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Haier HTE21W, Service Manual

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Haier HTE21W Service Manual Download Page 23

 

23

Remedy

 

Dismantle the system. Remove the dry filter and purge the tubing with 

nitrogen. Next, install a new filter. Then evacuate it and fill with refrigerant. 

 

 
 

4) 

Clogged Filter

 

 

Analysis of Problem 

The complete clogging of the filter rarely occurs. Oftentimes, there is an 

accumulation of paste-like matter formed from dust on the filter. Tapping the 

filter may remove part of the paste-like matter. When the filter is clogged, it will 
be cooler than normal. 

 

Remedy 

The same as described for the capillary clogged with dirt. 

 

 
Compressor Problems 
 

1) Broken Gas Suction And Discharge Valve Blocks 

 

Analysis of Problem 

The compressor works by opening and closing the gas suction valve and 

discharge valve to suck and discharge the refrigerant. If the valve block is 
broken, the refrigerant cannot be discharged. This prevents refrigeration. 

 

Remedy 

It is quite difficult to differentiate this trouble from others because they have 

similar symptoms. When repairing, listen attentively for abnormal sounds coming 
from the compressor. Oftentimes, broken pieces of valve block strike against the 

cylinder. Check to see if the compressor casing is too hot. Secondly, measure the 
pressures at the high and low-pressure ports of the compressor with pressure 

gauges. If the gas suction valve block is broken, the suction pressure gauge 
pointer will swing violently and the suction pressure will be very high. Whereas 

when the gas discharge valve block is broken, the discharge pressure gauge 
pointer will swing drastically and the discharge pressure will be very high. In both 
cases, stop the compressor at once. If possible, open the cylinder cover, check 

the valve block, and repair it. 

 

 

Compressor suddenly stops 
 

Very often, when the compressor suddenly stops, the gas suction pressure and/or 
discharge pressure have exceeded their respective prescribed ranges. When this 

happens, the pressure-operated protective relay automatically shuts off the power 
to the compressor. Below we discuss the reasons for high gas discharge pressure 
and low suction pressure. 

 
 

 

Stoppage due to excessively high gas discharge pressure 

 
1) High gas discharge pressure due to excess refrigerant  

Summary of Contents for HTE21W

Page 1: ...HAIER REFRIGERATOR Service Manual PART RF 8888 38 HAIER AMERICA TRADING LLC www haieramerica com ...

Page 2: ...ts Contents 2 Product Code Explanation And Series Introduction 3 Specification 4 Safety Precautions 5 Parts And Functions 9 Function Schedule 10 System Flow Chart 11 Circuit Diagram 12 Maintenance And Troubleshooting 13 ...

Page 3: ...3 Product Code Explanation And Series Introduction ...

Page 4: ... QQ biscuit SS stainless steel Power Supply V Hz 115 60 115 60 Rated Input Power W Power Consumption kW h 24h 1 40 1 40 Net Weight lbs 247 247 Gross Weight lbs 265 265 Unit Dimension D W H inch 33 x 31 x 65 7 8 33 x 31 x 65 7 8 Packing Dimension inch D W H 35 x 34 7 16 x 66 7 32 35 x 34 7 16 x 66 7 32 Container Quantity 40 HC PCS 42 42 ...

Page 5: ... grounding outlet Power cable is filed with three core grounding plugs complying with three core grounding outlet In no case should the third plug pin grounding of the power cable be removed WARNING Do not damage power cable Be sure not to unplug unit by power cable Hold plug firmly to unplug Do not let the body of the unit have contact or press power cable Take care of power cables to avoid damag...

Page 6: ...ons 1 Unplug unit prior to cleaning or repairing 2 Unplug unit before replacing damaged Lamp to prevent electrical shock WARNING It is not advisable or prohibited to keep hazardous inflammable or explosive items like acid or alkali into refrigerators WARNING Do not keep medicine vaccines or chemical reagents in refrigerator This refrigerator is household use and cannot store items with strict temp...

