DTF - 1960 Series Service Manual
Contents
1. 1 Put conveyor belt back on by setting the rolled belt to the left of the conveyor and thread approximately 2 3 of the belt over the bottom of the slider bed 2 Put the loose end of the belt around the idler shaft and back on the conveyor The belt must lay on top of the upper conveyor slider bed NOTE The belt should curl around the conveyor sprockets and lay flat on top of the sprockets If the belting does not curl around the sprockets and lay flat remove the belting and turn over Reinstall 3 Pull all of the slack belt through the conveyor until both ends are on top of the conveyor on the left end 4 Reconnect the conveyor belt by slipping the connecting links back in place NOTE The conveyor belt of the Impinger DTF does not have a tension adjustment If the belt would become too loose a link s will have to be removed to tighten A belt that is too tight will also cause operational problems due to excessive drag We suggest that you have a qualified service person perform this adjustment DTF 1960 Series Service Manual 17 Careful consideration should be exercised prior to A WARNING removing a belt link because a belt that is too tight will impede the smooth operation of the conveyor Do not work around conveyor belt with long hair loose CAUTION clothing or dangling jewelry Getting caught in the belt could result in dismemberment or fatal injury CAUTION BELT MAY BE HOT CONVEYOR ASSEMBLY 18 DTF 19602. 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 secondary If there is primary voltage but no secondary voltage replace the control transformer Oven control 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 DTF 1960 Series Service Manual 5 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 Thermoc
3. 369922 Support Rod Bottom M 370613 Bearing High Temp not shown 370615 Crumb Pan Drive End not shown 370614 Crumb Pan Idle End not shown 370612 Conveyor Assembly Complete CONVEYOR VIEW MODEL 1960 SERIES DTF 1960 Series Service Manual DTF 1960 Series Service Manual This page intentionally left blank 29 30 This page intentionally left blank DTF 1960 Series Service Manual DTF 1960 Series Service Manual This page intentionally left blank 31 TA Lincoln Lincoln Foodservice Products LLC 1111 North Hadley Road Fort Wayne Indiana 46804 United States of America Telephone 260 459 8200 U S Fax 888 790 8193 Int l Fax 260 436 0735 Service Hotline 800 678 9511 www lincolnfp com Encdis CERTIFIED SERVICE AND PARTS
4. 370605 Electrical Panel LH DTF 1960 Series Service Manual REAR VIEW MODEL 1960 SERIES 3 7 e 25 DTF 1960 Series Service Manual I R ELEMENTS VIEW MODEL 1960 SERIES S N 8001209 AND ABOVE Model Description Part Number 1961 370695 1962 370696 1962 000 E 370696 1963 000 E 370698 1964 000 E 370697 1964 370697 S N 8001208 AND BELOW AH Model Description Part Number 1961 370602 1962 370616 26 DTF 1960 Series Service Manual MAIN FAN ELEMENTS VIEW MODEL 1960 SERIES S N 8001209 AND ABOVE Model Description Part Number 1961 370699 1962 370702 1962 000 E 370702 1963 000 E 370700 1964 000 E 370701 1964 370701 S N 8001208 AND BELOW Model Description Part Number A 120 VAC 1961 370630 A 240 VAC 1962 370461 B 120 VAC Circular 1961 370629 B 240 VAC Circular 1962 370617 DTF 1960 Series Service Manual 27 28 CONVEYOR MODEL 1960 SERIES A 370610 Shaft idler B 370509 Drive Sprocket C 369516 Bearing Conveyor D 370611 Shaft Drive E 369471 Pin E 10000550 Frame Conveyor G 369412 Connecting Link Conveyor four required H 369481 Belt Conveyor 369920 Stud Retainer Tinnerman J 370622 Roller Conveyor Belt K 370609 Bracket Conveyor Bearing L
