XLT Ovens RD 9007 PS Quick start guide

XLT Ovens
PO Box 9090
Wichita, Kansas 67277
US: 888-443-2751 FAX: [phone] INTL: 316-943-2751 WEB: www.xltovens.com
XLT Radiant Oven
Parts & Service Manual
RD 9007A
SWA
08/01/2019
Current versions of this manual, Rough-In Specifications, Installation & Operation Manual, Architectural
Drawings, & a list of International Authorized Distributors are available at: www.xltovens.com
For use with the following XLT Radiant Oven Versions:
Standard (S) A
World (W) A
2000887
Read This Manual Before Using This Appliance.
Original Instructions

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2TABLE OF CONTENTS
Warning & Safety Information........................................................................................................... 3
General ...............................................................................................................................................6
Warranty.............................................................................................................................................8
Recommended Tool List ..................................................................................................................10
Installation Responsibilities ............................................................................................................. 11
Oven Theory of Operation ...............................................................................................................12
Oven Troubleshooting......................................................................................................................17
Oven Service Procedures.................................................................................................................. 20
Oven Parts ........................................................................................................................................22
Oven Schematics ..............................................................................................................................36
Notes................................................................................................................................................. 40
Revision History Table
Revision Comments Date
ANew Release 08/01/2019
Save this Manual
This document is the property of the owner of this equipment.
XLT reserves the right to make changes in design & specifications, and/or make additions
or improvements to its product without imposing any obligations upon itself to install them in
products previously manufactured.
All Right Hand & Left Hand designations in this manual are from the point of view as if
standing directly in front of the oven.
For maintenance procedures, please refer to the XLT Installation & Operation Manual.

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3
Definitions & Symbols
A safety instruction (message) includes a “Safety Alert Symbol” & a signal word or phrase
such as DANGER, WARNING or CAUTION. Each signal word has the following meaning:
WARNING & SAFETY INFORMATION
XLT has spent millions of dollars designing and testing our products as well as developing
Parts & Service Manuals. These manuals are the most complete and easiest to understand in the
industry. However, they are worthless if they are not followed.
We have witnessed store operators and building owners lose many thousands of dollars in
lost revenue due to incorrect installations. We highly recommend you follow all instructions given
in this manual as well as follow best practices in plumbing, electrical, and HVAC building codes.
IEC 60417-5036: This symbol indicates high voltage. It calls your attention to
items or operations that could be dangerous to you & other persons operating this
equipment. Read the message & follow the instructions carefully.
HIGH
VOLTAGE
ISO 7000-0434: Indicates a potentially hazardous situation that, if not avoided, can
result in serious injury or death.
DANGER
ISO 7000-0434: Indicates a potentially hazardous situation, that if not avoided, can
result in minor to moderate injury or serious damage to the product. The situation
described in the CAUTION may, if not avoided, lead to serious results. Important
safety measures are described in CAUTION (as well as WARNING), so be sure to
observe them.
CAUTION
ISO 7000-0434: Indicates a potentially hazardous situation, that if not avoided, can
result in minor to moderate injury or serious damage to the product. The situation
described in the CAUTION may, if not avoided, lead to serious results. Important
safety measures are described in CAUTION (as well as WARNING), so be sure to
observe them.
WARNING
ISO 7000-0790: Read the
instructions before using this
machine.
READ
MANUAL
IEC 60417-5172: A class II or
double insulated electrical
appliance.
CLASS II
EQUIPMENT
IEC 60417-5019: Terminal
which is intended for connection
to an external conductor.
PROTECTIVE
EARTH
IEC 60417-5021: Having the
same electric potential or uni-
form electric potential.
EQUIPOTENTIALITY
IEC 60417-5016: Terminal
which is intended for connection
to an external conductor.
FUSE-LINK

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4WARNING & SAFETY INFORMATION
SAFETY DEPENDS ON YOU
This appliance is for professional use by qualified personnel. This appliance
must be installed by qualified persons in accordance with the regulations in force.
This appliance must be installed with sufficient ventilation to prevent the occurrence
of unacceptable concentrations of substances harmful to health in the room in which
it is installed. This appliance needs an unobstructed flow of fresh air for satisfactory
operation & must be installed in a suitably ventilated room in accordance with cur-
rent regulations. This appliance should be serviced by qualified personnel at least
every 12 months or sooner if heavy use is expected.
CAUTION
This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning use of
the appliance by a person responsible for their safety. Children should be supervised
to ensure that they do not play with the appliance.
CAUTION
These appliances are intended to be used for commercial applications, for
example in kitchens of restaurants, canteens, hospitals, and in commercial enterpris-
es such as bakeries, butcheries, etc., but not for continuous mass production of food.
CAUTION
Improper installation, adjustment, alteration, service or maintenance can cause prop-
erty damage, injury, or death. Read the installation, operating and maintenance in-
structions thoroughly before installing, using, or servicing this equipment.
DANGER

