Haier HF-346KA, Service Manual

Page 1: ...gy efficient to European Class A standards l Refrigeration capacity l Toughened glass food shelves l European style streamline appearance design Haier Group Serial number ER03SM0120 05 Version number 00 00 Edition 2003 05 06 Models HF 346KA HF 346KAME ...

Page 2: ...ct code illumination and Series Introduction 2 3 Specifications 3 4 Safety precautions 4 5 Parts and Functions 7 6 Function Schedule 8 7 System Flow Chart 9 8 Circuit Diagram 10 9 Maintenance Service and Trouble Shooting 11 CONTENT ...

Page 3: ...Product code illumination and Series Introduction H F 346 KA Haier product Freeze Gross capacity according to export country standard Family line 2 series Product code illumination and Series Introduction ...

Page 4: ...40 50 220 240 50 Rated Input Power W 160W 160W Power Consumption kW h 24h 0 81 0 81 Net Weight kg 82 82 Gross Weight kg 98 98 Unit Dimension D W H mm 670X604X1750 670X604X1750 Packing Dimension D W H mm 730X685X1840 730X685X1840 Container Quantity 40 PCS 69 69 Container Quantity 40 HC PCS 69 69 Specifications ...

Page 5: ...4 Safety precautions Safety precautions ...

Page 6: ...5 Safety precautions ...

Page 7: ...6 Safety precautions ...

Page 8: ...7 Parts and Functions HF 346KA 346KAME Parts and Functions ...

Page 9: ...Function Schedule 1 Energy efficient to European Class A standards 2 Variable temperature drawer 3 Automatic temperature controlling system 4 European style streamline appearance design Function Schedule ...

Page 10: ...tem Flow Chart 2 Brief Description of System Flow Chart HF 346KA 346KAME is a direct cooling double circling Freezer which has automatic controlling system When the Freezer is just powered on the refrigerant flows in the sequence System Flow Chart ...

Page 11: ...ption of Control Principle Brief Description of Control Principle HF 346KA 346KAME is a direct cooling freezer with a double system and a automatic controlling temperature system The thermostat directly controls the start and stop of compressor Circuit Diagram ...

Page 12: ...harge it by shorting the terminals with an insulated screw driver No continuity between terminals If normal resistance drops to 0 temporarily then rises to infinity In upside down position check for continuity between terminal 2 and 6 YES YES Cause of trouble NO NO Overload protector Starting relay Thermostat Indication Check point YES Does compressor run YES Is power supplied to the compressor NO...

Page 13: ...he evaporator does not get cold YES YES This cycle is repeated The condensor also gets warm and then gets cold as the evoporator gets warm The evaporator is partially cooled and then gets warm again Is the sealing of the gasket in good condition Is the temperature control knob in a suitable position Are there excessive storage foods in the refrigerator causing interference with the circulation of ...

Page 14: ...ure difference is still greater after the compressor has just stopped running the refrigerant will flow for a certain time therefore this sound is a normal phenomenon 2 A click sound can often be heard from the refrigerator This is a normal sound produced by the pull in or release of the armature of a current deadweight start relay when starting the compressor The compressor motor will produce a s...

Page 15: ...on the domestic refrigerator locations and natures of troubles should be determined according to their respective features therefore experience in servicing is very important to troubleshooting Service technicians with rich experience can correctly locate them and take reasonable remedy measures based on their comprehensive analysis of trouble characteristics as well as operating conditions for va...

Page 16: ... like gentle whistling accompanied by a sound similar to water flowing this is the sound produced by the normal circulation of refrigerant within the evaporator In case only the gas flowing sound can be heard and there is no water flowing sound this indicates that the refrigerant has already percolated If neither the flowing sound nor the gas sounds from the evaporator can be heard this means that...

Page 17: ...wo or more abnormal phenomena may occur simultaneously due to a certain trouble With this method you can reject some suspicious troubles and finally make a correct judgment 7 Analysis of Troubles and Troubleshooting A Poor Refrigerating Effect The so called poor refrigerating effect refers to the fact that the refrigerator can operate and refrigerator normally but the temperature in the refrigerat...

