Lang ECCO-PP Owner's manual

Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203
Rev. B Phone: [phone] Fax: [phone]
Part # 60800-42 WWW.LANGWORLD.COM © Copyright 2001
Installation, Operation, & Maintenance
Model: ECCO-PP, Electric Full Size Convection Oven

2
THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE.
READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND
WARNINGS CONTAINED IN THIS MANUAL.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY
OTHER APPLIANCE.
POST IN A PROMINENT LOCATION
INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER
SMELLS GAS. THIS INFORMATION SHALL BE OBTAINED BY
CONSULTING YOUR LOCAL GAS SUPPLIER. AS A MINIMUM,
TURN OFF THE GAS AND CALL YOUR GAS COMPANY AND
YOUR AUTHORIZED SERVICE AGENT. EVACUATE ALL
PERSONNEL FROM THE AREA.
WARNING: IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE
PROPERTY DAMAGE, INJURY OR DEATH. READ THE
INSTALLATION, OPERATING AND MAINTENANCE
INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR
SERVICING THIS EQUIPMENT.
Model #: Purchased From:
Serial #: Location:
Date Purchased: Date Installed:
Purchase Order #: For Service, Call:

3
TABLE OF CONTENTS
CHAPTER PAGE
TABLE OF CONTENTS....................................................................................... 3
READ FIRST......................................................................................................... 4
EQUIPMENT DESCRIPTION ............................................................................. 6
UNPACKING........................................................................................................ 7
INSTALLATION .................................................................................................. 8
INITIAL START-UP............................................................................................. 11
OPERATION......................................................................................................... 12
MAINTENANCE & CLEANING PROCEDURES............................................. 16
TROUBLE SHOOTING........................................................................................ 17
PARTS LIST ......................................................................................................... 19
WIRING DIAGRAM ............................................................................................ 20
WARRANTY ........................................................................................................ 22

4
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.
CAUTION: ANY STAND, COUNTER OR OTHER DEVICE ON
WHICH OVEN WILL BE LOCATED MUST BE
DESIGNED TO SUPPORT THE WEIGHT OF THE
OVEN.
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN
SNAP BACK WHEN CUT.
DANGER: THIS APPLIANCE MUST BE GROUNDED AT THE
TERMINAL PROVIDED. FAILURE TO GROUND THE
APPLIANCE COULD RESULT IN ELECTROCUTION
AND DEATH.
WARNING: INSTALLATION OF THE UNIT MUST BE DONE BY
PERSONNEL QUALIFIED TO WORK WITH
ELECTRICITY AND PLUMBING. IMPROPER
INSTALLATION CAN CAUSE INJURY TO
PERSONNEL AND/OR DAMAGE TO EQUIPMENT.
UNIT MUST BE INSTALLED IN ACCORDANCE WITH
ALL APPLICABLE CODES.
NOTICE: The data plate is located above control panel behind
wire mesh screen. The oven voltage, wattage, serial
number, wire size, and clearance specifications are
on the data plate. This information should be
carefully read and understood before proceeding
with the installation.
NOTICE: The installation of any components such as a vent
hood, grease extractors, fire extinguisher systems,
must conform to their applicable National, State and
locally recognized installation standards.
NOTICE: During the first few hours of operation you may
notice a small amount of smoke coming off the oven,
and a faint odor from the smoke. This is normal for a
new oven and will disappear after the first few hours
of use.
CAUTION: ALWAYS KEEP THE AREA NEAR THE APPLIANCE
FREE FROM COMBUSTIBLE MATERIALS.
CAUTION: KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN
AND DRY. IF SPILLS OCCUR, CLEAN IMMEDIATELY,
TO AVOID THE DANGER OF SLIPS OR FALLS.

