Haier BD-478A Service Manual

Haier freezer service manual

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Page 1 BD-478A ●Features ●Door lock for safety storage ●High pressure foam cover for efficient Temperature preservation. ●Adjustable thermostat. ●Superior insulation. ●Efficient defrosted storage ●Designed for cafeterias restaurants and hotels Haier Group Manual No.:BD-478A Edition:20051201 PDF created with pdfFactory trial version www.pdffactory.com...
Page 2: Table Of Contents
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.
Page 3: Product Code Illumination And Series Introduction
Product Code Illumination and Series Introduction A: The first letter of B: The first letter of “ C: Capacity. (Unit: litre). D: Improve Series Number. PDF created with pdfFactory trial version -- □ □ “FREEZER” in Chinese spelling ” FREEZER in Chinese spelling ２ www.pdffactory.com...
Page 4: Features
FEATURES Features ●Door lock for safety storage ●High pressure foam cover for efficient Temperature preservation. ●Adjustable thermostat. ●Superior insulation. ●Efficient defrosted storage ●Designed for cafeterias restaurants and hotels ● Low power consumption 20% less than the other similar freezers ● Imported high quality compressor 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...
Page 5: Specifications
Model Capacity (L) Power Supply (V/Hz) Unit Dimension (W*D*H) Unit Weight (Kg) Box Dimensions (W*D*H) Box Weight (Kg) Container Quantity (40HC’) PDF created with pdfFactory trial version BD-388A 220V~ /50Hz 1420*715*810 1495*765*870 ４ www.pdffactory.com SPECIFICATIONS BD-478A 220V~ /50Hz 1690*715*810 1765*765*870...
Page 6: Safety Precautions(Including Warning And Cautions)
Note: If for any reason this product requires service, we strongly, recommend that a certified technician perform the service. 6. 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.
Page 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.
Page 8: Net Dimension
NET DIMENSION Net Dimension Model BD-388A BD-478A Unit Dimension (W*D*H) 1420*715*810 1690*715*810 Dimension (Door open) 1420*715*1470 1690*715*1470 ７ PDF created with pdfFactory trial version www.pdffactory.com...
Page 9: Installation And Accessory Parts
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.
Page 10 Install Limitations Do not install your freezer in any location not properly insulated or heated e.g. garage etc, Select a suitable location for the freezer on a hard even surfaces away from direct sunlight or heat source e.g.
Page 11 Operating Your Freezer INSTALLATION AND ACCESSORY PARTS Installation and Accessory Parts Once the freezer is in its proper place, plug it in an electrical outlet having 220 volts. Set the temperature, on the temperature contrail knob.”1”being the warmest and “6”being the coldest. Initially set the temperature on”3”. Place food inside the freezer After using the freezer for 24 hours set the freezer to your desired setting.
Page 12 INSTALLATION AND ACCESSORY PARTS Installation and Accessory Parts 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 ·Defrost whenever the frost becomes 5MM thick.
Page 13: System Flow Chart
SYSTEM FLOW CHART 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. １２ PDF created with pdfFactory trial version www.pdffactory.com...
Page 14: Function Schedule
The temperature level you select. The temperature control dial has 6 settings plus 01.”1”is the warmest,”6”is the coldest. Turning the dial to 0 stops cooling the freezer. Set the dial to “3”and allow 24 hours to pass before adjusting the temperature to your needs.
Page 15: Circuit Diagram
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.
Page 16 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.
Page 17 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.
Page 18 (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...
Page 19 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.
Page 20 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.
Page 21 MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting (1) If the freezer is not level, or if the floor is loose, please adjust the base cover or fasten the floor. ２０...
Page 22 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 PDF created with pdfFactory trial version ２１...
Page 23 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 stored in the freezer, if hot food has been put in or not, Too full of food is not good for cold air circulation.
Page 24 12.1.9 Why freezer cannot be used at low temperature environment 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.
Page 25 Controller and evaporator are too big. 2. The temperature controller is out of Compressor order. starts 3. Food stuffs in the freezer too much, frequent, door opens too frequent and open time operation too long. time too long, 4.
Page 26 5. There is mechanical problem in the protection compressor. unit cuts off 6. Temperature around compressor is too high. 1. The floor is loose. 2. The freezer body is not stable and in level. 3. When between tubes and freezer body causes much resonance. noise when 4.
