Main Flame will not

Flame Monitor

(There should be a visible main flame at this time.)

stay lit

 

To check for flame monitor operation, connect a

 

 

digital volt meter (capable of measuring D.C. micro

 

 

amperes) between the flame sensor and terminal

 

 

#15 on the flame monitor. The flame monitor

 

 

requires a minimum of 4 micro amp. D.C. for proof

 

 

of flame. If these readings are not achieved,

 

 

replace sensor assembly. Also check for any type

 

 

of damage to flame sensor wire and connections.

 

 

If the reading is above the minimum required, and

 

 

the flame monitor will not supply 220 VAC to the

 

 

relay coil, replace the flame monitor.

Intermittent Heating

As Follows

Both the main fan motor and burner blower motor

 

 

are equipped with thermal protection and will cease

 

 

to operate if overheating occurs. This can cause

 

 

the units to cycle on and of intermittently. This may

 

 

be caused by improper ventilation. Also, most of

 

 

the problems listed under "oven will not heat" can

 

 

cause intermittent failure.

Conveyor will not run

Conveyor Switch

Check for 120 VAC to conveyor switch. If no

 

 

voltage is present, trace wiring back to the power

 

 

supply. WITH POWER OFF: Check continuity

 

 

between switch terminals

 

Conveyor Fuse(3A)

Check, replace if necessary.

 

Fuseholder

Check, replace if necessary.

 

Conveyor Control

Check for 120 VAC supply to primary (Stepper)

 

 

Transformer of transformer, if voltage is not

 

 

present, trace wiring back to the fuseholder. If

 

 

voltage is present, check for output 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.

 

Speed Adjustment

This is a 0 to 50K ohm, 10 turn potentiometer.

 

Potentiometer

WITH POWER OFF: remove the 3 pin

 

 

potentiometer cable plug from the motor control

 

 

board. With a digital multimeter, check the ohm

 

 

reading across the red lead to the black lead, this

 

 

reading should be 50K ohms ± 5% as the

 

 

potentiometer is rotated through its 10 turn rotation.

 

 

Place the meter leads on the red lead and white

 

 

lead. Rotating the potentiometer slowly, from low to

 

 

high, the meter should show an even transition

 

 

from 0 to 50K ohms ± 5% through the 10 turn

 

 

rotation of the potentiometer. There should be no

 

 

dead or open spots through the 10 turns of the

 

 

potentiometer. Check all three leads to ground.

 

 

There should be no continuity to ground. If any of

 

 

the above checks fail, replace the potentiometer.

 

Conveyor Motor(Stepper)

NOTE: if the conveyor drive motor becomes

 

Control

jammed or begins to run at an uncontrolled speed,

 

 

the conveyor motor will stop running. To reset, turn

 

 

off the conveyor switch, wait 30 seconds, turn the

 

 

conveyor switch on. If the motor does not run after

 

 

attempting re-set, check for 2 to 29 VAC across the

 

 

motor terminals 1 to 2 and 3 to 5 on, the conveyor

 

 

motor control. If voltage is not present at both sets

 

 

of terminals, replace control.

50

Impinger I -–1000 Series Service Manual - International

Page 49 Page 51
Page 50
Image 50
Lincoln Series 1000, Series 1200 service manual
Page 49 Page 51

Series 1000, Series 1200 specifications

The Lincoln Series 1200 and Series 1000 are two distinguished models in the range of Lincoln Electric welding machines, epitomizing quality, versatility, and advanced technology for both industrial and residential welding applications.

The Lincoln Series 1200 is renowned for its robust build and high-performance capabilities. One of its main features is the ability to perform both MIG (Metal Inert Gas) and stick welding processes, making it a versatile option for various welding requirements. It incorporates an intuitive control panel that allows for easy settings adjustments, ensuring operators can swiftly adapt to different materials and thicknesses. The Series 1200 is equipped with a powerful drive system to provide smooth wire feeding, minimizing downtime due to jams or misfeeds. Additionally, its high-duty cycle support allows continuous operation, making it an ideal choice for professional welders and fabrication shops.

In terms of technology, the Series 1200 employs advanced inverter technology that enhances energy efficiency while reducing the machine’s overall weight. This results in portability without compromising power, making it a practical choice for on-site tasks. Moreover, the machine features an automatic voltage adjustment that optimizes performance based on the input voltage, ensuring reliable operation even under fluctuating power conditions.

On the other hand, the Lincoln Series 1000 is specifically designed for entry-level users and small projects. It shines with its user-friendly interface, which simplifies the welding process for beginners. This model typically includes pre-set parameters and an easy-to-read display, enabling novice operators to achieve excellent welds with minimal experience. Despite its entry-level focus, the Series 1000 does not skimp on performance, offering dependable results across various materials.

Both the Series 1200 and Series 1000 incorporate safety features, including thermal overload protection, ensuring that users can operate the machines with peace of mind. Their durable construction allows for prolonged use in tough work environments without sacrificing reliability.

In conclusion, the Lincoln Series 1200 and Series 1000 cater to a wide range of welding needs, from professional applications to home projects. Their respective features and technologies present options that can fit various skill levels while delivering exceptional welding performance and longevity. Whether you are a seasoned professional or a hobbyist, Lincoln Electric provides reliable solutions to meet your welding requirements.
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