Fri-Jado MDD Series User manual

Rev 0 Service Manual MDD 2021 Page 1
- NOTICE -
This service manual is prepared to be used by trained Service Technicians and should not be used by
those not properly qualied. If you have attended a training for this product, you may be qualied to
perform all repair procedures, replacements and adjustments described in this service manual.
The information presented in this document is only valid for Multi Deck Display congurations and is
not intended to be all encompassing. The individual specications may di󰀨er.
Procedures for which you do not have the necessary tools, instruments or skills should not be performed
by you.
Technical data and specications mentioned in this manual are subject to amendment without prior notice.
Reproduction of this service manual,
without the express written consent of Fri-Jado,
is prohibited.
9124707
SERVICE MANUAL Multi Deck Display; MDD-Series

Page 2
Rev 0 Service Manual MDD 2021
Version Issue date Remarks
dd/mm/yy
0 01-04-2021 Revision 0 <DRAFT>
1 First Release
KEEP THIS USER MANUAL FOR FUTURE USE
© 2021 Fri-Jado B.V., Oud Gastel, The Netherlands.
We refer to our General Terms and Conditions for Sales and Delivery that are available upon request.
The manufacturer does not accept any liability for damage or injury caused by failing to adhere to these
regulations or by not observing the usual caution or care in actions, operation, maintenance or repair
activities, even if not explicitly described in this manual.
As a result of constant commitment to improvement, it may happen that your unit deviates in detail from
what is described in this manual. For this reason, the given instructions are only a guideline for the
installation, use, maintenance and repair of the unit referred to in this manual.
This manual has been composed with the utmost care. The manufacturer shall, however, not be held
responsible for any mistakes in this manual nor for any consequences thereof.
All rights are reserved and nothing in this manual may be reproduced and/or made public in any way.
Modications:
In case of unauthorized modications in or on the unit, every liability on the part of the manufacturer
becomes null and void.

Rev 0 Service Manual MDD 2021 Page 3
Index
1.0 Introduction 4
2.0 Detailed description 7
3.0 Unpacking 9
4.0 Installation 10
5.0 Operation 11
5.1 Operation <access controller> 12
5.2 Operation <access controller> 13
5.3 Operation <parameter settings> 14
6.0 Maintenance 15
7.0 Trouble shooting 16
8.0 Replacement and adjustment 20
9.0 Specications 29
9.1 Specications MDD 60-4 SB 30
9.2 Specications MDD 60-5 SB 31
9.3 Specications MDD 90-4 SB 32
9.4 Specications MDD 90-5 SB 33
9.5 Specications MDD120-4 SB 34
9.6 Specications MDD 120-5 SB 35
10.0 Exploded view 36
11.0 Recommended spare parts list 42
12.0 Electrical schematic wiring Multi Temp 4 layer 43
12.1 Electrical schematic wiring Multi Temp 5 layer 44
12.2 Electrical schematic circuit Multi Temp 45
12.3 Electrical schematic wiring Single Temp 4 layer 46
12.4 Electrical schematic wiring Single Temp 5 layer 47
12.5 Electrical schematic circuit Single Temp 48

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Rev 0 Service Manual MDD 2021
1.0 Introduction
1.1 General
This manual is intended for trained technicians, performing repairs on the Multi Deck Display, MDD.
The features and controls are being described, along with directions for the safest and most
e󰀩cient way to service these counters.
All pictograms, symbols and drawings in this manual apply to all available MDD models.
1.2 Identicationoftheunit
The identication plate can be found on the outside of the machine, and contains the following data:
• Name of the supplier or the manufacturer • Model
• Serial number • Year of construction code
• Voltage • Frequency
• Power consumption
1.3 Pictograms and symbols
In this manual, the following pictograms and symbols are used:
WARNING symbols:
WARNING WARNING
Possible physical injury or serious Risk of Fire.
damage to the unit,
WARNING WARNING
Hazardous electrical voltage. Danger of getting injured by hot
surfaces.
SAFETY symbols:
SAFETY SAFETY
Wear safety gloves for installation Wear eye protection.
and dismantling.
SAFETY Disposal
ALWAYS Remove power plug from According local regulations
main outlet before working on the unit.
SAFETY Cleaning
Clean Hands and/or Tools Not Allowed to use water hose.
Suggestions and recommendations.
Notication Cleaning
Take care o󰀨: On regularly interval
Recyclingsymbol.    Reading
Instructions referred to
Minimumroomoorarea.   Partofmanualunderconstruction
        Picturesorphotostobeadded