Page 27 1. Check if any connection has come off. doesn’t run 2. Check is the fan is burned. Electricity 1. The service time is too long. leakage temperature 2. The environment is too dirty. controller 3. Humidity is too high. 1. There is leakage of temperature Temperature sensing medium.
Page 28: Common Freezer Problems
(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...
Page 29 ⑥ 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.
Page 30: Service And Technical Requirements Of R134A Freezer
(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. MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting 12.3.3 Service procedure...
Page 31 10 minutes. ② The evacuation time shall not be less than 45 min. ③ In case there is leakage of freezer, if leakage occurs at high-pressure end, it is repairable. Please blow high purity N 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.
Page 32 (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.
Page 33: Application And Maintenance Of Freezer
(5) Compressor has no seal plug it cannot be used. (6) There should be no grease adhered 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...
Page 34 (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.
Page 35 (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 waited for starting again, otherwise the compressor or refrigeration system will be damaged.
Page 36 (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 rust.
Page 37 (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 trademark. (9) Wipe the 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.
Page 38 12.5.1 Freezer repair tool and equipment (1) Recovery machine (2) N container, O (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.
Page 39 (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 ① Visually inspect recovery machine for abnormalities, etc. ② Keep all valves closed to equipment until really to proceed. (2) Evacuation ①...
Page 40: Freezers Noise
② Open all related valves. ③ When the liquid level has reached filling quantity, close valves. (4) Test run ① After filling, turn on power to freezer for test run. Observe the unit operation. ② Switch off power. 12.6 Freezer noise 12.6.1 Freezer noise sources...
Page 41 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 steel slice will open and close about 47 times per second, this will cause vibration sound.
Page 42 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.
Page 43 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.
Page 44 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...
Page 45 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.
Page 46 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;...
Page 47 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.
Page 48 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.
Page 49: National Standard For Noise
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).
Page 50 20μPa); S—measuring surface enveloped area, m MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting Assume l1, l2, l3 is the length, width, height of freezer respectively, unit is PDF created with pdfFactory trial version ４９ www.pdffactory.com...
Page 51: Measuring Technology Of Freezer Performance Parameter
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);...
Page 52 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 greater than 0.5g.
Page 53 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.
Page 54 MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting (3) Test pack: Use the rectangle packs of following dimensions as the load of freezer. (4) Table 6-2 Test packs for freezer performance PDF created with pdfFactory trial version Suitable Measuring temperature (℃)
Page 55 Dimensions (mm) Small 25×50×100 Middle 50×100×100 50×100×200 The contents of test packs are (take 1000g pack 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.
Page 56 <<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.
Page 57: Exploded View
25℃; T type 32℃. 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) Freezer and freezing freezer;...
Page 58: List Of Parts
Exploded View Marketing model: BD-388A/478A Edition:2005 12 01 CARTON USER MANAUL LIST OF PARTS Parts list ５７ PDF created with pdfFactory trial version www.pdffactory.com...
Page 59 0070202887 panel cover 0070202886 yellow light 0075050003 Green light 0075050008 Light cover 0072040202 PDF created with pdfFactory trial version Model english BD-388A/478A BD-388A/478A BD-388A BD-478A BD-388A/478A BD-388A/478A BD-388A/478A BD-388A BD-478A BD-388A/478A BD-388A/478A BD-388A/478A BD-388A BD-478A BD-388A/478A BD-388A/478A BD-388A/478A BD-388A/478A BD-388A/478A...
Page 60 Panel control 0070202885 0075040013 Thermostat 0072070010 Thermostat protecting-bag Capacitor clip 0070102761 0077010062 Screw 0075020333 Capacitor 0075020357 Terminal cover 0075020335 Over load over heat protector 0075020168 PTC starting 0075020356 Terminal board 0074090595 Compressor 39 0075020001 Rubber spacer 40 0075020305 Compressor sleeve 41 0075020136 Compressor spring washer 42 0075020137...
Page 61 Lamp switch 0075080006 Lamp 0075120011 Screw 0077050051 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 spare-parts warehouse,and should be marked with"*"...

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