Lincoln Impringer Conveyor Oven 1200 Manuel d'utilisateur télécharger pdf (Page 34)

Impinger I -–1000 Series Service Manual - International

Speed Adjustment

Potentiometer

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 terminals

P1,P2, and P3. With a digital multimeter, check the

ohm reading across the red lead (P3) to the black

lead (P1). This reading should be 5 K ohms ± 5%

as the pot is rotated from low to high. Place the

meter leads on the red lead (P3) and on the white

lead (P2). 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 3 amp fuse and

then back to 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

control board. If 120 VAC is present at terminals L1

and L2, but DC voltage is not present at A+ and A-,

providing the 1 amp and 4 amp 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

the conveyor. Refer to the next possible cause.

Check the leads to the motor for evidence of any

shorts or opens, and each lead to ground. If the

motor fails the above tests, replace motor. Remove

dust cover from the top of the motor and rotate

motor shaft to determine if there is a locked rotor or

a locked gear box (use care so encoder disc is not

damaged).

Conveyor Check for any mechanical miss-alignment or

improper adjustment. Also check for worn bearings.

The Installation and Operations Manual shows

proper conveyor belt adjustment. A conveyor belt

that is over tightened will cause excessive bearing

wear and sometimes, irregular speed.

Conveyor speed

varying or intermittent

Power Supply Check power supply at the DC control board for the

120 VAC at board terminals L1 and L2. If voltage is

not present, check main circuit breakers.

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 111 112

Commentaires sur ces manuels

Pas de commentaire

Lincoln Impringer Conveyor Oven 1200 Manuel d'utilisateur Page 34

Commentaires sur ces manuels

Produits connexes et manuels pour Fours à convection Lincoln Impringer Conveyor Oven 1200