Vulcan-Hart MiniJet V1MF061E-86 Service Manual

SERVICE MANUAL

MINI JET COMBI OVEN

Model ­V1MF061E-86

- NOTICE -

This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified.

This manual is not intended to be all encompassing. If you have
not attended a Vulcan Service School for this product, you should
read, in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.

The reproduction, transfer, sale or other use of this Manual,
without the express written consent of Vulcan, is prohibited.

This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.

A product of Vulcan-Hart 3600 North Point Blvd Baltimore, MD 21222

F45614 Rev. A (0219)

MINI JET COMBI OVEN

TABLE OF CONTENTS

SERVICE UPDATES ....................................................................................... 4

SERVICE UPDATES ................................................................................... 4

TIS DOCUMENT LIST - MINIJET ....................................................................... 4

GENERAL .................................................................................................. 5

INTRODUCTION ....................................................................................... 5

TOOLS ................................................................................................. 5

WATER QUALITY STATEMENT ........................................................................ 5

STAINLESS STEEL STATEMENT ...................................................................... 6

SPECIFICATIONS ...................................................................................... 6

REMOVAL AND REPLACEMENT OF PARTS ............................................................... 8

TOP COVER ........................................................................................... 8

BACK COVER .......................................................................................... 8

CONTROL PANEL ..................................................................................... 8

ENCODER ............................................................................................. 9

TOUCH PANEL / DISPLAY ASSEMBLY ................................................................. 9

BUZZER .............................................................................................. 10

OUTPUT CONTROL ASSEMBLY ...................................................................... 10

OUTPUT CONTROL ASSEMBLY RELAY BOARD ..................................................... 11

TRANSFORMER - LIGHTS ............................................................................ 11

TRANSFORMER - PRIMARY .......................................................................... 12

TRANSFORMER - VENT MOTOR ..................................................................... 12

CONTACTOR ......................................................................................... 13

ANTI-INTERFERENCE FILTER ........................................................................ 13

AXIAL FANS .......................................................................................... 14

CAPACITOR .......................................................................................... 15

CONVECTION FAN ................................................................................... 15

CONVECTION FAN MOTOR .......................................................................... 16

HEATING ELEMENT .................................................................................. 17

VENT MOTOR ........................................................................................ 18

CAVITY TEMPERATURE PROBE ..................................................................... 18

HIGH LIMIT SWITCH .................................................................................. 19

LED STRIP ........................................................................................... 20

INTERNAL GLASS DOOR ............................................................................. 20

DOOR LATCH ........................................................................................ 20

DOOR SWITCH ....................................................................................... 21

DOOR CATCH ........................................................................................ 21

DOOR ................................................................................................ 22

FILTERED WATER PRESSURE RESTRICTOR ........................................................ 23

FLOW METER ........................................................................................ 23

DETERGENT PUMP .................................................................................. 24

3-WAY SOLENOID VALVE ............................................................................ 24

SOLENOID VALVE YV ................................................................................ 25

SOLENOID VALVE YC ................................................................................ 25

SERVICE PROCEDURES AND ADJUSTMENTS ........................................................... 27

HEATING ELEMENT TEST ............................................................................ 27

SOLENOID VALVES .................................................................................. 28

CONVECTION MOTOR RESISTANCE ................................................................ 29

ELECTRICAL OPERATION ................................................................................ 32

COMPONENT FUNCTION ............................................................................ 32

COMPONENT LOCATION ............................................................................. 34

OUTPUT CONTROL ASSEMBLY ...................................................................... 43

SEQUENCE OF OPERATION ............................................................................. 45

F45614 Rev. A (0219) Page 2 of 91

MINI JET COMBI OVEN

CONDITIONS ......................................................................................... 45

POWER ON ........................................................................................... 45

HEAT ................................................................................................. 46

HEAT AND HUMIDITY ................................................................................ 47

CLEAN ................................................................................................ 47

OTHER ............................................................................................... 48

WIRING / FLUID DIAGRAMS .............................................................................. 51

WIRING DIAGRAM .................................................................................... 51

FLUID DIAGRAM ...................................................................................... 53

DISPLAY SCREEN CONTROLS AND INFORMATION ..................................................... 54

AUTO SCREEN CONTROLS AND INFORMATION .................................................... 54

MANUAL SCREEN CONTROLS AND INFORMATION ................................................. 54

TOOL BOX SCREEN CONTROLS AND INFORMATION ............................................... 54

AUTO CLEANING SCREEN CONTROLS AND INFORMATION ........................................ 55

MANUAL CLEANING SCREEN CONTROLS AND INFORMATION ..................................... 56

USER MANUAL INFORMATION ....................................................................... 58

DATA EXCHANGE CONTROLS AND INFORMATION ................................................. 58

CLIENT PARAMETER SCREEN CONTROLS AND INFORMATION .................................... 60

INSTALLATION PARAMETERS SCREEN CONTROLS AND INFORMATION ........................... 63

TECHNICAL PARAMETERS SCREEN CONTROLS AND INFORMATION .............................. 64

WATER TREATMENT COUNTER ..................................................................... 68

DIAGNOSTICS ............................................................................................ 71

ERROR SCREENS AND INFORMATION .............................................................. 71

ERROR HISTORY / COUNTER SCREENS AND INFORMATION ....................................... 78

DIAGNOSTIC SCREENS .............................................................................. 80

OPERATION / DIAGNOSTIC INDICATORS ............................................................ 81

TEMPERATURE PROBE TEST ....................................................................... 84

PT100 PROBE CHECK ................................................................................ 84

SOFTWARE .............................................................................................. 86

SOFTWARE UPDATE PROCEDURE .................................................................. 86

© VULCAN 2019

Page 3 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SERVICE UPDATES

SERVICE UPDATES

SERVICE UPDATES

FEBRUARY, 2019

• Updated SOFTWARE UPDATE PROCEDURE.

NOVEMBER, 2018

• New serivce manual released.

TIS DOCUMENT LIST - MINIJET

SERVICE TAB

Document Title Document Type

Minijet Service Manual Service Manual

SERVICE TAB (Multimedia)

Document Title Document Type

Minijet Wiring Diagram Electrical Diagram

Minijet Installation Quick Start Up Guide

Minijet Operator Manual Operator

Minijet Installation Service Instructions

PARTS TAB

Document Title Document Type

Minijet Parts Catalog Parts Catalog

F45614 Rev. A (0219) Page 4 of 91

MINI JET COMBI OVEN - GENERAL

GENERAL

INTRODUCTION

This guide provides service information for the Minijet
Combi oven. These ovens include the following
standard features.

• Multiple cooking capabilities including: Baking,
Steaming, Roasting, Grilling, Air-Fry,
Rethermalization, Proofing, Finishing, Poaching,
Stewing, Low Temp, Defrosting, Cook & Hold,
and more.

• Boilerless combi operation using direct steam
creation for optimized cooking capability and
production with minimal energy and water
consumption.

• Capacity of (4) 12" x 20" x 2.5", (4) 13" X 18" X
1" or (6) 12" x 20" x 1" pans.

• Control via LCD touch screen display and an
encoder turn/push knob.

• Temperature range of 80-482 °F with visual
display of Set and Actual temperature readings.

• Timed operation up to 99:00 hours. Timer can
display amount of time set, time remaining, or
count time. The timer resets for batch cooking
after completion of a timed cycle (ABC).

• Humidity range of 0-100%.

• Cavity blower with speed control and auto­reversing capability.

• Flashing LED lights and an audible alarm that
alerts the user when the cooking cycle finished.

There are three primary interface screens: Auto,
Manual, and Tool Box. The auto and manual
interfaces contain various controls and icon
associated with oven operation. The tool box interface
contains icons and controls associated with
configuring the oven.

TOOLS

Standard

• Standard set of hand tools.

• Metric set of hand tools.

• VOM with measuring micro amp current tester.
Any VOM with minimum of CAT III 600V, CE
certified. Sensitivity of at least 20,000 ohms per
volt can be used. In addition, meter leads must
also be a minimum of CAT III 600V.

• Clamp on type amp meter with minimum of
NFPA-70E CAT III 600V, UL/CSA/TUV listed.

• Temperature tester (thermocouple type).

• Field service grounding kit.

Special

• Puller and M6x40 socket head screw to remove
convection fan.

WATER QUALITY STATEMENT

The fact that a water supply is potable is no guarantee
that it is suitable for steam generation. Proper water
quality can improve the taste of the food prepared in
the oven, reduce scale build-up or corrosion, and
extend equipment life. Local water conditions vary
from one location to another and can change
throughout the year. The recommended water
treatment for effective and efficient use of this
equipment will vary depending on the local water
conditions. Your water supply must be within the
general guidelines outlined in the chart below at all
times during use of this machine or service issues not
covered under warranty may result.

NOTE: Failure to properly maintain water quality or
preventative procedures for water can lead to issues
not covered under warranty.

WATER SUPPLY GENERAL GUIDELINES CHART

1

Supply Pressure
(dynamic flow)

Hardness

Silica less than 13 ppm

Chloramines

Chlorides

Total Chlorine

PH range 7-8

Un-Dissolved Solids less than 5 microns

1

Testing of water is always done AFTER water
filter or water treatment used. Water quality does
change with usage and should be checked
periodically to see if the condition worsens.

2

A carbon block filter system should always be
used to remove Chlorine and Chloramine. If a

2

2

4

30-60 psig

less than 3 grains (17.1
ppm = 1 grain of
hardness)

zero

less than 30 ppm

zero

3

Page 5 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - GENERAL

water softener is used, a carbon block is still
required. Check with your local water treatment
specialist for proper sizing and replacement
intervals for the carbon block cartridge.

3

If the Chlorides exceed 30 ppm and the oven is
used more than 8 hours during the day in steam
or combination mode the cavity will require
rinsing every 8 hours. Failure to do so will result
in corrosion and rusting of the oven cavity and
interior parts. A Reverse Osmosis water treatment
system can be installed to eliminate chlorides
from the water and reduce the hardness.
Preventative washing and rinsing may be needed
more than once a day to prevent compounding of
contaminants inside cavity.

4

Total Chlorine of 4.0 ppm is the max limit for the
building water supply. A carbon block filter must
still be used to remove all Chlorine and
Chloramines from the water. Failure to do so will
result in corrosion and rust in the cooking cavity
which is not covered under warranty.

Water hardness should be treated by removing the
impurities (water softener with carbon block or
dechlorinator and/or in-line water treatment). Low
water hardness may also require a water treatment
system to reduce potential corrosion. Water treatment
has been shown to reduce costs associated with
machine cleaning, reduce deliming and reduce
corrosion of metallic surfaces.

Daily washing and rinsing of the cavity is required. In
some cases it may be needed more than once a day
to prevent compounding of contaminants deposited
inside cavity even with acceptable filtration. Failure to
wash and rinse down the cavity daily could result in
damage of the oven cavity and interior parts. A
Reverse Osmosis water treatment system can be
installed to eliminate chlorides or other contaminates
from the water if needed.

• Duration of contact.

