Lincoln Dual Technology Finisher 1922 User's Manual
Contents
1. 1804 som 4 tay o 9 o 240 L JUMPER TO 240V 121 121 NOD f 61 01 1 I If 080089 06 934 013105 134 0 dO Aye 2 It 1 002 1189 NO 2 OL JYIM A802 NO r2 OL pZ 3UIM ADKC 21 AJILA NO 1 3191 25 2 IS 1081802 u3HHOJSNYUI 9 08 AV130 11017 H9IH NJAO 1VISONN3HI 14 1 3140020Wu 3H1 ONISH3A3H HOLIMS YJLYJH QIYVYINT HOLIMS NIVR HOLIMS NIVR AY133 831V3H 03UVHINI AV138 01 11 21 S S IS eu 301 1HOlU YJLVIH AV138 18 YOAJANOD YOLOW 2N YOLOW IN M 0001 931V3H 1 9 91081802 HOLOW 3504 4 13 NJAO 1081802 NOD YOLOW YOAZANOD YOLIDVdYD 22 NIYN 3011232 12 M 0001 NIVW u31V3H J V yyy 083 301 1331 1 21 11 DTF 1920 Series Service Manual TROUBLESHOOTING GUIDE 1921 208 60 HZ 3 PHASE 1922 240 60 HZ 3 PHASE SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming power supply Check circuit breakers Reset if required Call power co if needed Fuses 10 Amp motor and Check replace if necessary controls Fuse h2. Shut off power at main breaker Remove conveyor and finger assemblies from oven see installation operations manual Remove front plenum assembly Measure location of main fan on motor shaft for reassembly Loosen two set screws and remove main fan from motor shaft Remove oven top and rear cover Disconnect wiring from motor Remove motor and motor mount assembly from back of oven Measure proper location of cooling fan on motor shaft for reassembly Remove cooling fan Remove motor from motor mount Reassemble in reverse order and test for proper operation MAIN FAN REPLACEMENT See MOTOR MAIN FAN above SWITCH ON OFF SWITCH STANDBY REPLACEMENT Shut off power at main breaker Remove control box top Depress clips on sides of switch and remove switch from front panel Disconnect all wires from switch Mark all wires for reinstallation Reassemble in reverse order and check system operation RELAY TIME DELAY REPLACEMENT o s Shut off power at main breaker Remove rear cover Remove wires from time delay relay and mark wires for reinstallation Remove mounting screw and remove time delay relay Reassemble in reverse order and check system operation RELAY MAIN FAN REPLACEMENT ass Shut off power at main breaker Remove rear cover Remove wires from main fan relay and mark wires for reassembly Remove mounting screws and remove main fan relay Reassemble in re
3. 3059 Frame conveyor D 130449 Belt conveyor 370480 JBracketconveyorbearnng 370481 Flangedbearing conveyor 3042 H 3915 Drive sprocket 5 1 369952 Connecting link conveyor three required J 3043 Shaft drive 0 35 K 3941 L 30501 Sprocket drive Oovendnvechan Not shown 1 assembly compete IIO lt O _ Not shown DTF 1920 Series Service Manual 23 24 Lincoln _ M CERTIFIED SERVICE AND PARTS nc DTF 1920 Series Service Manual
4. DU P ALISS Poo NOILVYNSIINOD S IS SET FREQUENCY JUMPER TO 60 HZ JUMPER TQ 240V 120 lel eo ov lt gt lt gt gt gt 50 uzlolejeje 01 L f LA 121 z if wr RED 0131 0 gi LI 94 134 0 2 138 L 7 Ape lt AS g 13 Ton 9 LIOA 802 0p2 YINYOJOLNY ZYX 1041802 YSWYOISNVYL 18X 9 0 1 130 INIL LIWIT HOIH NJAO 1VISONU3HI 3441 31dn020NU3HL ONISYJAJY YOAFANOD HOLIMS 8J1V3H HOLIAS NIVA HOLIAS AV139 39V83jNl AVII 431V3H NIVN AV139 01 11 21 S 25 IS eu UVIY 3015 LHOIY 4043ANOD YOLOW NIVA YOLOW IW 0001 Q3UVHUJNI 1 9 STOULNOD 3 30101 ISNA 23 14 NJAO 1081802 NOD IN 8 1102812 2827182 YOLON YOAFANOD 40112 4 9 29 HOLIOVdVO 19 HOLIMS 328055384 SdV M 000 u31V3H 4 301 1331 DTF 1920 Series Service Manual SCHEMATIC DIAGRAM MODEL 1921 1922 S N 8001208 and Above 11879082 SET FREQUENCY JUMPER TO 60 HZ SET MOTOR VOLTAGE YJHSINIJ 319
5. and check system operation Ve ee TRANSFORMER CONTROL REPLACEMENT Shut off power at main breaker Remove rear cover Remove wires from control transformer and mark wires for reassembly Remove mounting screws and remove control transformer Reassemble in reverse order and check system operation 1920 Series Service Manual 11 CAPACITOR CONVEYOR MOTOR REPLACEMENT 1 2 3 4 S 6 Shut off power at main breaker Remove control box top Remove tube from air pressure switch Remove wiring from air pressure switch and conveyor motor capacitor and mark all wires for reassembly Remove two screws and remove air pressure switch capacitor mounting bracket Remove capacitor from mounting bracket Reassemble in reverse order and check system operation CONVEYOR MOTOR REPLACEMENT Ola o Shut off power at main breaker Remove coupling from conveyor shaft one screw at end of motor shaft Remove control box top and rear control box cover Remove three screws and remove main control board and mounting bracket Disconnect wiring for motor and remove motor mounting screws Remove conveyor motor and mounting bracket Remove conveyor motor from mounting bracket Reassemble in reverse order and check system operation AIR PRESSURE SWITCH REPLACEMENT 1 2 3 4 6 Shut off power at main breaker Remove control box top Remove tube from air pressure switch Remove wiring
