Haier Freezer HCM050EC Service Manual
Contents
1. 33 5 Procedure and tools required for evacuation and Charging 38 6 Freezers NOISG iss 2 8 eleuntrecntedetadent seen er ae niaaa ai a 40 7 National Standard for noise 49 8 Measuring technology of freezer performance parameter 51 LES PA Exploded VieW scssi iia a a E a ae Taaa 58 14 Listo BUNS geese oes en a ed E 59 FREEZER Model HCMOS50EC Haie e A__ l So NN o PRODUCT CODE ILLUMINNATION AND SERIES INTRODUCTION Product Code Illumination and Series Introduction HCM HUY A BC D E F A The first letter of Haier B The first letter of Chest freezer C M stands for Mechanical thermostat control D Capacity Unit 10Cu Ft E Product Type L Lows E Economy Type H HIGH F Improve Series Number Examples HCMO50LC it represents Chest Freezer of Haier for Lows with capacity 5 0Cu Ft thermostat controlled by Mechanical FREEZER Model HCMOS50EC FEATURES Haier Features 3 1Feature of freezer Deep and quick freezing Square cabinet and square lid Mechanical temperature control with power indicator High pressure foam cover for efficient Temperature preservation Eximious water disposal device Wide climate zone design 3 2 Feature of deluxe domestic freezer series New streamline design Low power consumption 20 less than the other similar freezers Imported high quality compressor2. FREEZER Model HCM050EC Haier TvTvov4OH __ _ Sova HCMOSOEC Chest Freezer Service Manual HCMO050EC eFeatures Deep and quick freezing Square cabinet and square lid Mechanical temperature control with power indicator High pressure foam cover for efficient Temperature preservation Eximious water disposal device Wide climate zone design Haier Group Manual NO HCMO50EC 2006 7 31 Haier FREEZER Model HCMOSOEC CONTENTS Contents 1 CONEIS oisein cies nimecemesGaebeasies 1 2 Product Code Illumination and Series Introduction 2 3 Feat leS en 2 2 3 4 SDE CIICAUOINS 1st anincngotaceconiecudaulacisacnenwewanedtacaateawarieuseiadatentiaksees 4 5 Safety Precautions including Warning and Cautions 5 6 NeCDIMENSIQNLS 2 2 ed ln aa A ee 7 7 Installation and Accessory Parts cccccecee eee eee eee sees eeeeeeeeaeeaees 8 8 Parts and FUNCIONS 2 ae a ui 12 9 System Flow CAE nn es sens een aa sise die etes 13 10 Function SCN SANS ose czas soc nes es eds 14 11 Circuit Diagram A ad cn msi 15 12 Maintenance Service and Trouble Shooting 1 System TOUDIESNOOUNG i iisicieviinusdeeraydewstveiontdadedeasncedSenanendeewase 16 2 Common freezer problems 28 3 Service and technical requirements of R134a freezer 30 4 Application and maintenance of freezer
3. In semi sound eliminating room or in sound eliminating room without sound wave reflection 2 Put freezer onto 5 10mm elastic cushion 3 Freezer must be empty and running at least 30 minutes before measuring If normal stop happens please make the measurement 3 minutes after freezer starting again 4 4 measuring positions are required they are 1m away from freezer at front back front left front right respectively The height is 1 2 of freezer the instrument is accurate sound level meter A weighted 12 6 12 What s the different between national noise standard 52dB A and ministry of light industry standard 42dB Answer The noise of 52dB A in national standard is the sound power level Under the measuring conditions stipulated in national standard measure the freezer noise at four points take the average of indicated reading at greater noise situation calculate the arithmetic average value of the four points This value is the average sound pressure level of noise the calculation formula is L Lpa 2 1 OLgS where Ly sound power level dB Lpa average sound pressure level of measuring surface dB S the envelope area of measuring surface m 4 6 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting The standard 42dB of the ministry of light industry is the noise pressure level measured 1m away from freezer door This value plus 10 is the app
4. The measuring of temperature normally use platinum resistor There are two types Put the platinum resistor directly into test pack M pack when measuring a lts temperature 54 FREEZER Model HCMOS50EC Haier b Insert the platinum resistor into the center of four tin electroplated copper columns the diameter and height of column is the same 15 2mm The measuring equipment is temperature measuring bridge with the accuracy of 0 3K 6 Humidity measuring instrument the measurement of relative humidity is wet and dry bulb method Put the dry bulb thermometer and wet bulb thermometer enclose 1 5 2 layers of degreased gauze at the temperature sensing parts of thermometers and put the bottom end of gauze into distilled water under the blowing of wind with the speed of 2 5 3m s Record the temperature of dry bulb thermometer and calculate the relative humidity using the lt lt Relative humidity referring table for environment test gt gt GB6999 86 7 Cooling speed Leave the freezer at test room room temperature is 32 C the inner temperature of freezer gets balance with room temperature temperature difference 1K Close freezer door and let the freezer running continuously Record the time needed for storage temperature tm to reach tn max in accordance with table 13 3 cooling temperature tm to reach 14 C and the time the freezing temperature reaches the corresponding star level According to standard 250
5. and condenser large freezing capacity 1 5 times more then regular freezers Freezing quick and deep freeze functions are 2 times faster then regular freezers FREEZER Model HCMOS50EC SPECIFICATIONS Haier Specifications HCMO50EC Model Capacity Cubic Feet 5 0 Power Supply V Hz 115V 60Hz Power Consumption 219 KW h year Unit Dimension W D H 720 560 845 Unit Weight Kg 35 Box Dimensions W D H 775 595 890 Box Weight Kg 39 Container Quantity 40HC 180 FREEZER Model HCMOS50EC SAFETY PRECAUTIONS Safety Precautions Read all of the instructions before using this appliance When using this appliance always exercise basic safety precautions including the following 1 Use this appliance only for its intended purpose as described in this uses and care guide This freezer must be properly installed in accordance with the installation section Instructions before it is used See grounding instructions in the installation section Never unplug your freezer by puling on the power cord Always grasp the plug firmly and pull straight out from the outlet Repair or replace immediately all electric service cords that have become frayed or otherwise damaged Do not use a cord that shows cracks or abrasion damage along its length the plug or the connector end Unplug your freezer before cleaning or before making any repairs Note If
6. baseboard heaters cooking appliances etc Any floor unevenness should be corrected Installing Casters Your freezer can be equipped with casters for easy moving We recommend installing casters before using the freezer Install following these easy steps 1 Remove the food basket from the freezer 2 Slowly tilt the freezer on its side 3 Tap one caster into the bottom of the freezer Fasten the caster into place 1 0 FREEZER Model HCM050EC HaierTV vVT oC0_ __ _ vm with screws provided 4 Install the other three casters in the same manner 5 Return the freezer to its upright position and replace the food basket Note It is important to wait for 24 hours after installation before plugging in the unit to allow the refrigerant to stabilize Initial Setup Operating Your Freezer Once the freezer is in its proper place plug it in an electrical outlet having 115 volts Set the temperature on the temperature contrail knob being the warmest and II being the coldest Initially set the temperature on ll Place food inside the freezer green light will come on indicating that the freezer is in operation After using the freezer for 24 hours set the freezer to your desired setting In case you unplug your freezer or experience an electrical outage allow 5 Minutes before plugging it back in Note If the freezer has been placed in a horizontal or tilted position for any period of time wait 24 h