The combination of these three factors may lead to the
eventual destruction of parts of the equipment, even
if they have been made in very high quality stainless
steel. Generally, cleaning products, which are not
appropriate or are improperly used, lack of
maintenance, or extreme conditions of use are often
found to be the cause of damage.

SPECIFICATIONS

Electrical and grounding connections must
comply with the applicable portions of the
National Electrical Code and / or other local
electrical codes.

ELECTRICAL CONNECTIONS

• Standard: 208/60/3 with 6-foot cord and
LP-15-30P NEMA plug.

• Field convertible options: 208/60/1, 240/60/1 or
240/60/3.

SUPPLY

• 208 VAC.

• 1 Phase / 5.2 kW / 25 Amp.

• 3 Phase / 5.2 kW / 14.9 Amp.

• 240 VAC.

• 1 Phase / 6.83 kW / 28.5 Amp.

• 3 Phase / 6.83 kW / 16.8 Amp.

Plumbing connections must comply with the
applicable sanitary, safety and plumbing codes.

STAINLESS STEEL STATEMENT

Stainless steel has a thin protective sheet formed on
the metallic surface to protect it against corrosion.
Anything facilitating its partial destruction (food
residues, overflow of liquids, stagnant liquids, etc.)
reduces the resistance of stainless steel to corrosion.
While the composition of stainless steel enables it to
withstand some chemical aggression better than
classical steels, it is not indestructible. Three main
factors contributing to corrosion should be watched
for:

• Chemical environment.

• Temperature.

F45614 Rev. A (0219) Page 6 of 91

Failure to connect the filtered supply port to an
approved filter system will void the warranty.

PLUMBING CONNECTIONS

SUPPLY

Filtered and unfiltered water line female fittings
connect to ¾-inch male NHST fittings. The input
supply must meet the criteria provided in WATER
QUALITY STATEMENT.

DRAIN

The drain port is a 1¼-inch un-threaded adjustable
copper elbow.

MINI JET COMBI OVEN - GENERAL

• Drain water can be condensate and at a very high
temperature (140 °F). Use suitable materials in
drain plumbing.

• The drain plumbing (not supplied) must include a
trap. Refer to local codes and regulations.

AIR SUPPLY / EXHAUST

• The required flow rate of new air for combustion
is 1.2 Cubic Feet / Minute (CFM) per kW of heat
release rate.

• The steam exhaust flues are not to be connected
tightly on to a hood or to an exhaust duct.

Page 7 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

REMOVAL AND REPLACEMENT OF PARTS

TOP COVER

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Unscrew and remove vent cover (1, Fig. 1).

2. Remove rubber boot (2, Fig. 1) from vent tube.

3. Remove screws, washers, and top cover.

4. Reverse procedure to install.

Fig. 1

BACK COVER

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

Fig. 2

CONTROL PANEL

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Disconnect Ethernet cable from output control
assembly port (1, Fig. 3).

3. Disconnect external core probe cable from
output control assembly connector (2, Fig. 3).

4. Open oven door.

5. Remove screws and control panel from frame.

6. Reverse procedure to install.

1. Remove TOP COVER.

2. Remove screws and back cover (Fig. 2).

3. Reverse procedure to install.

F45614 Rev. A (0219) Page 8 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 4

Fig. 3

ENCODER

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.

3. Pull encoder knob (2, Fig. 4) and nut from
encoder (1).

4. Disconnect encoder cable connector (4, Fig. 4)
from touch panel / display assembly.

5. Disconnect spade lug (3, Fig. 4) from control
panel frame.

6. Remove encoder from control panel.

7. Reverse procedure to install.

TOUCH PANEL / DISPLAY

ASSEMBLY

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.

3. Disconnect external USB cable (1, Fig. 5) from
touch panel / display assembly.

4. Disconnect Ethernet cable (2, Fig. 5) from touch
panel / display assembly.

5. Disconnect encoder cable (3, Fig. 5) from touch
panel / display assembly.

6. Remove blind nut and spring (4, Fig. 5).

7. Tilt and lift touch pad / display assembly (5, Fig.

5) from bracket (6).

8. Reverse procedure to install.

Page 9 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

5. Remove fasteners and buzzer (Fig. 7) from touch
panel / display assembly cover.

6. Reverse procedure to install.

Fig. 5

BUZZER

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.

3. Remove fasteners and cover from touch panel /
display assembly.

4. Disconnect buzzer electrical cable connector
(Fig. 6) from touch panel / display assembly.

Fig. 7

OUTPUT CONTROL ASSEMBLY

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.
NOTE: Document all electrical connections.

2. Remove connectors from output control
assembly (Fig. 8).

3. Loosen two screws and slide output control
assembly to right.

4. Lift output control assembly out of oven.

NOTE: Make sure no wires are trapped / pinched
between output control assembly and frame.

5. Reverse procedure to install.

Fig. 6

F45614 Rev. A (0219) Page 10 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

4. Remove relay board (Fig. 10) from output control
assembly.

5. Reverse procedure to install.

Fig. 10

Fig. 8

OUTPUT CONTROL ASSEMBLY

RELAY BOARD

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove OUTPUT CONTROL ASSEMBLY.

3. Remove screws and control output assembly
back cover (Fig. 9).

TRANSFORMER - LIGHTS

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.
NOTE: Document all electrical connections.

2. Disconnect electrical cables from light
transformer.

3. Remove two screws and light transformer (Fig.

11).

4. Reverse procedure to install.

Fig. 9

Page 11 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 11

TRANSFORMER - PRIMARY

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.
NOTE: Document all electrical connections.

2. Disconnect electrical cables from primary
transformer.

3. Remove fasteners and primary transformer (Fig.

12).

4. Reverse procedure to install.

Fig. 12

TRANSFORMER - VENT MOTOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.
NOTE: Document all electrical connections.

2. Disconnect electrical cables from vent
transformer.

3. Depress plastic stand-off tabs and remove vent
transformer and circuit board (Fig. 13).

4. Reverse procedure to install.

F45614 Rev. A (0219) Page 12 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 13

CONTACTOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

NOTE: There are two contactors. Ks is a safety

contactor. Kr controls cavity heating.

1. Remove TOP COVER
NOTE: Document all contactor electrical

connections.

2. Disconnect all wires from contactor.

3. Remove contactor Ks (1, Fig. 14) as follows:

A. Use a screw driver to push contactor

towards front of oven until it releases from
mounting base.

Fig. 14

B. Rotate contactor towards back of oven.

C. Lift contactor base tabs out of mounting

plate slot.

4. Remove contactor Kr (2, Fig. 14) as follows:

A. Use a screw driver to push contactor

towards back of oven until it releases from
mounting base.

B. Rotate contactor towards front of oven.

C. Lift contactor base tabs out of mounting

plate slot.

5. Remove ANTI-INTERFERENCE FILTER from
contactor.

6. Reverse procedure to install.

ANTI-INTERFERENCE FILTER

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTACTOR.

3. Remove anti-interference filter (2, Fig. 15) from
contactor (1).

4. Reverse procedure to install.

Page 13 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

5. Remove fasteners and axial fans (Fig. 17) from
frame.

Fig. 15

AXIAL FANS

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.
NOTE: Access to axial fans is improved if control

panel is removed.
NOTE: Document all electrical connections.

3. Disconnect electrical wires from axial fans.

4. Remove fasteners and fan deflector (Fig. 16)
from electronic mounting plate.

Fig. 17

6. Remove fasteners and separate axial fans (Fig.

18).

Fig. 18

7. Reverse procedure to install.

Fig. 16

F45614 Rev. A (0219) Page 14 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

CAPACITOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.

NOTE: Access to electronics mounting panel
fasteners is improved if control panel is removed.

3. Remove both AXIAL FANS.

4. Remove capacitor cover (2, Fig. 19).

5. Use shorting probe to discharge capacitor.

NOTE: Document all electrical connections.

Fig. 20

6. Disconnect electrical wires / spade lugs (1, Fig.

19) from capacitor.

Fig. 19

7. Remove bolts that secure electronics mounting
plate to frame.

8. Lift up left side of electronics mounting plate (2,
Fig. 20) and loosen nut (1) that secures capacitor
to electronics mounting plate.

CONVECTION FAN

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

To prevent damage, place cardboard on cavity
surfaces during procedure.

1. Open oven door.
NOTE: Pull baffle plate out from bottom so water

dispenser tube (2, Fig. 21) disengages from fluid
manifold.

2. Remove bolts, washers, and baffle plate (1, Fig.

21) from oven cavity.

9. Slide capacitor out of electronics mounting plate.

10. Reverse procedure to install.

Page 15 of 91 F45614 Rev. A (0219)

Fig. 21

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

3. Remove bolt, lock washer, atomizer, and flat
washer (Fig. 22) from blower motor shaft.

Fig. 22

NOTE: A M6x40 socket head screw must be used

with puller to avoid damage to motor shaft.

4. Thread M6x40 socket head screw into motor
shaft until it seats in shaft.

5. Place puller over blower fan hub. Ensure arms (2,
Fig. 23) engage hub properly.

CONVECTION FAN MOTOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures. There may be
multiple circuits. Be sure all circuits
are disconnected.

1. Remove baffle plate.

2. Remove TOP COVER and BACK COVER.

3. Remove CONVECTION FAN.

4. Disconnect connector from motor harness
connector (Fig. 24).

5. Remove motor harness connector from

NOTE: Motor shaft seal (2, Fig. 25) and wear ring (1)
should also be replaced when blower motor is
replaced.

Fig. 23

6. Rotate puller shaft (1, Fig. 23) to break blower fan
free of motor shaft.

7. Remove puller from blower fan.

8. Remove bolt from motor shaft.

NOTE: Hold blower fan while tightening bolt.

9. Reverse procedure to install.

F45614 Rev. A (0219) Page 16 of 91

6. Reverse procedure to install.

Fig. 24

electronics mounting plate.

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 25

HEATING ELEMENT

4. Remove BACK COVER.
NOTE: Use wrench to hold backing nut (1, Fig. 26) in

place when removing leads / nuts (2) from heating
elements.

NOTE: Document all electrical connections.

5. Disconnect electrical leads from heating
element.

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

To prevent damage, place cardboard on cavity
surfaces during procedure.

1. Open oven door.
NOTE: Pull baffle plate out from bottom so water

dispenser tube (2, Fig. 26) disengages from fluid
manifold

2. Remove bolts, washers, and baffle plate (1, Fig.

26) from oven cavity.

Fig. 27

6. Remove nut (Fig. 28) that secures heating
element spacer to oven cavity.

Fig. 28

Fig. 26

3. Remove TOP COVER.

7. Remove screws that secure heating element
flange and gasket to oven cavity.

NOTE: It is recommended to remove blower fan to
ease heating element installation.

8. Pull heating element and gasket out from oven
cavity.

Page 17 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

9. Reverse procedure to install.
NOTE: When reinstalling, place spacer over stud and

loosely install nut to support heating element.

VENT MOTOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Disconnect harness connector from vent motor.

3. Loosen bolt that secures coupling (2, Fig. 29) to
vent motor shaft (1).

Fig. 29

4. Remove nuts, washers, and vent motor from
oven frame.

Fig. 30

CAVITY TEMPERATURE PROBE

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.
NOTE: Document all electrical connections.

