1. DL manuals
  2. Lang
  3. Convection Oven
  4. ECCO-AP
  5. Service Manual

Lang ECCO-AP Service Manual

Other manuals for ECCO-AP: Installation Operation & Maintenance

Summary of ECCO-AP

  • Page 1

    Lang manufacturing company 6500 merrill creek parkway everett, wa 98203 phone: 1-800-224-5264 fax: 1-425-349-2733 www.Langworld.Com ©copyright 2000 service manual for the lang models: ecco-ap, ecco-c, ecco-pp, ecco-pt, ecco-sii, ecco-t.

  • Page 2: Table Of Contents

    1 table of contents chapter page 1. Table of contents....................................................................... 1 2. Read first ....................................................................................... 2 3. Equipment description ...............................................

  • Page 3

    2 important read first important caution: each unit weighs 430 lbs. For safe handling, installer should obtain help as needed, or employ appropriate materials handling equipment (such as a forklift, dolly, or pallet jack) to remove the unit from the skid and move it to the place of installation. Cau...

  • Page 4

    3 important read first important warning: keep water and solutions out of controls. Never spray or hose control console, electrical connections, etc. Caution: most cleaners are harmful to the skin, eyes, mucous membranes and clothing. Precautions should be taken to wear rubber gloves, goggles or fac...

  • Page 5: Equipment Description

    4 equipment description lang model: ecco electric full size convention oven exterior • the oven exterior dimensions are 40” (100 cm) wide, 27” (67.5 cm) high, 38” (95 cm) deep. The top, front, back, and sides are constructed of stainless steel with an aluminized bottom. • the oven doors come standar...

  • Page 6

    5 equipment description cont’d • ecco-pt ! Icon-driven (touch) panel allows for easy operation, also includes a manual override system. ! Day-part memory capabilities allow operators to “recall” the last daily selections automatically. ! Programmable up to 99 products, advanced baking capabilities i...

  • Page 7: Installation

    6 installation receiving the oven upon receipt, check for freight damage, both visible and concealed. Visible damage should be noted on the freight bill at the time of delivery and signed by the carrier's agent. Concealed loss or damage means loss or damage, which does not become apparent until the ...

  • Page 8: Start-Ups

    7 start-ups ecco-ap / ecco-c / ecco-pp / ecco-pt / ecco-sii / ecco-t convection oven start-up 1) verify connections at plug and terminal block 2) incoming volt - single phase l1-l2______ three phase l1-l2______ l2-l3______ l3-l1______ 3) amp draw l1______ l2______ l3______ 4) motor amp draw ______ 5...

  • Page 9: Control Panel Ecco-Ap

    8 control panel ecco-ap.

  • Page 10: Control Panel Layout Ecco-C

    9 control panel layout ecco-c.

  • Page 11

    10 control panel layout ecco-pp.

  • Page 12

    11 control panel layout ecco-pt when scrolling through menus, this key will take you to the previous screen. When programming, this key will advance you to the next step. Moves up through the alphabet, numerals and icons. Moves down through the alphabet, numerals and icons. Inspection light feature....

  • Page 13: Control Panel Ecco-Sii

    12 control panel ecco-sii.

  • Page 14: Control Panel Ecco-T

    13 control panel ecco-t.

  • Page 15: Programming Terms

    14 programming terms control panel buttons 1 -0 product buttons. These are the buttons where the product programs are stored. Pressing a product button will heat the oven to the programmed temperature. A - e shelf buttons. The control is capable of timing each shelf individually. Pressing a product ...

  • Page 16: Programming Terms Cont’D

    15 programming terms cont’d fan function the convection fan has two programmable options. Fan on (fan 1) runs the convection fan continuously. Fan off (fan 0) leaves the fan off until heat is called for by the control. In a convection oven, the fan must come on whenever the heat comes on. The convec...

  • Page 17: Programming Ecco-C

    16 programming ecco-c programming made easy the lang purple oven single tier programs note: make sure the oven is on. There are 3 steps to programming the lang purple oven: 1) use the “password” to enter the programming mode, 2) programming, and 3) exiting the programming mode. Entering the program ...

  • Page 18: Programming Ecco-C Cont’D

    17 programming ecco-c cont’d ecco-c programming codes below are codes, which will allow you to configure the display or aid in the operation, and troubleshooting of the oven. The readout must display "enter" before the computer will accept any programming code. If the readout displays any other word...

  • Page 19: Programming Ecco-Pp

    18 programming ecco-pp action display turn the power switch on. If the oven is already on, press the read / clear key until the following screen is displayed. Select product or read/clear to program xx:xxpm xxxf enter access code “1 6 2 7 3 8”. A: set time b: set date c: program products d: next men...

