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Haier HRF-349AA, Service Manual

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Haier HRF-349AA Service Manual Download Page 11

1 0

Program Diagram 

 

Start 

T>Ts 

Read T 

Stop 

Read T 

 

T>Ts 

Ts+Td>t>Ts 

Ts+Td+2t>T>Ts+Td+t 

Ts+Td+2t>T>Ts+Td+t 

Ts+Td+mt>T>Ts+Td+(m-1)t 

N=Nmax 

 

Ts+Td>t>Ts 

Ts+Td+t>T>Ts+Td 

N=N

max

 

Y 

Y 

N 

Stop 

N>N2 

N>N3 

N=N1 

N=N

max-1

 

N>N4 

N=N2 

N=N3 

N>Nmax-

1

 

T    ---- Factual Temperature 
Ts ----- Enactment Temperature 
Td----- No~Off Extent 
t ------ Temperature Increment 
N-----    Compressor Rotate Speed 
N

1

< N

2

< N

3

< 

……

..< N

max

 

 

Program Diagram 

 

Summary of Contents for HRF-349AA

Page 1: ... Manual Features l A energy l Automatic controlling temperature l Three cooling system l Bright VFD display Haier Group Serial number ER03SM0415 01 Version number 00 00 Edition 2003 04 15 Models HRF 329AA HRF 349AA HRF 369AA ...

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 Program Diagram 10 9 Maintenance Service and Trouble Shooting 11 CONTENT ...

Page 3: ...roduct code illumination and Series Introduction H R F 369 AA Haier product Refrigerator Freezer Gross capacity according to export country standard series Product code illumination and Series Introduction ...

Page 4: ...220 240 50 Rated Input Power W 130 130 130 Power Consumption kW h 24h 0 62 0 65 0 68 Net Weight kg 72 74 86 Gross Weight kg 96 96 97 Unit Dimension D W H mm 660 600 1652 660 600 1672 660 600 1872 Packing Dimension D W H mm 833 740 1719 833 740 1719 833 740 1800 Container Quantity 40 PCS 42 42 42 Container Quantity 40 HC PCS 42 42 42 Specifications ...

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

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

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

Page 8: ...7 Parts and Functions Parts and Functions ...

Page 9: ...riation of ambient temperature Unique inverter operation The refrigerator can be set automatically for low speed and low noise operation at night 4 Energy efficiency Thick heat insulation is used to minimize temperature gain and to optimize the cooling system for the most efficient cooling result 5 VFD display Application of VFD technology for display of the refrigerator operation status and tempe...

Page 10: ...en the refrigerator is just powered on the refrigerant flows through the adjust temperature compartment evaporators and freezer compartment evaporators After the adjust temperature compartment temperature has reached the required value the solenoid valve is energized thus cause the refrigerant to flow through the Refrigerator Compartment evaporators freezer compartment evaporators or soft freezer ...

Page 11: ... Ts Td 2t T Ts Td t Ts Td mt T Ts Td m 1 t N Nmax Ts Td t Ts Ts Td t T Ts Td N Nmax Y Y N Stop N N2 N N3 N N1 N Nmax 1 N N4 N N2 N N3 N Nmax 1 T Factual Temperature Ts Enactment Temperature Td No Off Extent t Temperature Increment N Compressor Rotate Speed N1 N2 N3 Nmax Program Diagram ...

Page 12: ...ES If compressor can run naturally and temperature raising of condenser is very low YES NO No cooling If compressor can run after it stop to run five minutes and give power NO When charging refrigerant we must notice to make refrigerant true Refrigerant leak check and repair charge refrigerant again Check and repair according to the section of the compessor doesn t work ...

Page 13: ...es or there are more fresh food inside Check and repair the main control panel NO Is cooling capacity insufficient YES YES NO Comprossor doesn t stop Does the refrigerator refrgerate NO Adjust and instruct consumer how to use NO Check and repair according to the section of Cooling capacity is insuffcient Check and repair according to the section of No cooling Maintenance Service and Trouble Shooti...

Page 14: ...nt YES Repair Does the refrigerant leak siowly NO Is the ambient temperature low than 16 YES Adjust and instruct consumer how to use Check the therostat is correct Cooling capacity is insufficient Maintenance Service and Trouble Shooting ...

Page 15: ... panel Does the compressor has 220V power output Check and repair compressor and accessory YES YES NO Check all cords and power cords Is the ambient temperature low than 16 Does the refrigerated room lamp illuminate when the door is opened The compressor doesn t work YES NO YES YES NO Repair Adjust and instruct consumer how to use NO Maintenance Service and Trouble Shooting ...

Page 16: ... 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 slight and uniform sound...

Page 17: ...roubles 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 various kinds of refrigerators Three Essentials for Check...

Page 18: ...ng 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 the filter or capillary has been clogged 3 Touch and Feel a Feel th...

Page 19: ...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 refrigerator cannot drop to the prescribed value under the stipulated working conditions In view of ...

Page 20: ...e 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 the condition is severe foams will fill all over inside the compressor housing and be sucked by the piston causing damage to the...

Page 21: ...he 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 the temperature in the refrigerator cannot drop down to the prescribed range Remedy Turn the refrigerator off and make preparations for defrosting open the refrigerator door to let the air come in or use a fan to...

Page 22: ...efrigerating 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 relatively complicated too In servicing special attention to finding direct causes for this phenomenon Three main potential causes for this trouble ...

Page 23: ...tently sometimes the refrigerator works well and sometimes not well In order to determine whether it is clogged with ice heat the suspicious points with hot water to make ice melt and after a while if a gas flowing sound resulting from an abrupt gush is heard and the gas suction pressure rises as well it can be confirmed that the trouble is caused by ice clogging Remedy If there is too much moistu...

Page 24: ...sor 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 discharge valve to suck and discharge the refrigerant If the valve block is broken the refrigerant can not be discharged and hence no refrigerating can be achieved Method for making judgement It is quite difficult to differentiate this troub...

Page 25: ...em 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 when you feel it with your hand and poorer refrigerating effect Furthermore the gas discharge pressure will exceed its normal value when the compressor has run for a period not to...

Page 26: ...on Analysis of Trouble The compressor current is within its normal range but the thermal protector actuates repeatedly Remedy Replace the thermal protector with a new one 3 Sudden stoppage due to other causes Normal Stoppage Start and stop of the compressor is generally controlled by a thermostat When the temperature in the refrigerator reaches its desired value the thermostat will shut down the c...

Page 27: ... 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 The contacts of thermal relay sometimes may be open due to the leakage of temperature sensing agent from the temperature sensor Remedy Remove the relay cover to check up its contacts if they are open this means that the original setting is not properly ...

Page 28: ...ch ad insufficient quantity of lubricant clogging in the lubricant oil line or intermittent lubricant oil supply Dirt and other impurities in the lubricant oil will increase its viscosity and cause the shaft to be seized Copper plating may also result in seizing of shaft b Seizing of piston This is caused by too small fit clearance between the piston and cylinder or expansion due to heat Judgement...

Page 29: ... thus the compressor runs continuously When the evaporation 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 refrigerant in the system is insufficient in quantity recharge it with refrigerant In case clogging o...

Page 30: ... between the power cord plug and the case body with an avometer the reading will be zero 0Ω 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 cord plug being connected to the live wire Another possibility is that the live wire and null line of the outdoor ...

Page 31: ... 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 the compressor strike different locations on the side surface of its case using a rubber hammer or hand hammer with a wood block in between so as to determine whether the suspended springs are out of balance or being seized Maintenance Service and Troubl...

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