2. Disconnect cavity temperature probe lead from
routing clips and output control assembly
connector B1.

3. Remove holding clip (2, Fig. 31) and cavity
temperature probe (1).

4. Reverse procedure to install.

Make sure coupling shaft is properly seated and
engaged in vent or oven will not operate properly.

NOTE: Make sure coupling shaft bolt seats against
flat of vent motor shaft.

5. Reverse procedure to install. Rotate coupling
shaft (1, Fig. 30) to make sure vent (2) goes up
and down.

F45614 Rev. A (0219) Page 18 of 91

Fig. 31

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

HIGH LIMIT SWITCH

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Cut tape and into insulation behind high limit
bracket.

3. Cut insulation in front of the bracket.

Fig. 34

7. Install high limit switch (2, Fig. 34) to bracket.

8. Insert capillary bulb into bracket.

Fig. 32

4. Remove mounting bracket mounting screws.

Fig. 33

5. Remove bracket.

6. Disengage the capillary bulb (1, Fig. 34).

Fig. 35

9. Insert bracket into insulation cut.

10. Verify capillary bulb is flush against exterior top
cavity surface.

11. Set bracket in insulation and secure to
installation with heat tape.

Fig. 36

12. Cut in insulation should be completely covered.

NOTE: Make sure insulation blanket covers capillary
bulb and is sealed by high temperature tape.

13. Reverse procedure to install.

Page 19 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

LED STRIP

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Open door.

2. Remove INTERNAL GLASS DOOR.

3. Remove screws and inner panel (1, Fig. 37).

Fig. 38

Fig. 37

4. Remove screws and LED strip (2, Fig. 37) from
door.

NOTE: Document all electrical connections.

5. Disconnect electrical leads from LED strip.

6. Reverse procedure to install.

INTERNAL GLASS DOOR

1. Open door.

DOOR LATCH

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Open door.

2. Remove INTERNAL GLASS DOOR.

3. Remove screws, retaining clip, and inner panel
(Fig. 39).

2. Press on retaining clips and open inner glass
door (Fig. 38).

3. Lift glass door off mounting pins.

4. Reverse procedure to install.

4. Remove screws and door handle.

5. Remove screw and latch mechanism (1, Fig.

F45614 Rev. A (0219) Page 20 of 91

Fig. 39

40) from door handle (2).

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 40

6. Reverse procedure to install.

DOOR SWITCH

DOOR CATCH

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Open door.

2. Remove screws.

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove CONTROL PANEL.

NOTE: Document all electrical connections.

3. Disconnect electrical leads from control output
assembly connector.

4. Remove screw, washers, clamp (1, Fig. 41) and
door sensor (2) from oven frame.

5. Reverse procedure to install.

Fig. 42

3. Remove door catch and under plate, remove
shims.

Fig. 41

Fig. 43

4. Reverse procedure to install.

Page 21 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

When installing, verify shims are properly positioned.

DOOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Open door.

2. Remove TOP COVER

3. Remove CONTROL PANEL.

4. Remove INTERNAL GLASS.

5. Remove screw (1, Fig. 44) and washer.

Fig. 44

6. Cut and remove wire tie from LED cable.

Fig. 45

7. Note and disconnect LED wiring (1, Fig. 46) and
remove from lighting transformer.

Fig. 46

8. Remove cable from top of oven.

9. Lift door upper-hinge assembly, while carefully
holding door.

10. Remove door.

11. Reverse procedure to install.

F45614 Rev. A (0219) Page 22 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Verify two brass spacers (Fig. 47) are installed
correctly with internal glass.

Fig. 48

FLOW METER

Fig. 47

FILTERED WATER PRESSURE

RESTRICTOR

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove BACK COVER.

3. Shut off filtered and unfiltered water supplies.

4. Disconnect filtered water supply from oven inlet
filter assembly (1, Fig. 48).

5. Unthread inlet filter assembly (1, Fig. 48) from
filtered water flow restrictor (2).

6. Disconnect hose from filtered water flow
restrictor.

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Shut off filtered and unfiltered water supplies.

3. Disconnect hoses from flow meter (Fig. 49).
NOTE: Document electrical connections.

4. Disconnect electrical cable from flow meter.

5. Remove fastener and flow meter from mounting
bracket.

6. Reverse procedure to install.

7. Remove fasteners and filtered water flow
restrictor from frame.

8. Reverse procedure to install.

Page 23 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 49

DETERGENT PUMP

• Dispose of the product and its container as
hazardous waste.

1. Remove TOP COVER.

2. Shut off filtered and unfiltered water supplies.

3. Disconnect hoses from detergent pump (Fig.

50).

NOTE: Document electrical connections.

4. Disconnect electrical wires from detergent pump.

5. Remove screws, washers, and detergent pump
from mounting bracket.

6. Reverse procedure to install.

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

Remember the dangers identified on the safety
data sheet for detergent:

• Harmful if swallowed.

• Avoid direct contact with these products.

• Can result in serious burns.

• Wear protective clothing, gloves and hermetic
protective goggles in accordance with the safety
data sheet.

• Detergent will cause irritation and possible burns
if in direct contact with the skin or eyes.

• Irritates the respiratory tracts.

• Risk of serious eye lesions.

• Do not inhale the mist or spray.

• Irritates the eyes.

• If case of contact with eyes rinse immediately
with plenty of water and seek medical advice.

Fig. 50

3-WAY SOLENOID VALVE

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

NOTE: 3-way solenoid valve contains valves Yi, Yf,

and Yn.

1. Remove TOP COVER.

2. Shut off filtered and unfiltered water supplies.

3. Remove flow motor hose (Fig. 51).

• Danger of eye and skin irritation or acid burns.

• In the event of an accident or sickness seek
immediate medical attention.

F45614 Rev. A (0219) Page 24 of 91

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 51

NOTE: Document all electrical connections.

4. Disconnect electrical cable from 3-way valve.

5. Remove fasteners and 3-way valve from
mounting bracket.

6. Reverse procedure to install.

SOLENOID VALVE Yv

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove BACK COVER.

3. Shut off filtered and unfiltered water supplies.

4. Disconnect electrical cable from solenoid valve
Yv (Fig. 52).

Fig. 52

5. Remove hose clamps and hoses from solenoid
valve Yv.

6. Reverse procedure to install.

SOLENOID VALVE Yc

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Remove TOP COVER.

2. Remove BACK COVER.

3. Shut off filtered and unfiltered water supplies.

4. Disconnect facility unfiltered water supply from
solenoid valve Yc (Fig. 53).

5. Disconnect hose from solenoid valve Yc.

NOTE: Document electrical connections.

6. Disconnect electrical cable from solenoid valve
Yc.

7. Remove fasteners and solenoid valve Yc from
frame.

8. Reverse procedure to install.

Page 25 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS

Fig. 53

F45614 Rev. A (0219) Page 26 of 91

MINI JET COMBI OVEN - SERVICE PROCEDURES AND ADJUSTMENTS

SERVICE PROCEDURES AND ADJUSTMENTS

HEATING ELEMENT TEST

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Disconnect supply power.

2. Remove BACK COVER.

3. Check resistance.

• Remove one wire on one side of the element
to prevent a false reading.

• Verify 17.7 ohms.

Fig. 55

Fig. 54

4. Check continuity on new heating elements
before installing as shown in Fig. 55, Fig. 56, and
Fig. 57.

Fig. 56

Fig. 57

Page 27 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SERVICE PROCEDURES AND ADJUSTMENTS

5. Install covers and verify operation.

SOLENOID VALVES

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

1. Disconnect supply power.

2. Locate solenoid to check.

• Remove TOP COVER to access Yi (pink),

Yn (green), and Yf (blue).

• Remove BACK COVER to access Yellow
and Brown.

Fig. 60

• Disconnect and verify readings in Table 7
table below.

TOP

Color Connection Reading

Green Yn 2900 ohms

Blue Yf 2898 ohms

Pink Yi 2901 ohms

Fig. 58

• Disconnect and verify readings in Table 6
table below.

Fig. 59

BACK

Color Reading

Yellow 3.62 kilohms

Brown 3.84kilohms

F45614 Rev. A (0219) Page 28 of 91

MINI JET COMBI OVEN - SERVICE PROCEDURES AND ADJUSTMENTS

CONVECTION MOTOR RESISTANCE

Page 29 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SERVICE PROCEDURES AND ADJUSTMENTS

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1. Disconnect supply power.

2. Remove TOP COVER.

3. Unplug convection fan motor.

4. Test connections. Verify 56Ω.

Fig. 61

F45614 Rev. A (0219) Page 30 of 91

MINI JET COMBI OVEN - SERVICE PROCEDURES AND ADJUSTMENTS

Fig. 62

Page 31 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

ELECTRICAL OPERATION

COMPONENT FUNCTION

Axial Fans (Mt1 and

Mt2) ...................

Blower Motor (M1) .... Used to rotate blower fan inside of oven cavity. The motor has an internal thermal

Capacitor (Cm1) ...... Provides starting boost to blower motor.

Cavity Temperature

Sensor (B1) ...........

Cleaning Port ......... Supplies detergent / water to clean cooking compartment.

Contactor (Kr) ........ Heat control contactor. Supplies power to heating elements as long as contactor Ks is

Contactor (Ks) ........ Safety contactor. Opens when commanded by an error condition.

Core Sensor Probe

(Xsc) ..................

Detergent Pump

(Fdn) ..................

Door Sensor (Sp) ..... Reed switch located above door and connected to the output control assembly. Opens

Encoder (Part of

Af) ....................

Provides cooling air flow to oven electronics.

protection device (Fm1) that opens if the motor overheats. It is self-resetting once the
motor cools.

RTD style monitors the oven cavity temperature and provides an input to the output
control assembly.

closed.

Optional temperature probe used to determine internal temperature of item being cooked.

Supplies detergent to cooking compartment. The pump has a thermal protection device
(FPdn) that opens if the pump overheats. It is self-resetting once the pump cools.

when the door opens.

Provides mechanical input to touch panel / display assembly.

Flow Meter (Bd) ....... Measures filtered water supply flow rate.

Fuse F1 ............... 3.15-amp fuse located in output control assembly. Protects:

• Solenoid valve Yv (drain cleaning valve).

• Vent motor transformer Tmo and vent motor Mo.

• 3-way solenoid valve Yn (cleaning valve).

• 3-way solenoid valve Yf (cooling valve).

• Detergent pump temperature sensor FPdn.

• Detergent pump Pdn.

Fuse F2 ............... 1-amp time delay fuse located in output control assembly. Protects:

• LED lighting Ee.

• Lighting transformer Te.

Fuse F3 ............... 10-amp fuse located in output control assembly. Protects blower motor M1.

Fuse F4 ............... 0.2-amp ultra fast fuse located in output control assembly. Protects:

• 3-way solenoid valve Yi (injection / steam valve).

• Solenoid valve Yc (condensate cooling valve).

