Haier HB21FNN Service Manual Download

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SERVICE MANUAL

Refrigerator

CAUTION

READ THIS MANUAL CAREFULLY TO
DIAGNOSE TROUBLE CORRECTLY
BEFORE OFFERING SERVICE

MODEL: HB21FN N

Features

1. Ice making

2.Slide-out shelf for easy food access

3.Pre-cooling for defrosting for freshness storage.

4.Intelligent operation for automatic operation.

5.Automatic problem detecting and warning system, door cooling warning system.

6. Vitamin C technology for fresh food storage

Summary of Contents for HB21FNN

Page 1: ...NG SERVICE MODEL HB21FN N Features 1 Ice making 2 Slide out shelf for easy food access 3 Pre cooling for defrosting for freshness storage 4 Intelligent operation for automatic operation 5 Automatic problem detecting and warning system door cooling warning system 6 Vitamin C technology for fresh food storage ...

Page 2: ...S 8 DISASSEMBLY AND INSTALLION 9 14 CONTROL AND DISPLAY SYSTEM 15 20 Control and display panel 15 Function adjustment and control principle 16 20 Error code display 21 REFRIGERATION PRINCIPLE 22 CIRCUIT DIAGRAM 23 24 Brief principle diagram 23 Connect diagram 24 TROUBLE SHOOTING 25 39 2 ...

Page 3: ...therwise fire hazard may arise ǃBe careful not to damage the power cord 1 Always pull at the plug other than the cord itself to disconnect the appliance from the outlet Route the power cord in a way to eliminate the risk of damage caused by the weight of refrigerator or treading 2 Be careful not to damage the power cord when moving the appliance away from the wall ǃWhen the power cord is damaged T...

Page 4: ...iance unless recommended by the manufacturer inside the refrigerator kǃChildren are not allowed to play with the door or the bottle racks Serious injury may occur lǃThe internal surface of freezer compartment is very cold when the appliance is running Do not touch the surface especially when hands are wet mǃThe gap between the doors and the gap between the doors and the cabinet are very small Make...

Page 5: ...he appliance can be plugged again only after an interval of at least 5 minutes to prevent damage to the compressor caused by frequent startups rǃPlease remove the door door seal and shelves before disposal of the old appliance and put them away in a safe place to prevent children from being entrapped 5 ...

Page 6: ...ual A automatic Fridge Freez A Defrost water outlet Yes Air circulating ventilator Yes Kind of coolant R134a R600a R134a Foaming components C P 3 Technical data Voltage frequency V Hz 220 240 V 50 Input power mains fuse minimum W A 180 Length of cable incl plug cm 350 Temperature range from to Fridge Freez C 22 7 4 Aesthetics Colours see L Top cover Cabinet Door Door Frame Fascia panel Handle Insi...

Page 7: ... lamps green yellow red Over temperature ALARM LED acoustic acoustic Adjustable thermostat Yes Fast freeze switch Yes Interior light W 25 Adjustable feet front rear n front Castors front rear rear 6 Product dimensions Unit dimensions H W D cm 77 91 177 Depth with open door cm Net weight kg 135 7 Packing dimensions loadability Packing dimensions H W D cm 76 98 186 Gross weight kg 148 8 Recycling sy...

Page 8: ...bin Vertical beam Cover of crisper Gallon bin Refrigerator compartment Vitamin C Drawer Icemaker Ice bin Ice spoon Freezer Partition wall of freezer drawer Freezer drawer Dairy bin Shelf Wine shelf Movable board Gallon bin Crisper Delicatessen drawer ...

Page 9: ...ge cover Unscrew the upper right hinge by means of hexagonal screwdriver and then remove the hinge Remove the middle hinge if necessary Replace the door in a reverse sequence of removal Removing and replacing the left door of refrigerator compartment Unscrew the upper left hinge cover by means of screwdriver and then remove the hinge cover Unscrew the upper left hinge by means of hexagonal screwdr...

Page 10: ... sides and pull out the bin in the direction shown on the slideway and remove it from the refrigerator Replace the ice bin in a reversal sequence to removal Removing Replacing Freezer Drawer Pull out the freezer drawer entirely and remove it from the refrigerator Release the buckles on both sides and pull out the drawer door in the direction shown on the slideway and remove it from the refrigerato...