7. enough to support it fully loaded 3 When moving the freezer never tilt it more than a 45 degree angle This could damage the compressor and the sealed system 4 If the freezer is tilted let it stand in an upright position for at least 24 hours prior FREEZER Model HCMOS50EC Haier to plugging This is to allow the refrigerant to settle e Proper Air Circulation To assure your freezer works at the maximum efficiency it was designed for you should install it in a location where there is proper air circulation Plumbing and electrical connections The following are recommended clearances around the freezer Sides 2 50mm TOP nu 2 50mm Back 2 50mm Do not over fill freezer for proper internal air circulation Electrical Requirement Make sure there is a suitable power Outlet 115V with proper grounding to power the freezer Avoid the use of three plug adapters or cutting off the third grounding in order to accommodate a two plug outlet this is a dangerous practice since it provides no effective grounding for the freezer and may result in shock hazard Install Limitations Do not install your freezer in any location not properly insulated or heated e g garage etc your freezer was not designed to operate in temperature settings below 32 Fahrenheit Select a suitable location for the freezer on a hard even surfaces away from direct sunlight or heat source e g radiators
8. for any reason this product requires service we strongly recommend that a certified technician perform the service If your old freezer is not being used we recommend that you remove the door and leave the shelves in place this will reduce the possibility of danger to children 6 FREEZER Model HCMOS50EC Haier SAFETY PRECAUTIONS Safety Precautions 7 This freezer should not be recessed or built in an enclosed Cabinet It is designed for freestanding installation only 8 Do not operate your freezer in the presence of explosive fumes 9 Do not refreeze foods which have been thawed completely 10 Do not use any electrical device or any sharp instrument in defrosting your freezer FREEZER Model HCMO50EC NET DIMENSION Haier Net Dimension x FREEZER Model HCM050EC Haieg q q eq qjqqe_ew_ 4ecry 4 4Jom MM HCMO50EC Model Unit Dimension 720 560 845 W D H Dimension 720 560 1345 Door open INSTALLATION AND ACCESSORY PARTS Installation and Accessory Parts Unpacking Your Freezer 1 Remove all packaging material this includes the foam base and all adhesive tape holding the freezer accessories inside and outside 2 Inspect and remove any remains of packing tape or printed materials before powering on the freezer Adjusting Your Freezer 1 Your freezer is designed for freestanding installation only It should not be recessed or built in 2 Place the freezer on a floor strong
9. is too low The knob of temperature controller is set to off position 2 In side factors Electrical problem of freezer normally caused by connection terminals coming off or not in good contact Temperature controller out of order contact point are burned or switch element is damaged etc The start capacitor is bad 2 9 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting The starter relay or overload protector is bad A bad starter normally is caused by a burn a contact points or the welded point has come off a bad thermal protection unit is normally caused by burn contact points or a bad heating wire The motor winding are burned The compressor shaft is broken and blocking the cylinder 12 2 2 Operation of freezer is not normal Freezer starts when power is switched on but after a few seconds or 1 2 minutes it stops automatically and will start again in several minutes It stops again within a very short time period after starting If it runs like this Continuity and can not work normally there are several reasons for this matter 1 Big fluctuation of voltage The voltage required for proper operation is 115V olts If the voltage is too high the current flowing through the starter will increase accordingly When it exceeds the permissible value the starting contact point will keep in connection state for a long time and canno
10. stored in the freezer if hot food has been put in or not Too full of food is not good for cold air circulation Hot foodstuff can only be put in when it gets cool 4 Check if the freezer door has been closed well if the door seal bar is too dirty and the door cannot be sealed well Remove dirt and put on a little talcum powder 5 Frequent opening and extended opening of freezer door will reduce refrigeration ability 12 1 8 How to handle the seal bar for poor sealing If there is too much dirt and the sealing effect is not well please take a rag and dip in warm water and clean the seal bar After cleaned put on a little talcum powder If there is still seam you can put an electrical blower outside the seal bar and make it warm 24 FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting keep the temperature at 50 60 C press the bar to make it recover and press the bar around by hand so that it can recover If this is not effective take a piece of sponge with about 10mm wide 5mm thick a little longer than the seam and put it inside the seal bar i e the place between the bottom of seal bar and the door cushion This will make the seam place higher and adhere to freezer body the same as other places 12 1 9 Why freezer cannot be used at low temperature environment When environment temperature is be
11. thus keep the room temperature uniformly The temperature of test room is adjustable within the range of 10 43C 2 Temperature requirements for different climate freezers please refer to 53 FREEZER Model HCMOS50EC Haier table 6 1 Each test point shall keep the stipulated environment temperature the fluctuation range is 0 5K Within the range of 2m heights away from the test platform the vertical temperature gradient shall not exceed 2K m Table 6 1 Different climate sorts for freezers Climate types Symbols Suitable Measuring temperature C temperature C Sub temperate SN 10 32 25 zone N 16 32 25 Temperate zone ST 18 38 25 Sub tropical T 18 43 32 zone Tropical zone 3 Environmental humidity normally the relative humidity is 45 75 3 Test pack Use the rectangle packs of following dimensions as the load of freezer 4 Table 6 2 Test packs for freezer performance Dimensions mm Mass g Note Small 25 X 50 X 100 125 In the geometrical center of 500g Middle 50 X 100 X 100 500 pack there is a thermal element Big 50 X 100 X 200 1000 this pack is called M pack The contents of test packs are take 1000g pack as the datum hydroxyethimethylcellulose 230g water 764 2g sodium chloride 5g parachlorometacresol 0 8g The freezing point of filling of pack is 1 C its thermal property is similar to lean beef 5 Temperature measuring gauge
12. L below freezer will not exceed 2h 250L 500L freezers will not exceed 3h 8 Freezing ability 55 Haier FREEZER Model HCMO050EC The freezing ability of freezer shall not be less than 90 of rated ability 9 Electricity consumption Leave the freezer at test room climate temperatures are SN N and ST types 25C T type 32 C Test time is 24h The consumption of storage freezer and storage and freezing freezer shall be less than 115 of rated freezing freezer is less than 110 of rated Other tests to be done the measurement of temperature of storage 10 producing ability etc Table 6 3 Storage temperature of freezer Freezer and freezing freezer test of storage temperature ice Climate Climat Environme Storage Cabin type etype nt Cooling Freezing temp C t1 to ts tm max cabin cabin Sub temp 10 Complies 1 lt lt erate an 32 1e tagg f with Temperat 16 One star lt 6 lt lt lt lt Sub 18 three stars lt tropical 38 18 pr 0 lt titats lt 12 7 Tropical T 18 43 56 FREEZER Model HCM0S50EC Haie AAA_VOCTMVvVvV lV _ oir _ EXPLODED VIEW Exploded View Exploded View Edition 2006 01 03 Marketing model HCMO50EC USER MANAUL ENERGY GUIDE LABEL 57 Freezer Model HCM050EC No in exploded Spare parts Spare parts description in english Qty SPEC view number Hing