  • Page 20: Programming Ecco-Pt

    19 programming ecco-pt step 1 press the button to turn oven “on ” step 2 select time/date/program step 3 select program computer step 4 enter access code abcdef is the code. Press the up & down arrow keys to scroll through letters and numbers, then press ‘enter’ to move the cursor to the right. Exam...

  • Page 21

    20 programming ecco-pt cont’d step 5 select program products step 6 select create new product step 7 “select product icon” is the first screen when entering a product program. Scroll down until you find an icon that best resembles your product. Scroll up to go backward through the icon list. Press ‘...

  • Page 22

    21 programming ecco-pt cont’d step 8 “select product name” is where you spell the name using the up and down arrows to select each letter. Then press ‘enter’ to move the cursor to the next space and a new letter. Note: _unconfigured is the name that must be replaced with your product’s name or blank...

  • Page 23

    22 programming ecco-pt cont’d step 10 “select tier cook time” time is entered in hours:minutes:seconds. The maximum is 12:59:59. Press ‘enter’ to advance cursor to the place you want to enter a number. Example: 45minutes: 00 seconds press ‘enter’ twice to advance from hours to minutes, then press th...

  • Page 24

    23 programming ecco-pt cont’d step 12 “select fan speed” the cursor will automatically appear on high, that is your default. Press ‘enter’ to keep high fan and advance the screen, or press either the up or down arrow to move the cursor to low. Press ‘enter’ to advance to the next screen. Step 13 “se...

  • Page 25

    24 programming ecco-pt cont’d step 14 “correct”? The cursor automatically appears on yes. The computer is asking if the program displayed is what you thought you entered. If any part of that program is incorrect, press either the up or down arrows to move the cursor to no. Press ‘enter’ when the cur...

  • Page 26

    25 programming ecco-pt cont’d step 16 after programming the last tier, select no when asked “continue to next tier”? The computer will automatically advance the screen to program more products. If no other products need to be programmed, press ‘cancel’ three times to advance screen to the beginning....

  • Page 27: General

    26 general operations ! Convection ovens constantly circulate air over the product. This strips away the thin layer of moisture and cool air from the top of the product. Heat penetrates more quickly. Cooking times are shortened and cooking temperatures are usually reduced. ! To convert standard deck...

  • Page 28: General Cont’D

    27 general cont’d one pan two pan three pan four pan five pan.

  • Page 29: Typical Operation

    28 typical operation ecco-c status display the status display informs the operator of the oven's status. It can be used as a countdown timer, shelf in use or internal oven temperature display during the cooking cycle (see ecco-c programming codes pg. 16). The display informs the operator when the ov...

  • Page 30: Typical Operation Cont’D

    29 typical operation cont’d ecco-c typical operation sequence action result turn power switch to on. Control panel comes on, display says “88888 88888 88888 88888” and then “enter enter enter enter”, motor starts. Press a product button. Display says “preht preht preht preht” (preheat), oven begins ...

  • Page 31: Typical Operation Cont’D

    30 typical operation cont’d ecco-pp typical operation sequence action result turn power switch to on. Control panel comes on, display says “select product or read/clear to program. Press a product button. Display says “product x preheating to xxx f”. Motor starts and oven begins preheating to the pr...

  • Page 32: Typical Operation Cont’D

    31 typical operation cont’d ecco-t typical operation sequence action result turn power switch to on. Adjust proper temperature, between 140 & 450 degrees and allow to preheat up to 20 minutes. Oven begins heating. Open oven doors and insert product, set timer up to 60 minutes. Timer begins counting ...

  • Page 33

    32 sequence of operation ecco-ap power switch turned on. 240/208 vac across common terminals on power switch and “b” terminal of 12 pin terminal block. 240/208 vac to common terminals of motor relay. 240/24-volt transformer energized. 24 vac across “c” and “d” (common) of 24 pin terminal block. 24 v...

  • Page 34

    33 sequence of operation ecco-c power switch turned on. 240/208 vac across common terminals on power switch and “a” terminal of 24 pin. Terminal block. 240/208 vac across any “a” and “b” terminal of 24 pin terminal block. 240/208 vac to common terminals of motor relay. 240/208 vac across common term...

  • Page 35

    34 sequence of operation ecco-pp/pt oven plugged in. 208/240 vac across any “a” and “b” terminal on the terminal block. 208/240 vac to control transformer (208-240vac / 24-12 vac) and component transformer 240vac / 24vac. Transformers energize. 24 vac to any “c” and “d” terminal on the terminal bloc...

