Text preview for : Liebherr_3366_service_-_repair_manual.pdf part of Liebherr CNES 3366 Service manual for Leibherr 3366 / CNES3366 / cnes 3366 fridge freezer. May also be useful for other Leibherr models.
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After Sales Service International
Service Information
LHG/TKD-KH/22.09.04
Service Information no. 30/2004
Appliance documentation
CN(es) ...6
from Index 20 NoFrost combined refrigerator-freezer
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30200400SI
Service Information no. 30/2004
CN(es) ...6
1.0. Contents
2.0. 3.0. 4.0. Extract from Operating Instructions The functions at a glance Description of the appliance (in brief) 4.1. Schematic diagram: Refrigeration assembly 4.2. Schematic diagram: Freezer compartment 5.0. 6.0. 7.0. Refrigerator compartment controls and functional parts Freezer compartment controls and functional parts Cooling circuit 7.1. Refrigerator cooling circuit 7.2. Freezer cooling circuit 8.0. Special features 8.1. Electrical actuation of solenoid valve 8.2. Switch rules
8.2.1. 8.2.2. 8.2.3.
Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page
3 6 6 7 7 8 8 9 9 10 10 10 10 10 11 11 12 12 12 13 14 14 14 15 16 17 17 17 18 18 19 19 19 19
Compressor switch rules Freezer fan switch rules Solenoid valves switch rules
9.0.
Installation instructions 9.1. Defrost drain valve
9.2. 9.3.
Solenoid valve Access to evaporator and fan modules
9.4. Evaporator module 9.5. Fan 9.6. Reed switch 10.0. Technical data refrigerator compartment 11.0. Technical data freezer compartment 12.0. Service menu
12.1. Defrosting the freezer compartment 12.2. Demo mode 12.3. CS mode 12.4. Sensor test
13.0. Customer menu
13.1. Child-proof lock 13.2. Display brightness
14.0. Error code table
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2.0. Extract from Operating Instructions
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3.0. The functions at a glance
Control: Temperature display: Temperature alarm: Door alarm: Fan: Defrosting: Light:
(X = included, O = not included)
X O O X X X O X X X O X X O X X
Electronic Thermostat Analogue Digital Visual (freezer compartment only) Acoustic (freezer compartment only) Visual Acoustic (refrigerator and freezer compartments) Refrigerator compartment Freezer compartment Manual Automatic (refrigerator and freezer compartments) Refrigerator compartment Freezer compartment Automatic (+2°C for 6 hours) Automatic (quantity-controlled, 30 to 65 hours) Start by means of button combination Start by means of test plug 1 joint compressor Solenoid valve
SuperCooling: SuperFrost: Self-diagnosis routine:
X O Refrigeration technology: X X
4.0. Description of the appliance (in brief)
The CN ...6 is a combined refrigerator-freezer with a NoFrost freezer compartment. It has one compressor. The refrigerator and freezer evaporators are activated via a bistable solenoid valve. The two evaporators are switched in series (see sketch 4.1.). The refrigerator compartment can therefore only be operated in combination with the freezer compartment. However, it is possible to operate the freezer compartment on its own. Refrigerator compartment: The refrigerator compartment is equipped with a foamed-in evaporator, an air sensor and an evaporator sensor. Both sensors can be replaced separately. The air sensor detects the temperature for the temperature display and switches off the refrigeration function. The evaporator sensor registers the temperature for defrosting the refrigerator evaporator and switches the refrigeration function on. Freezer compartment: The freezer compartment is equipped with a NoFrost rear wall evaporator module, a fan module, an air sensor and an evaporator sensor. Both sensors can be replaced separately. The air sensor detects the temperature for the temperature display and switches the refrigeration function on and off. The evaporator sensor activates the freezer fan and the evaporator module defrost function. There is a special defrost drain valve for draining off the defrost water.
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Service Information no. 30/2004 4.1. Schematic diagram: Refrigeration assembly
CN(es) ...6
Condenser
RC evaporator
Solenoid valve Compressor
FC evaporator
4.2.