Fuse F5 ............... 3.15-amp fuse located in output control assembly. Protects:

• Blower motor over-temperature sensor Fm1.

F45614 Rev. A (0219) Page 32 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

• High-limit switch Fc.

• Safety contactor Ks.

• Heat Control contactor Kr.

• Axial fans Mt1 and Mt2.

Fuse F6 ............... 2-amp fuse located in fuse block. Protects oven against input power disruptions.

Fuse F7 ............... 1-amp time delayed fuse located in fuse block. Protects output control assembly.

Fuse F8 ............... 0.25-amp fuse located on vent motor transformer board. Protects vent motor transformer /

motor.

Fuse F9 ............... 10-amp fuse located in fuse block. Protects blower motor M1.

Heating Elements

(RC1) .................

High Limit Switch

(Fc) ...................

Injection Port ......... Supplies filtered water to cooking compartment for steam generation.

Lighting Transformer

(Te) ...................

Output Control

Assembly (AR) .......

Pressure Restrictor ... Limits filtered water supply pressure to 43 Psi.
Primary Transformer

(Ta) ...................

Solenoid Valve (Yc) ... Supplies water to condensate drain when open (water flow).
Solenoid Valve (Yf) ... Part of 3-way valve. Supplies cooling water to cooking compartment injection port when

Resistance-type heating elements. Located in rear of cooking compartment. Elements
surround blower fan.

Monitors cavity internal temperature. When temperature exceeds 608 °F, it opens and
removes power to the heating elements.

Reduces / converts 230 VAC power to 15 VDC for use by lighting LEDs.

Incorporates two primary components:

• Control board.

• Relay board.

The control board monitors physical input signals and operator commands. It then signals
the relay board to change various components states (valves open / close, pumps run,
etc.).

Converts facility input voltage to 230 VAC for use by oven electronic / electrical
components.

open (water flow).

Solenoid Valve (Yi) ... Part of 3-way valve. Supplies water to cooking compartment injection port for steam

generation when open (water flow).

Solenoid Valve

(Yn) ...................

Solenoid Valve (Yv) ... Supplies water /detergent to cooking compartment cleaning port when closed (no water

Suppressors (Zr /

Zs) ....................

Touch Panel / Display

Assembly (Af) ........

Vent Motor (Mo) ...... Used to position a restrictor plate in the vent to provide additional control of cavity

Vent Motor
Transformer (Tmo) ...

Part of 3-way valve. Supplies water to mix with detergent for cooking compartment
cleaning when open (water flow).

flow). Supplies water / detergent to condensate drain when open (water flow).

An AC filter network that provides relay contact protection, noise circuit reduction, and
EMI/RFI reduction. It is placed across the contactor coil.

Acts as primary operator input and monitoring interface. Provides both mechanical (via
encoder) and touch screen inputs. It provides monitoring of operational state as well.

temperature.

Reduces 230 VAC to 24 VAC for use by vent motor.

Page 33 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

USB Port .............. Used to allow updating of software / firmware. Also allows for downloading of preset

cooking instructions.

COMPONENT LOCATION

Fig. 63

Fig. 63

Item Nomenclature

1 Flow Meter (Bd)

2 Output Control Assembly (Ar)

F45614 Rev. A (0219) Page 34 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 63

Item Nomenclature

3 Core Sensor Probe (Xsc) Port

4 External USB Port

5 Latch

6 Door Sensor (Sp)

7 Lighting Transformer (Te)

8 Encoder (part of Af)

9 Touch Panel / Display Assembly (Af)

Page 35 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 64

Fig. 64

Item Nomenclature

1 Vent Motor (Mo)

2 Cavity Temperature Sensor (B1)

3 Detergent Pump (Pdn)

4 Door Seal

5 Oven Rack Holders

F45614 Rev. A (0219) Page 36 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 64

Item Nomenclature

6 Door Hinges

7 Axial Fans (Mt2)

8 High Temperature Limit Switch (Fc) Capillary Bulb

Fig. 65

Page 37 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 65

Item Nomenclature

1 Primary Transformer (Ta)

2 Contactor (Ks) / Suppressor Zs

3 Contactor (Kr) / Suppressor Zr

4 Fuse F6

5 Fuse F7

6 Fuse F9

7 Fuse F8

8 Vent Motor Transformer (Tmo)

9 Convection Fan Motor (Mt1) and Connector

F45614 Rev. A (0219) Page 38 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 66

Fig. 66

Item Nomenclature

1 High Temperature Limit Switch (Fc)

2 Input Power Terminals

3 3-Way Solenoid Valve (Yi, Yf, Yn)

4 Solenoid Valve (Yv)

5 Solenoid Valve (Yc)

6 Water Supply Pressure Restrictor (43 PSI)

Page 39 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 66

Item Nomenclature

7 Water Supply Filter

8 Drain Connection

Fig. 67

Fig. 67

Item Nomenclature

1 Heating Elements (Rc)

F45614 Rev. A (0219) Page 40 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 67

Item Nomenclature

2 Water Injection Port

3 Cleaning Injection Port

4 Baffle Plate

5 Blower Fan

Drain Cap

6

Do not remove. If drain cap is removed, drain tube will

separate from cavity floor and will cause leaks.

Page 41 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 68

Fig. 68

Item Nomenclature

1 Inner Door

2 Door Latch Mechanism

3 LED Strip

4 Control Knob

F45614 Rev. A (0219) Page 42 of 91

MINI JET COMBI OVEN - ELECTRICAL OPERATION

OUTPUT CONTROL ASSEMBLY

Refer to table below and Fig. 69 for output control assembly connection information.

Terminal Associated Fuse Input / Output Function

1 NA Input AC line voltage (L2)

2 NA N/A N/A

3 NA Input AC line voltage (L1)

4 F5 Output Axial fan Mt1 control

5 F2 Output LED cavity lighting control

Axial fan Mt2 control

Convection Fan Motor M1 control

7 F5 Output

Convection Fan Motor M1 control (high

8 F5 Output Heater contactor Kr control

9 F4 Output Condensate valve Yc control

10 F4 Output Injection valve Yi control

12 F7 Input Stepped down AC power

13 F9 (External) / F3 (Internal) Input AC line voltage (L2)

15 F3 (Internal) Output

17 F3 (Internal) Output

24 F1 Output Detergent supply valve Yv

25 F1 (Internal) / F8 (External) Output Vent motor Mo

27 F1 (Internal) Output Cleaning valve Yn

29 F1 (Internal) Output Detergent pump Pdn

30 F1 (Internal) Output Cooling valve Yf

34 NA Input Stepped down AC power

B1 NA Input Cavity temperature probe B1

BD- / BDs / BD+ NA Input Flow meter signal

E2 / E2b / E2c/ COM NA Input Core probe

Sp NA Input Door position

(thermal switch Fm1)

limit switch Fc)

Safety contactor Ks control

Convection Fan Motor M1 power

(clockwise rotation)

Convection Fan Motor M1 power

(counter-clockwise rotation)

Page 43 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - ELECTRICAL OPERATION

Fig. 69

F45614 Rev. A (0219) Page 44 of 91

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

SEQUENCE OF OPERATION

CONDITIONS

Unit connected to facility power and properly
grounded.

• Supply voltage (208 or 240 VAC, single or three
phase) connected to supply terminal strip (Xq).

• Supply voltage and neutral from terminal strip
(Xq) to supply filter (Za).

• Supply voltage from supply terminal strip (Xq) to
safety contactor (KS).

• Supply voltage from supply terminal strip (Xq) to
output control assembly (Ar) terminal 1.

• Supply voltage neutral from supply terminal strip
(Xq) to output control assembly (Ar) terminal 3.

• Supply voltage through fuse (F6) and terminal
strip (Xb-1) to primary transformer (Ta).

• Primary transformer (Ta) output (230 VAC)
connected through fuse (F7) to output control
assembly (Ar) terminal 12.

• Primary transformer (Ta) neutral output
connected through terminal strip Xb-2, 3, 4, and
5 to various components and output control
assembly (Ar) terminal 34.

Unit connected to facility cold water supply.

• Supply water (30-60 psi) connected through
input water filter and pressure restricter to flow
meter (Bd).

• Supply water connected from flow meter (Bd) to
injection valve (Yi), cooling valve (Yf), and
cleaning valve (Yn).

• Supply water connected to condensate cooling
valve (Yc).

Unit connected to drain.

• Drain connected to condensate drain fitting.

Unit connected to detergent supply.

• Detergent connected to detergent pump (Pdn).

3. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V .

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage Present, 230V.

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) closed.

• Voltage Present limit switch (Fc)
closed.

• Terminal 8: Voltage NOT Present, 230V.

• Heat control contactor (Kr) open.

• Terminal 9: Voltage NOT Present, 230V.

• Condensate valve (Yc) closed (no
flow).

• Terminal 10: Voltage NOT Present.

• Injection valve (Yi) closed (no flow),
230V.

• Terminal 24: Voltage NOT Present.

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage NOT Present.

• Vent motor (Mo) stationary.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

• Detergent pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow).

4. Output control assembly (Ar) inputs are as
follows:

POWER ON

1. Power, water, drain, and detergent are
connected as noted in CONDITIONS.

2. All fuses are good.

• Terminal B1: Cavity temperature sensor
(B1).

• Resistance dependent on cavity

temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

Page 45 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

• If core probe not connected - 0 VAC.

• If core probe connected - voltage
dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• No supply water flow: 0 Hz.

• Terminals Sp: door sensor (Sp).

• Door open - infinite Ohms.

• Door closed - 0 Ohms.

5. No supply voltage to heating elements.
NOTE: Convection Fan Motor (M1) rotates whenever

safety contactor (Ks) is closed.

6. Convection Fan Motor (M1) rotating.

HEAT

1. Power, water, drain, and detergent are
connected as noted in CONDITIONS.

2. All fuses are good.

3. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V.

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage Present, 230V

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) closed.

• Voltage Present limit switch (Fc)
closed.

• Terminal 8: Voltage Present / Voltage NOT
Present.

• Heat control contactor (Kr) opens and

closes dependent on temperature.

• Terminal 9: Voltage NOT Present.

• Condensate valve (Yc) closed (no

flow).

• Terminal 10: Voltage NOT Present.

• Injection valve (Yi) closed (no flow).

• Terminal 24: Voltage NOT Present.

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage Present/Voltage NOT
Present.

• Vent motor (Mo) operates as required

by software program.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

• Detergent pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow ).

4. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

• If core probe not connected - 0 VAC.

• If core probe connected - voltage

dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• No supply water flow: 0 Hz.

• Terminals Sp: Door sensor (Sp).

• Door must be closed - 0 Ohms.

5. Heat control contactor (Kr) is pulsed by output
control assembly (Ar) terminal 8. The pulse rate
is determined by internal electronics dependent
on the cavity temperature as determined by
cavity temperature sensor B1.

6. Supply voltage is applied (pulsed) to heating
elements through heat control contactor (Kr).

A. At initial heating, supply voltage pulse rate

is low (long ON time, short OFF time).

B. As temperature rises, supply voltage pulse

rate increases (shorter ON time and / or
longer OFF time).