  • Page 36

    35 sequence of operation ecco-sii power switch turned on. 240/208 vac across common terminals on power switch and “b” terminal of 12 pin terminal block (through fuses). 240/208 vac to common terminals of motor relay. 240/24-volt transformer energized. 24 vac across “c” and “d” (common) of 24 pin ter...

  • Page 37: Troubleshooting Ecco-Ap

    36 troubleshooting ecco-ap hint: confirm that all circuit breakers are in the “on” position. No motor probable cause corrective action defective fan switch ! Verify that fan switch is in “on” position (in pulse position motor will only cycle when oven calls for heat). Defective fuses ! Check fuses f...

  • Page 38: Troubleshooting Ecco-C

    37 troubleshooting ecco-c ! To help troubleshoot the oven you should perform the following “manual override” test: ! Open drop down door located on the lower right side, directly below front panel. ! Turn back up toggle (on/off) switch to “on” position. ! Turn main power switch to “on” position. ! C...

  • Page 39

    38 troubleshooting ecco-c cont’d probable cause corrective action defective control transformer (12 vac). ! Check transformer for normal operation. Note: unplug secondary side of control transformer from cpu before performing any tests. Caution: turn unit off before checking any resistance. ! Check ...

  • Page 40

    39 troubleshooting ecco-c cont’d no fan-manual mode probable cause corrective action defective 240/24 vac transformer ! Check for 24 vac on “c” and “d” of the terminal block. If 24 vac is not measured: turn off and: ! Check secondary coil for 1 Ω . ! Check primary coil for 77 Ω . ! Replace transform...

  • Page 41

    40 troubleshooting ecco-c cont’d probable cause corrective action no voltage across contactor points ! Check 208/240 vac across “c” terminals of contactor. If 208/240 vac is not measured: ! Check connection to main contactor (heat contactor). ! Check circuit breaker. If 208/240 vac is measured: ! Ch...

  • Page 42

    41 troubleshooting ecco-c cont’d no heat manual mode note: fan must be operating before trouble shooting no heat. Probable cause corrective action back-up relay not energizing ! Check for 240 vac on relay coil. If 240 vac is measured. Turn unit off and: ! Check back-up relay coil for 7.2 Ω . ! Check...

  • Page 43

    42 troubleshooting ecco-c cont’d probable cause corrective action defective over-temp thermostat ! Check for 24 vac on #55 red wire to common “d”. If 24 vac is not measured: turn oven off and: ! Check for continuity through over-temp thermostat. ! Replace if defective. No heat computer mode probable...

  • Page 44

    43 troubleshooting ecco-c cont’d probable cause corrective action “88888” stuck in display ! Check for stuck button by pressing any button. If computer beeps or chirps: ! Check control panel transformer (12 vac) for proper operation. ! Check tp1 for at least 10.5 vac. ! Check tp2 for at least 4.99 v...

  • Page 45

    44 troubleshooting ecco-pp, ecco-pt no motor in computer mode note: in computer mode, the motor runs only when a product button has been selected. In thermostat mode the motor runs all the time, even when the door is open. Probable cause corrective action no motor in computer mode ! Verify product b...

  • Page 46

    45 troubleshooting ecco-pp, ecco-pt cont’d probable cause corrective action no display ! Verify voltage at computer transformer. ! Verify 12 vac across yellow – yellow w/ red stripe. ! Verify 24 vac across yellow – yellow. ! Verify transformer connections at cpu. ! If voltage is present replace cpu....

  • Page 47: Troubleshooting Ecco-Sii

    46 troubleshooting ecco-sii hint: confirm that all circuit breakers are in the “on” position. No motor complaint corrective action defective fan switch ! Verify that fan switch is in “on” position (in pulse position motor will only cycle when oven calls for heat). Defective fuses ! Check fuses for n...

  • Page 48

    47 troubleshooting ecco-sii cont’d probable cause corrective action defective circuit board ! Confirm that heat call light is on. If no light is detected: ! Check 12-position switch for normal operation. (see technical data) if light is detected: ! Check for 24vac across heat output and “d” on 12 po...

  • Page 49: Technical Data

    48 technical data element resistance ! 208 volt 16 Ω ! 480 volt 60 Ω transformer resistance transformer input primary secondary output ! 208/24 volt 208/240 volt 77 Ω 1 Ω 24 volt ! 240/12 volt 208/240 volt 630 Ω 1 Ω 12 volt ! 208/240-24/12 208/240 volt 208volts 64 Ω 240volts 75 Ω 12volts .6 Ω 24volt...