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5
 Do not restrict the flow of ventilation air to the unit. Provide adequate clearance for operating,
cleaning, and maintaining the unit when in the installed position.
 Keep the area free and clear of combustible material. DO NOT SPRAY AEROSOLS IN THE
VICINITY OF THIS APPLIANCE WHILE IT IS IN OPERATION.
 Ovens are certified for installation on combustible floors.
 Electrical schematics are located inside the control box of the oven and in this manual. Dis-
connect input power to the unit before performing any maintenance.
 This unit requires a ventilation hood. The installation must conform to local codes.
 This unit must be operated by the same voltage, phase, & frequency of electrical power as des-
ignated on the nameplate label located on the side of the unit.
 Minimum clearances must be maintained from combustible & non-combustible construction
materials.
 Follow all local codes when installing this unit.
 Follow all local codes to electrically ground the unit.
 Appliance is not to be cleaned with high pressure water.
 XLT ovens are certified for use in stacks of up to four (4) units of XLT products. Integration of
other manufacturer’s products into an oven stack is not recommended, & will void any warran-
ties. XLT assumes no liability for mixed product applications.
 Failure to call XLT Customer Service at 1-888-443-2751 prior to contacting a repair company
voids any & all warranties.
 PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE.
 This appliance operates below 70 dBA.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable liquids or vapors in
the vicinity of this or any other appliance.
DANGER
WARNING & SAFETY INFORMATION

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6
Tips give a special instruction that can save time or provide other benefits while installing
or using the product. The tip calls attention to an idea that may not be obvious to first-time
users of the product.
TIP
NOTE
Notes indicate an area or subject of special merit, emphasizing either the product’s ca-
pability or common errors in operation or maintenance.
Repairs of all appliances & ventilation exhaust hoods should only be performed by
a qualified professional who has read & understands these instructions & is familiar
with proper safety precautions. Read this manual thoroughly before installing or
servicing this equipment.
DANGER
This manual, which contains an illustrated parts breakdown, has been prepared as an aid in
understanding how the unit operates, how to diagnose problems, and order parts for the equipment.
All of the parts, listed in the parts breakdown, are manufactured with the same precision as the
original equipment.
XLT parts and service providers are available worldwide. There are authorized service
providers located in the principle cities of the United States. There are also authorized distributors
located throughout the world.
The Theory of Operation section describes how the unit operates. An understanding of
normal operation will greatly aid diagnosis and troubleshooting. The Troubleshooting section lists
all possible display alarms, LED’s on, what went wrong, and how to fix it. This will lead to the
solution of a problem in the most efficient way. The illustrated parts section identifies the various
sub-assemblies and detailed parts which make up the equipment, as well as the part number. An
explanation of how to order parts is included.
This manual is designed to supplement the Installation & Operation Manual provided with
the unit when new. Please refer to it for descriptions, dimensions, weights, electrical requirements,
maintenance schedules, and certifications.
XLT wants you to be totally satisfied with every aspect of owning & using your oven.
Your feedback, both positive & negative, is very important to us as it helps us understand how to
improve our products & our company. Our goal is to provide you with equipment that we can be
proud to build & you can be proud to own.
To receive technical support for the oven you purchased, XLT has qualified customer ser-
vice personnel that can provide assistance on any type of XLT equipment problem you may expe-
rience. Technical support is available 24/7/365 at 888-443-2751 or visit www.xltovens.com.
GENERAL