Rev 0 Service Manual MDD 2021 Page 5
1.4.1 Safety rules and regulations
The technician, working on the unit will be fully responsible for abiding the locally prevailing
safety rules and regulations.
Technical activities must be performed by qualied and authorized persons only.
Before working on any electrical part, or dismantling the unit by means of using a
screwdriver or any other tool, ALWAYS REMOVE THE POWER PLUG from the main outlet.
Anyone performing technical repairs, replacements or adjustments on or with this unit
must be familiar with the contents of this service manual and carefully follow all guidelines
and instructions.
Never change the order of the steps to be performed.
The pictograms, labels, instructions and warning signs attached to the unit, are part of the
safety measures.
The pictograms, labels, instructions and warning signs may never
be covered or removed,
and have to be clearly visible during the entire lifetime of the unit.
Immediately repair or replace damaged or illegible pictograms, warnings and instructions.
Notes:
• To avoid short-circuiting, never clean the unit using a water hose.
For detailed cleaning instructions, please refer to MDD user manual.
• The shelves, all glass parts and the back of the unit can get hot.
• All units must be cleaned regularly to ensure proper functioning.
At least on a weekly basis.
• Do not store explosive substances;
such as aerosol cans with ammable propellant, in this appliance.
1.0 Introduction
1.4.2 Moving
• Before moving the unit, rst switch o󰀨 the mains switch and disconnect power
by pulling the plug from the wall socket.
• Remove all product from the unit.
• Always keep the unit in upright position.
1.4.3 Outdoor use restrictions
WARNING
To avoid short-circuiting, the units may not be used outdoors nor in a rainy or
very moist environment.

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1.5 Hygiene
WARNING
Immediately remove products in damaged packaging from the equipment and destroy the
products, abiding the locally prevailing safety rules and regulations.
Clean all components that have come in contact with products from damaged packaging.
The quality of a fresh product always depends on hygiene.
It is essential that products are hygienically packaged immediately after preparation, and
loaded with a core temperature of 85 ºC.
Prevent fresh raw vegetables or already prepared, cooled products from coming into contact
with raw meat products to avoid transmitting salmonella.
First thoroughly clean hands and/or tools that have touched raw meat.
For detailed cleaning instructions, please refer to MDD user manual.
1.6 Service and technical support
The electrical schematics of the unit are included at the end of this manual.
In case of malfunctions which are not xable by you, please contact Fri-Jado.
[email protected]
Make sure you have the following data available:
• Model.
• Serial number.
This data can be found on the identication plate.
1.7 Storage
If the unit will not be used temporarily, and will be stored, follow these instructions:
• Clean the unit thoroughly.
• Wrap the unit from getting dusty.
• Store the unit in a dry, non-condensing environment.
• Ensure good ventilation.
1.8 Disposal
Dispose of the machine, any components or lubricants removed from it, safely in
accordance with all local and national safety and environment rules and requirements.
1.0 Introduction

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2.0 Detailed description
2.0 Description
The Multi Deck Display is a multilevel self-service heated display cabinet intended for hot
presentation of packaged food products.
Each shelf has a self-contained heated air circulation system.
Air is drawn in at the back of the shelf and passed over a heating element located underneath the
glass surface.
An air outlet at the front of the shelf creates a stable air curtain at the open side of the cabinet to
minimize the inltration of cold ambient air.
All air in- and outlet openings must be kept clear.
A digital controller is installed to regulate the temperature inside the cabinet.
This can be one single controller for the entire cabinet or one controller per shelf,
(Also called multi-temp conguration) which allows individual shelves to be controlled
independently of one another.
To make sure the cabinet is installed, operated and serviced in a safe manner, the
instructions provided by Fri-Jado and stated in this service manual should be
adhered to at all times.
In due time, cabinets can be ordered with a pass-through option (utilizing rear folding doors)
or with a solid back. At this time (June 2021), only the solid back option can be ordered.
The information presented in this document is valid for standard MDD-
congurations, specications for custom congurations may di󰀨er.
No rights can be derived from this document. Specications and technical data
are subject to amendment without prior notice.

