Lincoln 1100 Series Flame will not stay on, Flame Sensor, Power Supply Ignition Control

Page 29

Flame will not stay on

Flame Sensor

Power Supply

Ignition Control

Pilot lamp is on, but	Temperature Control
no main flame

Thermocouple Probe

Temperature Control

Potentiometer

Impinger II - 1100 Series Service Manual - International

To check for flame sensor operation, connect a digital multimeter (capable of measuring D.C. micro amps) between the flame sensor wire and terminal “F” on the Honeywell Ignition Control or terminal 1 on Landis & Gyr Ignition Control. Sensor current from Honeywell is 2 to 4 D.C. micro amps. Sensor current from Landis & Gyr is 3 micro amps minimum.

If these readings are not achieved replace ignitor/sensor assembly. Also check for any type of damage to flame sensor wire and connections. NOTE: The D.C. micro amp test must be conducted with the oven in low flame (bypass) operation.

Turn the temperature control to the lowest setting. If there is sufficient micro-amp current, but the flame will not stay lit, check

for proper polarity of the power supply If there is sufficient flame sensor current, but the burner will not remain ignited, check the reset button on ignition control. If all above are okay, replace ignition control.

Check for 120 VAC across terminals 10 and 11 on temperature control board. If no voltage is present, check wiring back to the Main Fan Switch. Turn the temperature adjustment knob to the maximum temperature position and check for 120 VAC at the load terminal (number 9), and neutral (number 10).

If 120 VAC is present and unit is not heating, refer to “Solenoid Valve” for next check. If 120 VAC is not present, proceed with next step.

With power on and thermocouple leads attached to board, measure the millivolt output of these leads. Refer to the thermocouple chart in Section D for proper readings.

WITH POWER OFF: Remove the potentiometer leads from the temperature control board and measure ohms from black to whiteleads. The reading should be from approximately 0 to 2.5K ohms as the dial of the potentiometer is turned through its full rotation. From black to red leads, the reading should be approx.2.5K ohms and remain steady throughout the full rotation of the potentiometer.