C. At desired temperature, supply voltage is

applied / removed as required to keep the
temperature within the specified range.

NOTE: Convectional fan motor (M1) operates
whenever safety contactor (Ks) is closed).

7. Convectional fan motor (M1) rotating.

F45614 Rev. A (0219) Page 46 of 91

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

HEAT AND HUMIDITY

1. Power, water, drain, and detergent are
connected as noted in CONDITIONS.

2. All fuses are good.

3. Heat operation is as noted in HEAT.

4. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V.

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage Present, 230V.

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) closed.

• High limit switch (Fc) closed.

• Terminal 8: Voltage Present (230V) /

Voltage NOT Present.

• Heat control contactor (Kr) opens and
closes dependent on temperature.

• Terminal 9: Voltage Present (230V) /
Voltage NOT Present..

• Cooling valve (Yf) opens and closes
(Voltage NOT Present at 17 oz. per
minute) as directed by software
program.

5. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

• If core probe not connected - 0 VAC.

• If core probe connected - voltage

dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• Supply water flow - frequency

dependent on flow rate.

• Terminals Sp: door sensor (Sp).

• Door must be closed - 0 Ohms.

NOTE: Convection motor (M1) rotates whenever
safety contactor (Ks) is closed.

6. Convection motor (M1) rotating.

CLEAN

• Condensate valve (Yc) closed (no
flow).

• Terminal 10: Voltage Present, 230V.

• Injection valve (Yi) closed (flow at 8.5
oz. per minute).

• Terminal 24: Voltage NOT Present.

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage Present (24V) /
Voltage NOT Present.

• Vent motor (Mo) operates as required

by software program.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

• Detergent pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

1. Power, water, drain, and detergent are
connected as noted in POWER ON.

2. All fuses are good.

3. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V.

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage Present, 230V.

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) closed.

• High limit switch (Fc) closed.

• Terminal 8: Voltage NOT Present.

• Heat control contactor (Kr) open.

• Terminal 9: Voltage NOT Present.

Page 47 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

• Condensate valve (Yc) closed (no
flow).

• Terminal 10: Voltage Present, 230V.

• Injection valve (Yi) closed (no flow).

• Terminal 24: Voltage NOT Present.

• Cleaning valve (Yv) open (flow at 169
oz. per minute).

• Terminal 25: Voltage NOT Present.

• Vent motor (Mo) stationary.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage Present, 230V.

• Detergent Pump (Pdn) operating.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow).

4. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

2. All fuses are good.

DOOR OPEN

1. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage NOT Present, 230V.

• Axial fan (Mt1) not rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage NOT Present.

• Axial fan (Mt2) not rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) open.

• Voltage Present (230V) . limit switch
(Fc) closed.

• Terminal 8: Voltage NOT Present.

• Heat control contactor (Kr) open.

• Terminal 9: Voltage NOT Present.

• Condensate valve (Yc) closed (no
flow).

• Terminal 10: Voltage NOT Present.

• Injection valve (Yi) closed (no flow).

• Terminal 24: Voltage NOT Present.

• If core probe not connected - 0 VAC.

• If core probe connected - voltage
dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• Supply water flow - frequency
dependent on flow rate.

• Terminals Sp: door sensor (Sp).

• Door must be closed - 0 Ohms.

5. Water / detergent dispensed into cavity and flows
into condensate drain.

6. Water / detergent flows from condensate drain
into facility drain.

NOTE: Convectional Fan motor (M1) rotates
whenever saftey contactor (Ks) is closed.

7. Convectional Fan motor (M1) rotating.

OTHER

1. Power, water, drain, and detergent are
connected as noted in CONDITIONS.

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage NOT Present.

• Vent motor (Mo) stationary.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

• Detergent Pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow).

2. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

• If core probe not connected - 0 VAC.

F45614 Rev. A (0219) Page 48 of 91

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

• If core probe connected - voltage
dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• No supply water flow: 0 Hz.

• Terminals Sp: door sensor (Sp).

• Door open - infinite Ohms.

3. With contactors Kr and Ks open, no supply
voltage to heating elements.

NOTE: Convectional Fan motor (M1) rotates
whenever safety contactor (Ks) is closed.

4. Convectional Fan motor (M1) not rotating.

CAVITY OVER TEMPERATURE

1. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V.

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

2. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

• If core probe not connected - 0 VAC.

• If core probe connected - voltage

dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• No supply water flow: 0 Hz.

• Terminals Sp: door sensor (Sp).

• Door closed - 0 Ohms.

3. With contactors Kr and Ks open, no supply
voltage to heating elements.

NOTE: Convectional Fan motor (M1) rotates
whenever safety contactor (Ks) is closed.

• Terminal 7: Voltage Present, 230V.

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) closed.

• Safety contactor (Ks) open.

• Voltage Present, limit switch (Fc) open.

• Terminal 8: Voltage NOT Present.

• Heat control contactor (Kr) open.

• Terminal 9: Voltage NOT Present.

• Condensate valve (Yc) closed (no
flow).

• Terminal 10: Voltage NOT Present.

• Injection valve (Yi) closed (no flow).

• Terminal 24: Voltage NOT Present.

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage NOT Present.

• Vent motor (Mo) stationary.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

4. Convectional Fan motor (M1) not rotating.

CONVECTIONAL FAN MOTOR OVER
TEMPERATURE

1. Output control assembly (Ar) outputs are as
follows:

• Terminal 4: Voltage Present, 230V.

• Axial fan (Mt1) rotating.

• Terminal 5: Voltage Present, 15V.

• LED lights on.

• Terminal 7: Voltage Present.

• Axial fan (Mt2) rotating.

• Thermal switch (Fm1) open.

• Safety contactor (Ks) open.

• Voltage Present. limit switch (Fc)
closed.

• Terminal 8: Voltage NOT Present.

• Heat control contactor (Kr) open.

• Terminal 9: Voltage NOT Present.

• Condensate valve (Yc) closed (no
flow).

• Detergent pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow).

• Terminal 10: Voltage NOT Present.

• Injection valve (Yi) closed (no flow).

• Terminal 24: Voltage NOT Present.

Page 49 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SEQUENCE OF OPERATION

• Cleaning valve (Yv) closed (no flow).

• Terminal 25: Voltage NOT Present.

• Vent motor (Mo) stationary.

• Terminal 27: Voltage NOT Present.

• Wash valve (Yn) closed (no flow).

• Terminal 29: Voltage NOT Present.

• Detergent pump (Pdn) stationary.

• Terminal 30: Voltage NOT Present.

• Cooling valve (Yf) closed (no flow).

2. Output control assembly (Ar) inputs are as
follows:

• Terminal B1: cavity temperature sensor

(B1).

• Resistance dependent on cavity
temperature.

• Terminals E2, E2b, E2c: core probe
temperature sensor (Xsc).

• If core probe not connected - 0 VAC.

• If core probe connected - voltage

dependent on probe temperature.

• Terminals Bd+, Bds, Bd-: flow meter (Bd).

• No supply water flow: 0 Hz.

• Terminals Sp: door sensor (Sp).

• Door closed - 0 Ohms.

3. With contactors Kr and Ks open, no supply
voltage to heating elements.

NOTE: Convectional Fan motor (M1) rotates
whenever safety contactor (Ks) is closed.

4. Convectional Fan motor (M1) not rotating.

F45614 Rev. A (0219) Page 50 of 91

MINI JET COMBI OVEN - WIRING / FLUID DIAGRAMS

WIRING / FLUID DIAGRAMS

WIRING DIAGRAM

Fig. 70

Page 51 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - WIRING / FLUID DIAGRAMS

Fig. 71

F45614 Rev. A (0219) Page 52 of 91

MINI JET COMBI OVEN - WIRING / FLUID DIAGRAMS

FLUID DIAGRAM

Fig. 72

Reference Designator Nomenclature

Bd Flow Meter

Pdn Detergent Pump

Yc

Yf Cooling Valve Solenoid

Operation Yi Yf Yn Yv Yc Pump

Injection

Cooling

Cleaning

Drain

Open (L1 Flow
@ 8.5 Oz / Min)

CLOSED (No
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

Condensate Cooling
Valve Solenoid

CLOSED (No
Flow)

OPEN ( L2
flow @ 17 Oz /
Min)

CLOSED (No
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

OPEN (L3
Flow @ 169
Oz / Min)

CLOSED (No
Flow)

Reference Designator Nomenclature

Yi Injection Valve Solenoid

Yn Cleaning Valve Solenoid

Yv

CLOSED (No
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

OPEN (Gravity
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

CLOSED (No
Flow)

OPEN (L4
Flow @ 27 Oz /
min

Detergent Supply Valve
Solenoid

Inactive

Inactive

Active

Inactive

Page 53 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

DISPLAY SCREEN CONTROLS AND INFORMATION

AUTO SCREEN CONTROLS AND

INFORMATION

The AUTO screen (Fig. 73) provides user access to
pre-programmed functions, settings, and recipes.
Additional information regarding the features and
functions of this screen is available in the USER
GUIDE.

functions of this screen is available in the USER
GUIDE.

The TOOL BOX screen (Fig. 75) provides access to

Fig. 73

NOTE: Units are shipped with zero "my recipes" so

this may be empty.

additional screens used to configure the oven as well
as user documentation.

MANUAL SCREEN CONTROLS

AND INFORMATION

The MANUAL screen (Fig. 74) provides user access
to manually controlled functions and settings.
Additional information regarding the features and

F45614 Rev. A (0219) Page 54 of 91

Fig. 74

TOOL BOX SCREEN CONTROLS

AND INFORMATION

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

• Service and Culinary contact phone numbers.
This information is configured in Client
Parameters.

• Scheduled service information. The service
periodicity is configured in Technical
Parameters.

In addition, the oven's serial number, output control
software version, and touch screen display software
version are provided as well.

AUTO CLEANING SCREEN

CONTROLS AND INFORMATION

Checking / setting auto cleaning parameters is
required if:

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.

Fig. 75

The primary Tool Box screen provides:

• Auto clean schedule (if enabled). See AUTO
CLEANING SCREEN CONTROLS AND
INFORMATION for information on configuring
the schedule.

• Manual Cleaning icon (if enabled).

• Access to the User Manual. See USER MANUAL
INFORMATION for additional information.

• Access to the Data Exchange screen. See DATA
EXCHANGE CONTROLS AND INFORMATION
for additional information.

• Access to the Client Parameters screens. See
CLIENT PARAMETER SCREEN CONTROLS
AND INFORMATION for additional information.

• Access to Installation Parameters screen. See
INSTALLATION PARAMETERS SCREEN
CONTROLS AND INFORMATION for additional
information.

1. Access the Auto Cleaning screen as follows:
A. Select TOOL BOX (1, Fig. 76) icon.

Fig. 76

B. If Rinsing (2, Fig. 76) and Cleaning (3)

icons are shown, select Auto Cleaning icon
(4) to activate login screen.

• Access to Technical Parameters screens. See
TECHNICAL PARAMETERS SCREEN
CONTROLS AND INFORMATION for additional
information.

C. On login screen, enter password (CHEF)

(1-4, Fig. 77).

