Lincoln 1100-000-A SERIES (SN 2038615 & BELOW) service manual

Page 9

 

 

most of the problems listed under “Oven will

 

 

 

not heat” can cause intermittent failure.

 

Conveyor will not run

Power supply

Check incoming power supply, If no voltage is

 

 

 

present, check circuit breakers.

 

 

Fan switch

With power off, Check continuity between

 

 

 

switch terminals. Replace as needed.

 

 

Speed adjustment

This is a 0 to 10K ohm, 1 turn potentiometer.

 

 

potentiometer

With power off, remove the black and white

 

 

 

pot. leads from the motor control board at

 

 

 

terminals P1 and P2. Place the meter leads on

 

 

the black and white pot. leads. Rotating the

 

 

 

pot. slowly, from low to high, the meter reading

 

 

should show an even transition from 0 to 10K

 

 

 

ohms ± 5%. There should be no dead or open

 

 

 

spots throughout the rotation of the

 

 

 

potentiometer. Check both pot. leads to

 

 

 

ground. There should be no continuity to

 

 

 

ground. If any of the above checks fail, replace

 

 

the potentiometer.

 

 

DC motor control board

Check for supply voltage input to the control

 

 

 

board at terminals L1 and L2. If voltage is not

 

 

 

present, check wiring back to the oven fan

 

 

 

switch. If supply voltage is present, check both

 

 

fuses on control board (8A line and 1A

 

 

 

armature). Check the DC voltage output at

 

 

 

terminals A+ and A-. If there is power in to the

 

 

 

control board but no power at A+ and A-, check

 

 

the following:

 

 

Hall effect sensor

Disconnect the Hall effect sensor from the DC

 

 

 

motor control board. If the motor begins to run,

 

 

replace the Hall effect sensor.

 

 

DC motor control board

If, after disconnecting the Hall effect sensor,

 

 

 

the motor is still not running, check for DC

 

 

 

voltage from terminals A+ and A-. If there is no

 

 

DC voltage, replace the DC motor control

 

 

 

board.

 

 

Circuit breaker

If there is DC voltage output from the DC motor

 

 

control board, but the motor is still not running,

 

 

check the 0.4 Amp circuit breaker. Disconnect

 

 

 

wires from the circuit breaker and check for

 

 

 

continuity through the circuit breaker. Reset

 

 

 

circuit breaker or replace as needed.

 

 

Conveyor gearmotor

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. Rotate motor shaft to determine if there

 

 

 

is a locked rotor or a locked gearbox (use care

 

 

so that magnet and sensor are not damaged).

 

 

 

Check motor brushes for damage or excessive

 

 

wear, replace brushes if needed. Replace

 

 

 

motor if needed. Also check to be sure that the

 

 

conveyor drive coupling is tight and properly

 

 

 

engaged to the conveyor shaft.

 

 

Conveyor

Check for any mechanical misalignment. Also,

 

 

 

check for worn bearings. A conveyor belt that is

 

 

too tight may cause excessive bearing wear

 

 

 

and sometimes, irregular speed.

 

Conveyor speed unsteady

Power supply

Check power supply at the DC motor control

 

 

 

board for supply voltage at terminals L1 and

 

 

 

L2. Supply voltage should be steady.

 

Impinger II – 1100-000-A Series (SN 2038615 & Below) Service Manual –Int’l

9

Image 9
Contents Impinger Countertop Oven Temperature Control Power SupplyTemperature Display Control BOX Auto Cool DownHeat Circuit Schematic Diagram Model 1164-000-EA Symptom Possible Cause Evaluation Refer to Proper Schematic for Identified ComponentsPage Page Page Page Troubleshooting Guide Electric Ovens Page Page Page Main FAN Replacement MOTOR, Main FAN ReplacementCAPACITOR, Motor Replacement ON/OFF Switch ReplacementTHERMOSTAT, Control BOX HI-LIMIT Replacement Fuse Holder ReplacementCooling FAN, Control BOX Replacement THERMOSTAT, Cooling FAN ReplacementThermocouple Replacement Thermocouple Measurement Chart InformationElectronic Temperature Control Replacement Temperature Control Potentiometer Replacement Electronic Temperature Control CalibrationHeat Light Replacement Ignition Control ReplacementBypass Orifice Replacement Temperature Regulation Valve ReplacementIGNITER/SENSOR Assembly Replacement Spark Generator Replacement Burner Alarm ReplacementMain Burner Orifice Replacement Merury Contactor ReplacementConveyor Control Board Replacement Conveyor Control Potentiometer ReplacementCircuit Breaker Replacement Conveyor Drive Motor ReplacementTemperature Display Transformer Replacement Hall Effect Sensor ReplacementTemperature Display Replacement Temperature Display CalibrationThis page intentionally left blank Letter Part Number Description General View Impinger II AdvantagePage Control BOX View Impinger II Advantage Page Model 1164-000-EA Page CONVEYOR/DOOR View Impinger II Advantage Page Oven Back View Page This page intentionally left blank This page intentionally left blank