fdv 4643 fv 3643 from index 40

Service Documentation

Customer Service

Service Manual No. 49/2017 LAK-KDT-tay/02.07.18

/37 49201700SM_en

Appliance Documentation

FDv 4643 from Index 40 Fv 3643 from Index 40

Freezer for presentation of goods, ventilated

FDv 4643 Fv 3643

Service Manual No. 49/2017 FDv4643 / Fv3643

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Legal Notice

© 05.08.2016 Liebherr Appliances Kluang SDN. BHD.. All rights reserved.

No part of this documentation may be reproduced or processed, duplicated or distributed by means of electronic systems in any form whatsoever (print, photocopy or any other process) for purposes other than personal use without the written consent of Liebherr Appliances Kluang SDN. BHD..

Liebherr Appliances Kluang SDN. BHD. reserves the right to change or amend the documentation at any time without prior notice. Liebherr Appliances Kluang SDN. BHD. assumes no liability for printing errors and ensuing damages.

Other brands and product names mentioned in this handbook are brands which belong to the respective copyright holders and are hereby recognised.


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Contents

1.0 Operating and control elements 4

1.1 Significance of the control elements 4

2.0 Functions at a glance 5

3.0 Description of appliance 6

3.1 Sensor positions, schematic diagrams 6

4.0 Main components and their functions 7

4.1 Electrical components and functions 7

4.2 Refrigeration components and functions 10

5.0 Assembly instructions/Parts replacement 13

5.1 Electronics 13

5.2 Reed switch 14

5.3 Sensors 15

5.4 Evaporator fan 19

5.5 Defrost water collection pan with heater 20

5.6 LED lighting 21

5.7 Air Stream Breaker 22

5.8 Condenser fan 22

5.9 Exchange of seal 23

5.10 Door exchange 24

6.0 Technical Data 33

7.0 Messages and error codes 35

7.1 Testing the evaporator temperature 35

7.2 Calling up the minimum and maximum internal temperature 35

7.3 Parameters (with password “17”) 36

7.4 Error codes 37

7.5 Status messages 37


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1.0 Operating and control elements

1.1 Significance of the control elements

1 : Display for temperature display and control elements (see 1.1) 2 : Mute button (cancels audible alarm) 3 : Set button (activates temperature setting) 4 : Light button (interior lighting on/off) / up button (warmer temperature) 5 : Defrost button (defrost phase on) / down button (cooler temperature)

1 : LED illuminated compressor running. 1 : LED flashing switch-on delay of compressor active.

2 : LED illuminated evaporator fan running. 2 : LED flashing switch-on delay of fan active (e.g. after defrosting).

3 : LED illuminated defrost phase active. 3 : LED flashing switch-on delay of defrosting (e.g. after defrost request during compressor idle time).

4 : LED illuminated light switched on

5 : LED illuminated alarm (e.g. door open, temperature too high)

6 : LED illuminated error (e.g. sensor defect).

1

2

AUX

1

2

3

4

5

6

5

4

3


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2.0 Functions at a glance

Control: Electronics

Temperature display: Digital (actual value)

Temperature range: -10°C to -25°C(14°F to -13°F)

Temperature alarm: Visual and audible

Door alarm: Visual and audible

Volt-free contact: Not featured

HACCP function: Not featured

Interface: Not featured

Fan: Featured

Defrosting: Automatic

Interior light: Featured

Service menu: Not featured

Compressor: Standard

Solenoid valve refrigeration circuit:

Featured (for defrosting)


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Air sensor

3.0 Description of appliance

The models F(D)v 3643/4643 are dynamically cooled freezers with glass doors and LED lighting. In some versions, the appliances are fitted with castors as a series standard. A fan draws air from the interior through the evaporator and blows cold air back into the interior.

Temperature control is electronic.

Defrosting is via hot gas. FDv4643 /Fv 3643 version comes with green door version with no extra surface heater.