Page 11: ...hands when removing or installing the bottom trim and adjustable legs of the refrigerator NOTE Installing front cover of delicatessen drawer Open the door of refrigerator compartment Take out the front cover of delicatessen drawer from the crisper cover Then place the rotary shaft at both ends of the drawer into the supporting slot of the slide guide and turn the front cover of delicatessen drawer...

Page 12: ...strated into the reserved holes by the other person NOTE Leg Reserved hole Removing Replacing Door Handle Take out the door handles from the refrigerator compartment 2 longer handles to be installed on the refrigerator and 1 shorter handle to be installed on the freezer The following instructions should be observed Removing Replacing Refrigerator Door Handle Get 2 fasteners out of the accessory ba...

Page 13: ...eftwards into its place To remove the handle push it rightwards Fastener Reinforcing plate Installing wine shelf Open the door of refrigerator compartment Take out the food shelf at the upper left corner Place the glass shelf downward on a table Then take out the wine shelf from the delicatessen drawer at the bottom Hold the wine shelf at both ends attach it to the food shelf as 1 shown below and ...

Page 14: ...he left hand holds the ice machine box the right hand holds the ice machine cover to drag hindward to pull up the ice machine outwardly together 3 pull out the cable of ice machine from the connect part such as the inclined arrowhead of figure second show the ice machine then is dismantle completely install Put the ice machine inside the liner withstand then push inside 14 ...

Page 15: ...emperature display B Freezer temperature control button I AI icon C Lock unlock button J Icemaker OFF icon D ice maker on off button K Fast freeze icon E Refrigerator temperature control button L Lock icon F Fast freeze button M Fast icemaking ON icon G Freezer temperature display 15 ...

Page 16: ...ure Under the Unlock mode the AI button A may be tapped to display the AI icon I and activate the AI mode To quit the AI mode tap the AI button A again The AI icon L will disappear 2 Fault Display When a fault with a control or function is detected the refrigerator temperature display and the freezer temperature display will disappear In this case please call the service center for information and...

Page 17: ...the Lock mode 4 Fast Freeze This function is intended for retaining nutrients contained in the food stored in the freezer by freezing the food fully within a short period of time Under the Unlock mode the Fast Freeze button F may be tapped to display the Fast Free icon K and activate the Fast Freeze mode To quit the Fast Freeze mode tap the Fast Freeze button F again The Fast Freeze icon K will di...

Page 18: ...ive a beep and the Fast Icemaking will be activated To quit the Fast Icemaking mode tap the Fast Freeze button F again The buzzer will give a beep and the Fast Icemaking icon M will disappear 7 Temperature Setting Regulation The default operation mode is AI To set a temperature manually the AI button A may be tapped to hide the AI icon I See the AI Mode section on Page 15 for details Temperature s...

Page 19: ...n Alarm When the door is kept open or not properly closed an audible alarm will be given once for a while until the door is closed 9 Economic Display Control Once the operation of control panel is finished the display screen will go dark after 30 seconds The display is restored when a control button is tapped or a door is opened However this button operation will not change the existing settings o...

Page 20: ...up Memory The temperature settings will be memorized and in case of a power interruption restored after the power interruption is over NOTE The backup memory is not applicable to settings under the Lock mode 20 ...

Page 21: ...n the top of freeze evaporator b the description of Break down and the display position and code Malfunction description display position Refrigerate sensor malfunction F1 temperature manifestation window of the door Ambient temperature sensor malfunction F3 temperature manifes tation windowof the door Freezer sensor malfunction F2 temperature manifestation windowof the door Frost sensor malfuncti...

Page 22: ... 1 Compressor 2 Dew Proof Pipe 3 Dry Filter 4 condenser 5 Dew Proof Pipe 6 Evaporator 7 Capillary tube SYSTEM FLOW CHART 22 System flow scenograph ...

Page 23: ...CIRCUIT DIAGRAM 1 Brief principle diagram 23 ...

Page 24: ...2 Connect diagram 24 CIRCUIT DIAGRAM ...

Page 25: ...reater after the compressor has just stopped running the refrigerant will flow for a certain time therefore this sound is a normal phenomenon 2 A click sound can often be heard from the refrigerator This is a normal sound produced by the pull in or release of the armature of a current deadweight start relay when starting the compressor The compressor motor will produce a slight and uniform sound w...

Page 26: ...s of refrigerators Three Essentials for Checkup 1 Look a Check the tubing of refrigerating system for cracks and various welding points for leaks if leakage occurs an oil stain can be seen definitely b Check the suction and exhaust pressure values high pressure and low pressure of compressor to see whether they are normal c Check the conditions of frost attached to its evaporator and gas return tu...