6. from air pressure switch and conveyor motor capacitor and mark all wiring for reassembly Remove two screws and remove air pressure switch capacitor mounting bracket Remove air pressure switch from mounting bracket Reassemble in reverse order and check system operation AIR PRESSURE SWITCH ADJUSTMENT 1 2 3 4 Apply power to machine set temperature control to maximum temperature Allow 30 minute preheat Adjust air pressure switch so that switch will stay closed at maximum temperature Remove air tube from air pressure switch and verify that switch opens Heconnect air tube and check system operation THERMOCOUPLE REPLACEMENT pr Qt gt Shut off power at main breaker Remove control box top Remove rear cover Remove right side heating element cover Remove mounting screws and remove thermocouple from oven cavity Disconnect thermocouple from main control remove thermocouple Remove connector plug from new thermocouple and mark wires for reassembly Install thermocouple and reassemble plug connector Reassemble in reverse order and check system operation DTF 1920 Series Service Manual THERMOCOUPLE MEASUREMENT TEMPERATURE F D C MILLIVOLTS 200 2 8 250 4 0 300 5 1 350 6 0 400 7 1 450 8 2 500 9 3 550 10 4 600 11 5 THERMOSTAT HI LIMIT REPLACEMENT Shut off power at main breaker Remove rear cover remove right side heating element cover Remove hi limit thermo
7. main fan motor Closing the main power switch supplies 208 240VAC to the primary of the control transformer Secondary voltage 24VAC is supplied to the oven control The oven control is set to desired temperature The thermocouple will provide varying millivolts to the oven control The oven control supplies 208 240VAC to the coil of the heater relay at intermittent intervals to maintain the desired temperature The display on the oven control will indicate when the main heater relay is energized NOTE The display also indicates oven temperature Closing the infrared heater switch supplies line voltage to the coil of the infrared heater relay its contacts now close supplying 208 240VAC to the infrared heaters Closing the main power switch supplies 208 240VAC to the primary of the control transformer and through the air pressure switch the Infrared heater switch to the conveyor motor Secondary voltage 24VAC is supplied to the oven control Setting the oven control to the desired time outputs voltage through a reversing switch and capacitor to the conveyor motor NOTE The conveyor system uses a hall effect sensor and magnet to prove operation of the conveyor motor If the conveyor motor is not running BELT JAM is indicated on the display When the machine is started the time delay relay timing circuit is enabled permitting the main fan to operate for approximately 30 minutes after the machine is shut off to cool the machine The
8. 29040 Couplingsleeve 306 X Washer 3505 000 j 370458 Heating element Infrared 208VAC 2122 370460 Heating element Infrared 240VAC 97042 Motor conveyor 2370383 Capacitor conveyor motor 8694390 Air pressure switch 37063 ITopconrobx N 37064 O 62370465 Cover rearcontrolbox DTF 1920 Series Service Manual TYPIC ELEMENTS DTF 1920 Series Service Manual 19 20 REAR VIEW MODEL 1921 1922 B 3942 D 5370468 Cover heating element 4060485 Motor main fan S N 8001208 and Above Cover heating element Il 370472 JjAirswichtubeassy 1 37041 Heatingelement 42 4 O 376 Thermostat hi limit P 30359 Reversing switch conveyor 0 39416 R 1399 Fuseholder DTF 1920 Series Service Manual TW TVOIdA 1 21 DTF 1920 Series Service Manual CONVEYOR MODEL 1921 1922 S N 8001199 and Below 96071 369471 3 0484 DTF 1920 Series Service Manual CONVEYOR MODEL 1921 1922 S N 8001200 and Above A 123077 X B 3078 gt 2 C