13. aited for starting again otherwise the compressor or refrigeration system will be damaged 5 Explosive flammable and volatile substance liquid filled glass containers alkalis or corrosive acids are not or be stored in freezer 6 Do not let children play in freezer compartment so as to avoid suffocation or damage to freezer 12 4 4 Maintenance Frost removal At the inner container there will be frost layer after using some time If the layer is too thick it will affect refrigeration and increase electricity consumption 1 At a regular period when the frost layer reaches about 5mm please remove it by plastic shovel 2 When removing frost switch power off take out stored food and place in a cool place In order to accelerate frost removing speed containers with warm water can be put into compartment 3 When frost buildup has melted pull out the drainage plug wipe freezer so water can drain out Compartment down with a dry cloth 4 Cleaning For safety reason please disconnect before cleaning so as to avoid electrical shock or damage to unit 5 When cleaning the freezer please use soft cloth or sponge and dip in 3 6 4 H a ie FREEZER Model HCM050EC water or soap water non corrosive neutral detergent is available After cleaning please make it dry by using cloth so as to avoid rust 6 Please clean the condenser compressor in the cabin and dust proof element by using soft brush regu
14. bad The reason is that the insulation around the motor windings bad 12 3 Service and technical requirements of a R134a freezer 12 3 1 Refrigeration equipment requirements The compressor condenser evaporator drying filter must be special for R134a freezer and not be confused 12 3 2 Repair equipment Requirements 1 The evacuation and fill machine is special only for R134a use 2 Other equipment such as pressure gauge has no special requirements but once it is used for R134a freezer it can be no longer for other use 3 1 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 3 3 Service procedure 1 Operation method of repairing equipment please see instruction manual 2 Special requirements The time interval from opening of compressor to the beginning of evacuation can not exceed 10 minutes The evacuation time shall not be less than 45 min In case there is leakage of freezer if leakage occurs at high pressure end it is repairable Please blow high purity N before welding If leakage occurs at low pressure end Check system pressure if the system has no pressure the freezer has to be scrapped and change with new one if there is pressure it is repairable 12 3 4 Changing procedure of R134a compressor 1 Switch power off Open the protection cover by using cross screwdriver or universal 2 Screwdriver 3 Remove el
15. cal plug in the electrical outlet e Rest the temperature control to the desired setting 1 2 FREEZER Model HCM050EC PARTS AND FUNCTIONS Haier Parts and Functions _ i MLL 1 Interior Drain Plug see insert 3 Power On Indicator green switch 2 Temperature Comro Adjusment 4 Exterior Drain Plug 1 3 FREEZER Model HCMOS50EC SYSTEM FLOW CHART Haier System Flow Chart The refrigeration system of direct cooling single system freezers belongs to the category of a single temperature and single control refrigerating system with only one evaporator and is controlled by a single temperature control 1 4 FREEZER Model HCMOS50EC FUNCTION SCHEDULE Haier Function Schedule Set the temperature on the temperature contrail knob l being the warmest and II being the coldest Initially set the temperature on ll Place food inside the freezer green light will come on indicating that the freezer is in operation After using the freezer for 24 hours set the freezer to your desired setting In case you unplug your freezer or experience an electrical outage allow 5 minutes before plugging it back in Note If the freezer has been placed in a horizontal or tilted position for any period of time wait 24 hours before plugging the unit in Adjustable temperature dial Your freezer will automatically maintain the temperature level you select The temperature level
16. ce man could not maitmains The spare parts may be air freighted by the factory if they were damaged The customer nees not stock in the spare part warehouse should be marked with 5 Above should be improved accord with the reply of the market half a year per time Sincere Forever Haier Group Tel 86 532 8938356 Web site http www haier com
17. controller t arder 2 Damage of cam of contacting point The probe of temperature sensing tube doesn t contact evaporator well It has not been mounted to position or changed during transportation 12 1 12 Procedure for fan change Mount it again 1 Switch off power and open the fan protection cover 2 Remove the fan bolts by using fork wrench or universal tool 3 Loose the fan blade and take it out 4 Take the fan out from the space between compressor and tubes 28 H a i e f FREEZER Model HCM050EC 5 Mount new fan from the space between the compressor and tubes put blade onto position and secure it by using a fork wrench or universal tool 6 Make a test run check if the operation is normal if there is any blocking of blade 7 Make sure not to bend or damage tubing during removal and installation 12 1 13 Procedure for temperature controller change 1 Switch off power 2 Remove side protection cover 3 Unscrew fastening nut 4 Hold the base end of temperature sensing tube and the controller pull out downward 5 Change with new temperature controller 12 2 Common freezer problems 12 2 1 Freezer cannot be started When switching on power the freezer cannot be started Determine first that the failure is caused by inside or outside factors The factors may be 1 Outside factors The fuse is burned or the contact of plug and socket is not well or the voltage
18. dy stable 3 When compressor runs friction 3 Move the tube a little away to between tubes and freezer body causes Len Too much avoid friction resonance else When 4 Compressor fixing screw is loose i nee D 4 Make th rew tight ne 5 The vibration absorption cushion for A tt st compressor fixing is too tight or too 5 Adjust the degree of tight or loose or ageing n es a saa loose of vibration absorption 6 Compressor inside noise is too big or ae cushion or change cushion vibration absorption suspending spring l 6 Change compressor is broken 1 There is serious leakage of 1 Check leakage make welding There is no l f mostai refrigerant repair and fill refrigerant again 2 There is dirt blocked the capillary or 2 Clean the capillary or change evaporator system filter Frost al 1 There is some leakage of refrigerant 1 Check leakage make welding evaporator is not full 2 There is dirt block but not serious 3 Refrigeration quantity of compressor is reduced repair and fill refrigerant again 2Clean the capillary and filter 3 Change compressor Evaporator frosts too rapid frost 1 Food put into freezer contains water 2 Too much food has been stored 1 Please let or make food dry after cleaning then store it 2 Store only corrects quantity of 217 or frozen to ice layer too thick food Electricity leakage of freezer body you wil
19. e left 0070803613 Hinge right 6 0077010059 Screw HCMOSOEC 4 ST3 5 13 F 8 0070200676 _ Drain stopper CT HCMOSOEC 1 ABS white 9 0076080026 Brand CT HCMOSOEC 1 0070601303 0070104653 23 0074180003 Filterdrier HCMOSOEC 1 24 0079020006 _ Hotshortentube HCMOSOEC 1 30 0075020010 Fixing screw HCMOSOEC 4 me 33 0074090827 Compressor sleeve HCMOSOEC 4 Steel 34 0074090828 Rubber spacer CT HCMOSOEC 4 NR 36 0074090829 Over load over heat protector HCMO50EC 1 4TM314NFBYY ar oorosoe32 presero fromonec 1 eau 38 0075160007 Grounding wire HCMO50EC 1 39 0077010062 Screw ____ HCMO50EC 1 ST3 5 95 40 0070401673 Capacity comp wire HCMO50EC 1 1 The failer rate and the proportion of the spare part stock are regarded as the reference of the stock for spare parts The first time should be stocked accroded with the proportion of the spare parts and it should be adjusted with the actual quantity 3 months later 2 easy damaged The spare part which is often damaged and the customer must stock in the spare parts warehouse and should be marked with 3 possible damaged The spare part which is not often damaged like the easy damaged one and the customer may stock in the sp re part warehouse accord with the actual case should be marked with 4 not need provided The spare part which is seldom damaged or the maintenan
