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SERVICE MANUAL
(DOMESTIC AND INTERNATIONAL)
IMPINGER CONVEYOR OVENS
MODEL 1400 SERIES ADVANTAGE
Lincoln Foodservice Products, LLC
1111 North Hadley Road
Fort Wayne, Indiana 46804
United States of America
Phone : (800) 374-3004
U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735
Technical Service Hot Line
(800) 678-9511
www.lincolnfp.com
1450DomExptSvc REV: 9/25/08
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TABLE OF CONTENTS TABLE OF CONTENTS.......................................................................................................................................................... 2 SEQUENCE OF OPERATION................................................................................................................................................ 4 MODEL 1450 / 120 VAC / 60 HZ / NATURAL GAS ............................................................................................
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SEQUENCE OF OPERATION MODEL 1450 / 120 VAC / 60 HZ / NATURAL GAS MODEL 1451 / 120 VAC / 60 HZ / LP GAS MODEL 1480 / 120 VAC / 60 HZ / TOWN GAS POWER SUPPLY Electrical power is supplied to the oven by a three-conductor cordset. Voltage from the black conductor to white conductor is 120 VAC. The white conductor is neutral. The green conductor is ground. CONTROL BOX When the temperature in the control box reaches 120°F±3° AUTO COOL DOWN (48.9°C±1.7°C), the cooling fan thermostat will swi
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energized, the normally open contacts close, energizing the main fan motor and cooling fan. Closing the main fan switch also supplies power to the conveyor control and the centrifugal switch of the main fan motor. HEAT CIRCUIT Closing the on/off switch supplies 120 VAC to the normally open centrifugal switch (inside the main fan motor). As the motor reaches approximately (900 RPM) the centrifugal switch closes supplying 120 VAC through the normally closed oven cavity and control box hi-limi
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SEQUENCE OF OPERATIONS MODEL 1456 / 220-240 VAC / 50 HZ / NATURAL GAS MODEL 1457 / 220-240 VAC / 50 HZ / L.P. GAS MODEL 1474 / 220-240 VAC / 50 HZ / NATURAL GAS MODEL 1475 / 220-240 VAC / 50 HZ / L.P. GAS MODEL 1476 / 220-240 VAC / 50 HZ / TOWN 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 When the temperature in the control box reaches 12
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SCHEMATIC 1450 / 1451 / 1480 6 Impinger I – 1400 Series Advantage Service Manual - Dom & Int’l
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SCHEMATIC 1452 / 1453 Impinger I – 1400 Series Advantage Service Manual – Dom & Int’l 7
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SCHEMATIC 1454 / 1455 8 Impinger I – 1400 Series Advantage Service Manual - Dom & Int’l
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SCHEMATIC 1456 / 1457 Impinger I – 1400 Series Advantage Service Manual – Dom & Int’l 9
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SCHEMATIC 1474 / 1475 / 1476 10 Impinger I – 1400 Series Advantage Service Manual - Dom & Int’l
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TROUBLESHOOTING GUIDE GAS OVENS IMPINGER ADVANTAGE SERIES SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming Power Supply Check breakers, reset if required. Call Power Co. if NOTE: needed (Export Ovens) For some export ovens, there is a control circuit step- down transformer. This transformer steps down supply voltage to 120 VAC. If main fan will not run, the secondary of this transformer must be checked for 120 VAC output. Check specific oven model schematic for ci
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Centrifugal Switch of Burner Check for 24 VAC output from secondary of Blower Motor transformer. If voltage is present, check for 24 VAC at pin 6 and ground on ignition control. If the burner blower motor is running and there is no voltage at pin 6 and the ground on the ignition control, replace the burner blower motor. Ignition Control Check for 24 VAC supply to the ignition control at pin 6 and the ground. If voltage is present, check for 24 VAC across pin #3 and ground (pilot valve).
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Thermocouple Probe Remove thermocouple leads from the temperature control board, and measure the millivolt output of these leads. Refer to charts on page 25 in the adjustment section for proper readings. Temperature Control Turn temperature control dial to full "on" position. NOTE: Thermocouple must be connected. Measure for 120 VAC across terminals "N.O." and Com., if voltage is not present; replace control. Solenoid Valve If voltage is present at terminals "N.O." and Com., check for v
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DC Motor Control Board Check for 120 VAC input to the control board at terminals L1 and L2. If not present, check the oven fan switch and wiring back to 3 amp fuse and then back to power source if necessary. If 120 VAC is present at L1 and L2, check both fuses on control board (4A line) and (1A armature), check the VDC output at terminals A+ and A-. If 120 VAC is present at terminals L1 and L2, and DC voltage is present A+ and A-, but motor does not run, check gear motor as follows.
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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.NOTE: Remove insulation pad below plug to read numbers. If no continuity, check the following: 1. Proper gas pressure supply to the gas valve as marked on the oven specification plate. 2. Check for proper adjustment of gas pressure switch. 8.8 on dial for natural gas, 23 for LP
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Flame will not stay on Flame Sensor To check for flame sensor operation, connect a digital multimeter (capable of measuring D.C. micro amps) between the flame sensor wire and Ignition Control. Sensor current from sensor control is 3 micro amps minimum. If these readings are not achieved replace igniter/sensor assembly. Also check for any type of damage to flame sensor wire and connections. Ignition Control If there is sufficient flame sensor current, but the burner will not remain ignite
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Thermocouple Probe Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads. Refer to chart on Page 25 for proper readings. If the thermocouple probe checks good, replace temperature control. Flame Monitor Check for 220 VAC at terminal #1. If no voltage is present, trace wiring back to temperature control. Check for 220 VAC output at terminal #8. NOTE: There is a delay of up to 2 seconds for 220 VAC output at terminal #8. If there is
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TROUBLESHOOTING GUIDE ELECTRIC OVENS IMPINGER ADVANTAGE SERIES SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming Power Supply Check breakers/Reset if required. Call Power Co. if needed. Oven Fan Fuse Check and/or Replace Fuse Holder Check and/or Replace Fan Switch Check continuity between switch terminals. For these oven models, there is a control circuit step- 1454-1455 down transformer. This transformer steps down supply voltage to 120 VAC. If main fan will not
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Temperature Control Board Check for 120 VAC input to temperature control board. If not present, check wiring from Hi-Limit to temperature control board. Turn the temperature adjustment dial to the maximum temperature position. Check for 120 VAC at coil of mercury contactor(s). Next, short the leads of thermocouple on the temperature control board, check for 120 VAC at coil of mercury contactor(s). If voltage is not present, replace temperature control board. If voltage is present, proce
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Conveyor Gear Motor If DC voltage is present A+ and A- and the motor does not run, first check the mini breaker and then the conveyor. Refer to the next possible cause. Check motor brushes for excessive or abnormal wear, replace as needed. Check the leads to the motor for evidence of any shorts or opens, and each lead to ground. If the motor fails the above tests, replace motor. Conveyor Check for any mechanical mis-alignment or improper adjustment. Also check for worn bearings. The In
