Lincoln 1100 Series ユーザーズマニュアル

Switch, Heat

With switch on, check for 120 VAC on both terminals

to neutral. Replace if defective.

Air Pressure Switch

This normally open switch should close when the

main fan is activated. Adjust if necessary (Refer to

Section D). Replace if defective.

Fuse, 3 Amp

Check, replace if necessary.

Fuseholder

Check, replace if necessary.

Temperature Control

Check for 120 VAC supply at terminal #11 to neutral

on temperature control. If no voltage is present, trace

wiring back to 3 amp fuse. Turn the temperature

adjustment knob to maximum temperature position

and check for 120 VAC at the load terminal (#9) and

neutral. If 120 VAC is present and unit is not heat

-ing, refer to “Mercury Contactor” for next check.

If 120 VAC is not present, proceed.

Thermocouple Probe

WITH POWER ON AND THERMOCOUPLE

LEADS ATTACHED TO THE TEMPERATURE

CONTROL BOARD: measure D. C. millivolt output of

these leads. Refer to thermocouple chart in Section

D for proper readings. If these readings are not

achieved, replace thermocouple.

Temperature Control

WITH POWER OFF: remove the

Potentiometer

potentiometer leads from the

temperature control board and measure ohms from

black to white leads. The reading should be from

approximately 0 to 2.5k ohms as the dial of the

potentiometer is turned throughout its full rotation.

From black to red leads, the reading should be

approximately 2.5k ohms (constant) throughout the

full rotation of the dial. If these readings are not

achieved, replace potentiometer. If the thermocouple

probe and the control potentiometer check good,

then the problem is usually with the temperature

control board.

Mercury Contactor

Check for 120 VAC to the contactor coil. If voltage is

present and contact will not activate, replace the

contactor.Also, check each contactor for proper

high voltage input and output.

Heater Elements

Check the Amp. draw on each hot leg for

proper load.

Check the specifications plate for rating

information.

If the Amp. draw is low or high, check

the individual elements for opens,

shorts, and proper resistance.

WITH POWER OFF: To check resistance

of the elements, remove all leads from

the elements and use an accurate digital

VOM. The element resistance should be

Impinger II - 1100 Series Service Manual - International