Lincoln 1100 Series service manual Main fan runs after

Page 38

Main fan runs after

Oven Start Relay

Contacts should open when main fan

20 minute cool down

 

switch is turned off.

 

20 Minute Time Delay

120 VAC at terminal #2 should discontinue approxi

 

 

mately 20 minutes after main fan is switched off. If

 

 

the oven start relay contacts are open, and

 

 

the voltage continues at terminal #2 of the 20 minute

 

 

timer, for more than 20 mins., replace the timer.

 

Oven Fan Relay

Check to insure that the contacts are opening after

 

 

the coil is de-energized.

 

20 Minute Time Delay

NOTE: ON/OFF operation of the fan switch

 

 

will set the timer to 20 minutes. If the

 

 

timer is accidentally reset, turn off main breaker for

 

 

15 seconds to cancel.

No control box cooling

 

Check for main fan operation. If not operating, refer

to “Oven Fan Will Not Run”.

Oven Start Relay

Check relay contacts. 120 VAC

 

 

should be present.

 

Cooling Fan Motor(s)

120 VAC should be present at the fan

 

 

motor. If voltage is present, check for opens or

 

 

shorts.

 

 

WITH POWER OFF: Check for locked rotor of the

 

 

fan motor.

No automatic control

Thermostat, Cooling

Check the cooling fan thermostat. box cooling

Fan

 

(Thermostat closes at 120°F and opens at 100°F.)

 

 

With the cooling fan thermostat pre-heated, check for

 

 

continuity. If switch is open, replace.

 

Cooling Fan Motor(s)

120 VAC should be present at the fan motor. If

 

 

voltage is present, check foropens or shorts.

 

 

WITH POWER OFF: Check for locked

 

 

rotor of the fan motor.

Control box cooling fan

Thermostat, Cooling

This normally open thermostat should

continues to run

Fan

close at 120°F (48.9°C) and reopen at

 

 

100°F (37.8°C).

Oven will not heat

Main Fan Motor

Check for main fan operation. If it is not

 

 

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

 

Heat Switch

With switch on, check for 120 VAC on

 

both terminals to neutral.

Replace if defective.

 

Air Pressure Switch

This normally open switch should close

 

 

when the main fan is activated. Adjust if

 

 

necessary (Refer to Section D).

 

 

Replace if defective.

 

Fuse, 3 Amp

Check, replace if necessary.

 

Fuseholder

Check, replace if necessary.

 

Temperature Control

Check for 120 VAC supply at

 

 

terminal #11 to neutral on temperature

 

 

control. If no voltage is present, trace

 

 

wiring back to 3 amp fuse. Turn the

 

 

temperature adjustment knob to

 

 

maximum temperature position and

 

 

check for 120 VAC at the load terminal

 

 

(#9) and neutral. If 120 VAC is

 

 

present and unit is not heating, refer

 

 

to “Mercury Contactor” for next check.

 

 

If 120 VAC is not present, proceed.

 

Thermocouple Probe

WITH POWER ON AND THERMOCOUPLE

 

 

LEADS ATTACHED TO THE TEMPERATURE

 

 

CONTROL BOARD: measure D. C.

38

 

Impinger II - 1100 Series Service Manual - International

Page 37 Page 39
Image 38
Page 37 Page 39
Contents MODEL 1100 SERIES SERVICE MANUALIMPINGER CONVEYOR OVENS 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 temperature reading by the display into a 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 TROUBLE SHOOTING GUIDE GAS OVENS MODELS 1152 - 1153 - 1154 - 1155 - 1156No main fan cool down present on one side only, replace switch Burner Switchswitch. If switch is closed and voltage Gas Pressure SwitchCheck for proper line voltage to Flame Sensor Power Supply Ignition ControlFlame will not stay on Pilot lamp is on, butthen the problem is usually with thetemperature Power Supply improper adjustment. Also check for wornbearings. TheInstallation and Operations Manual Check power supply at the DCDC Gearmotor switch for 15 seconds, or if display stays on surge in the incoming power lines. To eliminatethis condition remove power from the time/temp required. This should eliminate the problem. IfTROUBLE SHOOTING GUIDE ELECTRIC OVENS This normally open switch should close when the Switch, HeatAir Pressure Switch adjustment knob to maximum temperature positionas follows MODEL Main fan runs after for proper readings. If these readings WITH POWER OFF: To check resistance of themaintenance. Also, most of the problems are not achieved, replace thermocoupleConveyor will not run TROUBLESHOOTING GUIDE ELECTRIC OVEN MODEL 1151 200 VAC THREE PHASE 60 HZRelay, Main Fan REFER TO PAGE REFER TO PAGE REFER TO PAGE Mercury Contactor Heater ElementsConveyor will not run S/N 2011383 and above REFER TO PAGE REFER TO PAGE 43STEPPER MOTOR DRIVE Conveyor will not run red wire and 1 white wire 12 VAC Power Supplyyellow wires, thermo Thermocouple Probe Power Supplyexperienced, such as a rolling of REMOVAL, INSTALLATION, AND ADJUSTMENT IMPINGER II CONVEYOR OVENRELAY, DPST 1.Shut off power at main breaker MOTOR, BURNER BLOWER This is part of the burner blower motor assemblyTO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING TO REMOVE BLOWER MOTORAIR PRESSURE SWITCH Page Page 5.Loosen pipe union in piping assembly 1.Shut off power at the main breakerSOLENOID VALVE 1.Shut off power at main breaker HEATING ELEMENTS 1.Shut off power at main breakerIGNITION CONTROL 1.Shut off power at main breaker 4.Remove control compartment covers ORIFICE, MAIN BURNER2.Shut off gas at main line to the oven 5.Loosen 4 nuts holding manifold to burner capLAMP, PILOT BURNER LENS, PILOT LAMP 7.To adjust optical encoder OPTICAL ENCODER ASSEMBLY1.Remove gearmotor assembly see “GEARMOTOR” Above TACH. GENERATOR 1.Turn off power at main breakerD C MOTOR CONTROL BOARD 5.Reverse wires fastened to terminals T1 and T2 1.Turn off power and remove conveyor4.Reverse wires fastened to terminals A+ and A 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 8.Remove top control compartment brace BURNER ALARM - REPLACEMENT4.Remove conveyor gear motor 10.Assemble in reverse orderDESCRIPTION GENERAL –1100SERIESLETTER GENERAL 1100 SERIES BLOW UP 1136,1150,1151,1160 Thru1163 Page LETTER CONTROL COMPARTMENT - FRONTMODELS 1152 THRU 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 LETTER CONTROL COMPARTMENT – REARMODELS 1152 THRU 1158 S/N 2011821 AND ABOVE 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
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