3.1 Sensor positions, schematic diagrams

Condensation collection pan with heater

LED lighting

Evaporator sensor

Evaporator fan

Electronics

Condenser fan

Door switch

Solenoid valve


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4.0 Main components and their functions

4.1 Electrical components and functions

Electronics

Type: Electronic microprocessor control unit from CAREL with digital display

Components: Electronics housing

Setting range: -10°C to -25°C (14°F to -13°F)

Display range: -50°C to 150°C (-58°F to 302°F)

Functions

Temperature alarm: When: As soon as the value fails to reach or exceeds the target value by -13°C ( 9°F)

Audible: Intermittent beep (suppressed during start-up)

Visual: The alarm symbol is illuminated and the display shows either code HI (too warm) or LO (too cold).

To avoid unnecessary warnings (e.g. door opening), the threshold value must fail to be reached or be exceeded for at least 15 minutes.

Door alarm: When: Door open for longer than 10 minutes

Audible: Intermittent beep

Visual: The alarm symbol is illuminated and the display shows code “dor”.

If the door is open, the alarm symbol flashes immediately and the temperature display also flashes – the actual alarm is not activated until the above mentioned time has elapsed.

Defrosting:

Activation: - Automatic, 25 minutes after every new start-up

- Automatic, every 6 hours. - Manual, when the defrost/down button is pressed for 5 seconds.

Function: Hot gas defrosting (see chap. 4.2.2.2.).

The defrost water is collected in the electrically heated collection pan and fed into the defrost water evaporation channel through a hose. During the next cooling phase this channel is heated by hot gas and the water evaporates.

Termination: The defrosting phase is generally terminated thermally 18°C/64.4°F.

If no thermal termination occurs, the defrosting phase is ended after 40 minutes (see chap. 7.5).

After 2 minutes of drip-off time plus another 4 minutes (due to minimum compressor off time c2 = 6), the compressor will start up again. The evaporator fan will start up again 5 minutes after the compressor start.

Display: The defrost symbol is illuminated during the defrost phase.

During the defrost phase, the value last displayed prior to the start of defrosting is recorded. The display is reactivated as soon as the target value is once more achieved after the end of the defrost phase, but in all cases within the alarm delay time. (The temperature alarm is deactivated for one hour after the end of the phase).

Special feature: In the event of mains power failure, all times are reset to 0! I.e. the appliance functions normally once the power supply has been restored and will initiate the next defrost phase according to the programmed interval.


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Sensors

Air sensor: Position: On the left next to the fan, clipped into the fan holder panel.

Function: - Generates the display value. The “Update Display” parameter has been set to the highest …value -> reaction is therefore very muted!

- Switches the compressor on/off. Hysteresis amounts to- -16°C( 3.6°F). (E.g.: at a target value of -18°( 0°F) the compressor will switch on at-16°C (3.6°F) and off at -18°C (0°F)).

In the event of an error (interruption or short circuit) the error symbol will be illuminated and the display will show the code E0. -> The appliance will function in emergency mode: 12 minutes on / 15 minutes off

Evaporator sensor: Position: On the below of the evaporator, clip on collection pan.

Function: - Terminates the defrosting phase at 18°C (64.4°F)

In the event of an error (interruption or short circuit) the error symbol is illuminated and the display shows the code E1. -> The appliance will continue to work in normal mode – defrosting will be ended after the time limit has expired

Switches

Door switch: Position: In the appliance plinth.

Type: Reed switch

Contact type: Make contact

Function: Activation via magnet on the door, magnet is replaceable.

Switching signal when:

Door closed: Door alarm OFF Evaporator fan ON

Door open: Door alarm ON Evaporator fan OFF

Light button: Position: On the control unit.

Function: Switches the display and interior light continuously on or off (must be pressed for about 1 second).


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Consumers / loads

Display lighting (FDv 4643):

Position: In the display

Function: Back-lights the lettering.

LED lighting: Position: On the left and right side walls

Function: Lights the interior and the goods.

Evaporator fan: Position: In front of the evaporator, on the ceiling of the inner liner.