9. 30 minute time delay relay will keep the coil of the main fan relay energized maintaining operation of the main fan motor for 30 minutes DTF 1920 Series Service Manual SCHEMATIC DIAGRAM MODEL 1921 S N 8001207 and Below 8 879082 u3HSINIA 310 104140 HJNMOJSNVHI IYX YOAJANOD YOLOW DU E IVISONUJHL l LI TEE RENE S CR NOI1V30913N02 25 i 7 DU spra PIAIOSPoo 331V3H 038VHINI HOLIMS 25 IN u3yv3ug 1102812 282 82 NIYN HOLIMS IS NIVW AVT3U 431V3H 03UVH INI 23 NIVW 1V139 IY YOLOW YOLIOWdYD 22 NIVA UOLIOVdVO 19 HOLIMS 34155344 SdV M 0001 NIVW u31V3H d Y WOOD 3019 LH9IY 4 1 301 1131 50 HZ E gt lt gt lt 1a bat c JUMPER TO 60 HZ J lt gt sas JA 54 MILI i in See er a 5 l 92 OUJNDOHS 0712195 134 AO 2 038 lt L Cd yi r ae o IS y il YX NO OL 3UIM A802 191 1 YX NO OL A0F2 N05 1 A 11 DTF 1920 Series Service Manual SCHEMATIC DIAGRAM MODEL 1922 S N 8001207 and Below VIOS908 YSHSINI4 310 VNVIGNI 3NAVA 1303 TUN
10. SERVICE MANUAL DUAL TECHNOLOGY FINISHER MODEL 1920 SERIES Lincoln Lincoln Foodservice Products LLC 1111 North Hadley Road Fort Wayne Indiana 46804 United States of America Phone 800 374 3004 U S Fax 888 790 8193 Int l 260 436 0735 Technical Service Hot Line 800 678 9511 www lincolnfp com SLAR SERVICE AND PARTS DTFsvcman REV 1 5 07 SEQUENCE OPERATION DUAL TECHNOLOGY FINISHER 1921 1922 POWER SUPPLY MAIN FAN CIRCUIT TEMPERATURE CONTROL INFRARED HEAT CONVEYOR DRIVE AUTOMATIC COOL DOWN 208VAC 60 HZ 3 PHASE 240VAC 60 HZ 3 PHASE Electrical power to be supplied to the oven by a four conductor service for three phase Black conductor is hot Red conductor is hot Orange conductor is hot Green conductor is ground Power is permanently supplied through the 10 amp fuses through the normally closed oven cavity hi limit thermostat to the normally open main power switch and to terminal number 1 of the 30 minute cool down timer Closing the main power switch enables the 30 minute cool down timer The 30 minute cool down timer supplies line voltage to the coil of the main fan relay its contacts now close supplying 208 240VAC to the main fan motor Voltage is also supplied to the primary of the control transformer the conveyor motor the oven control and the infrared heater switch NOTE Model 1922 ovens use a 240VAC to 208VAC step down transformer for the
11. couple should read approx 110 If these readings are not achieved replace the thermocouple If these readings are correct proceed If the thermocouple checks good but the oven control display indicates that there is a thermocouple failure replace the oven control If the oven control indicates a temperature reading but the oven will not heat proceed WITH POWER ON AND THERMOCOUPLE ATTACHED TO THE OVEN CONTROL Measure the DC millivolt output of the thermocouple Refer to the thermocouple chart located in the Removal section of the manual for proper millivolt readings If these readings are not achieved replace thermocouple If the thermocouple checks good but there is no voltage output to the Main heater relay replace the oven control If there is voltage output to the Main heater relay proceed Check for supply voltage to the relay coil If voltage is present and the relay will not activate replace the Main heater relay Also check each relay contact for high voltage input and output Check the Amp draw on each power leg for proper load Check the specification plate for rating information If the amp draw is high or low check the individual elements for opens shorts and proper resistance WITH POWER OFF To check resistance of the elements remove all leads from the elements and use a digital multimeter The element resistance should be as follows 208V 43 ohms approx 240V 57 ohms approx Replace
12. e discharge before testing Check continuity between switch terminals m as needed Oven control If there is supply voltage to the motor and the motor motor capacitor and reversing switch check good replace the oven control Conveyor motor runs but there Oven control Check for output voltage from oven control to hall effect Is no speed display sensor sensor is located in conveyor motor Measure voltage at the motor connector red wire and yellow wire Voltage should be approx 10VDC If no voltage is present trace wiring back to oven control If there is no voltage present at the oven control replace the oven control Conveyor motor If there is voltage supplied to the hall effect sensor not achieved replace conveyor motor If the readings are achieved proceed check for a frequency output from the hall effect Oven control If the hall effect sensor readings are correct but there is speed indicated on the display replace the oven control sensor Measure frequency across the yellow and white wires at the motor connector Frequency reading should be approx 25 100 Hz If these readings are DTF 1920 Series Service Manual 9 REMOVAL INSTALLATION AND ADJUSTMENT DUAL TECHNOLOGY FINISHER CAUTION BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE DUAL TECHNOLOGY FINISHER BE SURE TO DISCONNECT THE ELECTRICAL POWER SUPPLY MOTOR MAIN FAN REPLACEMENT 9 6
