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Freezer Model:FHV5SGWW/FHV7SGWW

２８

MAINTENANCE SERVICE AND TROUBLE SHOOTING

Maintenance Service and Trouble Shooting

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

①

The fuse is burned, or the contact of plug and socket is not well, or the

voltage is too low.

②

The knob of temperature controller is set to off position.

(2) In side factors

①

Electrical problem of freezer (normally caused by connection terminals

coming off or not in good contact).

②

Temperature controller out of order (contact point are burned or switch

element is damaged, etc.).

③

The start capacitor is bad.

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Summary of Contents for FHV5SGWW

Page 1: ...th castors Mechanical temperature control with power indicator High pressure foam cover for efficient Temperature preservation Eximious water disposal device Wide climate zone design Manual No FHV5 7SGWW Edition 20051130 FHV5SGWW FHV7SGWW PDF created with pdfFactory trial version www pdffactory com ...

Page 2: ...Flow Chart 12 10 Function Schedule 13 11 Circuit Diagram 14 12 Maintenance Service and Trouble Shooting 1 System Troubleshooting 16 2 Common freezer problems 28 3 Service and technical requirements of R134a freezer 30 4 Application and maintenance of freezer 33 5 Procedure and tools required for evacuation and Charging 38 6 Freezers Noise 40 7 National Standard for noise 49 8 Measuring technology ...

Page 3: ...CODE ILLUMINNATION AND SERIES INTRODUCTION Product Code Illumination and Series Introduction F H V S G W W A B C D E F G H A The first letter of FREEZER B C D Capacity Unit 10Cu Ft E PDF created with pdfFactory trial version www pdffactory com ...

Page 4: ...treamline shaped and top opening with castors Mechanical temperature control with power indicator High pressure foam cover for efficient Temperature preservation Adjustable thermostat Eximious water disposal device Wide climate zone design PDF created with pdfFactory trial version www pdffactory com ...

Page 5: ... 199 Power Supply V Hz 220V 50Hz 220V 50Hz Power Consumption kW h day 0 85 1 15 Unit Dimersion W D H 804 610 850 940 610 850 Unit Weight Kg 40 42 Box Dimensions W D H 860 637 890 995 637 890 Box Weight Kg 45 48 Container Quantity 40HC 135 126 PDF created with pdfFactory trial version www pdffactory com ...

Page 6: ...y puling on the power cord Always grasp the plug firmly and pull straight out from the outlet 4 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 5 Unplug your freezer before cleaning or before making any repairs Note If for any reason this produ...

Page 7: ...sed 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 PDF created with pdfFactory trial version www pdffactory com ...

Page 8: ...W FHV7SGWW ７ NET DIMENSION Net Dimension Model FHV5SGWW FHV7SGWW Unit Dimension W D H 804 610 850 940 610 850 Dimension Door open W D H 804 610 1370 940 610 1370 PDF created with pdfFactory trial version www pdffactory com ...

Page 9: ...ezer on a floor strong 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 to plugging This is to allow the refrigerant to settle Proper Air Circulation l To assure your freezer works at the maximum effic...

Page 10: ... l Select a suitable location for the freezer on a hard even surfaces away from direct sunlight or heat source e g radiators baseboard heaters cooking appliances etc Any floor unevenness should be corrected Installing Casters delete 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...

Page 11: ...esired 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 you select The ...

Page 12: ...g 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 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 ...

Page 13: ...Freezer Model FHV5SGWW FHV7SGWW １２ PARTS AND FUNCTIONS Parts and Functions PDF created with pdfFactory trial version www pdffactory com ...

Page 14: ...igeration 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 PDF created with pdfFactory trial version www pdffactory com ...

Page 15: ...e 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 you select The temperature control dial has 7settings plus OFF 1is the war...

Page 16: ...tion lamp When the power is on the lamp will be on 3 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 PDF created with pdfFactory t...

Page 17: ...ce Set the voltmeter to R1 Ohm position put the two voltmeter leads pencils into L and N terminals respectively 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 bi...

Page 18: ...ion 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 high polymer The terminals and insulation material must ha...

Page 19: ...lay 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 operati...

Page 20: ...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 evaporato...

Page 21: ...ter 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 conde...

Page 22: ...f 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 st...

Page 23: ... 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 solu...

Page 24: ...t 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 ...

Page 25: ...onment When environment temperature is below 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 ...

Page 26: ...ange compressor 9 Change compressor Compressor starts too frequent operation time too long but temperature drop in freezer is too slow 1 The distance between temperatures sensing tube of temp Controller and evaporator are too big 2 The temperature controller is out of order 3 Food stuffs in the freezer too much door opens too frequent and open time too long 4 The environment temperature is too hig...

