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

Page 10

 

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.

 

Magnet

Check to insure that the magnet (cemented to

 

 

shaft of conveyor drive motor) has not been

 

 

damaged, or come loose from the motor shaft.

 

 

Re-glue or replace as needed.

 

Hall effect sensor

Check for any physical damage to hall effect

 

 

sensor (mounted on conveyor drive motor).

 

 

Check all wiring and connections for damage.

 

 

Replace as needed.

 

Hall effect sensor cable

Check continuity through the wires in the cable.

 

 

Check all wiring and connections for visible

 

 

damage. Replace as needed.

 

DC motor control board

With motor running, measure DC voltage

 

 

across the red wire and black wire in the hall

 

 

effect cable (all wires must be connected

 

 

during this test). Voltage reading should be

 

 

approx. 12VDC and steady. If this reading is

 

 

not achieved, replace DC motor control board.

 

Hall effect sensor

With the motor running at maximum speed,

 

 

measure the frequency across the white wire

 

 

and the black wire in the hall effect cable (all

 

 

wires must be connected during this test).

 

 

Reading should be approx. 327 Hz. And

 

 

steady. If there is no reading, replace hall effect

 

 

sensor. If the reading is unsteady, calibrate the

 

 

DC motor control board.

Temperature display

Display transformer

Measure the transformer primary for supply

inoperative

 

voltage input. If voltage is not present, trace

 

 

wiring back to the oven fan switch. Measure

 

 

the secondary output, which will normally be

 

 

12-15VAC. Voltage across terminals 1-3

 

 

should be 12-15VAC. Terminals 1-2 and 2-3

 

 

should be ½ the voltage reading 1-3. If the

 

 

above secondary readings are not achieved,

 

 

replace transformer.

 

Temperature display

If proper voltage is present at terminals 1,2 and

 

 

3 on temperature display, but the display is not

 

 

lighted, recheck all connections for tightness. If

 

 

temperature display is still not operating,

 

 

replace the temperature display.

Temperature display

Thermocouple

Place the thermocouple of a pyrometer into the

inaccurate, or erratic

 

center of the top finger. The pyrometer will

 

 

indicate oven temperature. Measure DC

 

 

millivolts of thermocouple at the temperature

 

 

display. See thermocouple chart in “Removal

 

 

and Installation” section for proper readings.

 

 

Replace thermocouple if proper readings are

 

 

not achieved. If readings are correct on the

 

 

thermocouple, recalibrate or replace

10

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

Image 10
Contents Impinger Countertop Oven Temperature Display Power SupplyTemperature Control Control BOX Auto Cool DownHeat Circuit Schematic Diagram Model 1164-000-EA Refer to Proper Schematic for Identified Components Symptom Possible Cause EvaluationPage Page Page Page Troubleshooting Guide Electric Ovens Page Page Page CAPACITOR, Motor Replacement MOTOR, Main FAN ReplacementMain FAN Replacement ON/OFF Switch ReplacementCooling FAN, Control BOX Replacement Fuse Holder ReplacementTHERMOSTAT, Control BOX HI-LIMIT Replacement THERMOSTAT, Cooling FAN ReplacementThermocouple Measurement Chart Information Thermocouple ReplacementElectronic Temperature Control Replacement Heat Light Replacement Electronic Temperature Control CalibrationTemperature Control Potentiometer Replacement Ignition Control ReplacementTemperature Regulation Valve Replacement Bypass Orifice ReplacementIGNITER/SENSOR Assembly Replacement Main Burner Orifice Replacement Burner Alarm ReplacementSpark Generator Replacement Merury Contactor ReplacementCircuit Breaker Replacement Conveyor Control Potentiometer ReplacementConveyor Control Board Replacement Conveyor Drive Motor ReplacementTemperature Display Replacement Hall Effect Sensor ReplacementTemperature Display Transformer Replacement Temperature Display CalibrationThis page intentionally left blank General View Impinger II Advantage Letter Part Number DescriptionPage 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