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7
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Warranty –US and Canada
Rev A Approval Date: 08/01/2019
7761 W Kellogg Drive 67209-2003 - PO Box 9090 67277-0090 - Wichita, Kansas
Voice [phone] - [phone] - Fax [phone]
www.xltovens.com
XLT warrants Radiant Ovens manufactured aer August 01, 2019 to be free from any defect in material
and workmanship under normal use for seven (7) years from the date of original purchase by the end user, and
further warrants conveyor shas and conveyor bearings for ten (10) years. XLT further warrants all equipment to
be free from rust for ten (10) years from the date the equipment is originally purchased. In the event of a part
failure, XLT will furnish a replacement part and pay for all labor associated with the replacement of the part. If
upon inspecon XLT determines that the part is not defecve, all incurred costs will be the responsibility of the
end user purchaser. This warranty is extended to the original end user purchaser and is not transferable without
prior wrien consent of XLT. Damages are limited to the original purchase price.
DUTIES OF THE OWNER:
 The owner must inspect the equipment and crates at me of receipt. Damage during shipment is to be
immediately reported to the carrier and also to XLT
 The equipment must be installed and operated in accordance with the Installaon &Operaon Manual
furnished with the unit
 This warranty shall not excuse the owner from properly maintaining the equipment in accordance with the
Installaon &Operaon Manual furnished with the unit
 A copy of the “Inial Start-Up Checklist” must be lled out and returned to XLT when the unit is inially
installed, and/or when the unit is removed and installed in another locaon
 The electric ulies must be connected to the equipment and installed by locally licensed contractors
 Failure to contact XLT prior to contacng a repair company for warranty work voids any and all warranes
WHAT IS NOT COVERED:
 Freight damage
 Overme charges
 Any part that becomes defecve because of ulity services (power surges, high or low voltages, or improper
ulity connecons)
 Any part that becomes defecve because of moisture and/or other contaminants
 Conveyor belts
 Filters
 Painted or Powder Coated surfaces
 Normal maintenance or adjustments
 This warranty shall not apply if the equipment or any part is damaged as a result of accident, casualty,
alteraon, misuse, abuse, improper cleaning, improper venlaon, improper installaon, improper operaon,
natural disasters, or man-made disasters
CLAIMS HANDLED AS FOLLOWS:
Should any such defect be discovered, XLT must be noed. Upon nocaon, XLT will arrange for necessary
repairs to be made by an authorized service agent. Denial of services upon the arrival of an authorized service
agent will release XLT of any and all warranty obligaons.

Warranty –International
Rev A Approval Date: 08/01/2019
7761 W Kellogg Drive 67209-2003 - PO Box 9090 67277-0090 - Wichita, Kansas
Voice [phone] - [phone] - Fax [phone]
www.xltovens.com
XLT warrants Radiant Ovens manufactured aer August 01, 2019 to be free from any defect in material
and workmanship under normal use for ve (5) years from the date of original purchase by the end user, and
further warrants conveyor shas, and conveyor bearings for ten (10) years. XLT further warrants all equipment to
be free from rust for ten (10) years from the date the equipment is originally purchased. In the event of a part
failure, XLT will furnish a replacement part and pay for all labor associated with the replacement of the part. If
upon inspecon XLT determines that the part is not defecve, all incurred costs will be the responsibility of the
end user purchaser. This warranty is extended to the original end user purchaser and is not transferable without
prior wrien consent of XLT. Damages are limited to the original purchase price.
DUTIES OF THE OWNER:
 The owner must inspect the equipment and crates at me of receipt. Damage during shipment is to be
immediately reported to the carrier and also to the Distributor/Service Provider
 The equipment must be installed and operated in accordance with the Installaon &Operaon Manual
furnished with the unit
 This warranty shall not excuse the owner from properly maintaining the equipment in accordance with the
Installaon &Operaon Manual furnished with the unit
 A copy of the “Inial Start-Up Checklist” must be lled out and returned to Distributor/Service Provider when
the unit is inially installed, and/or when the unit is removed and installed in another locaon
 The electric ulies must be connected to the equipment and installed by locally licensed contractors
 Failure to contact the Distributor/Service Provider prior to contacng a repair company for warranty work
voids any and all warranes
WHAT IS NOT COVERED:
 Freight damage
 Overme charges
 Any part that becomes defecve because of ulity services (power surges, high or low voltages, or improper
ulity connecons)
 Any part that becomes defecve because of moisture and/or other contaminants
 Conveyor belts
 Filters
 Painted or Powder Coated surfaces
 Normal maintenance or adjustments
 This warranty shall not apply if the equipment or any part is damaged as a result of accident, casualty,
alteraon, misuse, abuse, improper cleaning, improper venlaon, improper installaon, improper operaon,
natural disasters, or man-made disasters
CLAIMS HANDLED AS FOLLOWS:
Should any such defect be discovered, the Distributor/Service Provider must be noed. Upon nocaon,
Distributor/Service Provider will arrange for necessary repairs to be made by an authorized service agent. Denial
of services upon the arrival of an authorized service agent will release XLT and Distributor/Service Provider of any
and all warranty obligaons.