Function: Draws out the air and blows it back into the interior through the evaporator.

Special feature: Compressor run ,fan run. Compressor off, fan off.

Exception: When door is open or during defrosting phase!

- If the door stays open long enough for the alarm to sound, the fan will start up again. - After termination of the defrost phase, the fan will restart after a time delay.

Condenser fan: Position: In front of the condenser

Function: Cools the condenser and runs parallel to the compressor

Solenoid valve: Position: Behind the compressor

Function: Opens a bypass for defrosting, feeding the hot gas directly into the evaporator

Type: 2/1 valve

Compressor: Function: On: Air sensor switch-on value.

Off: Air sensor switch-off value.

Special feature: The compressor has a restart delay of 6 minutes. Should the compressor be actuated during this time, the compressor symbol in the display will flash (compressor start request). As soon as the compressor is running, the LED will be illuminated.

Type: Standard

Heater for the defrost Collection pan:

Position: Glued to the underside of the collection pan. Function: Heats the pan during the defrost phase, in order to allow the defrost water to run off.


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4.2 Refrigeration components and functions

4.2.1 Components:

Compressor: Standard

Solenoid valve: 2/1 valve

Evaporator: Construction: Lamellar evaporator.

Type of mounting: On the ceiling

Injection point: Back left

Flow sequence: From bottom to top

Frame heater: Position: Foamed in in the housing frame section.

Type: Hot gas

Defrost water evaporation heater:

Position: In the defrost water evaporation channel

Type: Hot gas

Condenser: Type of appliance: Lamellar condenser

Type of mounting: In the appliance plinth

Refrigerant: R290

4.2.2 Function principle

4.2.2.1 Refrigeration

The solenoid valve is closed. The refrigerant runs through the customary circuit.

Evaporator

Solenoid valve

Defrost water evaporation heater and frame heater

Condenser

Dryer


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4.2.2.2 Hot gas defrosting

Defrosting of the evaporator is by hot gas. Before the defrosting phase, the compressor must be running. If there is a defrost request during the compressor idle time, the appliance will cool normally for a minute before the solenoid valve is actuated. This is to ensure that hot gas is available. When the defrost phase starts, the solenoid valve opens and hot gas flows through the bypass into the compressor. The refrigerant is then cooled down briefly by the ice-encrusted evaporator and is thus liquefied, then subsequently evaporated in the evaporator by the heat of the latter. The gaseous refrigerant which is heated by the dissipated heat from the compressor is then pumped through the circuit.

Fig. 4.2.2.2/1

Solenoid valve

Condenser Defrost water evaporation heater and frame heater

Evaporator

Dryer

Suction line

Capillary tube

Hot gas line

Evaporator


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4.2.3 Defrost water evaporation channel and solenoid valve

- The defrost water is collected in the collection pan and fed via a hose to the evaporation channel in the appliance plinth. Here the water is evaporated during normal refrigeration by the dissipated heat of a hot gas line.

- In the defrost phase, the solenoid valve feeds the hot gas directly into the evaporator via a bypass.

Fig. 4.2.3/1 Fig. 4.2.3/2

Back view Front view

Defrost water evaporation channel

Solenoid valve

Hot gas line


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5.0 Assembly instructions/Parts replacement

5.1 Electronics

Plinth panel - Remove fastening screws (red arrow) on the upper side of the plinth panel. See (Fig. 5.1/1). - Pull the panel slightly forwards and then upwards (it is hooked in at the bottom).See (Fig. 5.1/2).

Fig. 5.1/1 Fig. 5.1/2

Fig. 5.1/3 Fig. 5.1/3 Location of: a) Electronic controller b) Condensate hose c) Reed switch Remove Electronic controller - Remove fastening screws and disconnect cable. See (Fig. 5.1/4).

Plinth panel

b

c

a

Reed switch

Electronic Controller

Fig. 5.1/4


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5.2 Reed switch

Reed switch: - For Optimization version reed switch is use. See (Fig. 5.2/2).