20. e is sound a little now and then there must be leakage of system refrigerant or insufficient charge 2 0 FREEZER Model HCM050EC Haier 7vT7TV73 gt _ ef MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 2 After switching on power Listen to the running sound of the compressor whether it is normal or not Whether or not hear normal running sounds If there is heavy buzz that means the motor has not been started normally If there is bump sound this means that the suspended spring in the compressor is broken and the compressor is running in tilt When these matters occur please change compressor 12 1 5 troubleshooting by touch 1 Touch the cover of condenser after continuous operation the upper part of the cover is the warmest the temperature of lower part is similar to room temperature Its temperature is relative to environment temperature The temperature in winter is low and the condenser s temperature is low too and there is only a small part warm In summer the temperature is high and the temperature of condenser cover is high too and the whole condenser is warm 2 The temperature of high pressure exhaust pipe is high when touching with your hand in summer it is hot in winter it is also hot The temperature of low pressure gas inlet pipe is low In summer there is dew at the pipe wall and it will feel cool when touching when t
21. e metal parts using AC power of load empty voltage not over 12V 52 FREEZER Model HCM050EC Hailie kor and 10A current Calculate the resistance according to the current and voltage drop Ground connection resistance shall not exceed 0 1 ohm 12 8 2 5 Leakage of current When testing give 1 06 times rated voltage to the freezer and make the test at operation status The test complies with GB4706 1 84 the leakage current testing instrument is made in accordance with the stipulations The leakage current measured shall not exceed 1 5mA 12 8 2 6 Noise test This test is carried out at semi sound eliminating room The freezer is put to the geometrical center of room on a 5 10mm thick elastic cushion The freezer should be empty when testing Turn the knob of temperature controller to middle or near to strong position and close the door Test after the freezer has running more than 30 minutes The freezer noise power level 250L and below lt 52dB A 250L above lt 55dB A 12 8 2 7 Test method of refrigeration performance 1 4 or 6 freezers can be tested simultaneously at the test room The material of enclosure structure of test room is made up of 10mm thick polyurethane or polystyrene which has good insulation There are air re treatment motor sets in the test room Air comes into the room from the ceiling of porous plate with uniform pressure so as to assure airflow speed in the room not over 0 25m s and
22. ectrical parts of compressor 32 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 4 Remove the four mounting bolts of compressor by using fork wrench or universal tool 5 Remove the compressor 6 Install new compressor and new filter dryer and weld them The open time of system shall not be more than 10 min 7 Connect the R134a recovery unit to the low sideline of the compressor and then evacuate The evacuation time shall not be less than 45 min 8 Fill system with R134a according to its original quantity 9 Check if there is any leakage at welded point by using soapsuds 10 Use clean gauze to wipe away welding powder and flux 11 Connect the electrical controlling unit of compressor 12 Mount and adjust temperature controller 13 Switch on power for test run check unit operation 12 3 5 Compressor installation and brazing procedures 1 Install new compressor 2 Compressor is not allowed to suck in air directly for check or other test 3 When changing with new compressor during service the seal plug shall be opened last and make the brazing and evacuation immediately 4 When seal plug of compressor is removed if there is no gas flowing 3 3 FREEZER Model HCM050EC Haie lt e sound no pressure the compressor shall not be used 5 Compressor has no seal plug it cannot be used 6 There should be no grease adhe
23. ent should be made in time If it cannot reach the requirement of stabilizing there must be quality problem with it please don t use in case the voltage output is low For the previous reasons freezer makes sound at starting and stopping 12 6 15 Why sometimes noise at far distance is greater than at near distance Answer Because the transfer of freezer noise has relations with freezer position room space etc The sound wave giving out at freezer operation will reflect when it touches wall or furniture So it is possible that at a far distance it is noisier than near distance So it is not correct to make decision of big sound just by it can be heard meters away 4 8 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 6 16 How to determine that the sound is noise or normal Answer Normally speaking freezer noise within the range of national standard is normal But if there is continuous sound of metal contacting from compressor please check and solve the problem in time 12 7 National standard for noise There are stipulations in Items 6 5 7 1 and 6 3 6 1 of GB T 8059 3 1995 12 7 1 When freezer is running for freezing there will be no obvious noise The noise of sound power level of freezer with the volume 250L and below measuring according to the stipulations in item 6 3 6 1 will not greater than 52dB A Sound power level noise of fre
24. ezing freezer with fan 300L below lt 55dB A 300 400L including 400L lt 60dB A 401 500L including 500L lt 63dB A 49 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 7 2 Noise test At the geometrical center of measuring field put the freezing freezer onto an elastic base 5 6mm thick elastic rubber cushion The freezer should be empty Turn the knob of temperature controller to middle or near to strong position and close the door or cover Make the measurement at least 30 min after freezer operation During test if the freezer reaches the temperature the knob stipulated and the freezer stops the measurement must be interrupted and resume 3min after the freezer starts again The test environment is semi sound eliminating room Other test field must comply with the stipulations in GB4214 The test of noise is carried out as shown in figure 8 Put sound transfer units to measurement point 1 2 3 4 measure the sound level by sound level meter A weighted Take the greater readings and calculate the average value The arithmetic average value of these four points is taken as the average sound pressure level noise According to the testing result sound power level of the freezer being measured can be calculated out Lw Lpa 2 10LgS Where Lw A sound power level dB datum value is 1PW Lpa average sound pressure level of measuring surface dB da