5
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 FACE SHIELD AND
PROTECTIVE CLOTHING. CAREFULLY READ THE
WARNING AND FOLLOW THE DIRECTIONS ON THE
LABEL OF THE CLEANER TO BE USED.
NOTICE: Never leave a chlorine sanitizer in contact with stainless
steel surfaces longer than 10 minutes. Longer contact
can cause corrosion.
NOTICE: Service on this, or any other, LANG appliance must be
performed by qualified personnel only. Consult your
authorized service station directory or call the factory at
1-800-224-LANG (5264), or WWW.LANGWORLD.COM for
the service station nearest you.
WARNING: BOTH HIGH AND LOW VOLTAGES ARE PRESENT
INSIDE THIS APPLIANCE WHEN THE UNIT IS
PLUGGED/WIRED INTO A LIVE RECEPTACLE. BEFORE
REPLACING ANY PARTS, DISCONNECT THE UNIT
FROM THE ELECTRIC POWER SUPPLY.
CAUTION: USE OF ANY REPLACEMENT PARTS OTHER THAN
THOSE SUPPLIED BY LANG OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.

6
EQUIPMENT DESCRIPTION
Lang Model: Lang Model: ECCO-PP
Exterior Construction
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 standard with double pane windows.
The door handle is constructed of Stainless Steel and Phonolic Tubing.
The oven cavity is insulated with high temperature insulation for efficiency and
reduced heat loss.
Interior Construction
The oven cavity dimensions are 29” (72.5 cm) Wide, 20” (50.84 cm) High, 21”
(53.38 cm) Deep.
The interior of the oven is constructed of porcelainized stainless steel.
Operation
The ECCO-PP oven is a forced air convection oven with a vented oven cavity.
The air is driven by a 1/3 HP fan motor.
Controls
Complete computerized controls.
Pre-Programmable product selections.
Independent shelf timers for each shelf.
Load control through use of Cooking Curves.
Shelf compensation for uniform baking.
Solid state temperature sensing and controls.
Dual speed fan.
Manual override controls.
Technical
The ECCO-PP oven operates on either 208/240V or 480V. This must be specified
when ordering.
Floor space required is 48” (122.6 cm) wide, 44” (112.5 cm) deep.
The oven weighs 430 lbs.

7
UNPACKING
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 merchandise has been unpacked. If concealed loss or
damage is discovered upon unpacking, make a written request for inspection by the
carrier's agent within 15 days of delivery. All packing material should be kept for
inspection. Do not return damaged merchandise to Lang Manufacturing
Company. File your claim with the carrier.
Location
Prior to un-crating, move the oven as near to its intended location as practical. The
crating will help protect the unit from the physical damage normally associated
with moving it through hallways and doorways.
Un-crating
The oven will arrive completely assembled inside a wood frame and strapped to a
skid. Cut the straps and remove the wood frame.
CAUTION: THE OVEN 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.
CAUTION: ANY STAND, COUNTER OR OTHER DEVICE ON WHICH
THE OVEN WILL BE LOCATED MUST BE DESIGNED
TO SUPPORT THE WEIGHT OF THE OVEN.
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN
SNAP BACK WHEN CUT.
Remove Oven from skid and place in intended location.

8
INSTALLATION
DANGER: THIS APPLIANCE MUST BE GROUNDED AT THE
TERMINAL PROVIDED. FAILURE TO GROUND THE
APPLIANCE COULD RESULT IN ELECTROCUTION
AND DEATH.
WARNING: INSTALLATION OF THE UNIT MUST BE DONE BY
PERSONNEL QUALIFIED TO WORK WITH
ELECTRICITY AND PLUMBING. IMPROPER
INSTALLATION CAN CAUSE INJURY TO PERSONNEL
AND/OR DAMAGE TO EQUIPMENT. UNIT MUST BE
INSTALLED IN ACCORDANCE WITH ALL APPLICABLE
CODES.
NOTICE: The data plate is located above control panel behind
wire mesh screen. The oven voltage, wattage, serial
number, wire size, and clearance specifications are on
the data plate. This information should be carefully
read and understood before proceeding with the
installation.
NOTICE: The installation of any components such as a vent
hood, grease extractors, fire extinguisher systems,
must conform to their applicable National, State and
locally recognized installation standards.
Leg Installation
Legs are available for both the single and double deck installations. Single deck
installations require a 27-inch leg. Double deck installations require 6-inch legs or
casters.
To install the 27-inch legs, place some cardboard on the floor and gently tip the
oven onto its back. Fasten two legs to the oven's front corners using the four 5/16
inch bolts provided in the leg kit. Lift the oven onto its front legs and block the
back up using one of the 27-inch legs set upside down in the center rear of the oven
body. Install the last 27-inch leg onto the oven body on the control side rear.
Gently lift the oven rear, remove the leg set to support the oven center and install it
on the last rear corner.
To install the 6-inch legs or casters, follow the instructions in the Leg Pad section
on the following pages or in the Leg Pad box supplied with the oven.
The adjustable feet on the bottom of each leg may be screwed in or out as
necessary to level the oven.
A torpedo level placed on an oven rack will assist in leveling the oven.
Stacking the Ovens
Remove all the plug buttons from the top of the lower oven.
Remove the stacking kit from the oven compartment of one oven and install the 1
1/4-inch plastic bushing into the top of the lower oven.
Tip the top oven backwards and install two 3/8-inch socket head bolts, found in the
stacking kit, into the two front leg holes that match the holes in the top of the lower
oven. Install the socket head bolts with the heads of the bolt pointing away from
the oven.
Lift the top oven and gently set on top of the lower oven so that the heads of the
socket head bolts nest into the holes in the top of the lower oven.

