.
						Switch, oven power							Check for line voltage supplied to switch. If no voltage      is present, trace wiring back to fuse holder. Check continuity between switch terminals. Replace switch as needed.
						Cooling fan							Check for supply voltage to the cooling fan. If no      voltage is present, trace wiring back to the fuse holder. If voltage is present and motor does not run, check motor for opens shorts or grounds.      WITH POWER OFF: Check for locked rotor.
No automatic control box cooling						Incoming power supply							Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure      incoming power, call power co. if required.
						Cooling fan thermostat							Check cooling fan thermostat (thermostat closes at      120°F and opens at 100°F). With cooling fan thermostat pre-heated, check for continuity
Control box cooling fan      continues to run						Cooling fan thermostat							See “Cooling fan thermostat” (NOTE: Thermostat will      remain closed if control box temperature remains above      120°F.
Oven will not heat						Main fan							If not operating, refer to   “Oven fan will not run”
S/N N31348 and      Below						Gas supply							Check for adequate gas supply and be sure that the manual gas shut off valve is open. Also check flexible      gas line connection.
						Air pressure switch							Check air switch terminals for supply voltage to      terminals NO2 and COM. If voltage is present on one side only, check for air tube blockage or misalignment. If these are okay, adjust air pressure switch or replace switch as needed.
						Oven cavity hi-limit thermostat							Terminals are normally closed, opens at 350°C (660°F). If open, reset and test oven for proper operation. If thermostat will not hold for maximum temperature, and oven is not exceeding control setting, check for proper location of the capillary bulb in its spring holder. If above checks are okay, replace hi-limit thermostat.
						Gas pressure switch							This switch is located inside the gas valve and should      close when gas pressure is present.
													WITH POWER OFF: Remove 3 prong plug (on gas      valve) and measure continuity between terminals 2 and      3. If no continuity, check the following: Proper gas pressure supply to gas valve as marked on the oven specification plate. Check for proper adjustment of the      gas pressure switch, 10 for Nat. gas, 27 for LP gas or      4.5 for town gas. Check the filter in the gas valve for blockage or damage. If above checks are okay, but pressure switch is still not closed, replace gas valve.
						Ignition control							Check for supply voltage to ignition control at terminal      #1 and neutral. If no voltage is present, trace wiring back to gas pressure switch. If voltage is present, check for supply voltage to burner blower motor at terminal #6 and neutral.   If no voltage is present, wait 30 seconds, reset ignition   control, and re- try. If the above fails, replace ignition control.
						Burner reset switch							Switch is normally open. Check to see that the switch      closes when reset button is pushed. Replace as needed.
						Burner blower motor							Check for supply voltage to burner blower motor. If no voltage is present, trace wiring back to the ignition      control.      WITH POWER OFF: Turn blower wheel to check for locked rotor.      If supply voltage is present and motor does not run, replace burner blower motor.
						Burner blower motor air pressure switch							Check for supply voltage switching to terminal   NO as the air pressure switch closes. Check for air tube blockage      or misalignment, adjust air pressure switch. If the above fails, replace air pressure switch.
						Spark generator							After a pre-purge time of 30 to 60 seconds after burner blower motor starts, check for supply voltage to spark      generator. If voltage is not present, check burner reset switch. If voltage is still not present, replace ignition      control. If voltage is present, visually check for spark at igniter.
						Igniter/sensor assembly							Check for visible damage to the igniter/sensor assembly. If there is no visible damage to the components, and no      spark, replace the spark generator. If there is visible damage to the igniter/sensor assembly, replace. Also      check for frayed or damaged wires in burner tube.
						Gas valve							Check for supply voltage to gas valve. If no voltage is      present, check reset button. Check all connections for tightness. If there is still no voltage at the gas valve, replace ignition control. If there is voltage present, check for gas pressure at gas pressure tap located in gas piping. If there is no gas pressure, replace gas valve.
Flame will not   stay on						Flame sensor							Check for flame sensor operation, connect a digital multimeter   (capable of measuring DC microamps)      between the flame sensor wire and terminal #1 on the ignition   control. Sensor current is to be 3 microamps,      minimum. If these readings are not achieved, replace      igniter/sensor assembly.   Also check for any type of damage to flame sensor wire and connections.      NOTE: The DC microamp test must be conducted with the oven in low flame (bypass) operation.
						Power supply							Set the temperature to the lowest temperature setting. If there is sufficient microamp current,   but the flame will      not stay on, check for proper polarity of the power supply.
						Ignition control							If there is sufficient microamp current, and there is proper polarity of the power supply, but the burner will
													not stay on, check the reset button for the ignition      control. If the above check okay, replace ignition   control.