Schematic diagram: Freezer compartment
FC reed switch Freezer fan
FC evaporator
Compressor
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5.0. Refrigerator compartment controls and functional parts
Electronics: 6-series Magnetek electronics, operating panel board and power board. The microcontroller is on the power board. 2°C to 50°C +2°C to +11°C Sounds when refrigerator door has been left open for 60 seconds Inside right of refrigerator compartment Switches the compressor on and sets the solenoid valve to position A (refrigerator and freezer compartments are activated). · · · SuperCooling: Defrosting: Refrigerator fan: Sets the solenoid valve to position B (only the freezer compartment is activated). Switches the compressor off according to the values read at the freezer air sensor (logical AND operation). Detects the temperature to be displayed on the refrigerator display
Display range: Setting range (reference setting): Door alarm: Interior light: Refrigerator evaporator sensor: Refrigerator air sensor:
Cools appliance down to +2°C for 6 hours Takes place automatically when the compressor is idle At the top in the middle of the refrigerator rear wall. Can be switched on and off using the button on the operating panel. · · The fan runs when the compressor is running and the solenoid valve is set to position A (refrigerator and freezer compartments are activated). Switches off when door open (reed switch).
6.0. Freezer compartment controls and functional parts
Electronics: 6-series Magnetek electronics, operating panel board and power board. The microcontroller is on the power board. 0°C to -40°C -16°C to -26°C Alarm temperature is set at -8°C, regardless of reference setting. The alarm is triggered if temperatures of -8°C or warmer have been displayed for 20 minutes. The alarm function is suppressed for 90 minutes after the defrost heater has been switched on. When the appliance is switched on for the first time, the visual warning light comes on and the audible warning signal is switched off. Door alarm: Reed switch: Sounds when freezer door has been left open for 60 seconds Switches fan off when door is opened
Display range: Setting range (reference setting): Temperature alarm:
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Fan: The fan runs when the following conditions are met: - Compressor on - Freezer door closed - Evaporator sensor activation temperature reached.
CN(es) ...6
Freezer air sensor:
Evaporator sensor activation temperature: a} On starting up: -25°C b} In normal operation: 2K below freezer air sensor Switches the compressor on according to the values read at the refrigerator evaporator sensor. Switches the compressor off according to the values read at the refrigerator air sensor. Detects the temperature to be displayed on the freezer display. Ends the defrost phase and switches the freezer fan on.
-
Freezer evaporator sensor: Evaporator heater:
Heats both the evaporator and the defrost drain gulley Safety temperature limiter switched in series with the heater Activated via the electronic control system
Defrosting:
The defrost phase is activated: - When starting up after 6 hours of accumulated compressor running time. - After an accumulated compressor running time of 12 to a maximum of 60 hours, according to how often and how long the door is opened. When the defrost phase is started, the compressor and the fan are switched off and the defrost heater is switched on. The defrost heater remains on until: - The evaporator has reached +10°C or - 50 minutes have elapsed. The compressor is switched on after a delay of 10 minutes at the end of the heating phase. When activating the SuperFrost function during the defrost phase, the defrost phase will not be interrupted.
Defrost drain valve:
Foamed-in defrost drain valve; can be dismantled for cleaning. Important: valve must be replaced in exactly the right way (see section 9.1., "Installation instructions"). Cools the freezer compartment down to -32°C (quantity-controlled, 30 to 65 hours)
SuperFrost:
7.0. Cooling circuit
7.1. Refrigerator cooling circuit
Foamed-in evaporator. Evaporator sensor can be replaced separately. Solenoid valve set to position A (cooling + freezing): Refrigerant is injected at the top left of the refrigerator evaporator and then supplied to the freezer evaporator 1 joint standard compressor for refrigerator and freezer compartments 2 capillary tubes (long winding for refrigerator, short winding for freezer)
Evaporator: Injection point / flow sequence:
Compressor: Solenoid valve:
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Service Information no. 30/2004 7.2. Freezer cooling circuit
CN(es) ...6
Evaporator:
Ribbed evaporator fitted on the rear wall of the interior container in the freezer compartment. The defrost heater is fitted directly on the evaporator. Solenoid valve set to position B (freezing): Top left of ribbed evaporator Solenoid valve set to position A (cooling + freezing): Refrigerant is injected at the top left of the refrigerator evaporator and then supplied to the freezer evaporator
Injection point:
Solenoid valve: Compressor: Frame heater:
2 capillary tubes (long winding for refrigerator, short winding for freezer) 1 joint standard compressor for refrigerator and freezer compartments Foamed-in liquid heater for freezer door only
8.0. Special features
8.1. Electrical actuation of solenoid valve
The CN(es) ...6 appliances are equipped with bistable solenoid valves which maintain their switching state after actuation. They are therefore actuated with a short pulse. Switching state A or B also depends on the polarity of the actuation voltage (see sketch).