9
INSTALLATION CONT’D
Leg Pad Adapter
Identify the front and rear leg adapters (the front adapters have two threaded inserts, the
rear has four).
Leg to Adapter Installation:
Install the leg’s threaded stud through the hole in the adapter labeled “C” with the bent
flange of the adapter facing away from the leg.
Screw the 3/4-inch nut supplied in the adapter kit onto the leg stud and tighten.
Caster to Adapter Installation:
Place the swivel caster against the front leg adapter with the flange of the adapter facing
away from the caster.
Install the four 5/16 inch bolts through the caster base and the adapter holes labeled “A”
then install the 5/16 inch nuts with washer and lock washers.
Place the rigid casters against the rear leg adapter with the flange of the adapter facing
away from the caster.
Align the caster to the holes in the adapter labeled “B”. NOTE: There are two sets of
“B” holes set at 90°from the each other. One set will create a left rear adapter and the
other set will create a right rear adapter.
Install four 5/16-inch bolts through the caster base and the adapter holes labeled “B” then
install 5/16-inch nuts with lock washers and flat washers.
Adapter to Oven Installation:
Gently tip the oven onto its back. Place the front leg adapter into the front corers of the
oven. The holes without the threaded inserts face the front of the oven and the flange on
the adapter points toward the bottom of the oven.
The edge of the leg adapter with the threaded insert slips under the flange on the oven
side, while the edge without the inserts sits on top of the threaded angle on the oven
front.
Install two 3/8-inch bolts with lock washers and flat washers through the front holes “D”
in the leg adapter and into the threaded inserts on the oven.
Thread one 3/8-inch bolt with lock washer and flat washer into the rear threaded hole
labeled “E” on each of the leg adapters.
The forward threaded hole on the front leg adapter does not get a bolt installed.
Place the rear leg adapters into the rear corners of the oven so that the adapter is under
the flange of the oven side and back. NOTE: If installing a caster place the adapter on
the oven so that the casters roll forward.
Install for 3/8-inch bolts with lock washers and flat washers through the holes labeled
“E” in the flange of the oven and into the threaded inserts of the leg adapter.

10
INSTALLATION CONT’D
Ventilation and Clearances
Standard minimum clearance from combustible construction is as follows.
4” from side
4” from back
6” from floor
These ovens may be set directly, without legs, on a curbed base or non-combustible
floor.
If the oven is set without legs on a non-combustible floor or a curbed base, maintain a
4-inch back clearance.
If the oven is set directly against a non-combustible back wall, maintain a 6-inch
clearance to the floor.
Do not install the oven closer than 4 inches from another oven on the right hand side
(control panel side).
Do not install the oven closer than 12 inches from an uncontrolled heat source (char
broiler etc.) on the right side.
Keep the appliance area free and clear of combustible material and do not obstruct the
flow of combustion or ventilation air.
The installation of any components such as a vent hood, grease extractors, and/or fire
extinguisher systems, must conform to the there applicable nationally recognized
installation standards.
Electrical Connection
The electrical service entrance is provided by a 1 1/4-inch knockout in the bottom right
front corner of each oven, or at the oven back directly behind the control compartment.
Grounding lugs are provided at both the front and rear service entrances.
The 208/240-volt oven is a dual voltage oven and is shipped from the factory as 208-
volt. The oven must be field converted to operate on a 240-volt power supply.
To convert the oven to 240-volt, remove the panel above the power supply knock out
at the back of the oven and toggle the switch to the 240-volt position.
With 480-volt installations check to be sure that the motor rotates in a clockwise
direction as viewed from the front of the oven.
To reverse the motor rotation, switch any two incoming power supply leads and
recheck the rotation.
Supply wire size must be large enough to carry the amperage load for the number of
ovens being installed. Wire size information can be found on the oven DATA
PLATE.
This oven can be installed on both single and three-phase supplies and is shipped from
the factory for three-phase.
To phase the oven to match the power supply, follow the charts on the Wiring
Diagram located at the back of the Manual.

