Transcript
TECHNICAL SUPPORT SERVICE
TECHNICAL STUDY t e c h n i c a l
PRODUCT:
Refrigerator
RANGE:
No-frost fridge-freezers
Date: 19/07/2007 Document Nº: 7498
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How to use this manual This document is intended for all persons providing technical support services (T.S.S.). It is designed to facilitate the repair of the product described. It provides documentary support for making technical consultations. This manual contains notes with warnings about safety issues:
Electrical hazard: This identifies potential risks for the product. Such risks may cause permanent damage to the product
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Warning: This identifies information or circumstances that
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Important: This identifies information that is critical for a
may cause personal injuries or death.
correct understanding of the product.
© Copyright by Fagor Electrodomésticos S.Coop. 2007. All rights reserved. The total or partial reproduction of this document, by any procedure and on any type of media, is prohibited without written authorisation from the holder of the usage rights. Breach of this copyright will be pursued in conformity with applicable legislation and may lead to criminal charges. Fagor Electrodomésticos reserves the right to introduce, without prior notification, any modifications to the characteristics of its manufactured products.
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Table of contents
1.- Warnings and precautions ...................................1 2.- Specifications ........................................................2 3.- Functional description .........................................4 3.1.- General description ............................................................. 4 3.2.- Troubleshooting ................................................................. 13 3.3.- Assembly and disassembly instructions ............................ 14 3.4.- Drawings and diagrams ................................................... 20
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Warnings and precautions
1.- Warnings and precautions This study refers to the following no-frost fridge-freezer models. Models: Type: DUO-23I NFT TCH
Height: 1860 mm
Width: 598 mm
Type: DUO-24I NFT TCH
Height: 2010 mm
Width: 598 mm
● Refrigerant These products are filled with Isobutane refrigerant.
Isobutane (R 600a)
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This refrigerant is inflammable, and products which use it can be identified as follows: - R 600a is displayed on the specifications plate - R 600a is displayed on the compressor - Inflammable symbol on the compressor
When undertaking repairs with Isobutane refrigerant the following precautions must be taken. In all cases: 1.- Make sure the place where the repairs are to be carried out is well-ventilated. 2.- Check that there are no naked flames, heat sources, or electric arcs. 3.- Do not smoke. 4.- Wear safety goggles and protective gloves. Do not wear clothes made of synthetic fibres. In the workshop: A specific area should be reserved, with full or half-height walls, to be used for working only with circuits containing isobutane. In the user’s home: For repair operations, use an area with an external exit. If necessary, the refrigerator must be moved. Do not carry out repairs in enclosed areas. Ventilate by opening doors and windows.
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Features 2.- Features ● Holiday function Affects the refrigerator section. Activated and deactivated manually. When it is activated, the refrigerator automatically maintains a ‘special’ setting of +14°C. When the function is deactivated, it operates according to the previously selected setting. ● Super-Cooling Function Affects the refrigerator section. Activated manually. For a fixed time (6 hours), the fridge is cooled as much as possible, to +1 ºC, changing the temperature which had been set. After 6 hours, the indicator light goes out, and the fridge returns to the temperature which had been set previously. This function can also be interrupted manually before the 6-hour period is completed. The holiday function cancels the super-cooling function. ● Super-Freezing Function Affects the freezer section. Activated manually. The function maintains the freezer section at an ambient temperature of -33°C until it is manually deactivated or until the period of 52 hours is completed. If it is selected before 4 hours have passed since the last time it was defrosted, the defrosting cycle will not take place. If more than four hours have passed, a defrosting cycle takes place. After 52 hours, the indicator light goes out, and the fridge returns to the temperature which had been set previously. When the function is deactivated automatically or manually, a defrosting cycle takes place if more than 4 hours have passed since the last defrosting cycle and then it returns to normal operation. ● Refrigerator door open alarm Affects the refrigerator section. An acoustic and visual alarm (fixed red LED) is activated in the following two situations: - When the refrigerator door is open for more than two minutes. - When the refrigerator door is open for more than 10 seconds when the holiday function is activated.
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Features ● Listeria Thermometer The refrigerator may have a temperature pilot light. This is a light display indicating “OK” if the temperature is 4 ºC or lower. Temperature > 4ºC (greater than)
Temperature < 4ºC (less than)
OK Listeria Thermometer
● Bio Filter The refrigerator may have a filter to absorb strange food smells. It also traps the micro-organisms (bacteria and moulds) in the circulating air. The filter should be replaced when the indicator has completed the sequence (approximately 6 months). To start the sequence, press the central part of the display until you hear a light click.
