Sigma 1433-000-E, 1456, 1457, 1434-000-E Not stay on, check the reset button for the ignition

Page 8

 

 

not stay on, check the reset button for the ignition

 

 

control. If the above check okay, replace ignition control.

Oven will not heat

Main fan

If not operating, refer to “Oven fan will not run”

S/N N31349 and

 

 

Above

 

 

 

Gas supply

Check for adequate gas supply and be sure that the

 

 

manual gas shut off valve is open. Also check flexible

 

 

gas line connection..

 

Air pressure switch

Check air switch terminals for supply voltage to

 

 

terminals COM and NO. If voltage is present on one side

 

 

only, check for air tube blockage or misalignment. If

 

 

these are okay, adjust air pressure switch or replace

 

 

switch as needed.

 

Oven cavity hi-limit

Terminals are normally closed, opens at 350°C (660°F).

 

thermostat

If open, reset and test oven for proper operation. If

 

 

thermostat will not hold for maximum temperature, and

 

 

oven is not exceeding control setting, check for proper

 

 

location of the capillary bulb in its spring holder. If above

 

 

checks are okay, replace hi-limit thermostat.

 

Ignition control

Check for supply voltage to ignition control at terminal

 

 

#1 and neutral. If no voltage is present, trace wiring back

 

 

to hi-limit thermostat. If voltage is present, check for

 

 

supply voltage to burner blower motor at terminal #8 and

 

 

neutral. If no voltage is present, wait 30 seconds, reset

 

 

ignition control, and re- try. If the above fails, replace

 

 

ignition control.

 

Burner reset switch

Switch is normally open. Check to see that the switch

 

 

closes when reset button is pushed. Replace as needed.

 

Burner blower motor

Check for supply voltage to burner blower motor. If no

 

 

voltage is present, trace wiring back to the ignition

 

 

control.

 

 

WITH POWER OFF: Turn blower wheel to check for

 

 

locked rotor.

 

 

If supply voltage is present and motor does not run,

 

 

replace burner blower motor.

 

Burner blower motor air

Check for air pressure switch to be switching from “NC”

 

pressure switch

to “NO”. Check for air tube blockage or misalignment.

 

 

Adjust air pressure switch. If the above fails, replace air

 

 

pressure switch.

 

Ignition control

A pre-purge time of 30 to 60 seconds occurs after

 

 

burner blower motor starts. Check for high voltage spark

 

 

output from the ignition control. If there is no high

 

 

voltage spark output, check reset button for the ignition

 

 

control. If there is still no high voltage output, replace the

 

 

ignition control.

 

Igniter/sensor assembly

Check for visible damage to the igniter/sensor assembly.

 

 

If there is visible damage to the igniter/sensor assembly,

 

 

replace. If there is no visible damage to the components,

 

 

and no spark, replace the igniter/sensor assy. Also

 

 

check for frayed or damaged wires in burner tube.

 

 

Replace components as needed.

 

Ignition control

Gas valve should open as the ignition control generates

 

 

the high voltage spark. Check for supply voltage to pilot

 

 

valve at terminal #5 and neutral. If no voltage is present,

 

 

check reset button for the ignition control. If there is still

 

 

no voltage to the pilot valve, replace ignition control.

 

Gas valve

Check for supply voltage to pilot valve terminal #5 to

 

 

neutral, if there is no voltage, trace wiring back to

 

 

ignition control. If there is supply voltage, connect a

 

 

manometer to the pressure tap fitting on the gas valve. If

8

Impinger I – Adv Digital – Gas Service Manual – International

Page 7 Page 9
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Page 7 Page 9
Contents Impinger Conveyor Ovens Power Supply Temperature ControlNAT. 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 With Power on and Thermocouple Belt JAMSensor sensor is located in the conveyor motor FAN, Main Replacement CAPACITOR, Motor ReplacementCooling FAN, Control BOX Replacement Impinger Advantage SeriesTHERMOSTAT, Cooling FAN Replacement Burner Blower Motor ReplacementTo Remove the Blower Wheel for Periodic Cleaning Burner AssemblyTemperature Regulation Valve Replacement SWITCH, Burner Reset ReplacementTHERMOSTAT, Oven Cavity HI-LIMIT Replacement Burner Ignitor ReplacementBurner Alarm Replacement Spark Generator ReplacementThermocouple Measurment Temperature Millvolts Approx Control Transformer ReplacementConveyor Drive Motor Replacement CAPACITOR, Conveyor Motor ReplacementPilot Orifice Replacement ON-OFF Switch ReplacementOven Control Replacement Fuse Holder ReplacementGeneral View Advantage Series Letter Part Number DescriptionPage Control BOX 1456,1457,1433-000-E, 1434-000-EPage Oven Back GAS and ElectricPage 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.

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