11
INITIAL START UP
Pre-Power On
After the oven is installed and connected to power, prior to turning on, verify the
following:
•The doors open and close freely.
•All racks are in the oven correctly.
•All packing materials have been removed from the inside of the oven.
Power On
Once oven has been turned on verify that the blower wheel is spinning freely in a
clockwise position and that the elements are heating properly.
NOTICE: During the first few hours of operation you may notice
a small amount of smoke coming off the oven, and a
faint odor from the smoke. This is normal for a new
oven and will disappear after the first few hours of use.

12
OPERATION
Control Panel
Power switch.
Light switch. Inspection light only.
Push toggle switch to the up
position to inspect product. Switch
will automatically return to the off
position.
AlphaNumeric Display.
Shelf Select Button. Press
to select shelf which
product will be placed.
Product Select Button.
Press to select desired
product.
Manual Program Button.
Use when product being
cooked is for one time only.
Read/Clear Button. Used
to read programs, clear
programs, and to access
program menu.
LIGHTS
POWER
On
Off
On
Off
1
2
3
4
50
9
8
7
6A
B
C
D
E
Man
Prog
Read
Clear

13
OPERATION CONT’D
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 programmed temperature.
Beeper sounds briefly. Display says “READY SELECT PRODUCT
TO START ”.
Open the oven doors and load the product.
Close the door and press the product button
again.
Beeper sounds briefly and display says
“SELECT OVEN SHELVES PRODUCT
X”.
Press the shelf button(s) which correspond to
the shelf positions, which the product is loaded
(A equals the top shelf and E equals the bottom
shelf).
Display shows a countdown timer and begins to
count toward zero.
Beeper sounds continuously. Display shows “DONE PRESS SHELF
BUTTON X, REMOVE PRODUCT”, shelf
button(s) flash.
Press the flashing shelf button(s). Beeper stops. Display shows “READY
SELECT PRODUCT TO START” if no
other shelves carry product or resume count
down for shelves that still have product
cooking.
Open oven door and remove the product, which
corresponds to flashing shelf button(s).

Operation cont'd.
15
ENTER PASSWORD
OR READ/CLEAR
TO DISPLAY PRODUCT
A. SET TIME
B. SET DATE
C. PROGRAM
PRODUCTS
D. NEXT MENU
P
RODUCT PROGRAM MODE
SELECT PRODUCT
NUMBER 0-9
ENTER COOKING TEMP
100 TO 450F
NOX T1 XXXF
ENTER COOKING TIME
HR:MIN:SEC
NOX T1 XXXF C XX
Programming
Prior to programming new ovens, you must program at least one button (position 2 through 0)
before you can delete or replace the sample program in position one. If you are programming
an oven after replacement of the computer board, or blanking the EPROM, you must first
complete the "CPU" startup procedures that provided with the new computer board. This
must be accomplished prior to programming the product buttons. Identify the oven being
used and answer NO to the questions regarding Steam, Rack Rotation, and 650OF maximum
temperature.
In order to prepare the programming of your Purple Plus oven, you must determine the
cooking parameters you will be using for each product to be programmed. The following table
is an example to follow:
Procedure
1. With the oven ON, press the R/C (Read/Clear) button until the
display screen appears.
2. Enter new password using corresponding product select
buttons. (Default password is 1, 6, 2, 7, 3, 8). The display screen
will appear.
3. Press the "C" button to program products. See programming
manual to set time and date.
4. Press the Select Product button in which you wish to install a
program (0-9).
NOTE
If a program already exists, you will see a screen asking
"Edit Product?" Choose "2" for delete and begin
programming sequence again from Step 3. If you did
select "1" for Edit, the information on line 3 will reflect the
existing program settings from this point forward.
5. Enter the desired cooking/baking temperature and then press the
"E" button to continue.
6. Enter the cooking time.
Tier 1
Product
Name Cooking
Temp Cooking Time Cooking Curve Fan Speed Pulse Rate
Biscuits 325OF 12:30 50% HI 100%

