Lincoln 1450, 1451 service manual Troubleshooting Guide, Symptom Possible Cause Evaluation

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TROUBLESHOOTING GUIDE

IMPINGER ADVANTAGE GAS OVENS SERIAL NUMBER N28654 AND ABOVE (OVENS WITH PUSH BUTTON CONTROLS)

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 needed.

 

Fuse, 10 Amp

Check, replace if necessary.

 

Fuse holder

Check, replace if necessary.

 

Switch, oven power

Check for 120VAC supply 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 120VAC supply to the motor. If no voltage is

 

 

present, trace wiring back to the 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 needed.

 

Fuse, 10 Amp

Check, replace if necessary.

 

Fuse holder

Check, replace if necessary.

 

Switch, oven power

Check for 120VAC supply 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 120VAC supply to the cooling fan. If no

 

 

voltage is present, trace wiring back to the oven power

 

 

switch. If voltage is present and motor does not run,

 

 

check for opens, shorts or grounds.

 

 

WITH POWER OFF: Check for locked rotor.

No automatic control

Incoming power supply

Check circuit breaker, reset if required. Check power

box cooling

 

plug to be sure it is firmly in receptacle. Measure

 

 

incoming power. Call power co. if needed.

 

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. If

 

 

thermostat is open, replace cooling fan thermostat.

Control box cooling

Cooling fan thermostat

See “Cooling fan thermostat” (NOTE: Thermostat will

fan continues to run

 

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”.

 

Gas supply

Check for adequate gas supply to oven.

 

Centrifugal switch of main fan

Check for 120VAC at wire #5 (input to centrifugal

 

motor

switch, located at 6-pin connector inside motor cover

 

 

near main fan motor) to neutral. If no voltage is present,

 

 

trace wiring back to oven power switch. If voltage is

 

 

present, check for 120VAC at wire #9 (output of

 

 

centrifugal switch) to neutral. If no voltage is present at

 

 

wire #9, and the motor is running, replace the main fan

 

 

motor.

 

Burner blower motor

Check for 120VAC supplied to burner blower motor. If

 

 

no voltage is present, trace wiring back to primary of

 

 

control transformer. If voltage is present and motor is

4

 

Impinger I – 1450 Series Service Manual - Domestic

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Contents Impinger Conveyor Ovens NAT. GAS LP GASSchematic Diagram Troubleshooting Guide Symptom Possible Cause EvaluationNot running, check for opens, shorts or grounds With Power on and Thermocouple Belt JAM FAN, Main Replacement CAPACITOR, Motor ReplacementCooling FAN, Control BOX Replacement FAN Spider FAN HUB ConeTHERMOSTAT, Cooling FAN Replacement Burner Blower Motor ReplacementTo Remove the Blower Wheel for Periodic Cleaning Burner Control ReplacementManifold Pressure Adjustment AdjustmentTemperature Regulation Valve Replacement Burner Ignitor Replacement Thermocouple ReplacementThermocouple Measurment Temperature Millvolts Approx Burner Control Transformer ReplacementMain Orifice Replacement Pilot Orifice ReplacementON-OFF Switch Replacement Oven Control ReplacementThis page intentionally left blank General View Advantage Series Letter Part Number DescriptionPage N28654 and Above Letter DescriptionPage Oven Back Advantage Series GAS and Electric Page Conveyor 1450 Series Page This page intentionally left blank This page intentionally left blank