Filter not expired
Filter expired
Bio Filter 3
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Description of operation 3.- Functional description 3.1.- General description The operating specifications are as follows: ● Refrigeration circuit
● NTC Sensors
● Functional components
● Control card
● Refrigeration circuit The cold system is No-Frost. The air flow generated inside the refrigerator is shown in Figures 3.1 and 3.2. If the damper is closed, the air can not flow into the refrigerator section.
Damper
Fan
Evaporator
Figure 3.2: Cross-section
Figure 3.1: Tank front 4
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Description of operation The refrigeration circuit diagram is as follows: Anti-condensation Condenser
Compressor
Filter
Capillary pipe
Evaporator
Figure 3.3: Anti-condensation Condenser
Load pipe
Element Anti-condensation Condenser Filter Capillary pipe
Impulsion pipe Return pipe
Diameter 5 mm 5 mm 5/2 mm 2 mm
Compressor Return pipe
ZBS1114CY 8 mm
HTK12AA 8 mm
Load pipe Impulsion pipe
8 mm 7 mm
8 mm 7 mm
Figures are approximate. 5
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Description of operation ● Functional components
The main operating components are as follows:
Description Damper
Compressor
Function
Specifications
Controls the entry of cold air Resistance: into the refrigerator section from Legs 1-3: 415Ω the freezer. It has two positions: Legs 2-4: 415Ω open or closed. Voltage: 12 VDC Power: 0.5 W
Compresses R600a
Type: DUO-23I NFT TCH Power: 129W (Cecomaf) Type: DUO-24I NFT TCH Power: 149W (Cecomaf)
Freezer fan
Resistance: 550 Ω ± 10% Voltage: 220 VAC *Temperature of the battery Power: 4 W sensor below -15°C or after the Speed: 2,500 rpm compressor has been running Fan Ø: 90 mm for 4 minutes. Activation:
* Turning the system on (if the battery sensor temperature ≥ 0ºC) Deactivation: * Refrigerator door open Evaporator element
Thermal fuses
Defrost evaporator Thermal Resistance: 348,2Ω ± 8% fuses Voltage: 220 VAC Protects the element from Power: 139 W defrosting Activation: Thermal fuse: * Turning the system on Opening temperature = 93 ºC (if the battery sensor temperature < 0ºC)
Water emptying element
Resistance: 1180,5Ω ± 8% Water emptying defrost Voltage: 220 VAC Activation: Power: 41 W * Turning the system on (if the battery sensor temperature < 0ºC)
Control card
Control
6
Voltage: 220 ± 10% VAC Frequency: 50 Hz
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Description of operation ● NTC Sensors
These models have three NTC sensors: one for each section and another for the freezer battery. Refrigerator and freezer section sensor: Temp. (ºC) R (KΩ)
-40
-30
-20
-10
0
10
20
30
40
50
18.85
10.82
6.43
3.94
2.49
1.61
1.07
0.73
0.5
0.35
Battery sensor: Temp. (ºC) R (KΩ)
-40
-35
-30
-25
-20
-15
-10
-5
0
10
20
88.57 64.16 46.92 34.66 25.86 19.47 14.79 11.33 8.7 5.34 3.35
Refrigerator Sensor
Freezer sensor
Battery sensor
Figure 3.4: Sensor location 7
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Description of operation ● Control card The appliance is controlled by an electronic card. There are two types of cards: with display, without display. The interface elements which make up the control panel are:
Electronic card without display:
ON/OFF
Super-Cooling
Holiday function
Super-Freezing Cold barrier broken LED alarm
VAC
Freezer LEDs
Potentiometers
Turning On/Off The section is turned on or off with the ON/OFF button. Setting the temperature Two potentiometers are used to set the temperature for each section, distributing the selected range uniformly throughout the section. Turning the knob anti-clockwise as far as possible sets the highest temperature. Possible temperature range: Refrigerator (ºC) Freezer (ºC)
+1
+2
+3
+4
+5
+6
+7
+8
+9
-18 -19 -20 -21 -22 -23 -24
If there is a power failure, when the power supply is returned to the fridge, the control guarantees the on/off status of the appliance. The duration of these power failures can be indefinite. The freezer thermometer is set by four LED pilot lights. Each pilot light indicates a temperature level. The distribution of the pilot lights with the temperature is as follows: > -14ºC... = -15ºC / -16ºC / -17ºC / -18ºC / -19ºC. = -20ºC / -21ºC / -22ºC. < -23ºC / -24ºC... 8
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Description of operation Electronic card with display:
Refrigerator control