Operation cont'd.
16
ENTER COOKING CURVE
0 TO 100%
NOX T1 XXXF C XX
XX:XX:XX PXXX FX
ENTER FAN SPEED
1=HI 2=LOW
NOX T1 XXXF C XX
XX:XX:XX PXXX FX
ENTER FAN PULSE RATE
1=HI 2=LOW
NOX T1 XXXF C XX
XX:XX:XX PXXX FX
CONTINUE TO TIER 2
1=YES 2=NO
NOX T1 XXXF C XX
XX:XX:XX PXXX FX
SELECT PRODUCT OR
READ/CLEAR TO
PROGRAM
XX: XX: PM XXX FX
A. SET TIME
B. SET DATE
C. PROGRAM PRODUCTS
D. NEXT MENU
NOTE
If you do not fill all available characters (i.e. xx: 20:30) the
light on the "E" button will flash and you will need to press
the "E" button to continue to the next screen.
7. Enter the desired cooking curve percentage (i.e. 040 = 40% 050 =
50%.
NOTE
If you do not fill all available characters (i.e. xx: 20:30) the light
on the "E" button will flash and you will need to press the "E"
button to continue to the next screen.
8. Enter either "1" for HI or "2" for low.
NOTE
If you do not fill all available characters (i.e. xx: 20:30) the light
on the "E" button will flash and you will need to press the "E"
button to continue to the next screen.
9. Enter a number from 000 to 100.
NOTE
Any number that you enter between 000 and 100 will be the
amount of time in each one hundred second block that the
fan will be ON during the cooking cycle when heat is OFF.
The fan will always stay ON when the heat is ON.
10. Press button 2. This completes the single Tier programming for the
current product.
NOTE
If you press button 1 at this time, you will initiate Tiered
Programming. This will take you through the same sequence as
outlined above for the next Tier and the screen will display SET
TIME as shown.
To continue programming, start at step 3. If you have completed
your programming press, READ/CLEAR button until the display
shows SELECT PRODUCT.
To begin using your oven, press the appropriate product select
button. Refer to your operations manual for complete cooking
instructions.

14
OPERATION CONT’D
Hints & Suggestions
Convection ovens constantly circulate air over and around the product. This strips away the
thin layer of moisture and cool air from around the product allowing heat to penetrate more
quickly.
Cooking times can be shortened and cooking temperatures can be reduced.
To convert standard deck oven recipes, reduce the temperature 50 degrees and the time by
25%. Make minor adjustments as necessary.
The lower the oven temperature the more even the bake.
Always weigh your product. This will give you a more consistent size, color and quality.
Check the product near the end of the initial cooking cycle by turning on the oven light and
looking through the oven door windows.
Do not open the oven doors during baking as this will change the baking characteristics of the
oven and make it difficult to determine a final program.
If the product is overdone on the outside and underdone on the inside, reduce the baking
temperature.
If the product is pulling away from the edge of the pan, the temperature is too high or the
cooking time too long.
The convection is a mechanical piece of equipment. The same control settings will always
give the same results. If the results vary, problems may be because of product preparation.

15
OPERATION CONT’D
Loading
When loading and unloading the oven, stage products and racks so the oven doors are
opened for the least amount of time.
Be sure that racks are level within the oven.
Bent or warped pans can greatly affect the evenness of the cook or bake.
If using baker’s parchment, be sure the parchment does not blow over the product.
The will create a uneven bake.
Load each shelf evenly. Spaces should be maintained equally between the pan and
oven walls, front and back.
Do not overload pan’s this will create a uneven bake.
For best baking results, load the oven from the center out during random loading.
CAUTION: ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE
FROM COMBUSTIBLE MATERIALS.
CAUTION: KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND
DRY. IF SPILLS OCCUR, CLEAN IMMEDIATELY, TO
AVOID THE DANGER OF SLIPS OR FALLS.

