Haier HRFN-250DAA, Service Manual

Page 1: ...ECTLY BEFORE OFFERING SERVICE Refrigerator SERVICE MANUAL Features 1 Mechanical temperature control 2 Adjustable thermostat 3 100 HFC free and FCKW free 4 External condenser and adjustable feet 5 stylish interior light MODEL HRFN 250DAA Haier Group HRFN 250DAAS ...

Page 2: ...ENTS CONTENTS 1 SAFETY PRECAUTIONS 2 SPECIFICATIONS 4 PARTS IDENTIFICATIONS 6 SYSTEM FLOW PRINCIPLE 7 CIRCUIT DIAGRAM 8 MAINTENANCE SERVICE AND TROUBLE SHOOTING 9 ANALYSIS OF TROUBLES AND TROUBLESHOOTING 13 ...

Page 3: ...ssor or an abn ormal sound from the co mpressor in operation In this condition an automatic voltage regulator over 750W should be added 11 Take care not to damage the supply line Don t yank at the line pull the plug out gently from the receptacle Don t press the line under the cabinet or step on it Take care not to roll on or damage the supply line when moves the machine from the wall 12 Don t use...

Page 4: ... a damp place else the insula tion of the refrigerator may be impaired 21 Any disassembly or alter nation to the refrigerator is strictly forbidden Da mage to the refrigeratio n pipeline is prohibited Service to the refrigerator must be carried out by professionals 22 Don t put bot tles of bear and othe r drinks into the refrigerator else the bottles may be cracked wit h cold 23 Pull out the plug ...

Page 5: ...t capacity l 213 Defrosting H manual A automatic Fridge Freez H Defrost water outlet Air circulating ventilator Yes Kind of coolant R134a R600a R600a Foaming components C P 3 Technical data Voltage frequency V Hz 220 240 V 50 Input power mains fuse minimum W A 100W 0 5A Temperature range from to Fridge Freez C 0 10 C 18 C 4 Aesthetics Colours see L Top cover White Cabinet White Door Frame White Fa...

Page 6: ...rature ALARM LED acoustic Adjustable thermostat Yes Fast freeze switch Interior light W YES Adjustable feet front rear n front Castors front rear 6 Product dimensions Unit dimensions H W D cm 144 54 7 57 Depth with open door cm 108 Net weight kg 47 0 7 Packing dimensions loadability Packing dimensions H W D cm 148x 57 8 x59 8 Gross weight kg 53 0 8 Recycling s ymbols Carton weight in g kg 5 9 Serv...

Page 7: ...PARTS IDENTIFICATIONS ...

Page 8: ...f Refrigerating Principle 2 Brief Description of System Flow Chart 3 6 series is a direct cooling single system refrigerator which has a freezer compartment When the refrigerator is just powered on the refrigerant flows in the sequence 1 2 3 4 5 ...

Page 9: ...CIRCUIT DIAGRAM CIRCUIT DIAGRAM ...

Page 10: ...MAINTENANCE SERVICE AND TROUBLE SHOOTING ...

Page 11: ... heard distinctly at night 3 The compressor consists of an electric mo tor and a compre ssing apparatus During its normal operation the motor s stator core and windings w ill rise to a temperature in the range of 100 110 and the temperature of the pi ston and cylinder of the compressing mechanism can also reach as above 100 due to the heat produced when compressing refrigerant Most of the heat rad...

Page 12: ...ting that the motor cannot be st arted normally meanwhile a clattering sound can be h eard from inside the start relay which is produce d because the st art contacts cannot be released no rmally A whis tling sound is c aused b y the high pressure gas flowing out of the crack of the pressure tube inside the compressor and clucks are the sound of striking after the suspended spring inside the compre...

Page 13: ...s of its screen has been clogged resulting in an obstructed flowing of refrigerant thus causing a drop in temperature due to throttling d Feel the temperatu re of exhaust gas from the refrigerating system the exhaust gas should b e very hot and this is the n ormal working state For those refrigerator with enclosed type of compressor refrigerating system no frost or dew drop will fr om on the gas s...

Page 14: ... m ain control board is norm al W hether each contact of main control board is norm al T ighten each contact and test machine again Y Trouble of lighting and display system A djust the grade according to fact C om pressor is open circuit or short circuit Inner trouble of com pressor If it is infinite or 0 then the starter is out of w ork H eat protector is out of w ork C apacitance is out of w ork...

Page 15: ...tention to those parts that are liable to leak check main connection points for oil seepage and tubing for cracks If there is no severer leak point charge the system with nitrogen and detect leak points with the commonly adopted method repair them evacuate charge the system with refrigerant and then turn on the refrigerator to make a test run 2 Too much refrigerant charged into the system ANALYSIS...

Page 16: ...d low pressures with pressu re gauges to see whether they are Normal If an abnormal sound comes from the compressor or th e temperature of its Causing is too high Cut the discharge port open and operate the compressor feel it if There is pressure at the discharge port with your finger For a normal compressor its Discharge port is difficult to be blocked with your finger if you just apply a little ...

Page 17: ... 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 evaporator and the refrigerator temperature does not drop down is called no refrigerating There are many causes for this trouble and it is r...

Page 18: ...arge the system with the f iltered refrigera nt Howeve r the commonly adopted method is to connect a filter with moisture absorbers such as silica gel anhydrous calcium chloride to the refrigerating system so as to filter out the moisture from the system then replace the filter evacuate it again and finally charge the system with refrigerant b Clogged with dirt in capillary ANALYSIS OF TROUBLE The...

Page 19: ...stop the compressor at once and if technique is available open the cylinder cover and check up the valve block repair it or replace it with a new one C Sudden stop of Compressor during Its Running The cause of sudden stop of a compressor during its running is mostly that the gas suction pressur e and or discharge pr essure excee d their re spective pr escribed ra nges thus making a pressure operat...

Page 20: ...normally If this cannot be achieved and the stoppage still occurs repeatedly it is most likely that the mechanical parts or contacts are out of order disassemble the thermostat make a thorough checkup and repair it b Overload of electric motor ANALYSIS OF TROUBLE Probably too many things have been put into the refrigerator and hence the thermal load exceeds its refrigerating capacity or in ca se t...

Page 21: ...alue it will be dif ficult to start the motor and a hum sound can be heard from it REMEDY Measure the volt age 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 Check the thermal relay to see whether its contacts are closed ANALYSIS OF TROUBLE Three suspended spring inside the compressor...

Page 22: ... All these will cause poor contact in electricity REMEDY Dismantle it to 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 faul...

Page 23: ... its rated value the thermost at w on t work thus the compressor runs continuous ly When the evapor ation temperature in the system is too high the temperature sensing agent in the temperature sensor is also hotter therefore the thermostat is unable to cut off the power supply to the compressor and stop it REMEDY If it has been found that the refriger ant in the system is insuf ficient in q uantit...

Page 24: ...arts with your hand Test the refrigerator with a test pencil it will light up intensively measure the resistance between the power cord plug and the case b ody with an avometer the r eading will be zero 0 in the worst case the fuse will be blown Check the 3 prong outlet to see whether the live wire and the null line are inversely connected this makes the ground protection lead out from the power c...

Page 25: ...zer poor cooling Display section for freezer appear F4 enclosed bar of freezer gap or broken Maintain technics of sensor Repair the Enclosed bar Check and adjust the circuitry Open the switch of equalize low temperature Conduct user to use it properly Maintain technics of sensor Repair the Enclosed bar Y N Y N Y N Y Y N N Y Y Y Y Y N Y Y N N Y If it抯mechanical refrigerator change the tache of disp...

Page 26: ...Sincere forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China http www haier com ...