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Rev 0 Service Manual MDD 2021
2.1 Connection to main voltage.
Warning Electrical shock Hazard
• Groundinginstructions:
Only connect the appliance
> on: an alternating current,
> on: a grounded wall socket,
> with a mains voltage in accordance with the information
indicated on the type plate of the appliance.
• It is the consumer’s responsibility to make sure the electrical installation
conforms with current national and local codes and wiring regulations.
• It is not allowed to use a multi plug or extension cord.
Such can result in re, electrical shock, or personal injury.
Failure to follow these instructions can result in serious injury or even death.
2.0 Detailed description

Rev 0 Service Manual MDD 2021 Page 9
Remove the 2 side boards.
Remove the top crate pane and foam.
Remove tempex and foil.
12
34
5
UNPACKING INSTRUCTION MDD 9124672 rev. 05/2020
6
NL - Lees de handleiding voordat u verder gaat.
EN - Read the manual before proceeding.
DE - Lesen Sie die Gebrachsanleitung, bevor Sie
Fortfahren.
FR - Lire le manuel avan de continuer
ES - Leer el manual antes de continuar
PT - Leia o manual de instruções antes de continuar.
IT - Leggere il manuale prima di procedere.
NO - Les nøye gjennom instruksjonene før du tar
apparatet i bruk.
SV - Läs igenom bruksanvisningen innan du fortsättler.
FI - Lue käyttöohje ennen kuin otat laitteen käyttöön.
Keep castors locked!
Lift the unit from the support beams using a pallet truck or forklift.
Remove the supporting beams.
All packing materials used for this unit are suited for recycling.
Before and during unpacking, check the state of the unit.
In case of damage, store the packing material,
and contact the transporter within fteen working
days after receiving the goods.
3.0 Unpacking

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4.0 Installation
4.0 Placement of the unit
WARNING
Position the unit on a at and horizontal surface.
A temporally inclined plane of maximum 5° is allowed.
• Be sure that the personnel have su󰀩cient room to work with the unit.
• Keep a distance of at least 150 mm (6 inch) between the wall and the back of the unit.
• While positioning, keep the unit out of children’s reach.
• Do not position a unit near a doorway, a ventilation device or a refrigerator in order to avoid
any negative e󰀨ects on the unit’s operation by a cold airow.
The unit is designed for a maximum draft of 0.2 m/s (0.65 ft./sec).
• Do not place into direct sunlight.
• The unit should not be used below 20 ºC (68 ºF) ambient temperatures.
• The unit has a mains plug, and must be connected to a wall socket with the proper mains
voltage.
The wall outlet must be installed by a certied electrician.

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5.0.0 Settings
Thedisplayvalueisnottheproducttemperature!
When switched on, the display performs a lamp test; the display and LED’s will ash
for several seconds to check all functions are working correctly.
5.0.1 Control Panel
For additional key functions refer 5.2.2
5.0.2 Factory settings
The unit is set at 65 ºC (149 ºF) intake air temperature.
If required this temperature can be adjusted to some degree.
At a ambient temperature of 20 ºC (68 ºF) and an initial core temperature of 85 ºC (185 ºF)
the factory settings of the unit’s temperature ensure a constant core temperature of at
least 63 ºC (145.5 ºF) for 4 hours.
The unit is designed for a maximum draft of 0.2 m/s (0.65 ft./sec).
5.0 Operation
A1 Indication ON
A2 Display temperature
A3 UP-button (power on/o󰀨)*
A4 SET-button
A5 DOWN-button
* Switch on/o󰀨: hold for approx. 3 sec.

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5.1 Operation <access controller>
5.1.0 Menu Structure

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5.2.0 Switching-on the unit
• Switch the unit on, by means of the main switch (located top front, and/or top back),
• Switch on controller for specied shelf (Multi-temp only),
• Preheat the unit/shelf for at least 30 minutes,
• Switch on the lighting with appropriate switch (next to controller of specied shelf).
5.2.1 Loading the unit
• Only place products that have a core temperature of at least 85 ºC (185 ºF) or above.
• Only with packaged hot products in closed bags or closed containers (without punctured
holes) that are suitable for this purpose, withstanding these temperatures.
• To ensure a good contact with the heated trays, only place a single layer of products.
• The maximum carrying-capacity per shelf is 30 kg/m (66 lbs/m), by equal load.
5.2 Operation <access controller>
5.2.2 Additional key functions