Oven will not heat      S/N N31349 and      Above						Main fan							If not operating, refer to   “Oven fan will not run”
						Gas supply							Check for adequate gas supply and be sure that the      manual gas shut off valve is open. Also check flexible   gas line connection..
						Air pressure switch							Check air switch terminals for supply voltage to      terminals COM and NO. If voltage is present on one side only, check for air tube blockage or misalignment. If      these are okay, adjust air pressure switch or replace switch as needed.
						Oven cavity hi-limit thermostat							Terminals are normally closed, opens at 350°C (660°F). If open, reset and test oven for proper operation. If thermostat will not hold for maximum temperature, and oven is not exceeding control setting, check for proper location of the capillary bulb in its spring holder. If above checks are okay, replace hi-limit thermostat.
						Ignition control							Check for supply voltage to ignition control at terminal      #1 and neutral. If no voltage is present, trace wiring back to hi-limit thermostat. If voltage is present, check for      supply voltage to burner blower motor at terminal #8 and      neutral. If no voltage is present, wait 30 seconds, reset ignition control, and re- try. If the above fails, replace ignition   control.
						Burner reset switch							Switch is normally open. Check to see that the switch      closes when reset button is pushed. Replace as needed.
						Burner blower motor							Check for supply voltage to burner blower motor. If no      voltage is present, trace wiring back to the ignition control.      WITH POWER OFF: Turn blower wheel to check for locked rotor.      If supply voltage is present and motor does not run,      replace burner blower motor.
						Burner blower motor air      pressure switch							Check for air pressure switch to be switching from “NC”      to “NO”. Check for air tube blockage or misalignment. Adjust air pressure switch. If the above fails, replace air pressure switch.
						Ignition control							A pre-purge time of 30 to 60 seconds occurs after      burner blower motor starts. Check for high voltage spark output from the ignition control. If there is no high      voltage spark output, check reset button for the ignition control. If there is still no high voltage output, replace the      ignition control.
						Igniter/sensor assembly							Check for visible damage to the igniter/sensor assembly.      If there is visible damage to the igniter/sensor assembly, replace. If there is no visible damage to the components, and no spark, replace the igniter/sensor assy. Also      check for frayed or damaged wires in burner tube. Replace components as needed.
						Ignition control							Gas valve should open as the ignition control generates      the high voltage spark. Check for supply voltage to pilot valve at terminal #5 and neutral. If no voltage is present, check reset button for the ignition   control. If there is still no voltage to the pilot valve, replace ignition control.
						Gas valve							Check for supply voltage to pilot valve terminal #5 to      neutral, if there is no voltage, trace wiring back to ignition control. If there is supply voltage, connect a manometer to the pressure tap fitting on the gas valve. If
													there is voltage to the pilot valve, but there is no gas      pressure, replace gas valve.
						Pilot tube							Check for gas pressure at pilot tube. Disconnect pilot tube at burner and connect manometer. If there is no      gas pressure, check for blockage in pilot tube. Repair or replace as needed.
						Pilot orifice							If there is gas pressure at the pilot tube, check the pilot orifice for damage or obstructions. Replace pilot orifice      as needed.
Flame will not   stay on						Flame sensor							To check flame sensor operation, connect a digital      multimeter (capable of measuring D.C. microamps) between the flame sensor wire and the flame sensor connection on the ignition control (terminal #13). Flame sensor current is to be 0.7 microamps, minimum.   If these readings are not achieved, replace igniter/sensor assembly.   Also check for any type of damage to flame sensor wire and connections.      NOTE: The D.C. microamp test must be conducted with the oven in low flame (bypass) operation.
						Power supply							Set the temperature to the lowest temperature setting. If there is sufficient microamp current,   but the flame will      not stay lit, check for proper polarity of the power supply.
						Ignition control							If there is sufficient microamp current, and there is      proper polarity of the power supply, but the burner will      not stay lit, check the reset button for the ignition control. If the above test is okay, replace the ignition control.
						NOTE: Flame should be on at      this time
Low flame is on, but no main flame						Control transformer							Check for supply voltage to primary of control transformer. If no voltage is present, trace wiring back to      oven power switch. If voltage is present, check for      24VAC at transformer   secondary. If there is primary voltage, but no secondary voltage, replace control transformer.