Negative half-wave switches solenoid valve to B
Positive half-wave switches solenoid valve to A
Result: It is not possible to check actuation with a voltmeter as the actuation pulses are so small. To check actuation of the solenoid valve, we recommend running the self-diagnosis routine. This makes the switching process of the solenoid valve clearly audible.
8.2.
8.2.1
Switch rules
Compressor switch rules Compressor ON: Freezer air sensor activation temperature or Refrigerator evaporator sensor activation temperature
NB: The reactivation delay of the electronic control system (8 minutes) must have elapsed.
Compressor OFF:
Freezer air sensor deactivation temperature and Refrigerator air sensor deactivation temperature
NB: As soon as the deactivation temperature is reached, a run-on time of 120 seconds is started. Page 10/19
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8.2.2
Freezer fan switch rules When the compressor is running and the door is closed
Fan ON:
NB: When starting up, the fan is switched on after a certain period of time.
Fan OFF:
When the compressor is off or Special case: The refrigerator air sensor is too warm and the freezer air sensor is at least 2K below its deactivation temperature. So there is more cooling capacity available for the refrigerator.
NB: The freezer reed switch switches the freezer fan off if the door is opened.
8.2.3
-
Solenoid valves switch rules
When the refrigerator air sensor deactivation temperature is reached, the solenoid valve is switched to B. The freezer compartment is activated.
B
A
-
When the refrigerator evaporator sensor activation temperature is reached, the solenoid valve is switched to A. The refrigerator and freezer compartments are activated.
B
A
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9.0.
9.1.
Installation instructions
Defrost drain valve
The defrost drain valve can be accessed through the compressor recess. It is situated directly above the evaporation tray of the compressor. To dismantle the valve, we recommend unscrewing and carefully removing the compressor.
Seal
Important: the rounded side of the seal must face upwards when installing!
9.2. Solenoid valve
Permanent magnets Important: Install correctly
The magnets must repel each other.
1 = Freezer 2 = Drier 3 = Refrigerator
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9.3.
Access to evaporator and fan modules
Remove drawers and glass shelves from the freezer compartment, Detach the air sensor, undo the Torx screws marked with the arrows in the illustration and remove the rear wall.
You can pull out the evaporator module towards you by lifting it slightly.
Remove the plastic screws at arrows 1 and 2. Then undo the Torx screws at arrows 3 and 4 and tilt out the fan module.
3
4
1
2
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9.4.
Evaporator module
The overheat guard illustrated at arrow 1 can be replaced separately with a retrofit kit. The retrofit kit consists of 2 crimped connectors and 2 heat-shrinkable sleeves. Important: Always attach the crimped connectors to the red and blue wires of the overheat guard. The defrost heater will be destroyed if you cut through the white wire.
1
9.5.
Fan
The fan is inserted in the plastic module with rubber buffers. The power cable has a removable connector.
9.6.
Reed switch
The reed switch is inserted in the fan module.
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10.0. Technical data refrigerator compartment
Light: 25 W 230 V Fan: 6W 230 V, 640 Ohm Sensor values: Refrigerator evaporator sensor Temperature [°C] +30 +25 +20 +5 0 -10 -18 -25 -30 Resistance [kOhm] 3.8 4.7 5.9 11.9 15.3 25.9 40.4 60.8 82.3
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11.0. Technical data freezer compartment
Fan: 4W 230 V 625 Ohm Aweco (bistable) 230 V (actuated by half-waves) 2.8 kOhm at +20°C Sensor values: Freezer air sensor Temperature [°C] +20 +5 0 -10 -18 -25 -30 Resistance [kOhm] 5.9 11.9 15.3 25.9 40.4 60.8 82.3
Solenoid valve:
Defrost heater:
CN 3366 and CN(es) 3866: - 125 W - 230 V -404 Ohm at +20°C - 0.55 A
CN 3666: -165 W - 230 V -309 Ohm at +20°C -0.72 A Overheat guard: - +93°C, switched in series with defrost heater - Cannot be reactivated; has to be replaced after tripping
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12.0. Service menu
The Service menu may only be used by a customer service engineer.