25. h polymer The terminals and insulation material must have the same linear expansion coefficient the for requirement between terminals and the shell is more than 0 5 million ohm The reason of terminal leakage is that soda glass is broken or there are conductive materials such as water dirt etc adhered to terminals FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting If electricity leakage occurs outside the compressor please use tetra chloromethane or alcohol to clean it If the leakage occurs in the inner of compressor it needs to be changed 3 Leakage of temperature controller because of too long a period of service or too high temperature or too much dirt or too high humidity there may be electricity leakage If it has been defined that there is leakage of temperature controller please change 4 Leakage of starting relay during mounting and repairing screw of relay lead is easy to contact the shell and leakage will then occur If you suspect the relay is bad check it If there is leakage please make the connections again and leave a piece of insulation paper under the screw 5 Leakage of fan because of too high humidity of freezer environment or a bad fan controlling unit the fan is burned after long time operation and thus causes leakage Using voltammeter to measure the insulation res
26. he followings 22 total effective volume 23 ice producing ability 24 frost melting performance 25 heat insulation performance and anti dew 26 gas tightness of door seal 27 duration of door bar and handle 28 strength of supporting bracket and similar parts 29 internal freezer material and smell 30 firmness of freezer and transportation test 12 8 2 Test method and instrument 12 8 2 1 Sealing performance test of refrigeration system In this test freezer is put to positive pressure room temperature is 16 32 C Leakage inspection instrument is set to 0 5g of yearly leakage check every position of refrigeration system Leakage at any point shall not greater than 0 5g Leakage inspection instrument normally used includes H 25 of American GE product and Halogen instrument HLD4000 made by a German company 12 8 2 2 Insulation resistor This test is to check the insulation performance of freezer The resistance is measured with a voltage of 500V DC added to live parts and accessible metal parts The resistance must be not less than 2 million ohm 12 8 2 3 Electrical intensity This test is to check the electrical intensity of live parts and all accessible metal parts The testing equipment is flashover and breakdown unit voltage is 1650V 50Hz for 2s At the test there will not flashover and breakdown occurring 12 8 2 4 Ground resistor Check the voltage drop between freezer ground connection point and accessibl
27. he inside and outside of freezer clean If freezer will be off for a long time wipe water away and put the freezer into a plastic bag and leave it at a dry warehouse with good air convection and a level floor 12 5 12 5 1 Freezer repair tool and equipment 1 Recovery machine 2 N2 container O container acetylene container and torch kit 3 Thermometer 4 Voltmeter 5 Test pencil 6 Manifold gauges 7 Flathead screw driver 8 Philip screwdriver 9 Needle nose pliers notch pliers sealing pliers 10 Hansen valve 11 Tube cutters 12 5 2 Notice for use R134a filling equipment can only be used specially for R134a refrigerant 3 8 FREEZER Model HCMOS0EC Haie lt lt _ MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 1 It is not allowed to fill R134a by R12 filling equipment 2 Please keep the pliers pipe cutting unit and Hansen valve clean and keep them away from grease dirt 12 5 3 Procedure for filling equipment 1 Preparation before use Visually inspect recovery machine for abnormalities etc Keep all valves closed to equipment until really to proceed 2 Evacuation Connect recovery machine hoses to system fittings Switch on power Switch on motor Open all related valves Observe the pointer of vacuum meter when it is accessing the mark 1 Evacuation time shall not be less than 45 min After evac
28. is put in too early it may get damaged as the temperature is still high 6 Do not over pack refrigerator 7 Place food by reasonable sorts try to power open door frequency and time so as to reduce the loss of refrigeration and reduce consumption 8 There are four wheels at the bottom of freezer but it can only be used for short distance and on level road movement If it is required to move frequently please put the freezer onto a strong trolley base 9 As this type freezer is often used outdoors please make sure that the plug is firm so that unnecessary loss caused by infirm plug can be avoided 10 Cold drinks and snacks which contain much milk and needs to be stored at low temperature please try to put them at lower part of freezer 11 When the freezer is used outdoors please keep unit away from direct sun light Frequently clean the inside and outside of freezer especially the cabin part including condenser compressor etc 12 4 3 Safety notice of product 1 The freezer needs to be on a separate ground circuit with a 5A minimum carrying capacity 3 D 3 H a i e FREEZER Model HCM050EC 2 If the electrical cable needs to be extended the cross section of extending wire should not be less than 1 5mm 3 There must be reliable ground connection for the freezer ground line is not allowed to connect to water pipe gas pipe etc 4 Once the freezer is cut off at least 5 minute must be w
29. istance between each respective connection terminal and the freezer body if the resistance is too little means there is leakage caused by humidity if the resistance Is zero means the fan coil is burned or short circuited Please change the fan FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 1 3 Troubleshooting observation 1 At normal operation conditions the temperature around the surface of freezer evaporator is nearly the same the thickness of frost layer is similar If there is no frost at the surface of evaporator bed type freezer at all of its inner wall or only a small part at the upper conclusion can be made that the operation of refrigeration system is not normal the refrigerant is insufficient or there is leakage 2 Check the system tubing and make sure there is no leakage especially at the joint connections Refrigerant has good permeability and it also contains a little refrigerant oil If there is leak there will be traces of oil at the leak points 12 1 4 Troubleshooting by sounds 1 When the freezer is working normal high pressure liquid refrigerant flows into the low pressure evaporator via acapillarytube a gas flowing sound and water flowing sound can be heard Open the freezer door and access to the evaporator you can hear the sound If there is no sound or ther
30. l feel tingle when touching by hand 1 Freezer body has not been connected to the ground 2 The compressor terminal contacts body shell and causes short circuit 3 When the components of electrical system get wet insulation ability is dropped electricity leaks 1 Make the ground connection as stipulated 2 Change compressor 3 Check carefully step by step if insulation is seriously damaged please change remove wet parts and put them into drying box to make them dry Electricity leakage of fan 1 Environment temperature too high or insulation ability of insulator is dropped 2 There is short circuit between fan coils or the fan coil is burned 1 Change fan 2 Change fan Fan too noisy 1 The blade of fan is blocked or fan supporter is loose 2 The clearance of fan axle is too big 1 Clear obstacles around the fan or tighten the supporter 2 Change the fan 1 Change the fan spring etc The fan 1 Check if any connection has come off doesn t run 2 Check is the fan is burned 2 Change the fan Electricity 1 The service time is too long 1 Change temperature controller leakage of 2 Use brush to remove dust temperature 2 The environment is too dirty 3 Make the temperature dry and controller 3 Humidity is too high control the environment humidity 1 There is leakage of temperature Temperature F sensing medium controller out _ Change temperature