Fig. 5.2/1 Reed switch: -The switch is mounted in the plinth panel. See (Fig. 5.2/2).

Fig. 5.2/2

Door switch

Reed switch


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5.3 Sensors

5.3.1 Air Sensor

Remove the fan cover: - Remove fastening screw. See (Fig.5.3.1/1). - Turn the fan cover clock wise to the right and lift off downwards. See (Fig.5.3.1/2).

Fig. 5.3.1/1 Fig. 5.3.1/2 Remove the holders - Remove the fastening screws (red arrow). See (Fig.5.3.1/3). - Remove left and right holder. See (Fig.5.3.1/4).

Fig. 5.3.1/3 Fig. 5.3.1/4 Remove separating plate - Remove fastening screws. See (Fig. 5.3.1/5).

-Pull Separating Plate forward. See (Fig. 5.3.1/6).

Fig. 5.3.1/5 Fig. 5.3.1/6

Separating Plate

Fan cover

Left holder


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Remove Air sensor - Remove the fastening screws of the foam. See (Fig. 5.3.1/7). - Remove 4pcs screws to lower down fan holder panel. See (Fig. 5.3.1/8).

- Detach the cable tie to remove Air sensor. See (Fig. 5.3.1/9).

Fan holder panel

Air sensor

Fig. 5.3.1/9

Fig. 5.3.1/7

Fig. 5.3.1/8


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5.3.2 Evaporator Sensor

Remove Evaporator Sensor -Remove the fastening screws of the foam. See (Fig. 5.3.2/1). -Pull evaporator sensor out of the collection pan (position described below).See (Fig. 5.3.2/2). Fig. 5.3.2/1 Exact position of evaporator sensor

Evaporator sensor

Collection pan

Evaporator sensor

Foam

Fig. 5.3.2/2


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5.3.3 Electronic Controller and Sensors Connections Remove Back cover - Remove the 6pcs screws and the Back cover. See (Fig. 5.3.3/1). - Cable is directly connected to the electronic controller in the Plinth panel. See (Fig. 5.3.3/2). - Unscrew the fastening screws of the Cover Grill Rear. See (Fig. 5.3.3/3). Fig. 5.3 /11 Fig. 5.3.3/1 Fig. 5.3.3/2 Fig. 5.3.3/3 Cable - Loosen clamps and pull out sensors through the back wall. See (Fig. 5.3.3/4). - Sensors are directly connected to the electronic controller in the plinth panel. See (Fig. 5.3.3/5). Fig. 5.3.3/4 Fig. 5.3.3/5

Back cover

Electronic controller

Plinth panel

Evaporator Sensor wire Air Sensor wire

Cable

Clamp

Cable

Cover Grill Rear


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5.4 Evaporator fan

Remove separating plate - Remove separating plate (see chapter 5.3). Fig. 5.4/1 Fig. 5.4/2 Remove fan holder panel -Remove fastening screws fan holder panel. See (Fig. 5.4/3).

Fig. 5.4/3 Remove Evaporator fan

- Disconnect the connector at the back and pull it through into the interior. See (Fig. 5.4/4). - Remove the fastening screws of the evaporator fan. See (Fig 5.4/5).

Fig. 5.4/4 Fig. 5.4/5

Connector

Fan holder panel

Fan holder panel


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5.5 Defrost water collection pan with heater

Separating plate: - Remove the foam (see chapter 5.3).

Fig. 5.5/1 Fig. 5.5/2 Remove Collection Pan - Remove fastening screws and lower the collection pan. See (Fig. 5.5/3).

- The heater is glued to the underside of the collection pan. See (Fig. 5.5/4). - Disconnect the cables at the back and pull through the rear wall into the interior. See (Fig. 5.5/5).

Fig. 5.5/3

Collection Pan

Connector for heater

Heater

Collection Pan

Heater

Fig. 5.5/4

Foam

Fig. 5.5/5


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5.6 LED lighting

Display lighting (FDv 4643): - Remove screws and pull display upwards. See (Fig. 5.6/1).