5. Series Service Manual DTF 1960 Series Service Manual This page intentionally left blank 19 20 GENERAL VIEW MODEL 1960 SERIES A 370515 Rubber Bumper B 370593 Front Cover C 370594 Front Element Cover D 370587 Finger Housing Bottom Right Marked B2 E 370578 Columnating Panel Bottom Right amp Left F 370595 Finger Cover Bottom Right amp Left G 370450 Ya Turn Fastener H 370596 Air Wash Assembly 370596 Air Wash Assembly J 370581 Finger Cover Top Right K 370579 Columnating Panel Top Right L 370585 Finger Housing Top Right Marked T2 M 370619 Plenum Front N 370597 Drive Shaft Cover O 370598 Top Cover P 370587 Finger Housing Top Left Marked T1 R 370579 Columnating Panel Top Left S 370580 Finger Cover Top Left T 370596 Air Wash Assembly U 370596 Air Wash Assembly V 370595 Finger Cover Bottom Left W 370578 Columnating Panel Bottom Left x 370585 Finger Housing Bottom Left Marked B1 Y 369373 Receptacle Snap In DTF 1960 Series Service Manual GENERAL VIEW MODEL 1960 SERIES gt ne 5 DTF 1960 Series Service Manual 21 CONTROL BOX MODEL 1960 SERIES 370462 Motor conveyor 370601 Top control box A 369432 Switch on off B 370573 Label control panel C 370599 Front panel D 370571 Control main and display E 370383 Capacitor conveyor mot
6. is also supplied to the primary of the control transformer the conveyor motor the oven control TEMPERATURE CONTROL 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 voltage to the coil of the heater relays 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 INFRARED HEAT Adjusting the oven control will allow up to four infrared elements to be operated The control will energize the required relays supplying 208 240VAC to the infrared heaters CONVEYOR DRIVE Closing the main power switch supplies 208 240VAC to the conveyor motor and to the primary of the control transformer 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 AUTOMATIC COOL DOWN 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 30 minute time delay relay will keep the coil of the main f
7. 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 Circular element 120V 7 5 ohms approx Side elements 120V 14 ohms approx Replace heating elements as needed No Infrared Heating Main fan motor Check for main fan operation If it is not operating refer to Oven fan will not run 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 Ifthe amp draw is high or low check the individual elements for opens shorts and proper DTF 1960 Series Service Manual Oven heats with switch off Main heater relay or Infrared heater relay 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
8. ohms approx Replace heating elements as needed The Main heater relay or Infrared heater relay has 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 s 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 Belt Jam 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 Switch Main Power WITH POWER OFF Check continuity between switch terminals Re
9. reassembly Remove cooling fan Remove motor from motor mount Reassemble in reverse order and test for proper operation CAPACITOR MAIN FAN MOTOR REPLACEMENT Boo Shut off power at main breaker Remove rear cover open rear access panels Discharge capacitor disconnect wiring and remove capacitor Reassemble in reverse order and check system operation MAIN FAN REPLACEMENT See MOTOR MAIN FAN above SWITCH ON OFF REPLACEMENT Ole GS DI 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 Shut off power at main breaker Remove rear cover open rear access panels 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 DTF 1960 Series Service Manual RELAY MAIN FAN REPLACEMENT I ct Shut off power at main breaker Remove rear cover open rear access panels Remove wires from main fan relay and mark wires for reassembly Remove mounting screws and remove main fan relay Reassemble in reverse order and check system operation FUSE HOLDER REPLACEMENT Oto Shut off power at main breaker Remove rear cover open r