Cold barrier broken LED alarm Refrigerator Display
Freezer control
Super-Cooling
Super-Freezing
Freezer display
Turning On/Off With this fridge, it is not possible to turn on and off each section separately. The fridge is turned on or off with the buttons to regulate the freezer, so that when the freezer is turned on or off, so is the refrigerator. To disconnect the fridge, take the settings of the freezer out of the range using the freezer push buttons (+ and - ). Freezer (ºC)
OFF -17 -18 -19 -20 -21 -22 -23 -24 OFF
When the freezer is connected, use the refrigerator push buttons (+ and -) to activate or deactivate the holiday function on the refrigerator section separately. To activate the holiday function, take the settings of the refrigerator section out of the range using the refrigerator push buttons. This is indicated on the display with H: Refrigerator (ºC)
H
+1
+2
+3
+4
+5
H
+6
+7
+8
+9
H
Holiday function activated
If there is a power failure, when the power supply is returned to the fridge, the control guarantees the on/off status of the appliance. The duration of these power failures can be indefinite. Setting the temperature The temperature setting can be selected or regulated using the + or – buttons for the corresponding compartment. The display will always show the temperature set. To display the actual temperature, press the + or – button for either of the compartments and hold down for 6 seconds. The current temperature in the compartment will flash continuously on the display for 5 seconds before returning to show the temperature set. It will flash every 0.5 seconds. ON and 0.5 sec. OFF. 9
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Description of operation Cold barrier broken alarm Affects the freezer section. This is activated when the freezer section sensor detects a temperature warmer than -14 ºC. (Temp > -14 ºC) Cold barrier broken LED alarm
VAC
This alarm comprises a red LED and a buzzer. When the alarm is tripped, the LED flashes and the buzzer sounds (0.5 s ON and 0.5 s OFF) This situation is maintained until the temperature drops below - 14°C (e.g. -15 ºC, -16 ºC ...). The activation sequence for the buzzer is as follows: - 5 minutes ON, 10 minutes OFF until the alarm condition disappears or the superfreezing button is pressed. If, during an alarm situation, with the red LED flashing and the buzzer sounding, the super freezing button is pressed, the buzzer will stop (not completing the cycle of 5 minutes on/10 minutes off) and the alarm LED will stay on and not flash. The situation will continue until the cold barrier has been corrected. If, before reaching the temperature of - 14°C, the super freezing function is deactivated, the alarm LED will remain on (not flashing) and the buzzer will NOT sound. If in the 12 hours after an alarm, the alarm has not been corrected, the alarm procedure shall begin from the beginning (flashing LED and buzzer).
Buzzer ON
Buzzer OFF
Time 0.5 sec 0.5 sec
10 minutes
5 minutes
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5 minutes
When starting up the appliance and until the cold barrier temperature has been reached, the alarm pilot light shall come on without flashing and the buzzer will not sound.
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Description of operation Start-up When the appliance is connected to the mains, it performs the following sequence: 1.- The damper performs an open/close cycle. 2.- The control measures the temperature of the battery sensor: 2.1.- If the battery sensor temperature < 0°C. It performs a defrost cycle. 2.2- If the battery sensor temperature ≥ 0ºC. The fan and the compressor are activated. The damper is set to freezer mode. All the airflow is transferred to the freezer section. When the ambient temperature sensor in the freezer section detects a temperature of 0°C, the damper opens to let the air flow into the refrigerator section. Start-up Damper open/close cycle Battery sensor temperature Battery sensor temperature < 0ºC Compressor: OFF Fan: OFF Defrost: ON
Battery sensor temperature ≥ 0ºC
Compressor: ON Fan: ON Damper: Freezer
Battery sensor temperature ≥ +18 ºC or Defrost ON 25 minutes Five minutes compressor OFF
Freezer sensor temperature ≤ 0ºC
Compressor: ON Fan: ON Damper: Refrigerator.
Compressor: ON Fan: OFF Defrost: OFF Battery sensor temperature ≤ -15 ºC or compressor ON 4 minutes.