- Remove the LED strip fastening screws. See (Fig. 5.6/2).

Fig. 5.6/1 Fig. 5.6/2 Interior light: - Remove fastening screw Holder above. See (Fig. 5.6/3). - Remove fastening screws Air Stream Breaker below. See (Fig. 5.6/3).

- Remove fastening screws and LED light cover. See (Fig. 5.6/3). - Disconnect LED strip and remove. See (Fig. 5.6/4).

Fig. 5.6/3 Fig. 5.6/4

LED strip

Above

Below

Air Stream Breaker

LED strip

Holder

LED light cover


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Remove Main adaptor: - Remove two pcs screws and take out main adaptor. See (Fig. 5.6/5).

Fig. 5.6/5

5.7 Air Stream Breaker

Remove Air Stream Breaker: - Remove the fastening screws and take out Air Stream Breaker. See (Fig. 5.7/1)

Fig. 5.7/1

5.8 Condenser fan

Remove Condenser fan - Remove plinth panel (chapter 5.1). - Remove screws and take out fan together with holder. See (Fig. 5.8/1).

Fig. 5.8/1

Condenser Fan

Main adaptor

Air Stream Breaker


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5.9 Exchange of seal

Remove seal: - Take hold of the seal at the bellows or magnetic strip and gently move it to and fro

to draw it out of the door frame. See (Fig. 5.9/1).

Fig. 5.9/1

Installing the seal: - First, press the new seal into the door frame at the corners. (Fig. 5.9/2).

- Then press the seal completely into the groove all along the door frame. (Fig. 5.9/3).

NOTE: The dart profile of the seal must be completely “hooked into” the groove.

- I.e. draw the bellows slightly to one side and check the correct position of the seal

all the way round.

Fig. 5.9/2 Fig. 5.9/3

�

�


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5.10 Door exchange

Remove top covers: - With Fv 3643, unclip the cover of the hinge plate. See (Fig. 5.10/1). Remove fastening

screws from the top of the appliance. See (Fig. 5.10/2).

- With FDv 4643 remove the fastening screws and pulls the display upwards. See (Fig.

5.10/3).

FV 3643:

Fig. 5.10/1 Fig. 5.10/2

FDv 4643:

Fig. 5.10/3

Cover


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Plinth panel: - Remove stoppers and fastening screws on the upper side of the Plinth panel. (Fig. 5.10/4).

- Pull the Plinth panel slightly forwards and then upwards (it is hooked in at the bottom) (Fig. 5.10/5).

Fig. 5.10/4 Fig. 5.10/5


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Dismounting the door: - Remove the inner fastening screw (red arrow) of the turn hinge. See (Fig. 5.10/6). - Unscrew the nut mounting on the mounting plate. See (Fig. 5.10/7).

NOTE: The door must either be held by a 2nd. person or supported by an object.

- Hold the turn hinge with pliers (pre-tensioning of the torsion rod) and loosen both

the outer screws. See (Fig. 5.10/8).

- Pull door together with turn hinge (Fig. 5.10/9) downwards.

Fig. 5.10/6 Fig. 5.10/7

Fig. 5.10/10

Fig. 5.10/8 Fig. 5.10/9

Turn hinge


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Bottom turn hinge: - Unscrew nut and remove turn hinge. See (Fig. 5.10/10).

- Place turn hinge on torsion rod of the new door and fix with nut.

NOTE: The turn hinge must be positioned so that when mounting the door in

closed condition there is a pre-tension of at least 90°. See (Fig. 5.10/11).

Fig. 5.10/10 Fig. 5.10/11


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Mounting the door: -The thread through the upper hinge plate. See (Fig. 5.10/12). NOTE: The door must either be held by a 2nd. person or supported by an object.

- Hold the hinge plate with pliers, pre-tension and set into the (Fig. 5.10/13) screws

(Fig. 5.10/14).

- Screw the turn hinge tight.