10. L 181 YI YILVIK Il NOI1V3091 JNO IS LINE H9IH NJAO IVISONBIHI 11 NIVW 831V3H ra 31V1S 01105 AV13Y 2S 02S 12S 51081003 Y SU31V3H HOLOM ISNI 84 x ONISUJAJY YOAZANOI HOIIMS 5 INIT 31113 NIVW HOLIMS IS NJAO 1081NO2 NE A NVI NIVW 1V13U 28 001553000405 ISION 7109 831130 NIVN AV13U 18 00155380005 351010 8011219183 S YOLOW BOAJANOD TOHLNOJ 021 313 3010W 80138103 201172 1081003 YIMBOISNVYL 18X 820138103 8010 ZW NVI NIVH 30119VdV SILNNIM O 4V130 INIL 01 NYS NIVH HOION IW 30055380 BIY HOLIMS av w NI 901VNY 08 a 9 ef PG 8 038 _ Mo t 9 28 E T t vt PE SE GE e INO NI 3 0 IUSH H 9H H IR 1133 1W23 H2 IEI 2 19 Say 8 311HM V 311HM 0382 INT HTB HLN DTF 1960 Series Service Manual TROUBLESHOOTING GUIDE 1961 120 208 VAC 60 HZ 3 PHASE 1962 120 240 VAC 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 controls Check replace if necessary Fuse holder Hi limit thermostat Oven cavity Check replace if necessary 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 pro
11. SERVICE MANUAL DOMESTIC amp INTERNATIONAL DUAL TECHNOLOGY FINISHER 1960 SERIES Te e Lincoln Lincoln Foodservice Products LLC 1111 North Hadley Road Fort Wayne Indiana 46804 United States of America Telephone 260 459 8200 U S Fax 888 790 8193 Int l Fax 260 436 0735 Service Hotline 800 678 9511 www lincolnfp com DTF1960serv REV 12 7 07 SEQUENCE OF OPERATION DUAL TECHNOLOGY FINISHER 1961 1962 120 208VAC 60 HZ 3 PHASE 120 240VAC 60 HZ 3 PHASE NOTE DTF must be placed on an oven stand for approved operation No other surface may be used for operation POWER SUPPLY Electrical power to be supplied to the oven by a five conductor service for three phase Black conductor is hot Red conductor is hot Orange conductor is hot White conductor is neutral Green conductor is ground MAIN FAN CIRCUIT Power is permanently supplied to the normally open main heater relays the upper and lower IR relays the oven control and through the 10 A motor and control fuses to the normally open main fan relay Power is also supplied through a normally closed hi limit thermostat to terminal number 1 of the 30 minute cool down timer and to the main power switch 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
12. TF 1960 Series Service Manual CONVEYOR MOTOR REPLACEMENT po NO ct 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 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 THERMOCOUPLE REPLACEMENT SiR Shut off power at main breaker Remove control box top Remove rear cover open rear access panels Remove right side heating element cover Remove mounting screws and remove thermocouple from oven cavity Disconnect thermocouple from main control remove thermocouple Reassemble in reverse order and check system operation 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 EON Shut off power at main breaker Remove rear cover open rear access panels remove right side heating element cover Remove hi limit thermostat mounting plate Remove hi limit thermostat Reassemble in reverse order and check system operation Be sure to reset thermostat before testing HEATING ELEMENT MAIN REPLACEMENT m Shut off power at main breaker Remove conveyor finger assemblies and plenum front R
13. TTON 3 to see existing toasting time Use the UP or DOWN BUTTONS to change to desired toasting time 4 The unit will return to normal operations 10 seconds after the last button is pushed and saves the latest program settings 5 Preheat toaster for 30 minutes COOL DOWN CYCLE 1 Push the On Off O switch to the OFF position The unit s main fan will run for approximately 30 minutes after shutting off in a cool down mode PROGRAM MODE 1 To enter the PROGRAM MODE press and hold the UP BUTTON for 5 seconds Each button has a light that indicates when it can be used When no buttons are pressed for 10 seconds the unit will exit the program and retain last entry 2 Use the UP and DOWN BUTTONS to view or change a TEMPERATURE SETPOINT TEMPERATURE BUTTON 1 b TOP IR ON OFF 2 BUTTON c COOK TIME VALUE 3 BUTTON d BOTTOM I Rs ON OFF STATUS 4 BUTTON The TOP I R Icon follows the 8 available selections The BOTTOM I R Icon follows the 8 available selections Top1 Top2 Top3 No top IR Heater is on Program Mode i Top1 Top 2 Top 3 Heater 1 only 0 No Bottom IR is on 4 Heaters 1 amp 2 IR Top1 Top 2 Top 3 2 Heater 2 only IR 1 Heater 1 only 5 Heaters 1 amp 3 O O 3 Top 1 Top 2 Tops Heater 3 only IR a e Top Top2 Top3 4 Heaters 1 8 2 only ava IR Bottom 2 Heater 2 only B