13. e to use ground strap so that there is no static electricity When installing new control be sure to set the jumpers on the control for proper DTF 1920 Series Service Manual 13 voltage 120 240 and frequency 50Hz 60Hz After the new control is installed the control will need to be initialized To initialize the new control press and hold the two center buttons on the front control panel After the oven starts release the buttons the control is now initialized Reassemble in reverse order and check system operation DTF 1920 Series Service Manual DTF 1920 Series Service Manual This page intentionally left blank GENERAL VIEW MODEL 1921 1922 G 3047 Fingercover upper H 3042 gt Columnatingplate upper 00 l 370439 Fingerhousing upper J 370448 _ _ JjAiwashpanelupper x K 3049 Airwashpanel lower O Z L 37450 X 9 Jj fMtumfastener 00 M 39741 jArreumassy 1 o N 370452 Fingersupport upper o o o O 37054 j Plnumfon P 370453 Finger support lower 97455 TO R 369873 Receptacle 1 4 turn fastener G Z lt ed c DTF 1920 Series Service Manual DTF 1920 Series Service Manual 17 CONTROL BOX VIEW MODEL 1921 1922 A 369432 Switch on off 5237056 Label controlpanel D 23869600 compression E 3943 Drive key F
14. heating elements as needed No Infrared Heating Check for main fan operation If it is not operating refer to Oven fan will not run Air pressure switch Check for 208 240VAC to the air pressure switch If no voltage is present trace wiring back to main power switch This normally open switch should close when the main fan is activated Refer to the Removal and Installation section for proper adjustment Replace as needed Switch Infrared heater Check for 208 240VAC to the Infrared heater switch If no voltage is present trace wiring back to the air pressure switch WITH POWER OFF Check continuity between switch terminals Replace switch as needed Infrared heater relay Check for supply voltage to the relay coil If no voltage is present trace wiring back to Infrared heater switch If voltage is present and the relay will not activate replace the Infrared heater relay Also check each relay contact for high voltage input and output Infrared Heating element s Check the Amp draw on each power leg for proper load Check the specification plate for rating information If the amp draw is high or low check the individual elements for opens shorts and proper resistance WITH POWER OFF To check resistance of the elements remove all leads from the elements and use a digital multimeter The element resistance should be as follows 208V 45 ohms approx 240V 58 ohms approx Replace heating elements as needed Oven heats w
15. ith switch off Main heater relay or The Main heater relay or Infrared heater relay has Infrared heater relay probably failed in the closed position If there is no voltage to the operating coil but there is high voltage at the relay output replace the heater relay Intermittent heating Thermal overload of motor The main fan motor is equipped with internal thermal protection and will cease to operate if overheating occurs As the motor overheats and then cools this will cause the oven to cycle on and off intermittently Improper ventilation or lack of preventive maintenance may cause this Also most of the problems listed under Oven will not heat can cause intermittent failure Conveyor will not run NOTE Display will indicate 2200 Belt Power supply Check circuit breakers reset if required Check power plug to be sure it is firmly in receptacle Measure incoming power call power co if needed Fuse 10 Amp Check replace if necessary Fuse holder Check replace if necessary Hi limit thermostat oven cavity Terminals are normally closed If open reset thermostat and retest If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature setting check for proper location of capillary bulb in its spring holder If the capillary checks okay replace the hi limit thermostat DTF 1920 Series Service Manual Switch Main Power WITH POWER OFF Check continuity between s