Page 7: ...her flammable substances in the vicinity of the refrigerator to avoid fire outbreak WARNING Do not play with the door to avoid damage WARNING Do not keep heavy objects on refrigerator WARNING Do not touch refrigerator with your wet hands when it is in operation to avoid your hand form getting stuck to the freezer WARNING Do not spray water onto the unit or install unit at a wet place to avoid inte...

Page 8: ...rator gets damaged WARNING Do not keep bottled items in the freezer compartment to avoid frost crack WARNING Unplug power supply when carrying out cleaning Switch power on 5 minutes after to prevent any damage WARNING Dismantle door and door gasket before disposing off a refrigerator to avoid damag unsuspecting persons or children ...

Page 9: ...ption of Components 1 Ice Making Ware 2 Ice Storage Box 3 Wire Shelf 4 Refrigerator Lamp 5 Snack Ware 6 Cantilever Shelf 7 Humidity Adjusting Slide 8 Door Rack 9 Egg Tray 10 Bottle Rack 11 Tall Bottle Rack 12 Humidity Maintaining Box ...

Page 10: ...tic defrosting 2 Round door design and fashion handles 3 Energy saving 4 Adjustable humidity crisper 5 Isolated food shelf 6 Crisper with adjustable moisture Moisture in the crisper can be adjusted for satisfaction of vegetables and fruits storage ...

Page 11: ...11 System Flow Chart 1 Schematic Diagram Of System Flow Chart 1 Compressor 2 Condenser 3 Dry Filter 4 Capillary Tube 5 Evaporator 6 Air Fan 2 Cold Air Flow ...

Page 12: ...frigerators with two doors A mechanical type of all the control is generally adopted The thermostat directly controls the start and stop of compressor and hence the refrigerator temperature Low Temperature Compensation in the above schematic diagram When the ambient is below the set temperature the switch will be closed and the heating will work thus ensuring the normal start and operation of refr...

Page 13: ...5 whiles in an upright position Overload Protector Check for continuity between terminals 1 and 3 YES YES YES YES Starting Relay In upside an down position check for continuity between terminal 2 and 6 YES Electrolytic capacitor at 115V No continuity between terminals If normal resistance drops to 0 temporarily then rises to infinity YES NO NO NO NO NO Compressor Motor lock Inter lay short of moto...

Page 14: ...mperature it should be closed Bimetal Thermostat Check for the continuity between BROWN and WHITE lead wires At room temperature it should be closed D Check for the continuity between RED and WHITE lead wires The Freezer And Refrigerator Rooms Are Not Sufficiently Cold Check Point Indication Cause Of Trouble Instruction Diagnosis Does the processor operate Is refrigerator installation distant from...

Page 15: ...ll foreign material or frost Replace the motor Has the fan motor coil short circuited Replace the fan motor Is there heavy frost or ice accumulated to the evaporator Defrost Control is faulty Replace Defrost Timer Does evaporator get cold when the f thermostat is by passed F Thermostat is Faulty Replace the F Thermostat Is the evaporator cooled only partially after operating for more than 30 minut...

Page 16: ...rtly after the compressor has stopped running This sound therefore does not constitute a problem b Clicking Noises Refrigerators often make clicking noises This is also normal It is the result of the intake or release of the armature of a current dead weight start relay when the compressor is started The compressor motor makes a clicking sound while it is running This sound is faint in the daytime...

Page 17: ...g to their respective features Experience in servicing is very important for troubleshooting Well experienced service technicians can correctly identify and solve problems based on their comprehensive analysis of the characteristics of the particular problems as well as the operating conditions for various kinds of refrigerators Three Essential Things To Note During A Checkup Look a Check the tubi...

Page 18: ...od b After the compressor has operated for 5 10 minutes feel the condenser The temperature of its upper part should be higher than that of its lower part or its right part is hotter than its left part depending on the type of condenser coil This indicates that the refrigerant is circulating properly If the condenser is not hot then the refrigerant is leaking If the condenser is hot for only a few ...