14. an relay energized maintaining operation of the main fan motor for 30 minutes DTF 1960 Series Service Manual SCHEMATIC DIAGRAM DOMESTIC MODELS MILA UYIY 1011180911103 IS NIVH HOLIMS IS U3MOd NIVH AW138 GU M0002 UuV1n2812 YILVIH EH IH j1193W00 7 NY3 NIVW AV13U QU 001 Ul ISNI 84 94 1081003 YIMYOISNYYL IYX 123130 31115 01105 HOIIMS USS AY38 18 MO1109 YI ISNI 61i i 81 91 8 410 NE LE 310NIN OG 4V130 INIL QL 00134103 YOLOW ZW 51001103 Y YOLON ISNI 23 13 3dAL 37ANODONYIHI OL NYJ NIVW YOLON IN YOLON 80138103 1081NOO QWOV HX3 LIKT H9IH NJAO IVISONYIHI 11 AVIS 01305 310d 2 AV13Y IUSH NJAO TOULNOD 3 YILVIH NIVW USS 05 5 MOOS 83NO1 QIUYBANI YILVIH 11H 6H 820108 280138003 30119VdV 3 9N1SU3A38 YOAIANOD HOLIMS 25 MOOS W3ddN Q38VEJNI N31V3H 8H 9H NYJ NIVW YOLIDWAVO 19 iv tv 90 1YNY B 69 89 B 3L1HM V 3LIHM 03872 3N11 er r JIE YIN 3 08 _ CEE EG b PE SE GE INO NI 2 0 012317 33 d 01 Ol v2 3814 12110103 2 d 01 OL 2 3UIM LOINNOD ABO 119 119 n9 0 20 10 su o of A A AAA A A AE AAA O EDEL EEN ni eo 90 126 201127 1180 20i 66 06 10 poff DTF 1960 Series Service Manual SCHEMATIC DIAGRAM EXPORT MODELS AV138 2 3104 01705 31915 21 73140030831 1011 M31 8V38 U3MOd NIVN 2018 TYNINYI
15. d reach 710 F to 760 F Calibration is complete NOTE Cavity temperature should not exceed 825 F If Hi Limit trips replace Hi Limit MAIN CONTROL REPLACEMENT 16 NE e Shut off power at main breaker Remove control box top front panel and rear control box cover Disconnect all wiring from control and mark all wiring for reassembly Remove mounting screws from main control and remove main control board This is a two piece control be sure to replace both parts when the control is replaced Reassemble in reverse order and check system operation DTF 1960 Series Service Manual CONVEYOR DISASSEMBLY FOR CLEANING Pull conveyor out the right end Place on table or work surface CA TINI CONNECTING TG Dr LINKS IN THREE eee PLACES 1 Locate connecting links on the conveyor belt turn belt to place the links on the top left end of the conveyor approximately 8 203mm from the shaft 2 You can easily remove the connecting links by grasping them with a pair of pliers and slipping the eye of the connecting link over the wire of the other links Also notice the direction of the other links The belt will have to be reinstalled with the opening facing the same way 3 Carefully pull out the belt rolling it up as you go After you have it removed it may be placed in a pan of detergent solution to soak Rinse with clean water CONVEYOR REASSEMBLY Conveyor Belt Installation CDNYEYOR DAVE Q OS
16. e 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 check for a frequency output from the hall effect 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 not achieved replace conveyor motor If the readings are achieved proceed Oven control If the hall effect sensor readings are correct but there is no speed indicated on the display replace the oven control DTF 1960 Series Service Manual 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 6 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 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