Page 27: ... vibration absorption suspending spring is broken 1 Reinforce the floor 2 Make the freezer body stable 3 Move the tube a little away to avoid friction 4 Make the screw tight 5 Adjust the degree of tight or loose of vibration absorption cushion or change cushion 6 Change compressor There is no frost at evaporator 1 There is serious leakage of refrigerant 2 There is dirt blocked the capillary or sys...

Page 28: ...emove dust 3 Make the temperature dry and control the environment humidity Temperature controller out of order 1 There is leakage of temperature sensing medium 2 Damage of cam of contacting point spring etc Change temperature controller The probe of temperature sensing tube doesn t contact evaporator well It has not been mounted to position or changed during transportation Mount it again 12 1 12 P...

Page 29: ... 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 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 t...

Page 30: ...for proper operation is 220V 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 cannot 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 rapi...

Page 31: ...e temperature reduces before the desired temperature is reached After several minutes it will start again and the electricity consumption increases 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 freez...

Page 32: ...s than 45 min In case there is leakage of freezer if leakage occurs at high pressure end it is repairable Please blow high purity N2 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...

Page 33: ...d 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...

Page 34: ...r 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 des...

Page 35: ...n 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 and below then you can put food in If food 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 pow...

Page 36: ...2 4 3 Safety notice of product 1 The freezer needs to be on a separate ground circuit with a 5A minimum carrying capacity 2 If the electrical cable needs to be extended the cross section of extending wire should not be less than 1 5mm2 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...

Page 37: ...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 water or soap water non corrosive neutral detergent is available After cleaning please make it dry by using cloth so as to avoid...

Page 38: ...ing 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 abno...

Page 39: ...ainer O2 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 PDF created with pdfFactory trial version www pdffactory com ...

Page 40: ...dure 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...

Page 41: ...uid 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 fro...

Page 42: ...r 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 ...

Page 43: ...r 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 motor 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 us...

Page 44: ...at 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 freezer is not unif...

Page 45: ...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 no...

Page 46: ...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 52 dB A sound power level The noise at offices we stay everyday or other public places is much higher than this freezer no...

Page 47: ...r 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 noi...

Page 48: ...f 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 noise...

Page 49: ...surement 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 r...

Page 50: ...ve 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 freezing fre...

Page 51: ... 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 f...

Page 52: ...ogy 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 accessor...

Page 53: ...ts 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 Leakage inspection instrument is set to 0 5g of yearly leakage check every position of refrigeration system Leakage at any point shall not great...

Page 54: ...round 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 ...

Page 55: ...d thus keep the room temperature uniformly The temperature of test room is adjustable within the range of 10 43 2 Temperature requirements for different climate freezers please refer to 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 excee...

Page 56: ... as the datum hydroxyethlmethylcellulose 230g water 764 2g sodium chloride 5g parachlorometacresol 0 8g The freezing point of filling of pack is 1 its thermal property is similar to lean beef 5 Temperature measuring gauge 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 Its temperature b Insert...

Page 57: ... the Relative humidity referring table for environment test GB6999 86 7 Cooling speed Leave the freezer at test room room temperature is 32 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 tm max in accordance with table 13 3 cooling te...

Page 58: ...ess than 110 of rated Other tests to be done the measurement of temperature of storage 10 Freezer and freezing freezer test of storage temperature ice producing ability etc Table 6 3 Storage temperature of freezer Storage Cabin Climate type Climat e type Environme nt temp t1 t2 t3 tm max Cooling cabin Freezing cabin 10 Sub temp erate SN 32 1 t1 t2 t3 10 7 16 Temperat e N 32 0 t1 t2 t3 10 5 8 tcm 1...

Page 59: ...Freezer Model FHV5SGWW FHV7SGWW ５８ Exploded View Model FHV5SGWW FHV7SGWW Manual No BD 146G Edition 2005 11 30 PDF created with pdfFactory trial version www pdffactory com ...

Page 60: ...5 0 30 13 0070201812 Hole cap large 1 0 027 0 0 X 14 0072040012 Drain plug 1 0 034 0 0 X 15 0077070015 Washer 4 0 003 0 0 X 16 0070101899 Castors 4 0 397 0 30 0 60 17 0070202498 Thermostat knob 1 N A 0 0 X 18 0075050002 Red light 1 0 230 0 50 1 00 19 0075050008 Green light 1 0 670 0 50 1 00 20 0070202499 Control panal 1 N A 0 05 0 10 21 0075040013 Thermostat 1 2 587 0 10 0 20 22 0070401521 Wire 1 ...

Page 61: ...40 57 0070501088A Carton FHV7SGWW 1 2 552 0 20 0 40 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 m 2 easy damaged The spare part which is often damaged and the customer must stock in the spar...

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