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5.3 Operation <parameter settings>
Doc. nr.
9124410
Rev. Registration form.
Danfoss ERC 211 – 65 °C
Pagina 1 van 1
MDD
Note: Use tool STICK 18 for inserting parameters and only change yellow arced parameters manually!
r00 Temperature set point 65 °C
r01 Differential 1 K
r02 Min set point limitation 40 °C
r03 Max set point limitation 70 °C
r04 Display offset 0 °C
r05 Display unit (°C/°F) °C
r09 Calibration of Sair 0 °C
r12 Main switch 1
r13 Night set back 0
r40 Thermostat reference displacement 0
r96 Pull-down duration 0
r97 Pull-down limit temperature 0
A03 Delay for temperature alarm
(normal conditions)
30 min
A12 Delay for temperature alarm
(pull down/start-up/defrost)
60 min
A13 High temperature alarm limit 100 °C
A14 Low temperature alarm limit - 3 0 °C
A27 DI1 delay 30 min
A37 Condenser high alarm limit 80 °C
A54 Condenser high block limit 85 °C
A72 Voltage protection enable no
A73 Minimum cut-in voltage 0 V
A74 Minimum cut-out voltage 0 V
A75 Maximum voltage 270 V
d01 Defrost method
(no=no defrost, nAt=natural)
no
d02 Defrost stop temperature 6 °C
d03 Defrost Interval 8 hr.
d04 Max. defrost time 30 min
d05 Defrost delay at power up 0 min
d06 Drip delay 0 min
d10 Defrost stop sensor
(non=time, Air=Sair)
non
d18 Compressor accumulated 0 hr.
d30 Defrost delay after pull-down 0 min
c01 Compressor minimum ON time 0 min
c02 Compressor minimum OFF-time 0 min
c04 Compressor OFF delay 0 sec
c70 Zero crossing selection yES
o01 Delay of outputs 0 sec
o02 DI1 configuration oFF
o03 Serial address 0
o05 Password no
o06 Sensor type selection
(n5=NTC5 K, n10=NTC10 K, Ptc=PTC,
Pt1=Pt1000)
Ptc
o07 Cooling/heating
(rE=refrigeration / Ht=heat)
Ht
o15 Display resolution (°C) 0.1
o23 Relay counter 0
o61 Predefined applications AP0
o67 Save settings as factory no
o91 Display at defrost d
P73 DI1 input polarity no
P76 Keyboard lock enable no
u01 Air temperature (Sair) - °C
u02 Read the present regulation refer-
ence -
u10 DI1 input -
u13 Status of night operation -
u58 Compressor relay status - -
u80 Firmware version readout -

Rev 0 Service Manual MDD 2021 Page 15
6.0 CLEANING AND MAINTENANCE
WARNING
Never use a water hose for cleaning.
Water can seep into the unit through the ventilation holes of the unit.
Because of hygiene aspects and optimum condition of the unit it is of utmost importance to
keep a daily cleaning pattern from rst use onwards.
Maintenance schedule for users
For detailed cleaning instructions refer to User manual.
6.1 Cleaning Shelf(s)
• Remove products from shelf.
• Switch o󰀨 unit, and let cool down.
• Clean shelf glass with moist cloth, using a mild detergent only.
Item Action Frequency
Inside Clean Daily
Glass Panes Clean Daily
Outside Clean
Use e.g. mild detergent or cleaning spray to remove
stains, and restoring the gloss.
Weekly
6.0 Maintenance

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7.0 Problems which can be checked by user
Each user can check the following points as mentioned in the user manual:
• Is the power supply ok?
• Check the fuses and the earth leakage circuit breaker in the meter cupboard.
• Are all the switches in the correct “on” position?
Item Malfunction Possible action
Unit Unit does not work • Check the power supply.
• Check the earth leakage circuit breaker.
• Are all switches in the correct position.
Unit Display shows error code • Contact your supplier or service agency.
Lamp Does not light up • Switch ON.
Mains cord Damaged • Replace.
Window Damaged • Replace.
7.1 Replace the mains cord
WARNING
Hazardous electrical voltage.
If the mains cord is damaged, it must be replaced by a fully certied and qualied person
in order to avoid hazards.
7.2 Error codes and solutions
See 7.5
7.3 Heating element testing
Resistance
1. Remove wiring (two) from the element.
2. Connect a probe of the multimeter to each of the wires.
3. Test the probe with a Ohm tester, values see below.
Current
1. Place ampere pliers around red wire of Element.
2. In normal working condition, test current see below. (230V version)
MDD60 MDD90 MDD120
Shelf Power Current Resistance Power Current Resistance Power Current Resistance
Watt Ampere Ohm Watt Ampere Ohm Watt Ampere Ohm
Top 465 2,02 113,7 700 3,04 75,6 935 4,07 56,6
Shelf 1 570 2,48 92,8 850 3,70 62,2 1130 4,91 46,8
Shelf 2 570 2.48 92,8 850 3,70 62,6 1130 4,91 46,8
Shelf 3 570 2.48 92,8 850 3,70 62,6 1130 4.91 46,8
Bottom 750 3,26 70,5 1125 4,89 47,0 1500 6,52 35,3
7.0 Trouble shooting