12.1.
· · · · · · ·
Defrosting the freezer compartment
"H" (evaporator must be cold)
Press freezer On/Off button and SuperFrost button simultaneously for 3 seconds. "H" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press the SuperFrost button. The appliance is now in Defrost mode. The defrost phase is activated. This is indicated by a flashing "A". The defrost phase ends as soon as the evaporator has reached +10°C or after 50 minutes. The appliance will switch back automatically to normal operating mode. The defrost phase can be ended sooner by pressing the On/Off button (for 1 second).
12.2.
· · · · · · · ·
Demo mode
"d1" or "d0"
Press freezer On/Off button and SuperFrost button simultaneously for 3 seconds. "H" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press "Up", "d1" or "d0" will flash. d1 = Demo mode is switched off. To switch on Demo mode, press the SuperFrost button. d0 = Demo mode is switched on. To switch off Demo mode, press the SuperFrost button. If you do not want to make any changes, press the On/Off button, not the SuperFrost button. When Demo mode is switched on, the compressors and fans are not activated. NB: Demo mode cannot be switched off by switching the mains power off and on. This is only possible by using the Service menu.
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12.3.
· · · · · · · · · · · ·
CS mode
"L"
Press freezer On/Off button and SuperFrost button simultaneously for 3 seconds. "H" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press "Up" twice until "L" flashes. Press the SuperFrost button. You are now in CS mode. "rd" will flash. "ru" is displayed if the ambient temperature sensor is faulty. Open and close both doors. All segments / LEDs will light up. Press all buttons. Every time you press a button it is acknowledged with a beep. The audible warning signal will sound for 2 seconds. The display will read "L0". All consumers can be activated individually using "Up" and "Down". L1: Compressor on, solenoid valve set to position B. L2: Compressor on, solenoid valve set to position A. L3: Freezer fan. L4: Freezer defrost heater. L5: Refrigerator light on. L7: Refrigerator fan on. · Stop by pressing On/Off.
12.4.
· · · · · · ·
Sensor test
"E" (temperature display) and door contact test
Press freezer On/Off button and SuperFrost button simultaneously for 3 seconds. "H" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press "Up" three times until "E" flashes. Press the SuperFrost button. The appliance is in Sensor test mode and is running in control mode. Display: "E1" alternates with refrigerator air sensor temperature. All sensor values and door contacts can be queried using "Up" and "Down". E1: Refrigerator air sensor E2: Refrigerator evaporator sensor E3: Freezer air sensor E4: Freezer evaporator sensor E8: Freezer door contact (0 = door closed, 1 = door open). E9: Refrigerator door contact (0 = door closed, 1 = door open). Stop by pressing On/Off twice.
·
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13.0. Customer menu
In the Customer menu, the customer can activate the child-proof lock and adjust the brightness of the temperature display.
13.1.
· · · · · · · ·
Child-proof lock
Press the SuperFrost button for 3 seconds, SuperFrost must flash. "c" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press the SuperFrost button. The display will read "c" and a flashing "0" (child-proof lock deactivated) or "1" (child-proof lock activated). The required function (c0 or c1) can be selected using "Up" and "Down". Confirm with the SuperFrost button. When the child-proof lock is activated, the "Child-proof lock" symbol lights up on the display. Press the On/Off button to switch back to normal operating mode.
13.2.
· · · · · · ·
Display brightness
Press the SuperFrost button for 3 seconds, SuperFrost must flash. "c" will flash in freezer display, the SuperCooling and SuperFrost buttons will flash. Press "Up", "h" will flash. Press the SuperFrost button. The display will read "h" and a number between 1 and 5 will flash (5 = max. brightness). Adjust to required brightness using "Up" and "Down". Confirm with the SuperFrost button and press the On/Off button to switch back to normal operating mode.
14.0. Error code table
Error code F1 F2 F3 F4 FA, FC, Fd, FP F6, F7, F8, F9, SE Defective component Refrigerator air sensor Refrigerator evaporator sensor NoFrost freezer air sensor NoFrost freezer evaporator sensor Reserved for factory testing. Reserved for factory testing. Emergency operation Compressor on for 10 minutes and off for 40 minutes. Compressor on for 10 minutes and off for 40 minutes. Freezer compressor runs continuously Freezer compressor runs continuously -
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