17. ear access panels Remove wires from appropriate fuse holder and mark wires for reassembly Remove mounting screws from fuse holder and remove fuse holder Reassemble in reverse order and check system operation RELAY MAIN HEATER RELAY INFRARED HEATER REPLACEMENT oro Shut off power at main breaker Remove rear cover open rear access panels Remove wires from appropriate relay and mark wires for reassembly Remove mounting screws from relay and remove relay Reassemble in reverse order and check system operation REVERSING SWITCH CONVEYOR REPLACEMENT ABS Shut off power at main breaker Remove rear cover open rear access panels Remove wires from reversing switch and mark wires for reassembly Remove mounting nut from reversing switch and remove reversing switch Reassemble in reverse order and check system operation TRANSFORMER CONTROL REPLACEMENT Or x c I Shut off power at main breaker Remove rear cover open rear access panels 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 CAPACITOR CONVEYOR MOTOR REPLACEMENT 10 Shut off power at main breaker Remove control box top and rear control box cover Discharge capacitor remove wiring from capacitor and remove one mounting screw Remove capacitor Reassemble in reverse order and check system operation D
18. emove rear cover open rear access panels and remove 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 DTF 1960 Series Service Manual 11 HEATING ELEMENT INFRARED REPLACEMENT Shut off power at main breaker 2 Remove conveyor and lower finger assemblies Remove front conveyor support from oven cavity 3 Remove front cover and heating element cover Disconnect wiring from heating element and mark wires for reassembly 4 Reassemble in reverse order and check system operation MAIN CONTROL SETTINGS o o 2 56 4 III Lincoln START UP 1 Push the On Off O switch to the ON position The display will indicate SELECT PROGRAM 2 Press the 1 PROGRAM BUTTON The toasting program will indicate SANDWICH The 1 program button will blink Buttons 2 3 and 4 can be used for other menu item programs 3 Programming the unit to desired settings To enter the program mode press and hold the UP BUTTON for 5 seconds The UP and DOWN BUTTONS will light indicating the control is in a change status 12 DTF 1960 Series Service Manual a Press the TEMPERATURE BUTTON 1 to see existing toasting temperature Use the UP or DOWN BUTTONS to change to desired temperature b Press the TIME BU
19. or F 370519 Bracket Motor G 370600 Cover rear control box H J 370547 Gasket Conveyor Motor K See Page 26 Heating element Infrared s n 8001208 amp below Not Shown See Page 26 Heating element Infrared s n 8001209 amp above L 350259 Screw M 370106 Washer N 369413 Drive key O 369460 Spring compression P 370671 Coupling sleeve DTF 1960 Series Service Manual CONTROL BOX VIEW MODEL 1960 SERIES 24 REAR VIEW MODEL 1960 SERIES A 370475 Cover Rear B 370603 Cover Heating Element C 370618 Motor Mount D 370604 Electrical Panel RH E 370603 Cover Heating Element F 370546 Fuse 8A G 370342 Fuse Holder H 370570 Relay Impingement Heating Elements 369422 Relay Main Fan J 370538 Relay IR Elements K 370515 Rubber Bumper L 370569 Relay Solid State M 370582 Contactor 3 Pole N 370583 Power Cord O 370693 Strain Relief domestic models only 370694 Strain Relief export models only P 370552 Reversing Switch Conveyor Q 369166 Fuse 10A R 369129 Fuse Holder S 357067 Thermostat Hi Limit T 369192 Capacitor U 370576 Thermocouple V 370577 Main Fan W See Page 27 Heating Element Chart Y 369427 Transformer Control Z 370466 Timer Cool Down 30 minute AA 369422 Relay Main Fan BB 370606 Cooling Fan CC 369033 Hose Clamp DD 370607 Motor Main Fan EE
20. ottom s Heaters 2 amp 3 Top 1 Top 2 Top 3 5 Heaters 1 amp 3 only IR I ap a All Bottom IR 6 oe oo otom Top1 Top2 Top3 Heaters 2 amp 3 only d Heaters on IR Bottom 3 Heater 3 only Bottom 7 Factory Default e e e 7 All top IR Heaters are on PP E 1083 factory default DTF 1960 Series Service Manual 13 9 Set TEMPERATURE UNITS C or F9 a Press and hold BUTTON 1 for 20 seconds to change the C or F value b To change again repeat step a 4 Set TEMPERATURE DISPLAY between REAL and SETPOINT a Press and hold BUTTON 4 for 20 seconds b To change again repeat step a 5 Set LANGUAGE SELECTION a Press and hold BUTTON 2 for 20 seconds Use UP and DOWN BUTTONS to select language SUBSET POINTS MENU 1 To enter SUBSET