31. l slice will open and close about 47 times per second this will cause vibration sound At the same time the open and close of steel slice will contacts other parts and also make sound The continuous buzz we heard is this kind of sound 2 When compressor is produced there must be clearance between components When freezer is running the existing of clearance will make some components touch and gives out sound Especially at starting and stopping the forces acted on compressor components changes greatly and bigger sound will be generated 3 Noise of flowing liquid The running process of compressor is a continuous gas in and out process If the pressure of refrigerant gas breathed in or exhausted out changes suddenly vibration sound will be generated FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 4 Resonance sound of compressor components Compressor parts such as compressor body exhaust tube noise eliminator in compressor supporting spring etc will cause resonance sometimes and give out sound 5 Collision between body and shell Compressor body is suspended by three pieces of spring or supported by spring in the shell At starting or stopping forces acted on compressor changes greatly and sometimes make the body contact its shell and makes sound This situation is of shore duration 6 The electromagnetic sound a hermetically sealed mot
32. l solution depends on new improvements and developments in technology 4 4 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 6 9 why freezer noise changes greater at night Answer This is because the affection of freezer noise to people is relative to the level of environmental sound In noisy city or shops people feel the noise is little while in countryside or quiet living room will feel the same noise greater This is the reason that people feel the freezer gets noisier at home than at shop 12 6 10 What are the national stipulations for freezer noise Answer Regarding the side effect of noise to people s health and the technological level freezer industry can reach at present standardized stipulations for freezer noise is made in national standard GB8059 1 87 family use freezer with the volume below 250L noise lt 52 dB A sound power level The noise at offices we stay everyday or other public places is much higher than this freezer noise 12 6 11 Why freezer noise measured at home is incorrect Answer Because at home there is not the environment conditions for freezer noise measuring and the value measured is not effective The conditions for noise measuring are stipulated in national standard as the followings 4 5 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 1
33. larly so as to keep good refrigeration effect Dust proof element 2 3 days 7 Down time If the freezer has extended down time please disconnect power supply and wipe unit clean according to the above mentioned methods Open the door till it is dry and then seal for storage 12 4 5 Standard procedure of maintenance 1 Cleaning unit cabinet Take a cross screwdriver remove the cabinet board and rear protection cover Take a brush and wipe away dust from condenser fan compressor and temperature controller Wipe clean and avoid damaging pipes and electrical parts 2 Switch on power and check the freezer operation If not normal check and repair 3 Check all brazing connections If the black paint has peeled off and there is rust please grind the surface slightly using No 0 grinding paper When the rust is removed wipe it with clean towel Then take a brush and dip in alcoholic paint and paint the welded points and pipes 4 Check the casters and change if there is any damage 5 Check the power cord if there is any wear or damage please change 6 Take an avometer and check if the resistance of ground resistor is normal 7 Check the insulation by using if it is abnormal please check the circuit and various components 8 If the trademark is damaged or lost please change with new Haier of FREEZER Model HCM050EC Haier _ ro Y _ Ts T w _ trademark 9 Wipe t
34. low zero the lubrication ability of freezing oil in freezer compressor will decrease the compressor will be difficult to start or cannot be started or Compressor damage may occur 12 1 10 How to know there is problem with compressor motor It is easy to find out motor problem by checking the resistance of coil The method is to connect the terminals of common and run using ohm meter the coil resistance can then be determined Using terminals common and start can measure the resistance of starting coil If the value is infinite the coil must be open If the resistance is much less than the value the motor has there must be short circuit problem inside the motor or the windings are burned 2 5 Haier FREEZER Model HCM050EC MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 1 11 Freezer problem analysis and service Problems Reasons Removing methods 1 Fuse is broken 1 Check if there is short circuit and 2 The contact of plug socket and cable solve it if not change capable fuse is not good Cable broken 2 Check and connect tightly or 3 The voltage is too low 10 15 less change than rated voltage 3 Use till voltage rises to rated value 4 The knob of temperature controller is at or attach a stabilizer rest position 4 Rotate the knob to wanted Compressor 5 The temperature controller is out of position for suitable temperatu
35. or is relatively small 12 6 3 How is the sound of water flowing generated Answer When liquid refrigerant is flowing especially through the evaporator there will sound like water flowing This sound is different for the evaporator used and assembly technologies during producing are different If there is not this sound at freezer operation and evaporator cannot make refrigeration condenser is not hot this means there is restriction or there is a refrigerant leak 4 2 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 6 4 Gas flowing sound At operation of compressor it breathes in and exhausts out gas continuously When liquid refrigerant flows through capillary there will be gas jet and makes sound of gas flowing This is normal sound and may be different for various freezers as compressors and evaporators used are different 12 6 5 Why there is sudden cluck sound or pattering sound from freezer Answer This is the sound of expanding with heat and contracting with cold of condenser and evaporator or the sound of ice at evaporator surface because of sudden heat or cold This sound may occur at the following situations 1 Newly bought freezer the internal stress of materials has not been eliminated With time going on the stress of materials will disappear and it is less possible to make this sound 2 Temperature in the freeze
36. ouching in winter it will feel cooler FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 3 The cover temperature of The evaporator can be as low as 30 Cit will feel sticky when touching If you d like to touch please move your hand over it quickly otherwise your hand will be stuck 4 At normal operation of freezer the temperature of filter dryer cover is similar to room temperature only a little warmer If the cover temperature is much higher or lower than that of environment and there is frost there must be problem with the refrigeration system Touching the above mentioned parts if there is big temperature difference compared with normal there must be problem and further decision should be made 12 1 6 System noise repair Normally there are two kinds of freezer noise one is the natural noise of compressor and fan and the other is the resonance noise or structural noise The natural noise of compressor and fan is controlled within a standard range if the range is exceeded the compressor or fan needs to be repaired or changed The resonance or structural noise can be handled as follows 2 2 FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 1 If the free
