frijado 9124849 Resource Library Archive User Manual

9124849 SERVICE MANUAL MTT US

9124849 Resource Library Archive

– NOTICE –
This service manual is prepared to be used by trained service technicians and should not be used by those not properly qualified. If you have attended a training for this product, you may be qualified to perform all repair procedures, replacements and adjustments described in this service manual.
The information presented in this document is only valid for MTT configurations and is not intended to be all encompassing. The individual specifications may differ.
Procedures for which you do not have the necessary tools, instruments or skills should not be performed by you.
The information presented in this document is valid for standard display cabinet configurations, specifications for custom configurations may differ. No rights can be derived from this document, specifications and technical data are subject to amendment without prior notice.
© Reproduction of this service manual, without the express written consent of Fri-Jado, is prohibited.

© 2023 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.
Modifications:
In case of unauthorized modifications in or on the unit, every liability on the part of the manufacturer becomes null and void.
The information presented in this document is valid for standard counter configurations, specifications for custom configurations may differ. No rights can be derived from this document, specifications and technical data are subject to amendment without prior notice.

 Introduction

1.1 General
This manual is intended for trained technicians, performing repairs of the MTT.
The features and controls are being described, along with directions for the safest and most efficient way to service these counters.
All pictograms, symbols and drawings in this manual apply to all available MTT models.
1.2 Pictograms and symbols
In this manual, the following pictograms and symbols are used:
WARNING symbols:
WARNING
Possible physical injury or serious damage to the unit.
WARNING
Risk of Fire.
WARNING
Hazardous electrical voltage.
WARNING
Danger of getting injured by hot surfaces.
SAFETY symbols:
SAFETY
Wear safety gloves for installation repair and dismantling.
SAFETY
Wear eye protection
SAFETY
Disconnect power plug from outlet
SAFETY
Clean hands and/or tools
Notification
Take care off:
  Reading
Instructions referred to, to be read.
Minimum room floor area.
Cleaning
Not Allowed to use water hose.
Cleaning
On regularly interval.
Disposal
According local regulations.
Recycling symbol
1.3 Identification of the unit
The identification plate can be found on the outside of the machine, and contains the following data:

• Name of the supplier or manufacturer
• Model
• Serial number
• Year of construction code
• Voltage
• Frequency
• Power consumption

1.4 Moving

• Before moving the unit, first switch off the mains switch and disconnect power by pulling the plug from the wall socket.
• Let unit cool down.
• Remove all product from the unit.
• Always keep the unit in upright position.

1.5 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 qualified 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.
Notes:

• To avoid short-circuiting, never clean the unit using a water hose.
• The shelves, all glass parts and the back panel of the unit can get hot.
• All units must be cleaned regularly to ensure proper functioning.
• Do not store explosive substances; such as aerosol cans with flammable propellant, in this appliance.

1.7 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 no tallowed to use a multi plug or extension cord.
Such can result in fire, electrical shock, or personal injury.
Failure to follow these instructions can result in serious injury or even death.
1.8 Outdoor use restrictions
WARNING
To avoid short-circuiting, the units may not be used outdoors nor in a rainy or very moist environment.
1.9 Service and technical support
In case of malfunctions which are not fixable by you, please contact your supplier or Fri-Jado. Service@Frijado.com
Make sure you have the following data available:

• Model.
• Serial number.

1.10 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.

Detailed description

The MTT is an open front multilevel self-service  heated table top display cabinet intended for hot presentation of packaged food products.
Each shelf has a self-contained 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 infiltration of cold ambient air.
Any air in- and outlet openings should be kept clear.
Digital controllers are installed to individually regulate the temperature for each shelf inside the cabinet. To make sure the cabinet is installed, operated and serviced in a safe manner, the instructions provided by the manufacturer should be adhered to at all times.
Cabinets can be ordered with a pass-through (PT) option (utilizing rear folding doors) or with a solid back (SB).
The MTT is ETL listed ;
(conforms to UL standard 197, NSF standard 4 and CSA standard C22.2 no. 109).
The information presented in this document is valid for standard counter configurations, specifications for custom configurations may differ.
No rights can be derived from this document, specifications and technical data are subject to amendment without prior notice.