Fig. 5.10/12

Fig. 5.10/13 Fig. 5.10/14

Covers: - Check whether the door closes correctly even with a small opening angle.

- Mount the Plinth panel and top covers.


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5.10.1 Changing over the door hinges

The models are available ex-factory with door hinges on the left (special version).

However, the door is constructed to allow a retrofit change-over of the door hinges (right to left / left to right). This

task must be carried out by professional technicians.

The process is largely identical to that of changing the door. However, on the dismounted door, the torsion rod must

be changed over.

Remove Top cover: - Unclip the Top cover. See (Fig. 5.10.1/1).

Fig. 5.10.1/1

Top hinge bushing: - Remove fastening screw .See (Fig. 5.10.1/2).

- Pull out Top hinge bushing. See (Fig. 5.10.1/3).

- Re-insert in Top hinge bushing to left side. See (Fig. 5.10.1/4).

- Re-install the fastening screw. See (Fig. 5.10.1/5).

- Clip back the Top cover to right side. See (Fig. 5.10.1/6).

Fig. 5.10.1/2 Fig. 5.10.1/3

Fig. 5.10.1/4 Fig. 5.10.1/5

Top cover

Top hinge bushing


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Fig. 5.10.1/6

Remove Torsion rod: - Pull out Torsion rod. See (Fig. 5.10.1/7).

- Remove fastening screw. See (Fig. 5.10.1/8).

- Pull out the Bottom hinge bushing. See (Fig. 5.10.1/9).

-Re-install the fastening screw and Bottom hinge bushing to left side. See

(Fig. 5.10.1/10).

- Re- insert the Torsion rod to the left side. See (Fig. 5.10.1/11).

-Unscrew the nut to remove Torsion rod from right side to left side. See

(Fig. 5.10.1/12).

-Use the Plier to hold tight Turn hinge while install nut with Spanner. See

(Fig. 5.10.1/13).

-The Torsion rod on Turn hinge changed position from right to left side. See

(Fig. 5.10.1/14).

-Remove the thread and nut from right to left side. See (Fig. 5.10.1/15).

-The thread and nut was installed to left side. See (Fig. 5.10.1/16).

-Re-install the fastening screws of the Turn hinge. See (Fig. 5.10.1/17).

-Unclip the cover on Plinth panel relocate to right side. See (Fig. 5.10.1/18).

-Reinstall fastening screws Plinth panel. See (Fig. 5.10.1/19).

Fig. 5.10.1/8 Fig. 5.10.1/9

Torsion rod

Bottom hinge bushing

Top cover

Fig. 5.10.1/7


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Fig. 5.10.1/10 Fig. 5.10.1/11

Fig. 5.10.1/12 Fig. 5.10.1/13

Fig. 5.10.1/15

Fig. 5.10.1/14

Turn hinge

Nut

Thread


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Fig. 5.10.1/16 Fig. 5.10.1/17

Fig. 5.10.1/18

Fig. 5.10.1/19

Cover

Cover

Turn hinge

Plinth panel


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6.0 Technical Data

Evaporator pan heater: Wattage: approximately 67 watts

Voltage: 220-240Volts

50/60Hz

Wattage: approximately 67 watts

Voltage: 115Volts

60Hz

LED lighting: Wattage: approximately 19.5 watts


50/60Hz

Wattage: approximately 19.5 watts

Voltage: 115Volts

60Hz

Condenser fan: Wattage: approximately 60 watts

Speed: 1300 rpm

Voltage: 220-240 Volts

50/60Hz


Speed: 1300rpm

Voltage: 115Volt

60 Hz

Evaporator fan: Wattage: approximately 13 watts

Speed: 1550 rpm


50/60Hz


Speed: 1550 rpm

Voltage: 115 Volts

60Hz


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Solenoid valve: Wattage: approximately 4.5 watts


50/60Hz

Wattage: approximately 4.5 watts

Voltage: 115Volts

60Hz

Sensor values:

Temperature [°C] Temperature [°F] Resistance value [kOhm]

+50 +122

approximately 4

+45 +113

approximately 4.9

+40 +104 95

approximately 5.8

+35

+95

approximately 6.9

+30

+86 approximately 8.3

+25

+77 approximately 10

+20

+68 approximatley 12

+15

+59 approximatley 14.7

+10 +50 approximately 18

+5

+41 approximately 22

0 +32 approximately 27

-5 +23 approximately 33.9



-20 -4 approximately 67

-25

-13 approximately 86.4

-30 -22 approximately 111.3

-35

-31 approximately 144

-40 -40 approximately 185


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7.0 Messages and error codes

7.1 Testing the evaporator temperature

- Press the “Mute “button ( 5 seconds) for access to the first parameter level. - Press the “Defrost” button repeatedly until the parameter “d/1” is displayed. - After pressing the “Set” button the current temperature of the evaporator sensor is displayed.

7.2 Calling up the minimum and maximum internal temperature

- Press the “Mute “button (5 seconds) for access to the first parameter level. - Press the “Defrost” button repeatedly until the parameter “rt” is displayed. -> After pressing the “Set” button, the time period in which the internal temperature was measured is displayed.

- Press the “Defrost” button repeatedly until the parameter “rL” is displayed. -> After pressing the “Set” button, the coldest internal temperature within the period is displayed.

- Press the “Defrost” button repeatedly until the parameter “rH” is displayed. -> After pressing the “Set” button, the warmest internal temperature within the period is displayed. Deleting the saved values:

Press the “Mute” button (5 seconds) for access to the first parameter levels. - Press the “Defrost” button repeatedly until the parameter “rt” is displayed. -> After pressing the “Set” button, the period in which the internal temperature was measured is displayed.

- Press and hold down the “Defrost” button for five seconds -> “rES” will appear in the display.


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7.3 First level parameter (without password entry)

- Press the “Mute “button (5 seconds) for access to the first parameter level. -Use the “Light” or the “Defrost” button to select the parameters. - Pressing the “Set” button will display the relevant value. - Repeat pressing of the “Set” button will once more display the parameter. - Press the “Mute” button (5 seconds) to leave the parameter level.

Parameters Value Notes

St Pre-set target value -18 Set value rd Actuating variable (hysteresis) 2

rt Temperature monitoring interval --- rH Max. temperature --- rL Min. temperature --- dI Defrost interval 6

dt1 Evaporator temperature at termination of defrosting

6

dt2 Auxiliary evaporator temperature at termination of defrosting

15

dP1 Max. defrosting time 15 Not relevant dP2 Max. defrosting time auxiliary evaporator 30 Not relevant dd Drip-off time after defrosting 2 d8 Alarm delay after defrosting 1

d8d Alarm delay after door opening 5

d/1 Evaporator sensor display --- Not relevant d/2 Evaporator sensor 2 display --- Not relevant AL Lower temperature alarm limit 5 AH Upper temperature alarm limit 5 Ad Alarm delay 15 F1 Fan start temperature 5 Fd Fan stop after drip-off phase 4

Changes to the parameters may only be made after consultation with the customer service centre responsible!


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7.4 Error codes

Error code Defective component Audible alarm/ alarm contact

Emergency mode

E0 Air sensor ON/ON 12 minutes ON, 15 minutes OFF

E1 Evaporator sensor ON/ON Normal mode (Defrosting phase terminated by time limit)

EE Electronics defective (operating parameters)

ON/ON All off

EF Electronics defective (control parameters)

ON/ON All off

7.5 Status messages

Message Condition Audible alarm/ alarm contact

HI High temperature alarm ON/ON

LO Low temperature alarm ON/ON

Ed1 Defrost phase time-terminated

OFF/OFF

dor Door alarm ON/ON

dFb Manual defrosting started

dFE Manual defrost phase terminated

ON Appliance switched ON

OFF Appliance switched OFF

fdv 4643 fv 3643 from index 40

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