Page 27: ...s heat for only several minutes and then cools down this means that the filter and capillary have been clogged As for the forced air cooling condenser hot air will be blown out of it this means that the system is out of order c Feel the filter s temperature During the normal operation of refrigerating system the temperature on the filter s surface should be a little higher than the ambient tempera...

Page 28: ...potential leak points do exist in the system In troubleshooting pay attention to those parts that are liable to leak check main connection points for oil seepage and tubing for cracks If there is no severer leak point charge the system with nitrogen and detect leak points with the commonly adopted method repair them evacuate charge the system with refrigerant and then turn on the refrigerator to m...

Page 29: ...condition that the refrigerant in the system is unchanged This phenomenon occurs mostly when the compressor has been used for quite a long time its moving parts have worn to a considerable degree fit clearance between various parts have increased and sealing property of its gas valve has deteriorated resulting in an decrease in its actual gas discharge capacity Methods of Judgment Measure the high...

Page 30: ...ing it thoroughly recharge the system with refrigerant and seal the charging port B No Refrigerat ing The phenomenon that the compressor runs normally but no frost or only a little frost appears on the evaporator and the refrigerator temperature does not drop down is called no refrigerating There are many causes for this trouble and it is relatively complicated too In servicing special attention t...

Page 31: ...s heard and the gas suction pressure rises as well it can be confirmed that the trouble is caused by ice clogging Remedy If there is too much moisture in the refrigerating system it is advisable to release the refrigerant purge the tubing with nitrogen and then charge the system with the filtered refrigerant However the commonly adopted method is to connect a filter with moisture absorbers such as...

Page 32: ...imilar symptoms In repairing firstly hear attentively if there is some abnormal sound coming from the compressor sometimes the broken pieces of valve block may strike against the cylinder and feel the compressor casing with your hand to ascertain whether it is too hot this is also helpful to the troubleshooting secondly measure the pressures at the high and low pressure ports of the compressor wit...

Page 33: ...od not too long thus making the protective relay actuate and bring to a stoppage Remedy Check up how the air has been left in the refrigerating system Generally there are two possibilities one is that the air has been sucked into the system when repairing due to carelessness or it has not been purged out totally when evacuating the system the other is that there are leak points at the low pressure...

Page 34: ...s desired value the thermostat will shut down the compressor automatically Never take this normal operation as a trouble care should be taken to differentiate it from other real troubles in servicing D Compressor won t start In case the compressor cannot be started you must find out the origins of this trouble through checkup step by step because probably there are many causes including those elec...

Page 35: ... thermal relay sometimes may be open due to the leakage of temperature sensing agent from the temperature sensor Remedy Remove the relay cover to check up its contacts if they are open this means that the original setting is not properly set or temperature sensing agent has leaked out of the temperature sensor Try to turn the adjusting stem of this value in the direction of the lower temperature g...

Page 36: ...the old with a new one d Check the terminals for loose connection and electric circuits for other abnormal phenomena 5 Mechanical faults of compressor a Seizing of shaft This phenomenon is caused mostly by poor lubrication such as insufficient quantity of lubricant clogging in the lubricant oil line or intermittent lubricant oil supply Dirt and other impurities in the lubricant oil will increase i...

Page 37: ...e to the fact that the contacts of the thermostat cannot be released Remedy Dismantle the thermostat and make a through checkup if it is totally out of functioning replace it with a new one 3 evaporation temperature is too high in refrigerating system resulting in lower refrigerating capacity and hence continuous running of compressor Analysis of Trouble Leakage of refrigerant and clogging in a re...

Page 38: ... occurred in some electric devices or the erroneous wiring in installing power cord plug or outlet by the user This is very dangerous 3 Electric leakage test a Slightelectricleakage A tingle sense will be experienced as soon as you touch the metal parts of the refrigerator with your hand When you test them with a test pencil its neon lamp will come on In that case the first thing you need to do is...

Page 39: ...loosening of parts Improper and compact laying of tubes or the loosening of parts may cause vibration and noise 4 Large noise of the fan a The fan motor is loose b Noise is produced by normal operation of the fan c The impellers are not tightly fixed or eccentrically assembled Remedy For reason a Fasten the fan motor For reason b or c Replace the fan motor or impellers 5 Inspection method To find ...

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