MENU press and hold the TIME BUTTON 3 for 20 seconds BUTTON 3 toggles between parameter names and values a If parameter name is displayed use the UP and DOWN arrow buttons to browse through previous next parameter in the list b If parameter value is displayed use the UP and DOWN arrow buttons to change the parameter value to within the allowed limits 2 Select the parameter to be adjusted by pressing the TIME BUTTON 3 when the parameter is displayed 3 Use the UP and DOWN arrow buttons to change the value within the allowed limits See Chart below 4 To EXIT the menu press TIME BUTTON 3 for 3 seconds Or if no button is pre
21. ouple 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 thermocouple should read approx 110 If these readings are not achieved replace the thermocouple If these readings are correct proceed Oven control Thermocouple 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 Oven control 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 Main heater relay Heating element s 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
22. per 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 Main fan motor Check for supply voltage at motor If no voltage is present trace wiring back to circuit breakers WITH POWER OFF Check for opens shorts or grounds Turn fan blade to check for locked rotor Capacitor Check for shorts or grounds WARNING Capacitor has a stored charge discharge before testing Oven will not heat Main fan motor Check for main fan operation If it is not operating refer to Oven fan will not run Control transformer Check for 208
23. place 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 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 236 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 charge discharge before testing Switch conveyor reversing Check continuity between switch terminals Replace switch as needed Oven control If there is supply voltage to the motor and the motor motor capacitor and reversing switch check good DTF 1960 Series Service Manual replace the oven control Conveyor motor runs but there is no speed display Oven control Check for output voltage from oven control to hall effect sensor sensor is located in conveyor motor Measure voltag
24. set should be set around 25 minus 25 to make the cavity temp equal to the Display Temp If the Cavity Temp is at 565 F with the Display Temp set at 575 F then the Probe Offset must change by 10 degrees For example if the Probe Offset was at 40 and the change in the Probe Offset is calculated to be 15 then the Probe Offset must be 55 To access the Probe Offset option press the hold button 3 for about 30 seconds The display will scroll Temperature Units when the control enters the correct menu Use the up down arrow button to scroll through the options until Probe Offset scrolls across the display At this point press and release button 3 and the display will show the current set point of the Probe Offset Default setting is 60 Use the up down arrows to adjust the offset based on the calculated Change in Probe Offset from above Once the Probe Offset is changed to the desired value press and hold button 3 for 3 seconds to exit the menu Oven will now return to the heat mode and the light next to button 3 should flash until oven reaches set temperature of 600 F Check the cavity temperature again after oven temperature has stabilized to ensure that the Probe Offset is now correct Once the cavity temp and display temp match within 5 F the calibration is complete Press Program 1 key IRs will turn on and the settings are preset Maximum temperature setting is 650 F Cavity temperature shoul