Rev 0 Service Manual MDD 2021 Page 17
7.4 PTC1000 sensor testing (Each shelf has own PTC1000 sensor)
1. Remove sensor wiring from the connector block.
2. Connect a temperature tester to the probe of the sensor for comparison.
3. Test the probe with a Ohm tester.
Temperature Resistance Ω
⁰F ⁰C +/-5Ohms
-4 -20 951
14 -10 877
32 0 807
50 10 740
68 20 677
77 25 990
7.0 Trouble shooting
Symptom Possible causes
No power 1. Main circuit breaker open
2. Earth leakage circuit breaker tripped
3. Fuse Blown
4. Loose wire connection
5. Wiring incorrectly
6. Short circuit heating element
7. Short circuit fan
8. Short circuit wiring
Illumination does not work 1. Led malfunction
2. Tumble switch malfunction
3. Led driver malfunction
4. Loose / short circuit / wiring connection
No heating 1. Heating element malfunction
2. Relay malfunction
3. Loose wiring connection
4. Thermostat malfunction
5. Air ow not functioning
6. PTC sensor malfunction
Unit does not reach desired temperature 1. Heating element malfunction
2. Strong air current along unit / Draft
3. Burned contact on contactor
4. Sensor malfunction
5. Doors not closed (if available)
No indication on controller 1. Electronic controller malfunction
2. Blown fuse
3. Loose wiring connection
No air ow inside unit 1. Fans do not work
2. Blown fuse
3. Loose wiring connection
4. 24 Vdc power supply malfunction

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Description of part Symptoms Possible causes Solution / Check / Action
Contactor Contactor does not
work
Wiring
Coil malfunction
Contact burned
Check wiring
Check resistance of coil
+/- 525Ω
Check the contacts
Replace contactor
Heating element Unit is not reaching the
set temperature
Wiring
Element malfunction
No Air ow.
Fan’s not turning
Check wiring
Check power on elements per
shelf
Check current with AC current
tester (refer 7.3)
Check Resistance (refer 7.3)
Replace element
Check wiring
Check power on fans per shelf
Replace fan box / Power Supply
Tumble switch Unit, Light or heating
does not switch on
Wiring
Contact burned
Check wiring
Check the voltage on “in“ and
“output“
LED Light does not turn on Wiring
LED broken
LED driver defect
Check Wiring
Replace LED
Replace LED driver
Electronic thermostat Display does not light
up
The unit is not reaching
the set temperature
Wiring
Loose sensor
Thermostat
Malfunction
Thermostat setting
Check wiring
Check sensor
Replace thermostat
Check parameters
PTC 1000 sensor The unit is not reaching
the set temperature or
does not heat up at all
The unit becomes too
hot
Loose sensor
Broken Sensor
Check Resistance (refer 7.4)
Check sensor wiring
Replace sensor
7.0 Trouble shooting

Rev 0 Service Manual MDD 2021 Page 19
7.0 Trouble shooting
7.5 Alarms
Solutions
ALARM CODE POSSIBLE SOLUTION
E29 Not applicable for MDD
E27 Not applicable for MDD
E30 Not applicable for MDD
A01 Heating element malfunction / sensor error
A02 Heating element malfunction / sensor error
A99 Power supply error
AA1 Power supply error
A61 Not applicable for MDD
A04 Not applicable for MDD
A45 Controller error
A15 Sensor error
Alarm Reset - Power controller OFF and power ON controller again.
- Switch controller OFF and ON again via main switch or front button.

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8.0 Replacement and adjustment
8.0. Side glass replacement:
The side pane glass of the units can easily be replaced.
1. Slide the double glass pane towards the front along the top and bottom
guiding rails.
The side pane can be removed from the unit once it has slid entirety out of the unit.
CAUTION:
Once past the middle, the glass pane might fall if not properly held.
Be aware of the weight of the glass pane!
Hence do not leave it standing upright without being supported by both guide
rails or holding it.
Be careful not to chip the edges of the glass. If chipped, the glass will break later on.
For safe keeping, please put cloth or cardboard between ground/wall and glass.
2. Before placing a new side pane, clean the guiding rails. (Top, bottom and back).
3. Before sliding the new pane into the rails, ensure the black screening sides of the
pane is facing backwards.
4. Slide it all the way back till the front of the pane is in line with the front plating.