16. older Check replace if necessary Hi limit thermostat Terminals are normally closed If open reset Oven cavity thermostat and retest If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature setting check for proper location of capillary bulb in its spring holder If the capillary checks okay replace the hi limit thermostat Switch main power Check continuity between switch terminals Replace switch as needed 30 minute time delay relay Check for supply voltage to 30 minute time delay relay at terminals 1 and 6 If no voltage is present trace wiring back to main power switch If there is supply voltage at terminals 1 and 6 check for output voltage at terminals 2 and 3 If there is incoming voltage but no output voltage and the main power switch is on replace the 30 minute time delay relay Relay main fan Check for supply voltage to relay contacts if no voltage Is present trace wiring back to power supply Check for supply voltage to the coil of the main fan relay If no voltage is present trace wiring back to the 30 minute time delay relay If voltage is present check to insure contacts are closing Replace as needed Transformer Motor Check for 240 VAC supply to the transformer primary If MODEL 1922 ONLY no voltage is present trace wiring back to relay If 240VAC is present at transformer primary check for 208VAC at the transformer secondary If there is primary voltage bu
17. ondary If there is primary voltage but no secondary voltage replace the control transformer Check for 24VAC supply to control If no voltage is present trace wiring back to control transformer If 24VAC is present check for a read out on the display If there is 24VAC supplied but there is no read out on the control display replace the oven control If there is a read out on the control set the control to maximum temperature see installation operations manual for temperature adjustment With the control set at maximum temperature check for supply voltage to the oven control at terminals J3 12 and J3 3 If there is no voltage present trace wiring back to the air pressure switch If there is voltage present check for output voltage at the Main heater relay R1 If there is voltage at the Main heater relay proceed to Main heater relay for next check If there is no voltage at the Main heater relay trace wiring back to the oven control If there is no voltage output at the oven control check the read out on the control If the control reads PROBE FAIL this indicates that the thermocouple has failed or become disconnected from the oven control Check to be sure that the thermocouple is securely connected to the oven control If the thermocouple is connected to the oven control and the control indicates PROBE FAIL disconnect the thermocouple from the oven control and measure the resistance of the thermocouple The thermo
18. stat from the mounting bracket Remove mounting nut from hi limit thermostat Remove hi limit thermostat Form 90 bend in hi limit thermostat Reassemble in reverse order and check system operation Be sure to reset thermostat before testing HEATING ELEMENT MAIN REPLACEMENT 1 2 3 4 5 Shut off power at main breaker Remove conveyor finger assemblies and plenum front Remove rear cover and appropriate heating element cover Remove wires from heating element and mark wiring for reassembly Remove mounting screws and remove heating element Reassemble in reverse order and check system operation HEATING ELEMENT INFRARED REPLACEMENT 1 2 3 4 Shut off power at main breaker Remove conveyor and lower finger assemblies Remove front conveyor support from oven cavity Remove front cover and heating element cover Disconnect wiring from heating element and mark wires for reassembly Reassemble in reverse order and check system operation MAIN CONTROL REPLACEMENT 5 Shut off power at main breaker Remove control box top front panel and rear control box cover Remove display board from front panel by pulling board off of it s mounting pins Remove three screws from main control mounting bracket and remove main control board and its mounting bracket Remove main control from it s mounting bracket by pulling the control from the mounting bracket When installing new control be sur
