Lincoln 1100 Series Manuel D’Utilisation

then the problem is usually with thetemperature

control board.

Temperature Control

If 120 VAC is present on the

Valve

temperature control board at load

terminal to neutral, check for voltageat Tempera

ture Control valve. If voltage is present, listen for

valve to open and close. Also check for

opens or shorts in the coil.

Replace if required.

Intermittent heating

Thermal Overload Of

Both the main fan motor and the

Main Fan and Burner

burner blower motor are equipped

Blower Motors

with internal thermal protection and

will cease to operate if overheatingoccurs. As the

motors overheat and then cool, this will cause the

unitsto cycle on and off intermittently.

This may be caused by improper ventilation or

preventativemaintenance. Also, most of the

problems listed under “Oven Will Not

Heat” can cause intermittent failure.

Conveyor will not run

3 Amp Fuse

Check and replace if defective.

Fuseholder

Check and replace if defective.

Fan Switch

Check for continuity between switch

terminals.

S/N 2011821 & Above

Conveyor Switch

Check for continuity between switch

Refer to Page 45

terminals.

Speed Adjustment

This is a 0 to 5 K ohm, 10 turn

Potentiometer.

WITH POWER OFF: Remove the red, black

and white pot. leads from the motor control

board at terminalsP1, P2 and P3. With a

digital multimeter, check the ohm reading

across the red lead to the black lead. This

reading shouldbe 5 K ohms ± 5% as the pot is

rotated from low to high.Place the meter leads on

the redlead and on the white lead.Rotating the

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

should show an even transition from 0 to

5 K ohms ± 5%. There should be

no dead or open spots through out

the 10 turns of the pot.

Check all three leads to ground.

There should be no continuity to

ground. If any of the above checks

fail, replace the pot.

DC Motor Control Board

Check for 120 VAC input to the

control board at terminals L1 and

L2. If not present, check the

conveyor switch and wiring back to the

3 amp fuse and then back to the power

source if necessary. If 120 VAC is

present at L1 and L2, check the VDC

output at terminals A+ and A-. If a

DC voltage is not present, check the

4 amp and the 1 amp fuses on the

Impinger II - 1100 Series Service Manual - International