Lincoln Series 1000 Manuel D’Utilisation

Impinger I -–1000 Series Service Manual - International

Conveyor Drive(Stepper)

Motor

Check the drive sprocket on motor output shaft to

insure that it is tight. Check motor windings

measurement should be approximately 2 ohms.

Terminals 1-5, 2-6, 3-7, 4-8. WITH POWER OFF:

Turn the motor shaft to check for jammed gear box.

If motor shaft will not turn, replace conveyor

drive(stepper) motor.

12 VAC Power Supply

(Transformer)

Measure the transformer primary for a nominal 120

VAC input, if voltage is not present, trace wiring

back to the oven fan switch. Measure the

secondary output, which will normally be 12-15

VAC. Voltage across terminals 1 and 3 on the

time/temp. display should read 12-15 VAC.

Terminals 1-2 and 2-3 should be 1/2 the voltage

reading 1 to 3. If the above secondary readings are

not achieved, replace transformer.

Time/Temp. Display

inoperative

Time/Temp. Display

If proper voltage is present at terminal 1,2, and 3

on time/temp. display, but the display is not lighted,

recheck all connections for tightness. If time/temp.

display is still not operating, replace the time/temp.

display.

NOTE: Time/temp displays

use two types of temperature

sensor Thermistor Probe - 2

yellow wires. Thermocouple

Probe - 1 red & one white

wire

Place your pyrometer thermocouple into the center

between finger T2 and T3 in the oven. Disconnect

the yellow tipped thermistor leads from the

time/temp. terminals 9 and 10. Measure the

resistance of the thermistor probe.

Thermistor Probe

See chart on page 72 for proper resistance

readings. Inspect the thermistor bulb for its proper

location in its spring holder. Check for short in

leads where they enter the sensor bulb. Also check

each thermistor lead for short to ground.

Thermocouple Probe

Place your pyrometer thermocouple into the center

between fingers T2 and T3 in the oven. Connect

temperature meter to thermocouple at terminals 9

& 10 on back of the time/temp display. (Be sure to

maintain proper polarity on thermocouple

connections.) Compare actual oven temperature

with the reading at the time/temp display. If the

temperature readings match, recalibrate or replace

time/temp display. If the readings do not match,

replace thermocouple probe.

Temp. Display out or

inaccurate

Power Supply

If a strange or unusual behavior is experienced,

such as a rolling of numbers, or lock-up at a given

number, first check for a display circuit lock-up.

This may be caused by a voltage spike or surge in

the incoming power lines. To eliminate this

condition, remove power from time/temp. display by

shutting off the main fan switch for 15 seconds.

This should eliminate the problem. If this does not

solve the problem, it may becoming in through the

Commercial power lines. Suggest that customer

contact their power company for evaluation.