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10 RECOMMENDED TOOL LIST
Sockets
QTY. Ratchets QTY. Pliers QTY.
1/4" Drive 7" 1/4" Drive 1 Diagonal SM 1
3/16 1 12" 3/8" Drive 1 Diagonal Std 1
7/32 1 Slip Joint Std 1
1/4 1 Extensions QTY. Needle Nose 1
9/32 1 1/4" Drive Wire Strippers 1
5/16 1 3" 1 Wire Crimpers 1
3/8 1 6" 1
7/16 1 10" 1 Hammer QTY.
1/2 1 3/8" Drive 8 oz. Ball Peen 1
3/8" Drive 1-1/2" 1
7/16 1 3" 1 Drills QTY.
1/2 1 6" 1 Cordless Micro 1
9/16 1 10" 1 Cordless Std 1
5/8 1
3/4 1 Gearwrench QTY. Bits QTY.
11/16 1 5/16 1 6" #2 Phillips 1
13/16 1 3/8 1 3/16" Drill Bit 1
7/8 1 7/16 1 5/32" Drill Bit 1
15/16 1 1/2 1 #10-24 Tap 1
1" 1 9/16 1 #8-32 Tap 1
3/8" Drive Allen 5/8 1
1/8 1 11/16 1 Miscellaneous QTY.
3/16 1 3/4 1 Volt/Amp Meter 1
7/32 1 Heat Probe 1
1/4 1 Screw Drivers QTY. Molex Extractor 1
5/16 1 #2 Phillips 1 Molex Crimper 1
3/8 1 #1 Phillips 1 Straight Pick 6" 1
1/4" Flat Blade 1 90 Degree Pick 6" 1
T-Handle Allen
QTY. 1/8" Flat Blade 1 7" Zip Ties 20
3/32 1 Flashlight 1
7/64 1 Nut Driver QTY. 25' Tape Measure 1
1/8 1 5 MM 1 Electrical Tape 1
3/16 1 8 MM 1 White Lithium Grease 1
1/4 1 Stainless Steel Cleaner 1
7/32 1

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11
INSTALLATION RESPONSIBILITIES
Site Survey: Verify electrical capabilities X
Assembly of new ovens per XLT Installation & Operation Manual
Base assembled and set in place X
Ovens moved and stacked with proper lifting equipment X
Peel all PVC X
Connect cord anchorage to incoming electrical supply X
Connect electrical supply X
Connection may require Permit and Code Inspections X
Relocate Make-Up-Air to enter the room at the ends of the ovens X
Start-up per XLT Installation & Operation Manual X
Verify oven functions, adjust as necessary X
Start-Up Checklist must be submitted to XLT to validate Warranty X
Responsibility
Service
Company
Owner/
Contractor

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12 OVEN THEORY OF OPERATION
The first part of the Theory of Operation explains how electrical power is delivered to the
oven and initial sequences when the main power on the LUI is turned on based on an oven with
right hand controls. The remainder of the Theory of Operation section explains the function of
components in alphabetical order. These components are also listed on the schematic.
 Line voltage for Standard Ovens is assumed to be 208/240 VAC, 3Φ, 60 Hz.
 Line voltage for World Ovens is assumed to be 380 VAC, 3Φ, 50 Hz.
Power originates at the electrical connection on the wall. Line voltage is then carried into
the oven through the power cord to the Circuit Breaker (CB1). After the circuit breaker, one wire
goes to the COM on the High Limit Switch (S3), tees off and goes through a Circuit Breaker
(CB2) and then to L1 on S3. When S3 is energized the NO terminal delivers power to the Power
Supply (PS). The other leg acts as a neutral for S3 and PS. After the PS, 24 VDC is delivered to
the Terminal Strip (TS1). From the other side of TS1, power is then supplied to both Oven Con-
trols (OMC1 & OMC2).
When the main power button is turned on, 24VDC will be carried through OMC1 to TS1
#3L. OMC1 sends power to the Conveyor Motor (M2) and after a 30 second delay, it sends power
to Cooling Fans (M3) and the Contactor (C1).
The OMC sends power through TS1 to C1 and to both M3’s. M3 starts to spin, providing
cool air for the control box. C1 delivers power to the Terminal Strip (TS2) which travels through
to the Solid State Relays (SSR1-SSR4) and turns on the Heating Elements (H1-H4).
C1 - The Contactor is an electrically controlled switch used for switching a power circuit. A con-
tactor is controlled by a control circuit that has a much lower power level than the switched circuit.
They consist of a small coil and a set of three SPST (Single Pole Single Throw) contacts. When
the LUI is turned on, 24 VDC voltage is applied to the coil, which closes the contacts. Then power
is allowed to flow to the Solid State Relays (SSR’s).
CB - Circuit Breakers are used to protect electrical components. The current value is printed on the
front of all breakers. If a CB is tripped, eliminate the cause and press the front to reset. CB1 is the
circuit breaker for the main power coming into the oven. This operates in the same fashion but has
a much higher amp rating.
When the main power on the Large User Interface (LUI) is turned on:
1. The Fan (M3) located on the Control Panel will run.
2. The heating panels will begin to heat up.
3. The LUI will display actual temperature until set point is reached.
4. The LUI will display belt time.
5. The conveyor belt will move.