16
MAINTENANCE & CLEANING
WARNING: KEEP WATER AND SOLUTIONS OUT OF CONTROLS.
NEVER SPRAY OR HOSE CONTROL CONSOLE.
CAUTION: MOST CLEANERS ARE HARMFUL TO THE SKIN,
EYES, MUCOUS MEMBRANES AND CLOTHING.
PRECAUTIONS SHOULD BE TAKEN TO WEAR
RUBBER GLOVES, GOGGLES OR FACE SHIELD AND
PROTECTIVE CLOTHING. CAREFULLY READ THE
WARNING AND FOLLOW THE DIRECTIONS ON THE
LABEL OF THE CLEANER TO BE USED.
NOTICE: Never leave a chlorine sanitizer in contact with
stainless steel surfaces longer than 10 minutes.
Longer contact can cause corrosion.
Cleaning
•Always start with a cold oven.
•The stainless exterior can easily be cleaned using Lang Mfg. Prime Shine (72804-
41) oven cleaner.
•Always follow the cleaner manufacturer's instructions when using any cleaner.
•Care should be taken to prevent caustic cleaning compounds from coming in
contact with the blower wheel.
•The oven racks, rack slides, and interior may be cleaned using Lang Mfg. Foam
Deluxe (72804-36) oven cleaner.
•Discoloration or heat tint may be removed using Lang Mfg. Carbon Release
(72804-32) oven cleaner.
•Always apply these cleaners when the oven is cold and rub in the direction of the
metal's grain.

17
TROUBLESHOOTING
Symptoms
What follows is a chart of Symptoms and Possible Causes to aid in diagnosing
faults with the oven.
Refer to the Symptoms column to locate the type of failure then to the Possible
Cause for the items to be checked.
To test for a possible causes refer to the TEST section and locate the Possible
Cause then refer to test to identify test procedures.
SYMPTOM POSSIBLE CAUSE
No Display •No power to cord outlet
•Oven unplugged from outlet
•Failed power cord or plug
•Failed power switch
•Contrast needs to be adjusted
•Failed display board
Oven will not heat •Power Switch is not “ON”
•Product has not been selected
•Failed Transformer
•Failed Probe
•Failed Circuit board
•Failed Contactor
•Failed Over-temperature Thermostat
•Failed Element
Oven motor will not run •Power Switch is not “ON”
•Product has not been selected
•Failed Transformer
•Failed Contactor
•Failed Motor
•Failed output on circuit board
Product burning •Product is cooked too long
•Failed Probe
•Failed Circuit board
Product under done •Product is not cooking long enough
•Failed Probe
•Failed Circuit board

18
TROUBLESHOOTING CONT’D
TESTS
NOTICE: Service on this, or any other, LANG appliance must be
performed by qualified personnel only. Consult your
authorized service station directory or call the factory
at 1-800-224-LANG (5264), or WWW.LANGWORLD.COM
For the service station nearest you.
WARNING: BOTH HIGH AND LOW VOLTAGES ARE PRESENT
INSIDE THIS APPLIANCE WHEN THE UNIT IS
PLUGGED/WIRED INTO A LIVE RECEPTACLE.
BEFORE REPLACING ANY PARTS, DISCONNECT THE
UNIT FROM THE ELECTRIC POWER SUPPLY.
If an item on the list is followed by an asterisk (*), the work should be done by a
factory authorized service representative.
Possible Cause TEST
Product is cooked too long •No test available, operational condition
Failed Probe •Check probe for proper resistance*
Failed Circuit board •Confirm that Circuit board is getting correct
voltage and putting out correct voltage*
Failed Transformer •Check both Primary and Secondary coils for
correct voltage*
Failed Contactor •Remove the wires from the contactor coil and
check for continuity across the contactor coil
connection*
•Ensure the contactor moveable points move
freely up and down*
Failed Motor •Confirm that motor is getting correct voltage*
Failed or disconnected safety
thermostat
•Check across the thermostat connectors for
continuity*
Failed Element •Confirm that Elements are getting correct
voltage and have continuity*
CAUTION: USE OF ANY REPLACEMENT PARTS OTHER THAN
THOSE SUPPLIED BY LANG OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.