37. ours before plugging the unit in Adjustable temperature dial Your freezer will automatically maintain the temperature level you select The temperature level you select The temperature control dial has 3 settings plus OFF l is the warmest Ill is the coldest Turning the dial to OFF stops cooling the 1 1 FREEZER Model HCMOS50EC Haier freezer Set the dial to Iland allow 24 hours to pass before adjusting the temperature to your needs Food Storage Basket Your Freezer has 1 or 2 removable basket It allows you to store food more accessibly or you can remove it if not needed Defrosting and Draining The Freezer e Defrost whenever the frost becomes 1 4 thick Never use a sharp or metallic instrument to remove the frost as it may damage the cooling coils A punctured coil will void the warranty e Turn the temperature control to OFF position and unplug the unit For draining place a tray beneath the outer drain plug Pull out the drain dial and rotate it so that the arrow points down ward This will let the water flow out into the tray e Remove the drain plug from the inside of the freezer Defrosting usually takes a few hours To defrost faster keep the freezer door open When done push the drain dial in and turn the arrow to the up position Re plug the drain plug inside the freezer compartment Note monitor the container under the drain to avoid overflow e Wipe the interior of the freezer and replace the electri
38. r is not uniform just after frost melting 3 When open door and take out food the evaporator feels hot suddenly 4 Temperature changes greatly of condenser and evaporator several minutes after starting or stopping of freezer Expand with heat and contract with cold is natural law and this sound is normal 4 3 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 6 6 Why the freezer s noise increases after using sometime Answer After half a year or one year s use clearance will increase because of wear of inner components and compressor s noise will increase accordingly Then it will get stable till the whole life of freezer 12 6 7 Why freezer s noise increases after stop use for sometime Answer After long time stop of freezer the crankshaft of compressor may be blocked by dirt brought in by lubrication oil or blocked by freezing lubrication oil because of low temperature For this reason compressor cannot be started or noise will increase after starting and the wear of crankshaft will increase too It is better that freezer doesn t stop use Sometimes newly bought freezer also has this characteristic After a period operation it will get normal 12 6 8 How to reduce freezer s noise At present all kinds of freezers have the problem of noise Scientists have been seeking a method to solve it but to little effect The fina
39. re can not be order 5 Change the controller started 6 Starting relay or thermal protection unit is out of order or broken 6 Change starting relay or thermal 7 Wire broken of motor starting coil or protection unit operation coil 7 Measure using RX1 position of avometer if there is wire broken 8 The compressor motor is burned or change compressor rotator and stator are blocked to dead 8 Change compressor 9 There is leakage of high pressure gas valve or the shaft is embraced to dead 9 Change compressor 1 The distance between temperatures 1 Adjust and make it close to sensing tube of temp Controller and evaporator cover evaporator are too big Compressor oe inp ekatire Contrelierts CULO 2 Change the temperature controller ae ae 3 Food stuffs in the freezer too much once MEM frequent j door opens too frequent and open time operation time too long but temperature drop in freezer is too slow too long 4 The environment temperature is too high humidity too high airflow is impeded 5 The frost layer at the evaporator is too thick 6 The refrigerant is insufficient or leakage 7 Compressor efficiency is reduced 8 The drying filter is blocked 4 Put the freezer to suitable place and make air circulate well 5 Remove frost regularly 6 Check or supplement refrigerant 7 Change compressor 8 Change new drying filter Compressor runs without stop 1 The knob of temperat
40. red to service operator s hands 7 The unpacking of the filter dryer of freezer should be opened right before use 12 4 Application and maintenance of freezer 12 4 1 Product characters 1 Completely green environmental bed type freezer uses R134a as the refrigerant which is recognized internationally It has an ozonosphere depletion coefficient ODP 0 New climate type design commercial freezer uses wide temperature zone design At 38 C 100 F high temperature the freezer can start and stop freely 2 New refrigeration system design it takes dual direction refrigeration system thus increases refrigeration speed and prolongs compressor life 12 4 2 Notice for use 1 The freezer should level the tilting angle when moving shall not be greater than 45 so that the sliding door could not move out from its guiding slot and other accident will not happen 2 The clearance between freezer and other objects should be more than 30 cm for ventilation and heat radiation 34 FREEZER Model HCMOS50EC Haier 3 Please don t leave the freezer at humid or corrosive gas area 4 Freezer should be placed at a place with proper ventilation away from heat source and avoiding direct sunlight At the first application please wait some time for operation in summer 6 hours in winter 4 hours when the temperature inside the freezer has 5 reached to 15 C and below then you can put food in If food
41. roximate value of sound power level The restriction to noise in national standard is more strict and scientific At present freezer noise is required to take sound power level stipulated in national standard 12 6 13 Why the noises of it type freezers are different Answer The noise of each qualified freezer ex factory is within the range of national standard Different types of freezers have different powers compressors used are not the same neither and so their noises are different Even for same type freezers as the noise of compressors are different their differences to national standard 52dB A are not the same and the noises are different 12 6 14 Why there are greater noises at starting and stopping of freezer Answer 1 At the starting of freezer starting relay will make sound The acceleration of motor will cause vibration of compressor and makes sound 4 7 FREEZER Model HCM050EC Haier MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 2 When freezer stops because of inertial rotation there will be vibration sound from compressor 3 When freezer stops the compressor decelerates high pressure and low pressure at gas exhausting tube and returning tube will get balance thus causes sound of compressor 4 At the starting of compressor if the voltage is low the hammer type starting relay will make loud sound Even if stabilizer is equipped with measurem
42. t be released in time at normal situation the motor starting coil will cut off in about 1s after starting This will make the coil temperature rising rapidly and then the thermal protection unit cuts off the circuit and stop operation When power is cut off the temperature of thermal protection unit reduces quickly and will switch power on when reaching the reset temperature At this time if the contact point has not been released the starting contact point could not contact tightly and it is in false connection This will make the compressor tremble thermal protection unit will open after a short time 2 Operating amperage too high Freezer operation current is too big and will not operate normally There are two reasons way 3 0 FREEZER Model HCMOS0EC Haie lt lt _ MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting First the freezer stops automatically after a few seconds after starting several minutes later it starts again and stops automatically again With in cycles like this and the motor or starter and thermal protection unit will burn up after a long time The main reason is the motor coil is shorted at some parts Second the freezer operates a certain time after starting but it will stop automatically before the temperature reduces before the desired temperature is reached After several minutes it will start again and the electricity consumption increases