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13
H1-H4 - The Heating Elements convert electricity into heat through the process of joule heating.
Electric current through the element encounters resistance, resulting in heating the element. The
resistance values of the two (2) different part numbers used are:
 RP-5101-208-2.4 2400 Watt 17.50 Ohms
 RP-5101-240-2.4 2400 Watt 23.30 Ohms
Please refer to the Parts section for the proper application.
LUI - The Large User Interface is powered by the OMC by the RS 485 cable. The main power
button is located on the front face of the LUI. The conveyor and temperature of the oven is con-
trolled through the LUI. You can change the factory settings for the oven size, temperature offset,
belt direction, etc. The LUI will display error messages and maintenance alarms. There are 12
menu presets for predetermined time and temperature settings. The screen can be locked to prevent
unwanted changes. There is also a self clean feature that raises the temperature of the oven to burn
off any food particles that may be left behind on the heating elements.
M2 - The Conveyor Motor is a brushless 24 VDC gear motor. The motor receives current from the
OMC through three (3) wires; 1) a black or “W” phase, 2) a white or “V” phase, and 3) a red or
“U” phase. They carry between 18 to 24 VDC. Each wire is energized by the OMC in sequence to
provide power to the individual stator coils which, in turn, provide motor rotation. To determine
the rotor position and send this position to the controller, three (3) Hall Effect switches are utilized.
They read the rotational information from a disc mounted on the rotor assembly. This information
is transmitted to the OMC by three (3) wires; 1) an orange “U” phase pole signal output, 2) a green
“V” phase pole signal output, and 3) a green/white “W” phase pole signal output. These are locat-
ed in a plug that inserts into the OMC1 or OMC2. There are two (2) additional wires in this plug;
1) a purple wire which is supply voltage for the pole sensor, and 2) a gray wire that is ground. The
OMC, using an internal logic circuit, energizes the stator coils to provide proper rotation and sets
the energization (phase) timing to obtain the desired belt speed set on the controller. The motor
drives an integral gear box that reduces the motor output speed to give the correct travel time to the
conveyor belt. The integral gear box is sealed and permanently lubricated with grease. The ratio is
1/200. This motor contains no serviceable parts. The OMC will detect if the conveyor belt has a
jam by monitoring the rotor signal. If the signal falls more than 25% below the expected rate a jam
is detected. This action will stop the conveyor and display an alarm on the LUI. To reset the alarm
press and hold the “Time” key for ten (10) seconds.
OVEN THEORY OF OPERATION
1) P1- Not Used
2) P2- RS-485 Cable To OMC1
1) +5V
2) 485-
3) 485+
4) Ground
3) P3- RS-485 Cable To OMC2
1) +5V
2) 485-
3) 485+
4) Ground
4) P5- Ground
5) P17- Not Used
54123