D. Select √ (5, Fig. 77) icon.

Page 55 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 77

2. Once the password is entered, the Auto
Cleaning screen Fig. 78 will become active.

3. Set / change Auto Cleaning screen parameters
by:

• Selecting the CLEAN icon under the desired

day and toggling the level (Light / Medium /
Intense / None).

• Selecting the HOUR icon and entering the

start time (Hours : Minutes)

Fig. 78

4. If the schedule is valid (able to be performed

based on operating schedule) the Valid icon
turns ON.

5. Press START to save the auto cleaning
schedule.

6. The display returns to the primary TOOL BOX
screen.

MANUAL CLEANING SCREEN

CONTROLS AND INFORMATION

Checking / setting manual cleaning parameters is
required if:

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.

1. Access Manual Cleaning screen as follows:
A. Select TOOL BOX (1, Fig. 79) icon.

F45614 Rev. A (0219) Page 56 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 79

B. If Rinsing icon (2, Fig. 79) and Auto

Cleaning schedule are shown, select
Manual Cleaning icon (4) to activate login

screen..

C. On login screen, enter password (CHEF)

(1-4, Fig. 80).

D. Select √ (5, Fig. 80) icon.

Fig. 80

2. Select the desired cleaning action / time (Fig.

81).

• Pressing RINSING then START icons

initiates a 1.0 second rinse.

• Pressing CLEANING icon provides 4

possible actions:

• LIGHT: a cycle of 11.0 cleaning, 4.0

seconds rinsing, then draining.

• MEDIUM: a cycle of 20.0 cleaning, 4.0

seconds rinsing, then draining.

• INTENSE: a cycle of 31.0 cleaning, 4.0

seconds rinsing, then draining.

• PRIMING CLEANING: initiates the

LIGHT cleaning cycle/

3. Press START icon to initiate desired cycle.

4. After cleaning cycle completes, the primary
TOOL BOX screen becomes active.

Page 57 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 81

USER MANUAL INFORMATION

The User Manual screen (Fig. 82 ( provides access
to embedded videos and Frequently Asked Questions
(FAQ).

Fig. 82

DATA EXCHANGE CONTROLS

AND INFORMATION

Checking / setting data exchange information is
required if:

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.

1. Access Data Exchange screen as follows:
A. Select TOOL BOX (1, Fig. 83 ) icon.

F45614 Rev. A (0219) Page 58 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 83

B. Select Data Exchange (2, Fig. 83) icon.
C. Enter password (CHEF) (1-4, Fig. 84).

Fig. 84

D. Select √ (5, Fig. 84) icon.

2. Configure, upload, export, and view data
exchange information (Fig. 85) by selecting the
appropriate icon.

Page 59 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

• Selecting Export icon downloads oven

operational information to a flash drive
inserted in the USB port.

• Selecting VIEW icon activates a screen

to show oven operational information
data.

• Pictures.

• Selecting Upload icon loads photos

from a flash drive inserted in the USB
port.

• Selecting Export icon downloads

photos to a flash drive inserted in the
USB port.

• Selecting VIEW icon activates a screen

to show photos.

• User Manual.

• Selecting Export icon downloads user

manual information to a flash drive
inserted in the USB port.

Fig. 85

• HACCP (Hazard Analysis and Critical
Control Point). When set to ON, the oven
records HACCP data for either viewing or
export. When active, the sample time can be
set from 5 to 240 seconds by rotating the
encoder.

• Radio. This feature does not work in this
configuration.

• Recipes.

• Selecting Upload icon loads recipes

from a flash drive inserted in the USB
port.

• Selecting Export icon downloads

recipes to a flash drive inserted in the
USB port.

• HACCP.

• Selecting Export icon downloads

HACCP data to a flash drive inserted in
the USB port.

• Selecting VIEW icon activates the user

manual screen.

• User Profile.

• Selecting Upload icon loads user data

from a flash drive inserted in the USB
port.

• Selecting Export icon downloads user

data to a flash drive inserted in the USB
port.

3. Select Back icon to return to primary TOOL

BOX screen.

CLIENT PARAMETER SCREEN

CONTROLS AND INFORMATION

Checking / setting client parameters is required if:

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.
NOTE: There are three screens associated with client

parameter controls and settings.

1. Access Client Parameters screens as follows:
A. Select TOOL BOX (1, Fig. 86) icon.

• Selecting VIEW icon activates a screen

to show HACCP data.

• Consumptions.

F45614 Rev. A (0219) Page 60 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 86

B. Select Client Parameters (2, Fig. 86) icon.
C. Enter password (CHEF) (1-4, Fig. 87).

Fig. 87

D. Select √ (5, Fig. 87) icon.

2. Set / change screen 1 client parameters (Fig.

88) by either:

• Selecting the icon directly.

• Screen Beep

• Auto Winter / Summer Hour

• Oven Preheat (enable / disable)

• Boiler preheating (Not used in this
configuration)

• Preheating before cooking

• Delta T Mode

• Selecting the icon and rotating the encoder
dial to set the desired value.

• Language

• Brightness

• Sound level

• No. of end of cooking beeps

Page 61 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

• Date / Hr

• Oven Preheat (temperature)

• Hold

• Default core temperature

• Library

• Recipes sort by family

• Screen saver (enable / disable)

• Selecting the icon and rotating the encoder
dial to set the desired value.

• Humidification rate for Regeneration

• Screen saver (after)

Fig. 88

3. Select Next icon to show client parameters

screen 2.

4. Set / change screen 2 client parameters (Fig.

89) by either:

• Selecting the icon directly.

• Default Mode

• Manual Type Mode

• Cooling in MANUAL Mode

• Message (text with keypad entry)

• RECIPES

• Client recipe name (text with
keypad entry)

• Authorization

• Display

F45614 Rev. A (0219) Page 62 of 91

5. Select Next icon to show client parameters

6. Set / change screen 3 client parameters (Fig.

Fig. 89

screen 3.

90) by either:

• Selecting the icon directly.

• Measuring Units

• Convection only

• Auto restart

• Cooling of condensates

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

• Water treatment capacity (reset)

• Rest

• Modify PIN no. (text with keypad entry)

• Selecting the icon and rotating the encoder
dial to set the desired value.

• Prices

• Number of weeks to keep after HACCP

export

• Cleaner container volume

• Water treatment capacity

INSTALLATION PARAMETERS

SCREEN CONTROLS AND

INFORMATION

Checking / setting client parameters is required if:

• Initial installation is performed.

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.

1. Access Installation Parameters screen as

follows:
A. Select TOOL BOX (1, Fig. 91) icon.

Fig. 90

7. Select Back icon to return to primary TOOL
BOX screen.

Fig. 91

B. Select Installation Parameters (2, Fig. 91)

icon.

C. Enter password (INSB) (1-4, Fig. 92).

Page 63 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 92

D. Select √ (5, Fig. 92) icon.

2. Set / change installation parameters (Fig. 93) by
either:

• Selecting the icon directly.

• Reset remaining time before service
Yes / No).

• Maintenance company.

• Contact (text with keypad entry).

• Tel. no (text with keypad entry).

• Culinary advisor Tel. no (text with

keypad entry).

• Selecting the icon and rotating the encoder
dial to set the desired value.

• Service every (hours).

• Hours / Days (average length of daily

operation).

Fig. 93

3. Select Back icon to return to primary TOOL
BOX screen.

TECHNICAL PARAMETERS

SCREEN CONTROLS AND

INFORMATION

Checking / setting technical parameters is required if:

• Output Control Assembly is replaced.

• Touch Pad / Display Assembly is replaced.

• FastPAD software / firmware is updated.

NOTE: There are five primary and two secondary
screens associated with technical parameter controls
and settings.

1. Access Technical Parameters screens as
follows:

A. Select TOOL BOX (1, Fig. 94) icon.

• Water hardness (ppm).

F45614 Rev. A (0219) Page 64 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 94

B. Select Technical Parameters (2, Fig. 94)

icon.

C. Enter password (SAVB) (1-4, Fig. 95).

Fig. 95

D. Select √ (5, Fig. 95) icon.

2. Select the appropriate icon to set / change
technical parameters (Fig. 96):

• Brand.

• Model.

• Stacked.

• Energy.

• Hz.

• Steam.

• Cleaning.

• Default Display.

• Core Probe.

Page 65 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 96

3. Select Update icon to load parameters.

4. Select Next icon to activate Error History /
Counters screen (Fig. 97). Additional
information is found in ERROR HISTORY /
COUNTER SCREENS AND INFORMATION.

Fig. 97

5. Select Next icon to show State of Inlets screen

(Fig. 98). Additional information is available in
DIAGNOSTIC SCREENS.

F45614 Rev. A (0219) Page 66 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 98

6. Select Next icon to show Activation of
Hydraulic Outputs screen (Fig. 99). Additional

information is available in DIAGNOSTIC
SCREENS.

Fig. 99

7. Select Next icon to show Activation of Power
Outputs screen (Fig. 100). Additional

information is available in DIAGNOSTIC
SCREENS.

Page 67 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

8. Select Back icon to return to primary TOOL

BOX screen.

Fig. 100

WATER TREATMENT COUNTER

F45614 Rev. A (0219) Page 68 of 91

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

NOTE: This only functions if there are two separate supplies to the oven.

1. Open service tab.

2. Select the Client parameters button.

3. Enter "CHEF" PIN code « permanent » (lower or uppercase).

4. Validate “V”: When entered if code is correct, access the menu, if not, re-enter PIN code.

Fig. 101

Water Treatment Capacity

A. Modify or enter value for the capacity of the water treatment system (in liters).

1) Select zone to be changed.

2) Adjust using coder knob.

5. After regeneration of water treatment, reset the counter as required.

A. Press « RESET ».

B. Confirm by pressing « YES ».

Page 69 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DISPLAY SCREEN CONTROLS AND INFORMATION

Fig. 102

F45614 Rev. A (0219) Page 70 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

DIAGNOSTICS

ERROR SCREENS AND

INFORMATION

1. There are three colors of screens associated with
equipment errors.

• A GREEN screen (Fig. 103) is displayed to

provide information that does not impact
operation.

Fig. 103

• A YELLOW screen (Fig. 104) is displayed

when errors occur that impact operation but
do not shut down operation.

Fig. 104

• A RED screen (Fig. 105) is displayed when

errors occur that impact and shut down
operation.

Page 71 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

Refer to:

• the following table for error information.

• WIRING DIAGRAM for component wiring and
connections.

• OUTPUT CONTROL ASSEMBLY for output
control assembly connections.

ERROR

CODE

i28

E30

Fig. 105

MESSAGE ON

SCREEN

Core probe not
connected
(RED error
screen).

Electronics
overheating
(YELLOW error
screen).

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

Cooking stops.

Waiting for a core
probe to be
connected.

Cooking continues.

Core probe not
connected, or open or
shorted.

Drawing in hot air.

Air inlet obstructed. Clean oven air vents.

Axial cooling fan(s) Mt1
and / or Mt2 not
functioning.

Perform TEMPERATURE PROBE
TEST.

Installation problem: check for
external heat source nearby.