Page 18: ...frigerator temperature drops slowly and frost appears on the gas return tube b In case excessive refrigerant has been charged the liquid refrigerant that cannot evaporates in the evaporator will return to the compressor and thus a phenomenon of liquid striking will occur The liquid refrigerant evaporates and effervesces as soon as it flows into the refrigerating oil at the bottom of compressor If ...

Page 19: ...rt 5 Too thick frost layer formed on evaporator Analysis of Trouble If a direct cooling refrigerator is to be used for a prolonged period of time be sure to defrost its evaporator regularly if you fail to do so the frost layer on the evaporator tubing will become thicker and thicker Heat conduction will be severely affected when the whole tubing is wrapped with a transparent ice layer and finally ...

Page 20: ...ture lower than that in normal conditions and for a severe clogging even dew condensation as frosting may appear Remedy Purge the tubing and after replacing the dry filter with a new one or clearing it thoroughly recharge the system with refrigerant and seal the charging port B No Refrigerating The phenomenon that the compressor runs normally but no frost or only a little frost appears on the evap...

Page 21: ...mperature reaches below 0 water will accumulate at the narrow part of the capillary and clog it gradually then frost begins to melt at the evaporator no gas flowing sound can be heard and the gas suction pressure assumes a state of vacuum Note that these phenomena will appear intermittently sometimes the refrigerator works well and sometimes not well In order to determine whether it is clogged wit...

Page 22: ...ing the filter nay cause a passage for flowing Touching it with your hand you will feel that it is cooler compared with its temperature in the normal state Remedy The same as described in the capillary clogging with dirt 3 Troubles of Compressor a Breakage of gas suction and discharge valve blocks Analysis of Trouble The compressor works by means of the opening and closing of gas suction valve and...

Page 23: ...or Remedy Open the tubing re evacuate and then charge the system with a proper quantity of refrigerant b Air left in the system Analysis of Trouble The residual air in the system will circulate together with the refrigerant in the system The major symptoms caused by this residual air is higher gas discharge pressure higher discharged gas temperature the gas discharge tubing is considerably hot whe...

Page 24: ...hence the motor stops running If the motor is still running continuously in such a case its windings will be burned out Remedy Reduce the thermal load pay attention to the variation in voltage of the power supply c Abnormal thermal protection Analysis of Trouble The compressor current is within its normal range but the thermal protector actuates repeatedly Remedy Replace the thermal protector with...

Page 25: ...eck the circuit voltage to see whether it is normal Analysis of trouble If the circuit voltage is obviously lower than its rated value it will be difficult to start the motor and a hum sound can be heard from it Remedy Measure the voltage with a voltmeter if it is really too low give directions to the user for buying a stabilizer so as to step up the voltage thus normal operation can be achieved 3...

Page 26: ... repair or replace it with a new one c Poor electric contactor in thermostat Analysis of Trouble Burnout of contactor and leakage of temperature sensing agent may occur generally Remedy Replace the old with a new one d Check the terminals for loose connection and electric circuits for other abnormal phenomena 5 Mechanical faults of compressor a Seizing of shaft This phenomenon is caused mostly by ...

Page 27: ...heckup if it is totally out of functioning replace it with a new one 3 evaporation temperature is too high in refrigerating system resulting in lower refrigerating capacity and hence continuous running of compressor Analysis of Trouble Leakage of refrigerant and clogging in a refrigerating system will directly affect its refrigerating capacity Due to the reduction in its refrigerating capacity the...

Page 28: ... a test pencil its neon lamp will come on In that case the first thing you need to do is to determine whether the grounding is perfect If the grounding is no problem turn off the refrigerator immediately then check the insulation of electric circuits with an avometer b Serious electric leakage Never touch the case body of the refrigerator its door handle or other metal parts with your hand Test th...

Page 29: ...sening of parts may cause vibration and noise 4 Inspection method To find the sources of noise press the vibration spot with your hand while the refrigerator is in operation and listen attentively whether the vibration becomes weaker or vanishes If the refrigerator has not been levelly placed put a level meter on its top table and adjust the leveling screws on its legs In case noise occurs from th...

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