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14 OVEN THEORY OF OPERATION
M3 - The Cooling fan provides cool air for the components inside the control box. It is controlled
by turning on and off the main power button. A filter is provided to ensure clean air.
OMC - The Oven Machine Control reads selections or parameters from the LUI. It holds the logic
for the conveyor controls and the temperature controls. The OMC will turn on or off SSR’s, turn
on M3 and contactor, and control M2.
PS - The Power Supply rectifies line voltage to 24 VDC, and supplies power to the OMC.
PU - The Pick-Up is physically mounted within M2 and utilizes hall effect technology integral to
the M2 to monitor the rotation speed. The hall effect signal is transmitted to the OMC, which con-
verts it into linear travel speed of the conveyor.
RTD - The Resistive Thermocouple Detector monitors the air temperature inside the bake cham-
ber. The RTD wire is a pure material, typically platinum, nickel, or copper. The material has an
accurate resistance/temperature relationship which is used to provide an indication of temperature.
1) CN2- 24VDC
1) +24 VDC Main Power To OMC
2) +24 VDC
3) -24 VDC
4) -24 VDC Ground to TS2
2) CN1- Line Voltage
1) Neutral
2) Not Used
3) Line Voltage
1
2
2
6
1
8
4
3
9
7
1) P1- Not Used - Digital Input
2) P2- RS-485 Cable To LUI
1) +5V
2) 485-
3) 485+
4) Ground
3) P4-Molex Provided With Harness
1) +24 Remote Switch
2) +24 Power (In) Switch
3) Relay +24 Switched (Out)
4) P5- Elan Programming
5) P6- Elan Serial Port
6) P7- Jumper For OMC 1 or 2
7) P8- Not Used—Thermocouples
8) P9- Conveyor Motor
1) Motor SA
2) Motor SB
3) Motor SC
4) Hall +5V
5) Hall HC+
6) Hall HB+
7) Hall HA+
8) Ground
9) Not Used
9) P10- Molex Provided With Harness
1) Not Used
2) Not Used
3) 24 VDC(-) Main Power
4) 24 VDC(+) Main Power
10) P11- JST Provided With Harness
1) +24 VDC To SSR
2) -24 VDC Ground To SSR
5
10

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15
OVEN THEORY OF OPERATION
S3 - The High Limit Switch is an electronic, SPST (Single Pole Single Throw) switch. Its pur -
pose is to provide fail safe operation. When the oven receives power, S3 closes. If the RTD tem-
perature exceeds 650°F (343°C) the red LED will illuminate and S3 opens to interrupt line voltage
to all components. In order to reset the S3, you must unplug the main power supply.
SSR 1-4 - A Solid State Relay is an electronic switching device in which a small control signal
from the OMC energizes the relay to send a larger load current and voltage to the heating element.
It is comprised of a voltage sensor which responds to the thermocouple (T/C) and a solid state
switching device which switches power to the Heating Elements (H1-H4) either on or off, all of
which is completed without mechanical parts.
T/C - The thermocouple is a type K. It consists of two different conductors that produce a voltage
proportional to a temperature difference between either end of the pair of conductors. The T/C is
connected to P8 Terminals 1 & 2 on the OMC. The millivolt signal is used to display the actual
oven temperature.
TCM - The Thermocouple Module continuously reads the input from the 4 thermocouples and
relays that information via the RS485 cable to the OMC which then gets displayed on the LUI.
1
1) COM– Line Voltage
2) N.O.- Switched Line Voltage
3) L2- High Limit Power
4) L1- High Limit Power
5) RTD
2
3
4
5
1
2
3
4
5
6
1) TC1 (+ & -)
2) TC2 (+ & -)
3) TC3 (+ & -)
4) TC4 (+ & -)
5) RS485 Cable to LUI
6) RS485 Cable to OMC1

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16 OVEN THEORY OF OPERATION
TS 1 & 2- The Terminal Strips, serve as a connection point for wires. TS2 is physically larger
than TS1. (The above location configuration is based on a right hand oven.)
1
2
6L-
1L-
-6R
-1R
6L-
1L-
-6R
-1R
2) TS2- Terminal Strip
1L) Power To H1
2L) Power To H4
3L) Power To H2
4L) Not Used
5L) Power To H3
6L) Not Used
1R) Not Used
2R) Incoming Power
3R) Power To SSR
4R) Incoming Power
5R) Power To SSR
6R) Incoming Power
2) TS1- Terminal Strip
1L) Power to SRC
2L) +24 VDC In
3L) Power To Relay COM
4L) Remote Switch
5L) -24 VDC
6L) Ground To Contactor
1R) +24 VDC Out
2R) Power To OMC1 & OMC2
3R) Power To M3 & C1
4R) Remote Switch
5R) -24 VDC To M3
6R) Ground To OMC1 & OMC2

Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
17
OVEN TROUBLESHOOTING
1. Check that the power cord to the oven is connected and/or plugged in if equipped with a plug
and receptacle.
2. Check to see that the circuit breakers in the building electrical service panel have not been
tripped or turned off.
3. Check all circuit breakers on the oven control box to ensure they have not been tripped.
4. Ensure proper voltage, amperage, and wire size.
If your oven does not function properly, please verify the following conditions:
Mechanical Function
If your oven still does not function properly, XLT has qualified customer service personnel
that can provide assistance on any type of XLT equipment problem you may experience. Tech-
nical support is available 24/7/365 at 888-443-2751, or visit www.xltovens.com.
If your oven still does not function properly, perform a hard reset. First, power down the
units then unplug the units from all electrical power. Leave the units unplugged for One(1) minute.
Once this is done, plug the units back in and turn on the power.
Proceed with caution and read the following instructions carefully when
unplugging the units.
HIGH
VOLTAGE
Hard Reset

Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
18 OVEN TROUBLESHOOTING
LUI Service Error Codes
Display Alarm MC LED
Error Determination Troubleshooting
TC1 FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp Sensor Error, Open or Short.
Temp <40F (4C) or >1200F
(649C)
Perform a Hard Reset. If error still exists,
contact XLT.
TC2 FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp Sensor Error, Open or Short.
Temp <40F (4C) or >1200F
(649C)
Perform a Hard Reset. If error still exists,
contact XLT.
TC3 FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp Sensor Error, Open or Short.
Temp <40F (4C) or >1200F
(649C)
Perform a Hard Reset. If error still exists,
contact XLT.
TC4 FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp Sensor Error, Open or Short.
Temp <40F (4C) or >1200F
(649C)
Perform a Hard Reset. If error still exists,
contact XLT.
PCB TEMP THERM
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp Sensor Error, Open or Short.
Perform a Hard Reset. If error still exists,
contact XLT.
U.L.ELEMENT
FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
From (run) signal, if oven does not
see 25F temp rise on Element 2
(Upper Left) in 4 minutes. If restart
(actual temp within 50F of setpoint)
error timing 10 minutes
Perform a Hard Reset. If error still exists,
contact XLT.
U.R.ELEMENT
FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
From (run) signal, if oven does not
see 25F temp rise on Element 1
(Upper Right) in 4 minutes. If restart
(actual temp within 50F of setpoint)
error timing 10 minutes
Perform a Hard Reset. If error still exists,
contact XLT.
L.L.ELEMENT
FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
From (run) signal, if oven does not
see 25F temp rise on Element 4
(Lower Left) in 4 minutes. If restart
(actual temp within 50F of setpoint)
error timing 10 minutes
Perform a Hard Reset. If error still exists,
contact XLT.
L.R.ELEMENT
FAILURE
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
From (run) signal, if oven does not
see 25F temp rise on Element 3
(Lower Right) in 4 minutes. If restart
(actual temp within 50F of setpoint)
error timing 10 minutes
Perform a Hard Reset. If error still exists,
contact XLT.
U.L. Under Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Once Setpoint has been reached,
then if Actual is 15F under setpoint
for 30 minutes. If user adjusts
SETPOINT, reset timer
Perform a Hard Reset. If error still exists,
contact XLT.
U.R. Under Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Once Setpoint has been reached,
then if Actual is 15F under setpoint
for 30 minutes. If user adjusts
SETPOINT, reset timer
Perform a Hard Reset. If error still exists,
contact XLT.
L.L. Under Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Once Setpoint has been reached,
then if Actual is 15F under setpoint
for 30 minutes. If user adjusts
SETPOINT, reset timer
Perform a Hard Reset. If error still exists,
contact XLT.
L.R. Under Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Once Setpoint has been reached,
then if Actual is 15F under setpoint
for 30 minutes. If user adjusts
SETPOINT, reset timer
Perform a Hard Reset. If error still exists,
contact XLT.

Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
19
OVEN TROUBLESHOOTING
LUI Service Error Codes
Display Alarm MC LED
Error Determination Troubleshooting
U.L. Over Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp 50F over setpoint for period
>1 minute. If user adjusts
SETPOINT lower, inhibit alarm until
new setpoint reached
Perform a Hard Reset. If error still exists,
contact XLT.
U.R. Over Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp 50F over setpoint for period
>1 minute. If user adjusts
SETPOINT lower, inhibit alarm until
new setpoint reached
Perform a Hard Reset. If error still exists,
contact XLT.
L.L. Over Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp 50F over setpoint for period
>1 minute. If user adjusts
SETPOINT lower, inhibit alarm until
new setpoint reached
Perform a Hard Reset. If error still exists,
contact XLT.
L.R. Over Temp
(Shows actual temp)
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
Temp 50F over setpoint for period
>1 minute. If user adjusts
SETPOINT lower, inhibit alarm until
new setpoint reached
Perform a Hard Reset. If error still exists,
contact XLT.
Over Speed
(For split belt note,
MC1 or MC2 and
note FRONT or
BACK)
Alarm LED on. Flash
CONVEYOR LED. All other
LED's operate as normal.
Speed > 30s fast duration vs.
setpoint
Perform A Hard Reset. If Error Still exists,
Check LUI Settings. If Settings Are Correct,
Perform A Pan Test Too Confirm Settings. If
Error Still exists, Contact XLT.
Under Speed
(For split belt note,
MC1 or MC2 and
note FRONT or
BACK)
Alarm LED on. Flash
CONVEYOR LED. All other
LED's operate as normal.
Speed > 30s slow duration vs.
setpoint
Check Drive Chain and Sprocket To Verify
Proper Working Condition. Perform A Hard
Reset. If Error Still exists, Check LUI
Settings. If Settings Are Correct, Perform A
Pan Test Too Confirm Settings. If Error Still
exists, Contact XLT.
Software Error
Alarm LED Flash. All other
LEDs off
Internal software error
Perform a Hard Reset. If error still exists,
contact XLT.
EEPROM Error
Alarm LED Flash. All other
LEDs off
Bad checksum
Perform a Hard Reset. If error still exists,
contact XLT.
Key Short
Alarm LED Flash. All other
LEDs off
Any key shorted > 1minute
Clean LUI screen. Perform a Hard Reset.If
error still exists, contact XLT.
Comm Error
Alarm LED Flash. All other
LEDs off
Internal software error
Perform a Hard Reset. If error still exists,
contact XLT.
U.L. HI ALARM
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
HI ALARM setpoint exceeded. See
Temp Control Cable
Perform a Hard Reset. If error still exists,
contact XLT.
U.R. HI ALARM
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
HI ALARM setpoint exceeded. See
Temp Control Cable
Perform a Hard Reset. If error still exists,
contact XLT.
L.L. HI ALARM
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
HI ALARM setpoint exceeded. See
Temp Control Cable
Perform a Hard Reset. If error still exists,
contact XLT.
L.R. HI ALARM
Alarm LED on. Flash HEAT
LED. All other LED's operate
as normal.
HI ALARM setpoint exceeded. See
Temp Control Cable
Perform a Hard Reset. If error still exists,
contact XLT.
Belt Jam
Conveyor LED Flash, All other
LED's operate as normal
If the current motor speed is less
than 25% of the most recent
minimum motor speed
Check for Obstructions. If No Obstructions
are found, check drive chain and sprocket to
verify proper working condition. Perfom a
hard reset. If error still exists, contact XLT.

Technical Support US: 888-443-2751 Technical Support INTL: 316-943-2751
20 OVEN SERVICE PROCEDURES
Large User Interface Programming Procedure
Read the entire instruction before programming.
TIP
Configuration Key Functions
ENTER = Used to select and save parameters.
UP = Increases the setting of the selected parameter.
DOWN = Decrease the setting of the selected parameter.
To enter factory tech mode press both UP and DOWN buttons simultaneously for ten (10) seconds
and the following parameters will be displayed:
1. Software Version
2. Serial Number Entry
3. Elapsed Time:
 Total Hours.
 Hours Since Filter has been Cleaned.
4. Belt Length: 36 = 2336
5. Belt Width: 23 = 2336
6. Split Belt:
 Defaults to No.
7. Remote Hood Switch Installed:
 Defaults to No.
8. Temperature Offset Adjustments:
 Offset shown in degrees Fahrenheit
9. High Temperature range from 1000°F (538°C) to Low Temperature.
10. Low Temperature range from 250°F (121°C) to High Temperature.
11. Belt Direction:
 Defaults to right to left.
 Can be switched from left to right without physically changing the wire belt direction.
12. Beeper Button Test
13. Done
 Will return user to operation screen