Unpacking

1. Place the box, containing the MTT close to the counter where the units needs to be placed on, preferably at the same level. Be sure to check on transport damage before unpacking.

2. Remove the strap and lift the box from the pallet.

3. Remove all the Styrofoam inserts, the foil wrap and the protective corners on the top-glass.
   Remove all package material with respect to local regulations

4. Take the manual, power cord and the unit out and lift the unit from the pallet onto the counter.
   Do not lift the unit on the front panel.

3.1 Plinth set
Mandatory for the US market: plinth set for the MTT.

1. Slide one of the side plinths with the fittings over the legs. Make sure the plinth lays flush with the back side of the unit.
2. Slide the front and back plinths underneath the unit, snapping them into place.
3. Close everything up by placing the second side plinth around the legs, snapping into the back and front plinth.
4. Mandatory for the US market: Seal the bottom edges of the plinth to the counter by adding a silicon sealant.

If the power cord needs to go underneath the unit, the back plinth will have an opening which needs to be facing upwards.
If the power cord goes around the unit, the opening of the back plinth must face downwards.

 Installation

Placement of the unit
WARNING

Position the unit on a flat and horizontal surface.

A temporally inclined plane of maximum 5° is allowed.

• Be sure, the personnel have sufficient room to work with the unit.
• Do not position a unit near a doorway, a ventilation device or a refrigerator in order to avoid any negative effects on the unit’s operation by a draft airflow.   The unit is designed for a maximum draft of 0.65 ft./sec (0.2 m/s ).
• Do not place into direct sunlight.
• The unit should not be used below 68 °F (20 °C) ambient temperatures.
• The unit has a mains plug, and must be connected to a wall socket with the proper mains voltage.

It is not allowed to use a multi plug or extension cord.  4.1 Air blockers
It is important that the air blockers remain on the shelf.
Without the air blockers the performance of the MTT cannot be guaranteed!
The installation of the air blockers is shown on the figures on the left.

 Operation; Control panel

The display and/or set value is not the product/unit temperature. On/Off Switch(es):
The main switch is located left underneath the front of the unit.

Controls:
Note: The controls are located behind the front panel of the unit.

To access the controls:

1. Push at the upper middle of the panel.
2. Stop pushing when you have reached the end, then gently release to place the front panel ajar.
3. Pull the front panel from the magnetic lock to fully open the front panel. To close the panel, attach the front panel to the magnetic lock and keep pushing until you can feel or hear the click again.

Temperature
1 = Temperature controller(s) (heating).
2 = On/Off switch.
Display multi temperature controller
A controller for each shelf to switch it on/off and control it separately.
The controllers are positioned in the same way as the shelves.
So letter ´A´ shows the top shelf controller and letter ´B´ shows the bottom shelf controller.
5.1 Operation; Temperature controller

Temperature controller

| Power on/off button*
---|---
| Up-button
| Down-button
| Set-button

Product temperature Using the multi-temperature controllers
The shelves can be controlled individually or even  turned off completely.
In this way optimal holding conditions for different food groups can be achieved (for example: depending on holding time, product quality, packaging and accessories used).
When set to the same temperature uniform temperatures can be attained throughout the cabinet and energy can be saved.
Although every combination of settings is  possible (ranging from completely off to a setpoint between 104°F and 158°F), certain settings may influence the time it takes for a shelf to reach operating temperature.
For example, if only one shelf is turned on it may  take over 60 minutes instead of approx. 30 minutes when shelves are all set to the same temperature.
The unit is set at 149°F intake air temperature.
If required, this temperature can be adjusted.
At an ambient temperature of 68°F and an initial core temperature of 185°F, these factory settings of the unit’s temperature ensure a constant core temperature of at least 149°F for 4 hours.
Switching-on the unit

1. Switch on the power switch (the fans will start blowing).
2. Switch the heating on, by means of the temperature controller.
3. Preheat the unit (may take between 30 and 90 minutes depends on controller settings).

Switching off

1. Remove all products from the unit. In order to avoid temperature drop of the products, store them in another warm holding unit.
2. Switch the heating off.
3. Switch the main power off.

5.2 Operation; Loading and adjusting
LOADING TEMPERATURE
Strongly advised core temperature 185°F This means the core temperature of the products loaded into the MTT preferably should be 185°F.
This preferred temperature is depending on product type and packaging.
To determine optimal storage conditions for different product/packaging/accessory combinations, please contact Fri-Jado.

