BD-478A Freezer Service Manual 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 PDF created with pdfFactory trial version www.pdffactory.
Contents 1. Contents……………………………………………………………………….……1 2. Product Code Illumination and Series Introduction…………………………… 2 3. Features …………………………………………………………………………... 3 4. Specifications………………………………………………………………………4 5. Safety Precautions(including Warning and Cautions)………………………...5 6. Net Dimension……………………………………………………………… …....7 7. Installation and Accessory Parts ………………………………………………. 8 8. Parts and Functions …………………………………………………………… 12 9. System Flow Chart………………………………………………………………13 10.
PRODUCT CODE ILLUMINNATION AND SERIES INTRODUCTION Product Code Illumination and Series Introduction B D -- □ A B C □ D A: The first letter of “FREEZER” in Chinese spelling. B: The first letter of “FREEZER” in Chinese spelling. C: Capacity. (Unit: litre). D: Improve Series Number. ２ PDF created with pdfFactory trial version www.pdffactory.
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.
SPECIFICATIONS Specifications Model BD-388A BD-478A Capacity (L) 388 478 Power Supply (V/Hz) 220V~ /50Hz 220V~ /50Hz Unit Dimension (W*D*H) 1420*715*810 1690*715*810 Unit Weight (Kg) 72 78 Box Dimensions (W*D*H) 1495*765*870 1765*765*870 Box Weight (Kg) 84 91 Container Quantity (40HC’) 66 57 ４ PDF created with pdfFactory trial version www.pdffactory.
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. 2. This freezer must be properly installed in accordance with the installation section. Instructions before it is used, See grounding instructions in the installation section. 3.
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. ６ PDF created with pdfFactory trial version www.pdffactory.
NET DIMENSION Net Dimension Ha H W L 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.
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.
INSTALLATION AND ACCESSORY PARTS Installation and Accessory Parts l Do not over fill freezer for proper internal air circulation. Electrical Requirement l Make sure there is a suitable power Outlet (220V) with proper grounding to power the freezer. l Avoid the use of cutting off the third grounding , this is a dangerous practice since it provides no effective grounding for the freezer and may result in shock hazard.
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.
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. 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) ·Turn the temperature control to 0 position and unplug the unit.
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.
FUNCTION SCHEDULE Function Schedule 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. In case you unplug your freezer or experience an electrical outage, allow 5 minutes before plugging it back in.
CIRCUIT DIAGRAM Circuit Diagram Brief description of principle about BD-318A/428A: Brief description of principle about 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.
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 respectively, watch the indication of odometer.
(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.
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.
(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.
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.
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.
(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.
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 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.
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.
Problems Reasons Removing methods 1. Check if there is short circuit and solve it, if not, change capable fuse 2. Check and connect tightly, or change. 3. Use till voltage rises to rated value or attach a stabilizer. 4. Rotate the knob to wanted position for suitable temperature. 5. Change the controller. 1. Fuse is broken 2. The contact of plug, socket, and cable is not good. Cable broken. 3. The voltage is too low, 10-15% less than rated voltage 4.
repeatedly. After short time of operation, over load protection unit cuts off Too much noise when compressor runs There is no frost at evaporator Frost at evaporator is not full change. 1. The voltage is too high. 2. Over load protection unit is not good, it jumps earlier. 3. Starter contacting point is adhered. 4. There is short circuit in compressor. 5. There is mechanical problem in the compressor. 6. Temperature around compressor is too high. 1. The floor is loose. 2.
The fan 1. Check if any connection has come off. doesn’t run 2. Check is the fan is burned. 1. Change the fan. 2. Change the fan. 1. Change temperature controller. 2. Use brush to remove dust. 3. Make the temperature dry and control the environment humidity. 1. The service time is too long. Electricity leakage of 2. The environment is too dirty. temperature 3. Humidity is too high. controller 1. There is leakage of temperature Temperature sensing medium. Change temperature controller. controller out 2.
(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.
bad thermal protection unit is normally caused by burn contact points or a bad heating wire. ⑤ The motor winding are burned. 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.
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 bad.
(1) Operation method of repairing equipment (please see instruction manual). (2) Special requirements ① The time interval from opening of compressor to the beginning of evacuation can not exceed 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 N2 before welding.
(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.
(4) When seal plug of compressor is removed, if there is no gas flowing 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 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.
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. (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.
(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.
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.
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.
12.5.1 Freezer repair tool and equipment (1) Recovery machine (2) N2 container, 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) 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 Connect recovery machine hoses to system fittings ② Switch on power. ③ Switch on motor. ④ Open all related valves. ⑤ Observe the pointer of vacuum meter when it is accessing the mark –1.
(3) Filling ① 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). 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.
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 steel slice will open and close about 47 times per second, this will cause vibration sound.
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.
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.
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.
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.
(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.
approximate 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.
(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, measurement 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.
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.
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.
A=l1/2 +d b=l2/2 +d c=l3/2 +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 parameter performance 12.8.1 Measuring content The measuring technology of freezer includes measurement of refrigeration property and measurement of safety requirement of electrical parts.
temperature with load. Type tests include items (1), (2), (8), (9), (10), (13), (17), (18), (20), (21) and the 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.
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 accessible metal parts, using AC power of load empty voltage not over 12V 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.
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 thus keep the room temperature uniformly. The temperature of test room is adjustable within the range of 10-43℃.
Small Middle Big Dimensions (mm) 25×50×100 50×100×100 50×100×200 Mass (g) 125 500 1000 Note In the geometrical center of 5oog pack, there is a thermal element; this pack is called M pack. 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.
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 <> 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).
types 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; test of storage temperature, ice producing ability, etc.
Exploded View Edition:2005 12 01 Marketing model: BD-388A/478A CARTON USER MANAUL LIST OF PARTS Parts list ５７ PDF created with pdfFactory trial version www.pdffactory.
No. Spare parts number Spare parts description in english Model the proportion of Failure QTY. Price list the Remark rate spare-part stock 1 0070803227 Lock BD-388A/478A 1 0.931% 1.400% * 2 0070804794 Handle BD-388A/478A 1 0.168% 0.200% X BD-388A 1 0.490% 0.500% X Door BD-478A 1 0.490% 0.500% X 4 0072040003 Top hinge cover BD-388A/478A 2 0 0.050% X 5 0072040011 Bottom hinge cover BD-388A/478A 2 0 0.
28 0070202885 Panel control BD-388A/478A 1 0 0 X 29 0075040013 Thermostat BD-388A/478A 1 0.392% 0.600% * 30 0072070010 Thermostat protecting-bag BD-388A/478A 1 0 0 X 31 0070102761 Capacitor clip BD-388A/478A 1 0 0 * 32 0077010062 Screw BD-388A/478A 1 0 0 X 33 0075020333 Capacitor BD-388A/478A 1 0.010% 0.030% * 34 0075020357 Terminal cover BD-388A/478A 1 0 0.005% * 35 0075020335 Over load over heat protector BD-388A/478A 1 0.010% 0.
63 0075080006 Lamp switch BD-388A/478A 1 0.010% 0.020% * 64 0075120011 Lamp BD-388A/478A 1 0.010% 0.020% * 65 0077050051 Screw BD-388A/478A 2 0.010% 0.
