Lincoln 1100 Series Manuel D’Utilisation

control board. If 120 VAC is present at terminals

L1 and L2, but DC Voltage is not present

at A+ and A-, providing the fuses are good,

replace the board. If DC voltage is present at A+

and A-, but motor does not run, check gear

motor as follows.

Conveyor Gear Motor

If DC voltage is present at A+ and A-and the

motor does not run, first check the mini breaker

and then theconveyor. As described below under

conveyor.Check the leads to the motor for

evidence of any shorts or opens, and each lead

to ground. Check motor brushes. Replace

as needed. If themotor fails the above tests,
replace motor. Remove the dust cover

from the

top of the motor and rotate motor shaft to deter

mine if there is a locked rotor or a locked

gear box (use care so encoder disc

is not damaged).

Conveyor

Check for any mechanical mis- alignment or i
improper adjustment.

Also check for worn

bearings. TheInstallation and Operations Manual

shows proper conveyor belt position. A conveyor

belt that is too tight will contribute to excessive

load, bearing wear, and wearing of slider bed

rods.

Conveyor speed varying

Power Supply

Check power supply at the DC

or intermittent

control board for the 120 VAC ±

10% at board terminals L1 and L2.If voltage is

not present, trace wiring back to the power input,

chck the main circuit breakers and call

S/N2011821& above

the power company if necessary.

Refer to page 45

Tach. generator and DC

With the power to the DC motor

Motor Control Board

control board turned off, remove

the leads from terminals T1 and T2.Place the

test leads of a digital test meter on the tach.

leads, turn power on, and the meter reading

should be approximately 20 to 25 VDC. This

reading is normally steady within ±

0.2 to 0.3 VDC.

If this reading is not within required VDC,

place the test meter probes on terminals A+

and A-. The meter reading should be ap

proximately 150 to 160 VDC and steady

within approximately 2 to 3 VDC. If the tach.

voltage is unsteady, and the board

output is steady, check the coupling for loose

set screws or any type of damage. If the

coupling checks good, the tach. is usually

bad. If the board voltage output is unsteady

beyond limits, then the board is probably

bad. Always check the speed pot. Be sure it

is okay before

Impinger II - 1100 Series Service Manual - International