Compressor: ON Fan: ON 11
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Description of operation Freezer priority When the temperature detected by the sensor in the freezer section is higher than -14 ºC (-13 ºC, -12 ºC...), the card sends a set of pulses to the damper (close). All the airflow is transferred to the freezer section even though the refrigerator section still requires cold. Freezer section temperature ≥ -14 ºC
Damper: Freezer
Defrost function This is a priority function regarding the control of the two sections. To begin with, the first defrost cycle is performed after the compressor has been operating for eight hours. The time for subsequent defrost cycles depends on the duration of the previous defrost cycles. The defrost element is deactivated when the battery sensor detects a temperature of +18°C. The compressor stops for five minutes before starting up. Defrost ON Battery sensor temperature ≥ +18 ºC or Defrost ON 25 minutes Five minutes compressor OFF Compressor: ON Defrost : OFF
Battery sensor temperature ≤ -15 ºC or compressor ON 4 minutes
Compressor: ON Fan: ON
Start/stop temperatures for the Refrigerator section: Temp. set TOFF
+1 +2 +3 +4 +5 +6 +1.5 +2.5 +3.5 +4.5 +5.5 +6.5
+7 +7.5
+8 +8.5
TON
+4.5 +5.5 +6.5 +7.5 +8.5 +9.5 +10.5 +11.5 +12.5
Start/stop temperatures for the freezer section: Temp. set TON
-17 -15
-18 -19 -15.75 -16.75
-20 -17.5
TOFF
-17
-17.75 -18.75 -19.25 -20.5 -21.25 -22 -23
Regulated temperature tolerance is +/- 1ºC. 12
-21 -22 -23 -24 -18.5 -19.25 -20 -21
+9 +9.5
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Description of operation 3.2.- Troubleshooting Depending on the alarm indicated, the following LEDs or error codes flash:
Control panel without display:
Refrigerator sensor fault (Flashing) VAC
Freezer sensor fault (Flashing) VAC
Refrigerator and freezer sensor fault (Flashing) VAC
Control panel with display:
nt1: Refrigerator sensor fault (flashing) nt2: Freezer sensor fault (flashing)
When the control detects the fault, the appliance continues to function regulated by times.
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Description of operation 3.3.- Assembly and disassembly instructions ● Changing the way the doors open With external top hinge: 1.- Disconnect the refrigerator from the mains and empty all the contents stored in the door. 2.- Remove the cover from the upper hinge. 3.- Undo the screws in the upper hinge. 4.- Lift the door up to take it off. 5.- Remove the cover from the central hinge screws, and undo the screws which hold it. 6.- Once the screws are undone, free the freezer door by lifting it upwards. 7.- Change the position of the pin in the lower hinge, and place it on the other side. 8.- If the fridge has side handles, move them to the opposite side. 9.- Fit the doors in the reverse order to that followed when dismantling them. Tools required: Phillips screwdriver. TORX screwdriver.
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Description of operation With hidden top hinge:
1.- Disconnect the refrigerator from the mains and empty all the contents stored in the door. 2.- Remove the base and its screws, and remove the lower hinge. 3.- Take the freezer door off. 4.- Remove the cover from the central hinge screws, and undo the screws which hold it. 5.- Take the refrigerator door off. 6.- Remove the pin from the upper hinge and mount it on the other side of the fridge. 7.- Change the position of the pin in the lower hinge, and place it on the other side. 8.- If the fridge has side handles, move them to the opposite side. 9.- Fit the doors in the reverse order to that followed when dismantling them. Tools required: Phillips screwdriver. TORX screwdriver.
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Description of operation ● Removing the freezer section To remove the evaporator, proceed as follows: 1.- Remove the four screws that hold the cover.
Once the cover has been removed, you have the following elements: Outlet conduit Fan
Thermal fuses
Evaporator Battery sensor
Evaporator element
Air intake conduit
Water emptying element
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Description of operation ● Removing the evaporator element 1.- The battery is held in position by two snap-fit supports.
2.- Turn the battery up.
3.- Remove the element, taking special care with the battery tabs. ● Removing the control panel Remove the control panel by pressing lightly on the groove at the top.
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Description of operation ● Removing the air distributor 1.- Remove the light cover. 2.- Remove the column lids. 3.- Remove the screws that hold the column in place.
4.- Remove the column. 5.- Access the damper.
