Lincoln 1100 Series Manuel D’Utilisation

display. If the readings do not match, replace

thermocouple probe.

Power Supply

If 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 can be caused by a voltage spike or

surge in the incoming power lines. To eliminate

this condition remove power from the time/temp.

display by shutting off the main fan

switch for 15 seconds, or if display stays on,

(older models) circuit breaker interruption may be

required. This should eliminate the problem. If

the problem continues, jumper the two

fuses in

the red wires leading from the 12.6 VAC trans-
former to the display on older units.
If this does not solve the problem,

it may be coming in through the

commercial power lines. Suggest

that customer contact his power

company for evaluation.

Temp Display

Perform the power supply check,

inaccurate, erratic,

the thermistor probe check, and

or inoperative

then perform the time/temp

simulator test. Refer to Section D for

instructions. Remember, when

using the time/temp simulator,

remove all the leads from the

back of the display except the 3

power leads. After completion of

this test and if reinstalling display back

into the oven, the dip switches

must be reset for oven operation.

S/N 2011821 &

Time Display

Perform all checks as in the above

Above, See Pg. 45

inaccurate, erratic,

evaluation. If the time check is

or inoperative

okay, refer to the next section -

optical encoder.

Optical Encoder

The above time/temp test should

have already been performed.

Remove the dust cover from the

gearmotor and inspect the coupling

and encoder disc. The coupling set

screws should be tight and not

slipping on the motor shaft or the

tach. generator shaft. The encoder

disc should be firmly attached to

the coupling and not warped. Check

the positioning of the optical

encoder disc. The disc should not

be touching the optical encoder

assembly and the encoder assembly

should be mounted so it is squarely

facing the coupling shaft. This is

to allow the infrared light beams to be

broken by the encoder disc.

If all this is okay, then replace the

optical encoder assembly.

Impinger II - 1100 Series Service Manual - International