Haier BD-478A service manual Why freezer cannot be used at low temperature environment

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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.

12.1.9Why 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.

12.1.10How 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.

MAINTENANCE SERVICE AND TROUBLE SHOOTING

Maintenance Service and Trouble Shooting

12.1.11 Freezer problem analysis and service

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Contents BD-478A Contents Product Code Illumination and Series Introduction First letter of Freezer in Chinese spellingFeatures FeaturesSpecifications BD-388A BD-478ASafety Precautions Safety Precautions Net Dimension 1420*715*810 1690*715*8101420*715*1470 1690*715*1470 Installation and Accessory Parts ·Proper Air CirculationElectrical Requirement Installation and Accessory Parts Defrosting and Draining The Freezer Food Storage BasketSystem Flow Chart Adjustable temperature dial Function ScheduleMaintenance Service and Trouble Shooting Brief description of principle about BD-318A/428AServicing freezer Reasons of electricity leakage of freezerMaintenance Service and Trouble Shooting Maintenance Service and Trouble Shooting Troubleshooting by sounds Troubleshooting by touch System noise repair Poor freezing effect analysis and solutions How to handle the seal bar for poor sealing Why freezer cannot be used at low temperature environment How to know there is problem with compressor MotorPage Page Procedure for fan change Procedure for temperature controller changeCommon freezer problems Operation of freezer is not normal Service procedure Repair equipment RequirementsEvacuation and fill machine is special only for R134a use Changing procedure of R134a compressor Compressor installation and brazing procedures Application and maintenance of freezer Product charactersPage Safety notice of product MaintenanceStandard procedure of maintenance 12.5 Freezer repair tool and equipment It is not allowed to fill R134a by R12 filling equipmentProcedure for filling equipment ⑧ Switch off motorFreezer noise sources CompressorFilling Resonance sound of compressor components How is the sound of water flowing generated? Gas flowing soundWhy the freezer’s noise increases after using Why freezer’s noise increases after stop use for sometime? How to reduce freezer’s noise?Why freezer noise changes greater at night? Sometime?Why freezer noise measured at home is incorrect? What are the national stipulations for freezer Noise?Page Why the noises of it type freezers are different? AnswerHow to determine that the sound is noise or Normal? Noise test There are stipulations in Items 6.5.7.1 and 6.3.6.1.of GB/TMaintenance Service and Trouble Shooting 12.8Measuring technology of freezer performance parameter Temperature with load Test method and instrumentGround resistor Maintenance Service and Trouble Shooting Maintenance Service and Trouble Shooting Maintenance Service and Trouble Shooting Exploded View List of Parts QTY BD-388A/478A 392% 600% Lamp switch BD-388A/478A 010% 020%