25. ssed for 30 seconds the unit will automatically EXIT the SUBSET MENU SUBSET LIMITS DEFAULTS PARAMETER VALUE LIMITS FACTORY DEFAULT DEFAULT SET POINT F 32 to 700 F 575 Preheat Mode C 0 to 370 C 300 Main Heater F 200 to 200 F 60 PROBE OFFSET C 129 to 94 C 33 Main Heater F 32 to 700 F 650 MAXIMUM SET POINT C 0 to 370 C 340 Main Heater F 32 to 700 F 215 MINIMUM SET POINT C 0 to 370 C 100 DEFAULT COOK TIME 0 14 to 10 00 MM SS 0 21 MM SS CALIBRATION 4 to 4 0 Conveyor Speed See instructions below NOTE CALIBRATION instructions The calibration must be done at 33 seconds of cook time A positive value in this parameter accelerates the conveyor and a negative value decelerates the conveyor 14 DTF 1960 Series Service Manual SYSTEM DIAGNOSTICS SAFE MODE Occurs when the unit detects a defective temperature probe Display will scroll SAFE MODE CALL SERVICE Main Heater is off Selected COOK program light is on Top and Bottom I R heaters are on Error light is on ALARM sounds Can be turned off by pressing the DOWN ARROW BUTTON COOK PROGRAM and SUBSET MENU modes are not accessible Unit can be restarted after a 30 minute COOLDOWN CYCLE op a SHUTDOWN MODE Occurs when the unit detects a conveyor error a Display will scroll SHUTDOWN CALL SERVICE b Main Heater is off C Top and Bottom I R Hea
26. ters are off d ALARM sounds Can be turned off by pressing the UP ARROW BUTTON e Unit can be restarted after 30 minute COOLDOWN CYCLE TEMPERATURE CALIBRATION Calibration is to be performed with oven control set at 650 F with the belt speed set at 4 00 minutes and all IR s off The cavity temperature is to be measured in the center of the oven cavity with the temperature sensing device resting on the conveyor belt Calibration must be done with all covers fingers air washes and conveyor belt in place to ensure accuracy for Gecko equipped DTT ovens 1 If oven is not on turn oven on Display will light up and run through start up sequence After start up sequence display will scroll Select Program Press and release the button labeled 3 Display will scroll Menu Item 3 To set the oven for calibration simply press and hold the button with the arrow pointing up up arrow After about 5 seconds the display will change to read the correct temperature set point and the light next to the button number will become solid rather than flashing If the up arrow button is not released the set point will begin to go up unless it is already at maximum value Use the up down arrows to adjust this set point to 650 Next press and release button 3 to bring up the belt speed set point The light on this button should now be solid to indicate that this option is currently active Adjust the up down arrows
27. to read 4 00 Press and release button 2 and the light by this button will come on Use up down arrows to change this setting to 0 zero Above the numbered button are 5 labeled lights the two on the far right indicate the state of the IRs The light above the Top IR should be off Last press button 4 to set the lower IRs The light on the bottom will turn on and lights above the label Bottom will show the status of the lower IRs The display will show a number between 0 and 7 Use the arrow button to adjust this value to 0 The lights above the label Bottom will change to indicate which IRs are on and which are off After properly DTF 1960 Series Service Manual 15 setting oven for calibration do not press any buttons and the control will return to heat up mode automatically after about 10 seconds Allow oven to heat up Light on button number 8 should flash until oven is up to temp set point then light will become solid and oven will begin to cycle Check the temperature being recorded in the oven cavity This temperature should be within 5 F of 650 If temp is below 645 F or above 655 F then the probe offset must be adjusted The equation to be used for adjusting the offset is as follows Change in Probe Offset Cavity Temp Display Temp Examples of adjusting the offset If the Cavity Temp is 550 F and the Probe offset is 0 with the display temp set at 575 F then the Probe Off
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