Temperature controller

| Power on/off button*
---|---
| Up-button
| Down-button
| Set-button

*Switch on/off: hold for several seconds

Loading the unit

• Only place products that have a core temperature of (if possible) 185°F.
• The hot products need to be packaged in bags or containers that are suitable for this purpose.
• To ensure a good contact with the heated trays, only place a single layer of products.
• The maximum loading height is 2 inch below the bottom of the shelf/air guide above.
• The maximum carrying-capacity per shelf is 20.0 lb/ft by equal load. Checking the temperature in the unit
• During operation the display of the thermostat shows the temperature at the probe in the unit.
  The indication ON will lit when the elements are active.

Checking the set temperature

1. Scroll through the folders with the  UP-button and the DOWN-button until you find the folder Pb1, Pb2 or Pb3.
2. Press SET to view the value measured by the corresponding probe.

Adjusting the set temperature

1. During operation the display of the temperature controller shows the temperature in the unit. (Not product temperature)
2. Push once on the SET-button. The set temperature will appear on the display.
3. Push the UP-button and DOWN-button within 15 seconds.
4. Adjust the set temperature by means of the UP-button and the DOWN-button.
5. Push once on the SET-button to store the new set temperature.

5.3 Operation; Parameter settings
Controller settings: Top shelf
Parameter setting, different from default.
User parameters

Installer parameters:

rE1| HC1| Cold “C”(0) or Hot “H”(1) operation| H|
---|---|---|---|---
HA1| Max. Temp. Alarm| 212| °F
CnF| dro| Unit of Measurement (0=C 1=F)| 1|

Controller settings: Bottom shelf
Parameter setting, different from default.
User parameters

Installer parameters:

rE1| HC1| Cold “C”(0) or Hot “H”(1) operation| H|
---|---|---|---|---
HA1| Max. Temp. Alarm| 212| °F
CnF| dro| Unit of Measurement (0=C 1=F)| 1|

 Trouble shooting

6.0 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 switch in the meter cup board.
• Are all the switches in the correct “on” position?

• 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.

6.1 Replace the mains cord
WARNING
Hazardous electrical voltage.
If the mains cord is damaged, it must be replaced by a fully certified and qualified person, in order to avoid hazards.

| Power| Current| Resistance
---|---|---|---
Shelf| Watt| Ampere| Ohm
MTT 60| | |
Top| 570| t.b.d.| t.b.d.
Bottom| 570| t.b.d.| t.b.d.
MTT 90| | |
Top| 855| t.b.d.| t.b.d.
Bottom| 855| t.b.d.| t.b.d.
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

6.2 Testing heating element
Resistance

1. Remove wiring (two) from the element.
2. Connect the probe of the multimeter to each of the wires.
3. Test the probe with a Ohm tester, values see table.

Current

1. Place ampere pliers around red wire of element.
2. In normal working condition, test current see table. (230V version)

6.3 Testing PTC sensor

1. Remove wiring from the sensor.
2. Connect a temperature tester to the probe of the sensor for comparison.
3. Test the probe with a Ohm tester.

•  Fuse Blown
•  Loose wire connection
Main fuse or breaker blown| •  Wiring incorrectly
•  Short circuit heating element
•  Short circuit fan element
•  Short circuit wiring
Illumination does not work| •  Led malfunction
•  Tumble switch malfunction
•  Led driver malfunction
•  Loose / short circuit wiring connection
No heating| •  Heating element malfunction
•  Relay malfunction
•  Loose wiring connection
•  Thermostat  malfunction
•  Loos wiring connection
•  Air flow not functioning
Unit does not reach desired temperature| •  Heating element malfunction
•  Strong air current along unit / Draft
•  Sensor malfunction
•  Doors not closed
No indication on controller| •  Electronic controller malfunction
•  Blown fuse
•  Loose wiring connection
No air flow inside unit| •  Fans do not work
•  Blown fuse
•  Loose wiring connection
•  24 Vdc power supply malfunction
Part description| Symptoms| Possible causes| Solution / Action
---|---|---|---
Heating element| Unit is not reaching the set temperature| Wiring Element malfunction
Air flow not Working, Fans not turning| Check wiring
Check power on elements per shelf Check current with AC current tester
Check Resistance Replace element Check wiring
Check power on fans per shelf Replace fan box / Power Supply
Tumble switch| 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| Broken sensor Loose sensor
Broken sensor Loose sensor| Replace sensor
Check sensor wiring
Replace sensor
Check sensor wiring

Maintenance

PMA
Stands for Preventive Maintenance Advice.

