Sigma 1456, 1433-000-E, 1457, 1434-000-E service manual

Page 9

 

 

 

 

there is voltage to the pilot valve, but there is no gas

 

 

 

 

 

pressure, replace gas valve.

 

 

 

Pilot tube

 

Check for gas pressure at pilot tube. Disconnect pilot

 

 

 

 

 

tube at burner and connect manometer. If there is no

 

 

 

 

 

gas pressure, check for blockage in pilot tube. Repair or

 

 

 

 

 

replace as needed.

 

 

 

Pilot orifice

 

If there is gas pressure at the pilot tube, check the pilot

 

 

 

 

 

orifice for damage or obstructions. Replace pilot orifice

 

 

 

 

 

as needed.

 

 

Flame will not stay on

Flame sensor

 

To check flame sensor operation, connect a digital

 

 

 

 

 

multimeter (capable of measuring D.C. microamps)

 

 

 

 

 

between the flame sensor wire and the flame sensor

 

 

 

 

 

connection on the ignition control (terminal #13). Flame

 

 

 

 

 

sensor current is to be 0.7 microamps, minimum. If

 

 

 

 

 

these readings are not achieved, replace igniter/sensor

 

 

 

 

 

assembly. Also check for any type of damage to flame

 

 

 

 

 

sensor wire and connections.

 

 

 

 

 

NOTE: The D.C. microamp test must be conducted with

 

 

 

 

 

the oven in low flame (bypass) operation.

 

 

 

Power supply

 

Set the temperature to the lowest temperature setting. If

 

 

 

 

 

there is sufficient microamp current, but the flame will

 

 

 

 

 

not stay lit, check for proper polarity of the power supply.

 

 

 

Ignition control

 

If there is sufficient microamp current, and there is

 

 

 

 

 

proper polarity of the power supply, but the burner will

 

 

 

 

 

not stay lit, check the reset button for the ignition control.

 

 

 

 

 

If the above test is okay, replace the ignition control.

 

 

 

NOTE: Flame should be on at

 

 

 

 

 

this time

 

 

 

 

Low flame is on, but

Control transformer

 

Check for supply voltage to primary of control

 

 

no main flame

 

 

transformer. If no voltage is present, trace wiring back to

 

 

 

 

 

oven power switch. If voltage is present, check for

 

 

 

 

 

24VAC at transformer secondary. If there is primary

 

 

 

 

 

voltage, but no secondary voltage, replace control

 

 

 

 

 

transformer.

 

 

 

Oven control

 

Check for 24VAC supply to oven control. If no voltage is

 

 

 

 

 

present, trace wiring back to control transformer. Check

 

 

 

 

 

for supply voltage to oven control. If no voltage is

 

 

 

 

 

present, trace wiring back to ignition control. If voltage is

 

 

 

 

 

present, check for a read-out on the display. If there is

 

 

 

 

 

no read-out on the display, replace oven control. If there

 

 

 

 

 

is a read-out on the display, set the oven control to

 

 

 

 

 

maximum temperature (see installation operations

 

 

 

 

 

manual for temperature adjustment). With the oven

 

 

 

 

 

control at maximum temperature, check for supply

 

 

 

 

 

voltage to the temperature regulation valve. If there is

 

 

 

 

 

voltage at the temperature regulation valve, proceed to

 

 

 

 

 

“Temperature regulation valve “. If there is no voltage at

 

 

 

 

 

the temperature regulation valve, trace wiring back to

 

 

 

 

 

the oven control. If there is no voltage output at the oven

 

 

 

 

 

control, check the read-out on the oven control. If the

 

 

 

 

 

oven control reads “PROBE FAIL” this indicates that the

 

 

 

 

 

thermocouple has failed or become disconnected from

 

 

 

 

 

the oven control

 

 

 

Thermocouple

 

Check to see that the thermocouple is securely

 

 

 

 

 

connected to the oven control. If the thermocouple is

 

 

 

 

 

connected to the oven control, and the display indicates

 

 

 

 

 

“PROBE FAIL”, disconnect the thermocouple from the

 

 

 

 

 

oven control and measure the resistance of the

 

 

 

 

 

thermocouple. The thermocouple should read approx.

 

 

 

 

 

11Ω. If these readings are not achieved, replace the

 

 

 

 

 

thermocouple. If these readings are correct, proceed.

 

Impinger I – Adv Digital – Gas Service Manual – International

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Contents Impinger Conveyor Ovens Temperature Control Power SupplyNAT. GAS LP GASSchematic Diagram Serial Number N28654 to N31348 Serial Number N31349 and Above Symptom Possible Cause Evaluation With Power OFF Remove 3 prong plug on gas Not stay on, check the reset button for the ignition Page Belt JAM With Power on and ThermocoupleSensor sensor is located in the conveyor motor CAPACITOR, Motor Replacement FAN, Main ReplacementCooling FAN, Control BOX Replacement Impinger Advantage SeriesBurner Blower Motor Replacement THERMOSTAT, Cooling FAN ReplacementTo Remove the Blower Wheel for Periodic Cleaning Burner AssemblySWITCH, Burner Reset Replacement Temperature Regulation Valve ReplacementBurner Ignitor Replacement THERMOSTAT, Oven Cavity HI-LIMIT ReplacementBurner Alarm Replacement Spark Generator ReplacementControl Transformer Replacement Thermocouple Measurment Temperature Millvolts ApproxConveyor Drive Motor Replacement CAPACITOR, Conveyor Motor ReplacementON-OFF Switch Replacement Pilot Orifice ReplacementOven Control Replacement Fuse Holder ReplacementLetter Part Number Description General View Advantage SeriesPage 1456,1457,1433-000-E, 1434-000-E Control BOXPage GAS and Electric Oven BackPage Conveyor 1450 Series Page This page intentionally left blank This page intentionally left blank

1434-000-E, 1457, 1456, 1433-000-E specifications

The Sigma 1457, 1433-000-E, 1434-000-E, and 1456 are advanced technological products renowned for their integration in various industries, showcasing a blend of innovation, efficiency, and reliability. Each model boasts distinct features designed to enhance performance, making them essential tools for professionals across various sectors.

The Sigma 1457 is equipped with state-of-the-art sensory technologies that enable accurate and quick data collection. Its advanced algorithms process complex information rapidly, ensuring users receive real-time feedback. This model is particularly suited for applications requiring precision, such as environmental monitoring and industrial automation. The interface is user-friendly, allowing easy navigation and configuration, while the robust build ensures longevity even in harsh conditions.

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In conclusion, the Sigma 1457, 1433-000-E, 1434-000-E, and 1456 embody the pinnacle of technological advancement, offering tailored features and solutions for professional applications. Each model is designed to meet the diverse needs of users while ensuring reliability and efficiency, making them invaluable assets in their respective fields.
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