						Oven control							Check for 24VAC supply to oven control. If no voltage is present, trace wiring back to control transformer. Check      for supply voltage to oven control.   If no voltage is present, trace wiring back to ignition control. If voltage is      present, check for a read-out on the display. If there is      no read-out on the display, replace oven control. If there is a read-out on the display, set the oven control to maximum temperature (see installation operations manual for temperature adjustment). With the oven control at maximum temperature, check for supply voltage to the temperature regulation valve. If there is voltage at the temperature regulation valve, proceed to “Temperature regulation valve “. If there is no voltage at the temperature regulation valve, trace wiring back to      the oven control. If there is no voltage output at the oven control, check the read-out on the oven control. If the oven control reads “PROBE FAIL” this indicates that the thermocouple has failed or become disconnected from the oven control
						Thermocouple							Check to see that the thermocouple is securely      connected to the oven control. If the thermocouple is connected to the oven control, and the display indicates “PROBE FAIL”, disconnect the thermocouple from the oven control and measure the resistance of the thermocouple. The thermocouple should read approx.      11Ω. If these readings are not achieved, replace the thermocouple. If these readings are correct, proceed.
						Oven control							If the thermocouple checks good, but the oven control      display indicates that there is a thermocouple failure, replace the oven control. If the oven control indicates a temperature reading, but the oven will not heat, proceed.
						Thermocouple							WITH POWER ON AND THERMOCOUPLE      ATTACHED TO THE OVEN CONTROL: Measure the DC millivolt output of the thermocouple. Refer to the thermocouple chart (located in the “Removal” section of the manual) for proper millivolt readings. If these readings are not achieved, replace thermocouple.
						Oven control							If the thermocouple checks good, but there is no supply      voltage output to the temperature regulation valve, replace the oven control. If there is supply voltage output to the temperature regulation valve, proceed.
						Temperature regulation   valve							Check for supply voltage to the temperature regulation      valve. If voltage is present, listen for valve to open and close. Also check for opens or shorts in the operating coil. Replace temperature regulation valve as needed.
Intermittent   heating						Thermal/overload of main fan      and burner blower motor							The main fan motor and burner blower motor are      equipped with internal thermal protection and will cease to operate if overheating occurs. As the motors overheat and cool, this will cause the heating system to cycle on and off intermittently.   Improper ventilation or lack of preventive maintenance may cause this problem. Also most of the problems listed under “Oven will not heat” can cause intermittent failure.
Conveyor will not   run						Incoming power supply							Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure      incoming power, call power co. if required.
						Fuse, 10 Amp							Check, replace if   necessary.
						Fuse holder							Check, replace if   necessary.
						Switch, oven power							Check for line voltage supplied to switch. If no voltage is present, trace wiring back to fuse holder. Check      continuity between switch terminals. Replace switch as needed.
						Control transformer							Check for supply voltage to primary of control transformer. If no voltage is present, trace wiring back to      oven power switch. If voltage is present, check for      24VAC at transformer   secondary. If there is primary voltage, but no secondary voltage, replace control transformer.
						Conveyor motor							Check for supply voltage to the conveyor motor at      terminal #6 to neutral. If no voltage is present, trace wiring back to oven power switch. If voltage is present, but the motor will not run, check the motor windings for opens or shorts. If any of the above checks fail, replace conveyor motor.
						Capacitor, conveyor motor							Check for shorts or grounds. Replace capacitor as      needed.      WARNING: Capacitor has a stored charge, discharge before testing.
						Switch, conveyor reversing							Check continuity   between switch terminals. Replace      switch as needed.
						Oven control							If there is voltage supplied to the motor, and the motor capacitor and reversing   switch check good, replace the      oven control.
Conveyor motor runs,      but there is no speed display						NOTE: Display will indicate      “BELT JAM”
						Oven control							Check for output voltage   from oven control to hall effect
													sensor (sensor is located in the conveyor motor).      Measure voltage at the motor connector, red wire and yellow wire. Voltage should be approx. 10VDC. If no voltage is present, trace wiring back to oven control. If there is no voltage output at the oven control, replace oven control.
						Conveyor motor							If there is voltage supplied to the hall effect sensor,      check for a frequency output from the hall effect sensor. Measure frequency across the yellow and white wires in the motor connector. Frequency reading should be approx. 25-100 Hz. If these readings are not achieved, replace conveyor motor. If the readings are achieved, proceed.
						Oven control							If the hall effect sensor readings are correct, but there is      no speed indicated on the display, replace the oven control.

LETTER					PART   NUMBER				DESCRIPTION
A					369003				Door hinge
B					369110				Access window assembly
C					369337				Retainer (old style)
					369929				Retainer (new style)
D					369828				Handle spacer
E					369209				Latch & strike
F					369310				Screw, 6-32 x 3/16”
G					369308				Bottom, access window
H					369334				Access door glass
J					369309				Top, access window
K					350638				Handle
L					369311				Handle spacer (2 req.)