• How often a service call should be made to verify the unit.

Part description| 3 yrs.| 4 yrs.| 5 yrs.| 6 yrs.| 7 yrs.| 8 yrs.| 9 yrs.| 10 yrs.
---|---|---|---|---|---|---|---|---
Child guard assy.| X| | | X| | | X|
Assy. flap door (PT only)| X| | | X| | | X|
Heating Element/Shelf| X| | | X| | | X|
Fan Box shelves| | X| | | | X| |
Compact fan 614 NN electrical box| | | X| | | | | X
LED 3000k + driver| | | X| | | | | X
Sensor PTC 1000| | | X| | | | | X
Power supply unit| | | | X| | | |
Controller| | | | X| | | |

RMA
Stands for Recommended Maintenance Advice.

• How often a parts must be checked or replaced.

customer)
On call| 1/year| Top Glass| Check on chips, if visible, replace
On call| 1/year| Air out opening shelf| Check on blockage/clean

Replacement and adjustment

8.1 Opening Electra box

1. Unplug power cable from socket.
2. Push at the upper middle of the front panel.
3. Stop pushing when you have reached the end, then gently release to place the front panel ajar.
4. Pull the front panel from the magnetic lock to fully open the front panel.
5. Unscrew the two bolts, holding Electrical box in position.
6. Gently slide out electrical box towards you, be sure not to damage or strain cables.

8.2 Top glass removal

1. Loosen screw (2x) holding down the top glass bracket.
2. Remove back panel mounting screws (4x).
3. Take off top glass.

8.3 Side glass removal

1. Remove back panel mounting screws (4x) See top glass removal.
2. Slide out side glass backwards.

8.4 Flap door removal PT

1. Remove back panel mounting screws (4x) See top glass removal.
2.  Remove stud screw, one on each side, while holding the flat door, to prevent the door from falling out.

8.5 Fan box removal

1. Remove back panel mounting screws (4x) See top glass removal.
2. Remove flap door from section you need to replace the fan box.
3. Remove Side glass refer 8.3 (Left side seen from back of unit).
4. Unscrew rear cover shelf (2 screws)
5. Take out rear cover
6. Unscrew Stud screw (2 x)
7. Remove glass holder
8. Unscrew fan box and take out, be careful not to damage cable!
9. Disconnect Wago connections in the column
   Be aware of the positive and negative wiring.
   Use a Multimeter to check.

Specifications

3/4 x 33 7/16
Nr. of presentation levels| | 2
Shelf dimensions| “| 16 1/8 x 19 11/16| 16 1/8 x 31 1/2
Shelf display area| ft2| 4,41| 7,10
Usable display volume| ft3| 1,23| 1,96
Specification| Unit| Model
---|---|---
Performance| | 24-2| 36-2
Shelf display area| ft2| 4,41| 7,10
TEC at climate class 0| BTU/h| 2388| 3822
TEC at climate class 0| BTU/day| 57153| 91889
TEC/TDA at climate class 0| BTU/day/ft2| 12960
Sound pressure| dB(A)| < 55
Minimum ambient temperature| °F| 68
Maximum ambient temperature| °F| 86
Maximum relative air humidity| %| 60
Specification| Unit| Model
---|---|---
Electrical| | 24-2| 36-2
Electrical connection| | NEMA 6-15P*
Nominal voltage| V| 1N~ 208
Nominal frequency| Hz| 50/60
Maximum power| W| 1275| 1916
Nominal current| A| 5,6| 8,4
Required fuses| | 1 x 20A
Heating fan power| W| 7| 10
Nr.of heating fans (total)| | 4| 6
Heating element power per shelf| W| 570 (-0/+10%)| 855 (-0/+10%)
LED lighting power| W| 14| 25

