Lincoln Impringer Conveyor Oven 1200 Manuel d'utilisateur télécharger pdf (Page 35)

Impinger I -–1000 Series Service Manual - International

Tach generator and DC Motor

Control Board

With the power to the DC motor control board

turned off, remove the leads from terminals T1 and

T2. Place the test leads of a digital meter on the

tach leads, turn power on, and the meter reading

should be approximately 30 to 35 VDC. This

reading should be steady within ± 0.2 to 0.3 VDC. If

this reading is not within ± 0.5 VDC, place the test

meter probes on terminals A+ and A-. The meter

reading should be approximately 150 to 160 VDC

and steady within approximately 2 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 changing a board or tach. This test is not

always 100% accurate as this test is not performed

at operating speeds. However, this test is the best

method currently available. Readjustment should

always be attempted at least once before

replacement. See procedure for board adjustment

on page 65.

DC Gear motor If the DC control board is steady then the problem

may be the motor or gearbox. Check the brushes in

the motor for excessive arching and/or unusual

wear. Check the motor and gearbox from

instruction located on page 34 under "possible

cause" listing "Conveyor gear motor".

Conveyor will not run

S/N Q14974 & up1000

Series S/N Q14791 &

up 1200 Series

Voltage Supply Check incoming voltage supply at Line 1 to neutral.

There should be a voltage reading of 120 VAC.

Fan Switch See procedure for checking on page 26.

Conveyor Switch Check for 120 VAC to conveyor Switch. If no

voltage is present, trace wiring back to the fan

switch. WITH POWER OFF: Check continuity

between switch terminals.

Conveyor Fuse (3A) Check, replace if necessary.

Fuseholder Check, replace if necessary.

Conveyor Control (Stepper)

Transformer

Check for 120 VAC supply to primary of

transformer, if voltage is not present, trace wiring

back to the fuse holder. If voltage is present, check

for out-put voltage from the transformer secondary.

NOTE: this control transformer outputs (2)

secondary voltages Red Leads 29 VAC Brown

Leads 10 VAC. If BOTH secondary voltages are

not present, replace the transformer.

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 111 112

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Lincoln Impringer Conveyor Oven 1200 Manuel d'utilisateur Page 35

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