Check axial cooling fan input power.

• If present, replace fan(s).

• If not present, check:

• output control assembly
relay board fuse F5.

• output control assembly
relay board output 7 (Mt2
power).

• output control assembly
relay board output 4 (Mt1
power).

If items listed above are OK, replace
output control assembly.

F45614 Rev. A (0219) Page 72 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

i31

i33

E46

MESSAGE ON

SCREEN

Electronics
overheating:
Temperature
reduced to 356
°F (YELLOW
error screen).

Core probe non
function or not
plugged (RED
error screen).

Electronic
communication
fault (Bus
RS485) (RED
error screen).

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

Cooking continues
with cavity
temperature reduced
to 356 °F.

Cooking stops.

NOTE: Cooking
possible with reduced
functionality at up to
347 °F.

Cooking stops.

See error E30. See error E30.

Core probe
disconnected during a
cooking cycle.

Faulty core probe.

Loss of communication
between the output
control assembly and
touch screen / display
assembly.

Perform TEMPERATURE PROBE
TEST.

Check communication LEDs on
output control assembly and touch
screen / display assembly. Refer to
OPERATION / DIAGNOSTIC
INDICATORS

Check / replace Ethernet cable.

Fuse F5 open.

If shorted to ground, check:

• connecting wiring.

E53

Short circuit of
coil or motor or
baffle non
function (RED
error screen).

Cooking stops.

Output control assembly
relay board output 7
shorted to ground.

Output control assembly
relay board output 8
shorted to ground.

Output control assembly
relay board output 4
shorted to ground.

• axial fan Mt2 motor.

• contactor Ks coil.

• blower motor thermal switch
FM1.

• high limit switch Fc.

If items listed above are OK, replace
output control assembly.

If shorted to ground, check:

• connecting wiring.

• contactor Kr coil.

If items listed above are OK, replace
output control assembly.

If shorted to ground, check:

• connecting wiring.

• axial fan Mt1 motor.

If items listed above are OK, replace
output control assembly.

Fuse F3 open.

Page 73 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

MESSAGE ON

SCREEN

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

If shorted to ground, check:

• connecting wiring.

Output control assembly
relay board outputs 15
or 17 shorted to ground.

Fuses F3 and F5 OK, E53 displayed.

Contactor Ks does not
close during the oven
initialization when the
door is closed.

• blower motor M1.

• capacitor CM1.

If items listed above are OK, replace
output control assembly.

Check for defective:

• connecting wiring.

• blower motor thermal switch
FM1.

• safety contactor Ks.

• output control assembly relay
board (output 7).

If items listed above are OK, replace
output control assembly.

Check for defective:

E61

Ambient probe
short circuit
(RED error
screen).

Cooking stops.

Contactor Ks closes
during the oven
initialization when the
door is closed.

E53 appears during operation.

Blower motor thermal
switch FM1 opens.

Cavity temperature
probe poorly
connected / open.

Cavity temperature
probe short circuited.

• fuse F9.

• capacitor CM1.

• blower motor M1.

• output control assembly relay
board output 15.

If items listed above are OK, replace
output control assembly.

Check:

• blower fan / motor turn freely
with no signs of binding.

• blower motor M1 windings
resistance.

• blower motor thermal switch
FM1.

If blower motor and thermal switch
are OK, replace output control
assembly.

Perform TEMPERATURE PROBE
TEST.

NOTE: Check what temperature the
probe is reading in the inputs screen
(TECH parameters) Check the wires
are tightened on connection B1 on
the relay card.

F45614 Rev. A (0219) Page 74 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

E62

E68

MESSAGE ON

SCREEN

Ambient probe
faulty or poorly
connected
(RED error
screen).

Cavity at +554
°F (RED error
screen).

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

Cavity temperature
probe poorly connected
(connection to relay
card).

NOTE: Check what temperature the

Cooking stops.

Cooking stops.

Probe wiring broken.

Heating contactor Kr
failure (always closed).

probe is reading in the inputs screen
(TECH parameters) Disconnect (B1)
from the card. Check the value of the
PT 100 probe on the terminal screws
(see the table for corresponding
values). If incorrect, change the
probe, if the probe is functioning,
replace the relay card.

Toggle heat on and off. Refer to
DIAGNOSTIC SCREENS Actuation
of Power Outlets (Kr1 function).

Turn off oven and check:

• heating contactor Kr contacts
(should be open).

• heating contactor Kr coil (should
be open).

E72

E73

Electronics at
over 167 °F
(RED error
screen).

Detergent pump
faulty or on
permanently
(RED error
screen).

Check contactor Kr coil.

If items listed above are OK, replace
output control assembly.

Cooking stops. See error E30. See error E30.

Pump is on when a cleaning cycle is not running.

Relay card is stuck on or
detection electronics not
working.

Cooking stops.

Relay card is stuck on or
detection electronics not
working.

Check if the pump is running all the
time after the oven is turned on. If so
replace the FastPad relay card.

Open circuit.

Check if the pump is running all the
time after the oven is turned on. If so,
replace the FastPad relay card.

Pump working.

Page 75 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

MESSAGE ON

SCREEN

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

Check the connections for Phase
and Neutral to the pump.

Pump badly connected.

Fig. 106

Output control assembly relay board
output 24. If shorted to ground,
check:

• connecting wiring.

• valve Yv solenoid.

Output control assembly relay board
output 25. If shorted to ground,
check:

i81

Water flow
problem.

Cooking will be
degraded.

Fuse F1 open.

• connecting wiring.

• fuse F8.

• vent motor Mo.

Output control assembly relay board
output 27. If shorted to ground,
check:

• connecting wiring.

• valve Yn solenoid.

Output control assembly relay board
output 29. If shorted to ground,
check:

• connecting wiring.

• detergent pump thermal
overload switch FPdn.

• detergent pump Pdn.

Output control assembly relay board
output 30. If shorted to ground check:

• connecting wiring.

• valve Yc solenoid.

F45614 Rev. A (0219) Page 76 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

E82

MESSAGE ON

SCREEN

Solenoid leaking
(RED error
screen).

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

If output control assembly relay
board outs are OK, replace output
control assembly.

Output control assembly relay board
output 9. If shorted to ground check:

• connecting wiring.

• valve Yf solenoid.

Output control assembly relay board

Fuse F4 open.

Water supply problem.

Solenoid has failed.

Flow meter inoperative.

Valve(s) leaking.

Cooking stops.

Flow meter inoperative.

output 10. If shorted to ground check:

• connecting wiring.

• valve Yi solenoid.

If output control assembly relay
board outs are OK, replace output
control assembly.

Check the water supply to the unit:
minimum flow 5 liters/minute and
minimum pressure 1.5 bars. Check
that the filter isn’t clogged and the
state of the pressure limiter. Check
the state of the flow limiters.

Check solenoids Yi, Yf, and Yn S10,
S30 and S27 from the output
activation screen in (TECH
parameters). Measure the volume of
water recovered in 1 minute.

Check flow meter operation. Refer to
DIAGNOSTIC SCREENS
Activation of Hydraulics screen.
Activate Yi and check BDS. flow rate.

Check Yi (injection valve), Yf (cooling
valve), and Yn (cleaning valve), for
leakage.

Check valve operation. Refer to
DIAGNOSTIC SCREENS
Activation of Hydraulics screen.
Activate Yf, Yi, Yf, and Pdn (Yn) and
check valve activation.

Check flow meter operation. Refer to
DIAGNOSTIC SCREENS
Activation of Hydraulics screen.
Activate Yi and check BDS. flow rate.

Page 77 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

ERROR

CODE

Error history information may be accessed via
ERROR HISTORY / COUNTER SCREENS AND
INFORMATION.

MESSAGE ON

SCREEN

CONSEQUENCES PROBABLE CAUSE POSSIBLE SOLUTION

ERROR HISTORY / COUNTER

SCREENS AND INFORMATION

Output control assembly
relay board.

Check:

• output control assembly fuse
F1.

• output control assembly relay
board output 9 (Yc).

• output control assembly relay
board output 10 (Yi).

• output control assembly relay
board output 27 (Yn).

• output control assembly relay
board output 30 (Yf).

Error and counter screens are access via the
Technical Parameters screen. Refer to TECHNICAL
PARAMETERS SCREEN CONTROLS AND
INFORMATION for information on how to activate the
screens.

NOTE: Error and / or counter information can be
viewed or downloaded.

ERROR HISTORY / COUNTER SCREENS

1. Select Error message history View icon (Fig.

107) to view error history. Select Download icon
to download an Excel-compatible spreadsheet to
a USB drive.

Fig. 107

2. Select Counters View icon (Fig. 107) to view

operational counter information. Select
Download icon to download an Excel­compatible spreadsheet to a USB drive.

ERROR HISTORY SCREEN

When the error messages history VIEW icon is
selected, a list of errors (Fig. 108) is displayed.

F45614 Rev. A (0219) Page 78 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

Fig. 108

Refer to:

• the following table for error information.

• WIRING DIAGRAM for component wiring and
connections.

• OUTPUT CONTROL ASSEMBLY for output
control assembly connections.

COUNTER SCREEN

When the Counter VIEW icon is selected, a list of
operational counters (Fig. 109) is displayed.

Fig. 109

Refer to the following table for counter information.

Counter

CPT00 Total operating time.

CPT01

CPT02

CPT03

CPT04

CPT05 *

CPT06

CPT07 *

CPT08 Valve Yi operating time.

CPT09 Valve Yf operating time.

Information (All Time
Provided in Hours)

Convection mode
operating time.

Steam mode operating
time.

Combi mode operating
time.

Number of door
openings.

Number of gas security
inlet errors (Error 57).

Hot electronics (> 158 °F
[70 °C]) operating time.

Output control assembly
relay board output 21
operating time.

Page 79 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

* Function not used in Minijet configuration.

DIAGNOSTIC SCREENS

NOTE: Refer to TECHNICAL PARAMETERS

SCREEN CONTROLS AND INFORMATION for
information on how to access the diagnostic screens.
Refer to OUTPUT CONTROL ASSEMBLY for
information about output control assembly
connections.

1. The State of Inlets screen (Fig. 110) provides
the following indications:

• B1 (1, Fig. 110) - Cavity temperature

(monitored by output control assembly input
B1).

• E2 / E2b / E2c (2, Fig. 110) - Core probe(s)

temperature (monitored by output control
assembly input E2, E2b, E2c).

• SP (3, Fig. 110) - Door position (monitored

by output control assembly input SP).

• Yn (2, Fig. 111) - Cleaning valve (controlled

by output control assembly relay board
output 27).

• Yf (3, Fig. 111) - Cooling valve (controlled

by output control assembly relay board
output 30).

• Yi (4, Fig. 111) - Injection valve (controlled

by output control assembly relay board
output 10).

• Yv (5, Fig. 111) - Detergent valve (controlled

by output control assembly relay board
output 24).

• Yc (6, Fig. 111) - Condensate cooling valve

(controlled by output control assembly relay
board output 9).

• Pdn (7, Fig. 111) - Detergent pump

(controlled by output control assembly relay
board output 29).