Page 19: ...ems detecting the leak points charge the system with nitrogen to help identify leaks Drain the system of the nitrogen before refill with refrigerant 2 Too much refrigerant in the system Analysis of Problem a If amount of refrigerant in the system exceeds its nominal capacity the excess refrigerant will displace the evaporator This will reduce the heat dissipation area and decrease the refrigeratin...

Page 20: ...een is use for a long time Remedy Measure the high and low pressures with pressure gauges to see whether they are normal If an abnormal sound comes from the compressor or the temperature of its causing is too high cut the discharge port open and operate the compressor Inspect to see if there is pressure at the discharge port with your finger In a normal compressor it is difficult block the dischar...

Page 21: ...n meshes become clogged by dirt This results in a decrease in flow rate and a poor refrigerating effect The effects of clogged filters included decrease of gas discharge pressure the drop in the temperature of discharged gas and for severe cases condensation and frosting may appear Remedy Purge the tubing After replacing the dry filter or cleaning it thoroughly refill the system with refrigerant a...

Page 22: ...omena will appear intermittently In order to know whether the system is clogged with ice heat the parts that are suspected with hot water If the sound of gas flowing is heard and the gas suction pressure rises the trouble is that the system is clogged by ice Remedy If there is too much moisture in the refrigerating system release the refrigerant purge the tubing with nitrogen and then refill the s...

Page 23: ... for abnormal sounds coming from the compressor Oftentimes broken pieces of valve block strike against the cylinder Check to see if the compressor casing is too hot Secondly measure the pressures at the high and low pressure ports of the compressor with pressure gauges If the gas suction valve block is broken the suction pressure gauge pointer will swing violently and the suction pressure will be ...

Page 24: ...ly there are three possibilities First is that the air has been sucked into the system during repairs due to carelessness Secondly it has not been completely purged evacuating the system The third possibility is that there are leak points at the low pressure end of the refrigerating system Leak points appear in low temperature parts or assemblies This is because the evaporation temperature is lowe...

Page 25: ...toppage due to other causes Normal Stoppage Thermostat generally controls start and stop of the compressor When the temperature in the refrigerator reaches its desired value the thermostat will shut down the compressor automatically Never take this normal operation as a problem care should be taken to differentiate it from other real problems in servicing Compressor won t start In case the compres...

Page 26: ... 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 to step up the voltage thus normal operation can be achieved C Check The Thermal Relay To See Whether Its Contacts Are Closed Analysis of Problem The cont...

Page 27: ...e motor is damaged repair or replaced it with a new one ii Control Relay Is Faulty Analysis of Problem Overheating burns or wearing of control relay contacts will generally occur if this is true All these will cause poor contact in electricity Remedy Dismantle it for repairs or replace it with a new one iii Poor Electric Contractor In Thermostat Analysis of Problem Damaged contractor and leakage o...

Page 28: ... check the temperature control knob to see whether it is set in the position coldest b Thermostat Is Malfunctioning And Makes The Compressor Running Continuously Analysis of Problem When the thermostat does not work normally it will make the compressor run continuously and hence very low temperature will be achieved in the refrigerator The fault is generally because the contacts of the thermostat ...

Page 29: ...ture poorer ventilation and heat dissipation make the compressor run without stopping Electric Leakage Of Refrigerator a Slight Electric Leakage Electric insulation has deteriorated due to being affected with damp thus resulting in slight electric leakage b Serious Electric Leakage Refrigerator case has become live due to faults occurred in some electric devices or the erroneous wiring in installi...

Page 30: ...l ground 2 Abnormal Noise From Compressor Three suspended spring inside the compressor case are out of balance and strike against the case moreover the wear of compressor parts may cause noise sometimes 3 Resonance Of Tubing And Loosening Of Parts Improper and compact lying of tubes or the loosening of parts may cause Vibration 4 Inspection Method To find the sources of noise press the vibration s...

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