19. t no secondary voltage replace transformer Circuit breaker s 3A Push and reset circuit breakers Check for voltage to the circuit breaker If no voltage is present trace wiring back to the main fan relay If there is voltage present proceed Check for continuity through the circuit breaker if the circuit breaker has been reset and there is no continuity through the circuit breaker replace the circuit breaker Main fan motor Check for supply voltage at motor If no voltage is present trace wiring back to circuit breakers BEN WITH POWER OFF Check for opens shorts or grounds Turn fan blade to check for locked rotor Capacitor Check for shorts or grounds Ha RN WARNING Capacitor has a stored charge discharge before testing Oven will not heat Check for main fan operation If it is not operating refer to Oven fan will not run Air pressure switch This normally open switch should close when the main fan is activated Refer to the Removal and installation section for proper adjustment Replace as needed DTF 1920 Series Service Manual Control transformer Oven control Thermocouple Oven control Thermocouple Oven control Main heater relay Heating element s DTF 1920 Series Service Manual Check for 208 240VAC supply to the primary of the control transformer If no voltage is present trace wiring back to the main power switch If voltage is present check for 24VAC at the transformer sec
20. verse order and check system operation DTF 1920 Series Service Manual CIRCUIT BREAKER MAIN MOTOR REPLACEMENT Shut off power at main breaker Remove rear cover Remove wires from appropriate circuit breaker and mark wires for reassembly Remove mounting nut from circuit breaker and remove circuit breaker Reassemble in reverse order and check system operation Be sure to reset circuit breaker before operation pudet FUSE HOLDER REPLACEMENT Shut off power at main breaker Hemove rear cover Hemove wires from appropriate fuse holder and mark wires for reassembly Hemove mounting screws from fuse holder and remove fuse holder Reassemble in reverse order and check system operation UP o quet RELAY MAIN HEATER RELAY INFRARED HEATER REPLACEMENT Shut off power at main breaker Remove rear cover Remove wires from appropriate heater relay and mark wires for reassembly Remove mounting screws from heater relay and remove heater relay Reassemble in reverse order and check system operation Be sure to mount the heater relay in the upright position mounting the relay upside down will cause the relay to be in the constant on position Io REVERSING SWITCH CONVEYOR REPLACEMENT Shut off power at main breaker Remove rear cover Remove wires from reversing switch and mark wires for reassembly Remove mounting nut from reversing switch and remove reversing switch Reassemble in reverse order
21. witch terminals Replace switch as needed Control transformer Check for supply voltage to the primary of the control transformer If no voltage is present trace wiring back to the oven power relay If voltage is present check for 24 VAC at the transformer secondary If there is primary voltage but no secondary voltage replace control transformer Air pressure switch Check for 208 240VAC to the air pressure switch If no voltage is present trace wiring back to main power switch This normally open switch should close when the main fan is activated Refer to the Removal and installation section for proper adjustment Replace as needed Switch Infrared heater Check for 208 240VAC to the Infrared heater switch If no voltage is present trace wiring back to the air pressure switch WITH POWER OFF Check continuity between switch terminals Replace switch as needed Conveyor motor Check for supply voltage to the conveyor motor If no voltage is present trace wiring back to the primary of the control transformer If voltage is present and the motor will not run check the motor windings for opens or shorts WITH POWER OFF Check the motor windings as follows Grey to black 286 ohms approx Grey to brown 236 ohms approx Brown to black 472 ohms approx If any of the above fails replace conveyor motor Capacitor conveyor motor Check for shorts or grounds Replace capacitor as needed WARNING Capacitor has a stored charg
Download Pdf Manuals
Related Search