  • Page 50: Technical Data Cont’D

    49 technical data cont’d auto/bypass switch the auto / bypass and energy switch are located below the controls behind a pull down access panel. • auto/bypass switch normally in “off”. The “on” position will interrupt power to the computer and allow use of the back-up thermostat. • energy switch norm...

  • Page 51

    50 ecco–pt / pp cooking curve conversion o l d s t y l e p u r p l e n e w s t y l e p l a t i n u m / p u r p l e p l u s 0 0% 1 17% 2 26% 3 40% 4 50% 5 56% 6 63% 7 71%.

  • Page 52: Technical Data Cont’D

    51 technical data cont’d probe resistance temp resistance volt drop temp resistance volt drop 70 ° 556 Ω 1.11 290 ° 881 Ω 1.76 80 ° 569 Ω 1.14 300 ° 897 Ω 1.79 90 ° 583 Ω 1.17 310 ° 914 Ω 1.83 100 ° 596 Ω 1.19 320 ° 931 Ω 1.86 110 ° 610 Ω 1.22 330 ° 948 Ω 1.90 120 ° 623 Ω 1.25 340 ° 965 Ω 1.93 130 °...

  • Page 53: Technical Data Cont’D

    52 technical data cont’d ecco-c model strapping the front control panel of the lang “purple” computer must be configured to match the model of oven it is being installed in. To configure the front control panel, you must change the arrangement of the strapping bars located at the bottom of the circu...

  • Page 54: Technical Data Cont’D

    53 technical data cont’d ecco-c test point layout tp 2 tp 1 tp 3 tp 4 tp5 tp6 tp7.

  • Page 55

    55 wiring diagram ecco-ap 208/240

  • Page 56

    56 wiring diagram ecco-ap 480

  • Page 57

    57 wiring diagram ecco-c 208/240

  • Page 58

    58 wiring diagram ecco-c 480

  • Page 59

    59 wiring diagram ecco-pp 208/240

  • Page 60

    60 wiring diagram ecco-pp 480

  • Page 61

    61 wiring diagram ecco-pt 208/240

  • Page 62

    62 wiring diagram ecco-pt 480

  • Page 63

    63 wiring diagram ecco-sii 208/240

  • Page 64

    64 wiring diagram ecco-sii 480

  • Page 65

    65 wireing diagram ecco-t 208/240

  • Page 66

    66 wireing diagram ecco-t 480

  • Page 67: Ecco-Ap

    67 ecco-ap electric accu-plus convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 11090-18 motor 1/3 hp 480 volt 2 speed 30200-16 motor 1/3 hp 208/240 volt 2 speed 30200-17 micro switch, oven door 30301-02 switch, toggle, on-on 30...

  • Page 68: Ecco-C

    68 ecco-c electric computerized convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 watts 11090-18 motor 1/3 hp 480 volt 30200-03 motor 1/3 hp 115/208/240 volt 30200-12 motor 1/3 hp 480 volt 2 speed (after serial v-90436) 30200-16...

  • Page 69: Ecco-C

    69 ecco-c electric computerized convection oven description part no. Suppressor low voltage 24 pole terminal block 40705-10 suppressor hi voltage 24 pole terminal block 40705-11 probe temperature sensor 41100-08 door handle 11 1/2” long black “t” style (double handle ovens) 50800-12 door handle brac...

  • Page 70: Ecco-Pp

    70 ecco-pp electric computerized convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 watts 11090-18 motor 1/3 hp 480 volt 2 speed 30200-16 motor 1/3 hp 208/240 volt 2 speed 30200-17 switch micro convection oven door 30301-02 switc...

  • Page 71: Ecco-Pt

    71 ecco-pt electric computerized convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 watts 11090-18 motor 1/3 hp 480 volt 2 speed 30200-16 motor 1/3 hp 208/240 volt 2 speed 30200-17 switch micro convection oven door 30301-02 switc...

  • Page 72: Ecco-Sii

    72 ecco-sii electric selectronic convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 watts 11090-18 motor 1/3 hp 480 volt (before f-79818 no pulse fan, before h-90435 with pulse fan) 30200-03 motor 1/3 hp 115/208/240 volt (before ...

  • Page 73: Ecco-T

    73 ecco-t electric accu-temp convection oven description part no. Element ecco oven 208/240 volt 11000 watts 11090-16 element ecco oven 480 volt 11000 watts 11090-18 element ecco oven 380 volt 11000 watts 11090-30 motor 1/3 hp 480 volt (before f-90435) 30200-03 motor 1/3 hp 115/208/240 volt (before ...