Damper
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Description of operation ● Replaceable seal In these models, the refrigerator and freezer door seals may be replaced. Firstly take the door off its hinges, and then carry out the following steps. 1.- Cut the original seal with a cutter. 2.- Detach the seal and remove it from its housing. 3.- Once it has been removed, clean any possible dirt from the inside of the door. (Using a flat screwdriver) 1
3
2
4.- Make a cut in a corner of the lower lip of the new seal. Start to fit it from that corner of the door. 4
4
4
5.- Use a flat screwdriver to push the lower lip of the seal into the inner door housing. 6.- Apply spots of glue all around the edge of the inner door between it and the seal. 5
6
Tools required: - Cutter - Flat screwdriver 19
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Description of operation 3.4.- Drawings and diagrams Electronic card without display:
1 2 3 4
P
1 2 3 4 5 6 7 8
01
02
S1
03
03
01
03
05
03
I
Damper
02
L 04 03 02
S2
01
01
C1
01
L
01
03
07
N 03 08
06
S3 V1 R1 R
F1
08 02
A
02 00
03
03
A-Cable alimentación C1-Compresor refrigerador F1-PTC S1-Sensor refrigerador S2-Sensor congelador S3-Sensor desescarche congelador R-Resistencia R1-Resistencia I-Interruptor lampara P-Pulsador de luz L-Lámpara V1-Ventilador congelador
A-Feeding cable C1-Refrigerator compressor F1-PTC S1-Refrigerator sensor S2-Freezer sensor S3-Freezer Defrost sensor R-Resistance R1-Resistance I-Lamp switch P-Lamp pushbutton L-Lamp V-freezer Fan
A-Cable alimentation C1-Compresseur F1-PTC S1-Capteur refrigerateur S2-Capteur congelateur S3-Capteur degivrage congelateur R-Resistance R1-Resistance I-Interrupteur lampe P-Poussoir lampe L-Lampe V-Ventilateur congelateur
00-Negro 01-Blanco 02-Marrón 03-Azul 04-Rojo 05-Rosa 06-Naranja 07-Gris 08-Amarillo-verde 09-Lila 10-Granate
00-Black 01-White 02-Brown 03-Blue 04-Red 05-Pink 06-Orange 07-Grey 08-Yellow-green 09-Lille 10-Garnet
00-Noir 01-Blanc 02-Marron 03-Bleu 04-Rouge 05-Rose 06-Orange 07-Gris 08-Jaune-vert 09-Lila 10-Grenat
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Description of operation Electronic card with display:
1 2 3 4
P 01
02
S1
03
03
01
03
05
03
I
02
Damper
L 04 03
S2
01
01
C1
02
01
L
01 07
03
N 03 08
06
S3 V1 R1 R
F1
08 02
A
02 00
03
03
A-Cable alimentación C1-Compresor refrigerador F1-PTC S1-Sensor refrigerador S2-Sensor congelador S3-Sensor desescarche congelador R-Resistencia R1-Resistencia I-Interruptor lampara P-Pulsador de luz L-Lámpara V1-Ventilador congelador
A-Feeding cable C1-Refrigerator compressor F1-PTC S1-Refrigerator sensor S2-Freezer sensor S3-Freezer Defrost sensor R-Resistance R1-Resistance I-Lamp switch P-Lamp pushbutton L-Lamp V-freezer Fan
A-Cable alimentation C1-Compresseur F1-PTC S1-Capteur refrigerateur S2-Capteur congelateur S3-Capteur degivrage congelateur R-Resistance R1-Resistance I-Interrupteur lampe P-Poussoir lampe L-Lampe V-Ventilateur congelateur
00-Negro 01-Blanco 02-Marrón 03-Azul 04-Rojo 05-Rosa 06-Naranja 07-Gris 08-Amarillo-verde 09-Lila 10-Granate
00-Black 01-White 02-Brown 03-Blue 04-Red 05-Pink 06-Orange 07-Grey 08-Yellow-green 09-Lille 10-Garnet
00-Noir 01-Blanc 02-Marron 03-Bleu 04-Rouge 05-Rose 06-Orange 07-Gris 08-Jaune-vert 09-Lila 10-Grenat
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© FAGOR ELECTRODOMESTICOS, S.COOP. 2007 Bº San Andrés, s/n 20500 Mondragón (Gipuzkoa) España (Spain)