43. tum value is 20 Pa S measuring surface enveloped area m 50 FREEZER Model HCMOS0EC Haie lt lt _ MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting Assume 11 12 13 is the length width height of freezer respectively unit is m A 11 2 d b 12 2 d c 13 2 d Take d 1m Then S 4 ab bc ac The positions of measuring points are shown in table 4 12 8Measuring technology of freezer performance parameter 12 8 1 Measuring content The measuring technology of freezer includes measurement of refrigeration property and measurement of safety requirement of electrical parts The following items must be done before ex factory 1 appearance requirement 2 cooling speed 3 leakage of current 4 insulation resistor cool state 5 electrical intensity 6 starting performance 7 ground resistor 8 sealing performance of refrigeration system 9 documents and accessories Spot tests for ex factory are 10 store temperature 11 insulation resistor wet state and hot state 12 electrical intensity wet state and hot state 13 Electricity consumption 14 noise and vibration 15 electroplated parts 16 painting cover 17 protection of anti electric shock 18 cables 19 door opening force 20 freezing ability 21 rising up speed of temperature with load 51 Type tests include items 1 2 8 9 10 13 17 18 20 21 and t
44. uation close valves 39 FREEZER Model HCMOS0EC Haie lt lt _ MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting Switch off motor 3 Filling Determine the filling quantity first according to the freezer being repaired Each small mark of the liquid tube is 25g each big mark is 100g Open all related valves When the liquid level has reached filling quantity close valves 4 Test run After filling turn on power to freezer for test run Observe the unit operation Switch off power 12 6 Freezer noise 12 6 1 Freezer noise sources Freezer noise comes from the expanding with heat and contracting with cold of compressor evaporator or condenser from the contacting or resonance of pipes from the flowing of refrigerant or from the vibration of freezer because the floor is not level etc 4 0 FREEZER Model HCMOS0EC Haie lt lt _ MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 6 2 Compressor Freezer noise mainly comes from the compressor The Compressor generates various sounds There are continuous and not continuous periodic and not periodic Their frequencies may be from tens of Hertz to thousands of Hertz Reasons for compressor noise are 1 There are two pieces thin elastic steel slice inside the compressor gas in valve and gas out valve when the freezer starts each stee
45. ure controller has been set to over cooling position 2 The contacting point of temperature 1 Change the position to moderate 2 Repair or change 2 6 FREEZER Model HCMOSOEC emesis controller is adhered in freezer is 3 The temperature sensing probe of 3 Adjust to suitable position too low controller is not placed well and causes normally contact tightly with maladjustment evaporator cover 4 Compressor efficiency reduced 4 Change compressor Compressor 1 Supplement a stabilizer adjust buzzes and 1 Voltage is too low to rated value cannot be 2 Change starting relay started 2 Starting relay out of order 3 Change compressor thermal 3 The starting coil of starting motor is protection broken 4 The shaft and piston in the unit jump 4 Compressor does not run compressor is blocked please repeatedly change Fk le cele a is not good it i SUppiement A Sevier ang After short ted goog adjust its value to rated time of JADE Ganer 2 Change over load protection 3 Starter contacting point is adhered ee operation nt unit 4 There is short circuit in compressor over load l 3 Change starting relay 5 There is mechanical problem in the protection 4 Change compressor compressor unit cuts off 5 Change compressor 6 Temperature around compressor is too a high 6 Increase heat radiation space i Res is not stable and in ie RSS Me Noar level y 2 Make the freezer bo
46. vely watch the indication of odometer The normal value is several Ohm to tens of ohm If the resistance is zero means that there is a short in the freezer circuit or there is a short caused by a bad compressor or fan motor The reason should be found out and repaired If the resistance is too big or infinite this means that there is broken circuit please check and solve it After the above checks the freezer will not have any electrical problem and you can switch power on for further completely check 17 FREEZER Model HCM050EC Haier 7Tx H_ v ef MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 1 2 Reasons of electricity leakage of freezer 1 Leakage of compressor mainly because of serious vibration the motor coil of compressor contacts with the shell the coat of enameled wire will come off some where and connect with shell Other reasons may be over voltage insufficient of voltage adverse circumstances temperature too high ventilation and heat radiation to bad for freezer thermal protection unit out of order etc They will make the motor coil over temperature insulation material loose insulation is damaged then electricity will occur 2 Leakage of motor connection terminals the connection terminals of fully enclosed compressor are made from high temperature soda glass sintered ceramics around the terminals are filled with a hig
47. you select The temperature control dial has 3 settings plus OFF l is the warmest IIl is the coldest Turning the dial to OFF stops cooling the freezer Set the dial to Il and allow 24 hours to pass before adjusting the temperature to your needs 15 FREEZER Model HCMOS50EC CIRCUIT DIAGRAM Haier Circuit Diagram Brief description of principle about HCMO50EC 1 The green lamp is a power indication lamp When the power is on the lamp will be on 2 Thermostat When the temperature in the freezer is higher and reaches the value for starting the machine the thermostat will be closed the compressor will run When the temperature in the freezer is lower and reaches the value for closing the machine the thermostat will be open thus the compressor will be stop running 1 6 FREEZER Model HCM050EC Haier 7vT7TV73 gt _ ef MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12 1 System Trouble shooting 12 1 1 Servicing freezer 1 Check the whole circuit of freezer if there are wire connections came off any wires broken or a short circuit 2 Check the insulation of the whole freezer At normal situation the resistance is greater than 2 mebohms if it is less than 2 mebohms please make a further check of the freezer resistance Set the voltmeter to R1 Ohm position put the two voltmeter leads pencils into L and N terminals respecti
48. zer is not level or if the floor is loose please adjust the base cover or fasten the floor 2 If noise is caused by tighten loose of screw between the base cover and freezer body please make it tight 3 If the reason for noise is the aging rubber cushion of compressor or a loose fastening clip please change rubber cushion or secure clip 4 If tubing bumps against freezer body or against each other make adjustments accordingly to remove noise 5 If fan blade is blocked and thus causes noise please clear the obstacles around the fan or adjust fan blades 6 If the fan supporter is loose and noise is caused please tighten 12 1 7 Poor freezing effect analysis and solutions 1 Check the position of temperature control dial if it is set at weak position please change to middle or close to strong position 23 FREEZER Model HCM050EC Haier 7vT7TV73 gt _ er MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 2 Check the rear side and the top of freezer if it is too close to the wall or not if the freezer is under sunlight directly or if it is near thermal source or not if the room temperature is too high or not if the condenser is blocked by cloth pieces or paper or dirt or not Any one of these matters will affect heat radiation of condenser and refrigeration ability will be reduced 3 Check if there are too much food
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