Fig. 110

2. The Activation Hydraulic Outlets screen (Fig.

111) provides the following indications / controls:

• BDS (1, Fig. 111) - Flow meter (monitored

by output control assembly input BDS).

F45614 Rev. A (0219) Page 80 of 91

NOTE: Door should be closed during all tests.

Fig. 111

A. Touch Yn to open cleaning valve for 0.5

second. Monitor flow via Bds reading.

B. Touch Yf to open cooling valve for 60

seconds. Monitor flow via Bds reading.

MINI JET COMBI OVEN - DIAGNOSTICS

C. Touch Yi to open injection valve for 60

seconds. Monitor flow via Bds reading.

D. Touch Yv to open detergent valve for 0.5

second.

E. Touch Yc to open condensate cooling valve

for 60 seconds.

F. Touch Pdn to turn on detergent pump for 0.5

second.

3. The Activation of Power Outlets screen (Fig.

112) provides the following indications / controls:

• Mo (1, Fig. 112) - Vent motor (controlled by

output control assembly relay board output

25).

• Ee (2, Fig. 112) Cavity lamp (controlled by

output control assembly relay board output

5).

• Kr1 (3, Fig. 112) - Heater contactor

(controlled by output control assembly relay
board output 8).

• Mv15 (4, Fig. 112) - Blower motor (Mt1)

clockwise rotation (controlled by output
control assembly relay board output 15).

• Mv17 (5, Fig. 112) - Blower motor (Mt1)

counterclockwise rotation (controlled by
output control assembly relay board output

17).

• Ks (6, Fig. 112) - Safety contactor

(controlled by output control assembly relay
board output 7).

• Mt (7, Fig. 112) - Axial fan (Mt2) (controlled

by output control assembly relay board
output 4).

Fig. 112

NOTE: Door should be closed during all tests.

A. Touch Mo to turn on vent motor. Release

Mo to allow vent flap to return to home

position.

B. Touch Ee to toggle cavity lamp ON / OFF.
C. Touch Kr1 to turn on heater contactor for 0.5

second.

D. Touch Mv15 to turn on blower motor

(clockwise rotation) for 0.5 second.

E. Touch Mv17 to turn on blower motor

(counter-clockwise rotation) for 0.5 second.

F. Touch Ks to turn on safety contactor for 0.5

second.

G. Touch Mt to toggle axial fan Mt2 ON / OFF.

OPERATION / DIAGNOSTIC

INDICATORS

The oven contains several assemblies that provide
either operational or diagnostic indicators. The
assemblies are:

• Output Control Assembly.

Page 81 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

• Touch Panel / Display Assembly.

Output Control Assembly

The output control assembly contains two assemblies,
the output control board and the relay board. Both
boards have LEDs that provide operational
information.

The output control board has a power indicator LED
(1, Fig. 113) and a pair of communication indicator
LEDs (2, Fig. 113). The power indicator LED is ON
when supply voltage is applied to the output control
assembly. The communication LEDs flash when the
output control assembly is communicating with the
touch panel / display assembly.

Fig. 113

The relay board has four LEDs that provide a quick
means of determining if the relay board fuses are
good.

• Fuse F4 LED (3, Fig. 113) is ON if F4 is good.

• Fuse F5 LED (4, Fig. 113 ) is ON if fuse F5 is
good.

• Fuse F1 LED (5, Fig. 113) is ON if fuse F1 is
good.

• Fuse F2 LED (6, Fig. 113) is ON if fuse F2 is
good.

An additional LED is provided (7, Fig. 113), however
it does not turn ON in this configuration.

Touch Panel / Display Assembly

The touch panel / display assembly uses LEDs to
provide both diagnostic and communication
information. The primary board has four diagnostic
indicator LEDs (1, Fig. 114). The communications
board has four diagnostic LEDs (2) and two
communication indicator LEDs and a power indicator
LED (3).

Fig. 114

Power / Communications LEDs

• The YELLOW (send) and GREEN (receive)
LEDs flash when output control and touch panel /
display assemblies are communicating.

• The RED (power) LED is on steady whenever
power is applied to the assembly.

Refer to Fig. 115 for communication / power LED
indications.

F45614 Rev. A (0219) Page 82 of 91

MINI JET COMBI OVEN - DIAGNOSTICS

Fig. 115

1. Normal operation. Both output control and touch
panel / display assemblies are operating
normally.

2. Supply fault. No power to output control
assembly. Check for voltage at output control
assembly terminals 1 and 3.

• Power present - replace output control

assembly.

• No power - check fuses F6 and F7, primary

transformer Ta, and interconnecting wiring.

3. Communications fault. No communications
between output control and touch panel display
assemblies.

• Replace Ethernet cable.

• Replace touch panel display assembly.

4. Communications fault. No communications
between output control and touch panel display
assemblies.

• Replace Ethernet cable.

• Replace output control assembly.

5. Touch panel / display assembly fault. Replace
assembly.

6. Communications fault. No communications
between output control and touch panel display
assemblies. Replace Ethernet cable.

1. All four LEDS turn ON at power application then
turn OFF sequentially - normal operation. Touch
panel / display assembly operating normally.

2. One (or more) LEDs remain on-communications
board failure. Replace touch panel / display
assembly.

3. All four LEDS off during operation - normal
operation. Touch panel / display assembly
operating normally.

4. LED 1 flashes during operation ­communications fault.

• Check Ethernet cable connections.

• Replace Ethernet cable.

• Replace output control assembly.

5. LED 4 flashes during operation ­communications fault.

• Reseat SD card (4, Fig. 114).

• Replace touch panel / display assembly.

Refer to Fig. 117 for touch panel display assembly

PRIMARY board LED indications.

Touch Panel / Display Diagnostic LEDs

There are two sets of diagnostic LEDs located on the
touch panel / display assembly. One set (1,
is on the primary board and the other set (3) is on the
communications board.

Refer to Fig. 116 for touch panel display assembly
COMMUNICATIONS board LED indications.

Fig. 114)

Page 83 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - DIAGNOSTICS

Fig. 117

1. All four LEDS ON at power application.
Communications board µSD card fault.

• Reseat SD card (4, Fig. 114).

• Replace touch panel / display assembly.

2. LED 1 and 2 flash, 3 and 4 ON - communications
board failure. Replace touch panel / display
assembly.

3. All four LEDS off , no display - primary board
failure. Replace touch panel / display assembly.

4. All four LEDS OFF - normal operation. Touch
panel / display assembly operating normally.

TEMPERATURE PROBE TEST

There are two temperature probes: core and cavity.
The cavity probe is permanently mounted in the oven
cavity. The core probe is connected via a connector
on the front panel of the oven.

Cavity Probe Test

Fig. 118

3. Using a VOM meter, check resistance between
temperature probe leads.

4. Compare measured resistance to
PROBE CHECK.

5. Replace probe if the resistance is grater than 5%
different than value provided in chart.

Core Probe Test

The core probe must be checked using physical
conditions. Use of a temperature tester is required.
The core probe temperature is displayed on the
technical parameters screen as readings E2, E2b, and
E2c.

1. Place core probe and temperature tester probe
in a pan of ice water. Both probes should
measure the same temperature within 5 °F.

2. Place core probe and temperature tester probe
in a pan of boiling water. Both probes should
measure the same temperature within 5 °F.

PT100

1. Remove TOP COVER.

2. Remove appropriate connector from output
control assembly (Fig. 118).

F45614 Rev. A (0219) Page 84 of 91

3. If temperature difference is greater than 5 °F,

4. If the core probe temperature is not present or

The PT100 probe resistance determines temperature.
It has a resistance of 100 Ω at 32 °F (-0 °C) and 138.5
Ω at 212 °F (100 °C) . The sensor is linear and its
connections are not polarised. See table below for
temperature / resistance ratio.

replace core probe.

does not change, check wiring between front
panel connector and output control board
assembly.

PT100 PROBE CHECK

MINI JET COMBI OVEN - DIAGNOSTICS

Fig. 119

Page 85 of 91 F45614 Rev. A (0219)

MINI JET COMBI OVEN - SOFTWARE

SOFTWARE

SOFTWARE UPDATE PROCEDURE

1. Copy new software file from Hobart resource
center. Instructions for downloading files are
located on the Hobart Service Resource Center,
under Cooking > Software Updates > General.

NOTE: Once the file is copied to the USB drive,
proceed to the next step.

2. If you are replacing the main board and updating
the software do the following.

Disconnect the electrical power to
the machine and follow lockout /
tagout procedures.

A. Check the position of output control

assembly microswitches (1, Fig. 120). Make
sure 1 is OFF and 2, 3, and 4 are ON.

Fig. 121

7. Select Tool Box on screen display.

Fig. 120

B. Press encoder dial to turn oven ON.

3. Safely eject USB flash drive from PC.

4. Verify oven is plugged in.

5. Open door.

NOTE: Opening the door will keep the oven from
heating during this procedure.

6. Push black knob (1, Fig. 121) to turn on.

F45614 Rev. A (0219) Page 86 of 91

MINI JET COMBI OVEN - SOFTWARE

NOTE: Wait approximately 12 minutes for software to
update.

Removal of USB flash drive or input power while
loading software may result in corrupted installation.

10. Remove USB flash drive after updating is
complete.

Fig. 124

Fig. 122

8. Insert flash drive (1, Fig. 121) into side of oven.

11. Select Tool Box on screen and verify software
has updated.

NOTE: The version of software can be seen on
TOOLBOX screen next to serial number of the unit.
Each card is identified together with its software
number:

• IHM Nr: Touch panel / display assembly SD

card.

• UC Nr: Touch panel / display assembly

communications board.

• Param Nr: Touch panel / display assembly

primary board.

• Fla Nr: Output control assembly board.

• Rel Nr: Output control assembly relay

board.

Fig. 123

9. Select YES on update message (Fig. 124)
displayed on screen.

Fig. 125

Page 87 of 91 F45614 Rev. A (0219)

IHM Nr 218

MINI JET COMBI OVEN - SOFTWARE

Current Software

UC Nr 218

Fla Nr 212

12. Select Client Parameters on screen.

REl Nr 109

Fig. 127

14. Select Next. Verify EN, ABC and JET are
selected. Verify COMMON is not selected. Push
Back button twice.

Fig. 126

13. Enter: 0000 and select green check mark.

F45614 Rev. A (0219) Page 88 of 91

MINI JET COMBI OVEN - SOFTWARE

Fig. 128

15. Select Technical Parameters.

Fig. 129

Current Software

IHM Nr 218

FLA Nr 212

16. Enter: SAVB and select green check mark.

Page 89 of 91 F45614 Rev. A (0219)

UC Nr 218

REL Nr 109

MINI JET COMBI OVEN - SOFTWARE

Fig. 130

17. Verify Settings is lit on Tool Box screen.

Fig. 131

18. Verify ABC JET is showing on Manual screen.

F45614 Rev. A (0219) Page 90 of 91

MINI JET COMBI OVEN - SOFTWARE

Fig. 132

NOTE: Software has been loaded successfully.

Page 91 of 91 F45614 Rev. A (0219)