M					369336				Door latch
N					369906				Screw, 8-32 x 5/8”
O					370110				Door assembly (solid)
P					369157				Door assembly (with   window)
Q					1534				Finger support assembly
R					369057				Support bracket pin
S					369643				Strike assembly
T					1009				Oven top
U					369062				Top, control box
V					369140				Compression spring
W					369903				Washer, flat
X					369141				Conveyor hold down bracket
Y					369139				Shoulder screw
Z					369058				Baffle, inlet and outlet
*					369211				Thumb screw (not shown)
AA					369203				Stud, wing head
BB					369749				Chain cover kit (includes   AA, CC)
CC					369204				Split ring retainer
DD					369373				Receptacle, snap –in
EE					369748				Bracket, chain cover
FF					369328				Leg, stand
GG					369052				Adjustable leg
HH					369030				Caster, 6”
JJ					369904				Insulation holder assembly
KK					369053				Finger housing
LL									Columnating plates –      see installation operations manual
MM					369055				Finger cover
NN					369218				Crumb pan, internal
OO					369926				Window frame, bottom
PP					369925				Glass, access window
QQ					369927				Window frame, top

LETTER					PART   NUMBER						DESCRIPTION
					369110						Access Door Assembly
A					371140						Bracket Assembly, Left
B					371142						Dowel, Access Door
C					370722						Screw
D					371143						8-32 x 3/8 Hx Serr Flng
E					371141						Bracket Assembly, Right
F					370725						Dowel Thread
G					371144						Access Door Frame (top or   bottom)
H					370723						Glass

LETTER			PART   #									DESCRIPTION
A			369062									Top, Control Panel
B			370355									Oven Control
C			370363									Front Cover Assembly
D			370354									Facia, Label
E			369432									Switch, On/Off
F			369580      370433									Gas Valve, Multi Block (S/N N31348 & Below)      Gas Valve (S/N N31349 & Above)
G			369570									Connector, 3 Pole
H			369571									Connector, 4 Pole
I			370186									Solenoid Valve
J			369072									Main Orifice, Nat.
			369099									Main Orifice, LP
			370114									Main Orifice, Town Gas
K			369144									Pilot Shield Extension
L			369202									Pilot Shield, Main
M			369076									Burner Igniter
N			369075									Flame Sensor
O			369142									Flame Target
P			370362									Thermocouple (Type K)
Q			369589									Blower Motor
R			369399									Air Shutter Assembly
S			369400									Shutter, MVB Air Plate
T			369158									Drive Sprocket
U			370373									Conveyor Motor
V			370359									Reversing Switch
W			369368									Thermostat, Hi-Limit
X			369378									Cooling Fan
Y			369507									Cooling Fan Thermostat
Z			369025									Blower Air Switch
AA			369575									Air Pressure Switch
BB			369192									Capacitor
CC			370360									Capacitor, Conveyor Motor
DD			369574									Spark Generator (S/N N31348   & Below)
EE			369579									Solid State Alarm
FF			370241									Transformer, Control
GG			369573      370396									Ignition Control (S/N N31348 & Below) Ignition Control (S/N N31349 & Above)
HH			369331									Finger Guard
II			369073      369100									Bypass Orifice, NAT      Bypass Orifice, LP
Not shown			357107									Fuse holder
Not shown			369014									Fuse, 10 A.

LETTER				PART   NUMBER					DESCRIPTION
A				369808					Cover, motor (gas ovens)
				370140					Cover, motor (electric   ovens)
B				369214					Motor, main fan (50 Hz.)
C				369033					Motor clamp
D				369215					Motor support assembly
E				369192					Capacitor, 7.5 MFD
F				369306					Oven back assembly, gas   oven
G				369646					Stand-off
H				369647					Inlet panel
J				369213					Main fan
K				369547					Bracket, thermostat
M				369287					Heating element, 208V
				369315					Heating element, 220V
				369122					Heating element, 240V

LETTER				PART   NUMBER					DESCRIPTION
				369830					Complete conveyor assembly
A				369816      369163					Conveyor belt, complete (30 inch wide belt)      Conveyor belt, complete (32 inch wide belt)
				370092      369362					Conveyor belt, 1 foot section (30 inch wide belt) Conveyor belt, 1 foot section (32 inch wide belt)
B				369825					Retaining ring
C				369813					Conveyor bearing block
D				369314					Roll, conveyor, notched
E				369812					Conveyor idler shaft
F				369160					Conveyor pan stop
G				369814      369005					Connecting link (30 inch wide belt)      Connecting link (32 inch wide belt)
H				369811					Conveyor drive shaft
J				369161					Roller chain sprocket
K				369806					Crumb pan
L				370050					Conveyor frame
M				369162					Drive chain