Exploded view MTT SB

1

2| Air guide MTT 24
Air guide MTT 36| 9382062
9382061| 1

1

3| Side glass holder
Screw M5x16 socket head cap, large Collar bush PTFE 10x5x3,5| 9404010
4280558
3702342| 2
2
2
4| Back panel outside MTT 24
Back panel outside MTT 36| 9404027
9404011| 1
1
5| Side glass left packed| 9402005s| 1
6| Side glass right packed| 9402010s| 1
7| Air blocker left top| 9384068| 1
8| Air blocker left rear| 9384589| 1
9| Air blocker right top| 9384069| 1
10| Air blocker right rear| 9384588| 1
11| Magnetic push latch| 9401017| 1
12| Assy. child guard MTT 24
Assy child guard MTT 36| 9400033s
9400003s| 1

1

13| Front cover MTT 24
Front cover MTT 36| 9404023
9404020| 1

1

14| Leg rubber| 9171125| 4
15| Spring loaded hinge pin| 9382773| 2

10.1 Exploded view MTT PT

1
---|---|---|---
2| Air guide MTT 24
Air guide MTT 36| 9382062
9382061| 1
1
3| Side glass holder
Screw M5x16 socket head cap, large Collar bush PTFE 10x5x3,5| 9404010
4280558
3702342| 2
2
2
4| Assy. flap door MTT 24
Assy. flap door MTT 36| 9400012s
9400011s| 2
2
5| Side glass left packed| 9402005s| 1
6| Side glass right packed| 9402010s| 1
7| Air blocker left top| 9384068| 1
8| Air blocker left rear| 9384589| 1
9| Air blocker right top| 9384069| 1
10| Air blocker right rear| 9384588| 1
11| Magnetic push latch| 9401017| 1
12| Assy. child guard MTT 24
Assy .child guard MTT 36| 9400033s
9400003s| 1

1

13| Front cover MTT 24
Front cover MTT 36| 9404023
9404020| 1

1

14| Leg rubber| 9171125| 4
15| Spring loaded hinge pin| 9382773| 2

10.2 Exploded view MTT Shelves

1
21| Glass pane shelf hot MTT 24 bottom shelf Glass pane shelf hot MTT 36 bottom shelf| 9382035
9382141| 1
1
22| Assy. fan box V2 MTT 24
Assy .fan box V2 MTT 36| 9380354s
9380353s| 1
1
23| Heating element [475×400] 570W 208V MTT 24 top shelf
Heating element [775×400] 855W 208V MTT 36 top shelf| 9402103
9402102| 1
1
24| Heating element [475×400] 570W 208V MTT 24 bottom shelf
Heating element [775×400] 855W 208V MTT 36 bottom shelf| 9402103
9402102| 1
1
25| Glass clamp shelf MTT 24 V2
Glass clamp shelf MTT 36 V2| 9384939
9384937| 1
1
26| Rear cover shelf MTT 24 SB Rear cover shelf MTT 36 PT| 9384932
9384931| 2
2

10.3 Exploded view MTT Electrical

2
31| LED, right 3000K 12V L=400mm MTT 24
LED, right 3000K 12V L=700mm MTT 36| 9382075s
9382067s| 2
2
32| LED mounting bracket [Full cover] LED armature support bracket| 9384093
9384091| 2
2
33| Compact fan 614 NN| 9381015| MTT 24 =1
MTT 36 = 2
34| Power supply 24V/DC 20W| 9301033| 1
35| LED driver 100W 12V 50/60hz (UL)| 9381038| 1
36| Eliwell IC PLUS 902 NTC-PTC, 208V UL| 9281071| 2
37| Switch black 1-0 250 volt 22 x 30| 9181008| 1
38| Sensor PTC 1000, 1,5mtr| 9391012| 1
39| Power connector IEC C14 male snap in| 9401011| 1
40| Power cord IEC C13 socket to NEMA 6-15P plug| 9401015| 1

Electrical schematic wiring

11.1 Electrical schematic circuit

Fri-Jado B.V.
Blauwhekken 2
4751 XD Oud Gastel
The Netherlands
Tel: +31 (0) 76 50 85 400
Fri-Jado Inc.
1401 Davey Road, Suite 100
Woodridge IL 60517
USA
Tel: +1-630-633-7950
https://www.frijado.com

References

• Fri-Jado - Making food irresistible

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