If the thermocouple probe and the control potentiometer check good,

29

Image 29

Contents IMPINGER CONVEYOR OVENS SERVICE MANUALMODEL 1100 SERIES INTERNATIONALTABLE OF CONTENTS SEQUENCE OF OPERATIONS 1104 thru the display into a temperature reading SEQUENCE OF OPERATION 1134 - 1135 - 1136 - S/N 2011383 and above SEQUENCE OF OPERATIONS 2011383 and above SEQUENCE OF OPERATIONS 1152 thru intervals to maintain desired temperature by the display into a temperature reading temperature readingSCHEMATIC SCHEMATIC SCHEMATIC 1134, 1135, 1150, S/N 2011383 AND BELOW SCHEMATIC 1134, 1135 S/N 2011383 AND ABOVE SCHEMATIC 1150 S/N 2011383 AND ABOVE SCHEMATIC 1136, S/N 2011383 AND BELOW SCHEMATIC 1136, S/N 2011383 AND ABOVE SCHEMATIC 1151 S/N 2011383 AND BELOW SCHEMATIC 1151 S/N 2011383 AND ABOVE SCHEMATIC1152 THRU 1158 S/N 2011383 AND BELOW SCHEMATIC1152 THRU 1158 S/N 2011383 AND ABOVE SCHEMATIC1152 AND 1153 S/N 2011821 AND ABOVE SCHEMATIC 1154 THRU 1158 S/N 2011821 AND ABOVE MODELS 1152 - 1153 - 1154 - 1155 - 1156 TROUBLE SHOOTING GUIDE GAS OVENSNo main fan cool down switch. If switch is closed and voltage Burner Switchpresent on one side only, replace switch Gas Pressure SwitchCheck for proper line voltage to Flame will not stay on Power Supply Ignition ControlFlame Sensor Pilot lamp is on, butthen the problem is usually with thetemperature bearings. TheInstallation and Operations Manual improper adjustment. Also check for wornPower Supply Check power supply at the DCDC Gearmotor this condition remove power from the time/temp surge in the incoming power lines. To eliminateswitch for 15 seconds, or if display stays on required. This should eliminate the problem. IfTROUBLE SHOOTING GUIDE ELECTRIC OVENS Air Pressure Switch Switch, HeatThis normally open switch should close when the adjustment knob to maximum temperature positionas follows MODEL Main fan runs after maintenance. Also, most of the problems WITH POWER OFF: To check resistance of thefor proper readings. If these readings are not achieved, replace thermocoupleConveyor will not run MODEL 1151 200 VAC THREE PHASE 60 HZ TROUBLESHOOTING GUIDE ELECTRIC OVENRelay, Main Fan Conveyor will not run S/N 2011383 and above Mercury Contactor Heater ElementsREFER TO PAGE REFER TO PAGE REFER TO PAGE REFER TO PAGE REFER TO PAGE 43STEPPER MOTOR DRIVE Conveyor will not run yellow wires, thermo 12 VAC Power Supplyred wire and 1 white wire Thermocouple Probe Power Supplyexperienced, such as a rolling of IMPINGER II CONVEYOR OVEN REMOVAL, INSTALLATION, AND ADJUSTMENTRELAY, DPST 1.Shut off power at main breaker TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING This is part of the burner blower motor assemblyMOTOR, BURNER BLOWER TO REMOVE BLOWER MOTORAIR PRESSURE SWITCH Page Page SOLENOID VALVE 1.Shut off power at main breaker 1.Shut off power at the main breaker5.Loosen pipe union in piping assembly HEATING ELEMENTS 1.Shut off power at main breakerIGNITION CONTROL 1.Shut off power at main breaker 2.Shut off gas at main line to the oven ORIFICE, MAIN BURNER4.Remove control compartment covers 5.Loosen 4 nuts holding manifold to burner capLAMP, PILOT BURNER LENS, PILOT LAMP 1.Remove gearmotor assembly see “GEARMOTOR” Above OPTICAL ENCODER ASSEMBLY7.To adjust optical encoder TACH. GENERATOR 1.Turn off power at main breakerD C MOTOR CONTROL BOARD 4.Reverse wires fastened to terminals A+ and A 1.Turn off power and remove conveyor5.Reverse wires fastened to terminals T1 and T2 1.Turn off power 2.Remove conveyorTRANSFORMER, TIME/TEMP. DISPLAY MODEL 1100 SERIES OVENS OHMS SWITCH, DISPLAY, SETOVEN TEMPERATURE SWITCH, ON/OFF TRANSFORMER, STEP DOWN/120 VAC DIP SWITCHES FOR 50 SEC. TO 30 MIN. TIMES maximum speed potrefer HALL EFFECT SENSOR - REPLACEMENT AIR PRESSURE SWITCH, BURNER OR OVEN CAVITY 4.Remove conveyor gear motor BURNER ALARM - REPLACEMENT8.Remove top control compartment brace 10.Assemble in reverse orderDESCRIPTION GENERAL –1100SERIESLETTER GENERAL 1100 SERIES BLOW UP 1136,1150,1151,1160 Thru1163 Page MODELS 1152 THRU CONTROL COMPARTMENT - FRONTLETTER DESCRIPTIONCONTROL COMPARTMENT – FRONT 1152-1158BLOW UP DESCRIPTION CONTROL COMPARTMENT – REARLETTER CONTROL COMPARTMENT - REAR BLOW UP MODELS AND ABOVE MODELS 1160-1163S/N 2011978 AND ABOVE CONTROL COMPARTMENT – REAR BLOW UPMODELS 1130-1136,1150,1151S/N 2011383 AND ABOVE DESCRIPTION CONTROL COMPARTMENT – REARLETTER Page MODELS 1152 THRU 1158 S/N 2011821 AND ABOVE CONTROL COMPARTMENT – REARLETTER DESCRIPTIONPage OVEN BACK ASSEMBLY – 1100 SERIES OVEN BACK ASSEMBLY – 1100 SERIES BLOW UP GEARMOTOR ASSEMBLY – 1100 SERIES GEARMOTOR ASSEMBLY – 1100 SERIES BLOW UP CONVEYOR/DOOR – 1100 SERIES CONVEYOR/DOOR – 1100 SERIES BLOW UP This page intentionally left blank This page intentionally left blank