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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
CAUTION
READ THIS MANUAL CAREFULLY TO
DIAGNOSE TROUBLE CORRECTLY
BEFORE OFFERING SERVICE.
MODEL:
Haier Group
HRFN-250DAA
HRFN-250DAAS
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Summary of Contents for Haier HRFN-250DAA
- Page 1 CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE CORRECTLY BEFORE OFFERING SERVICE. Refrigerator SERVICE MANUAL MODEL: HRFN-250DAA HRFN-250DAAS 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...
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Page 2: Table Of Contents
CONTENTS 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: Safety Precautions
SAFETY RECAUTIONS 1. Check if there is any leak of current. 2. Cut out the power supply before the repair to avoid an electrical shock hazard. 3. In the case of a live-line test, insulating gloves should be worn to avoid potential electrical shock. 4. - Page 4 -accident. 17. Don’t hook on the door , else the door may be sl anted or the machine may be tipped ove r and inju re people. 18. Don’t place unstable articles on the refrigerator (e.g. weight s and c ontainers with water), else th e weights may hit people and the leaked water may cause leak of current.
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Page 5: Specifications
SPECIFICATIONS REFRIGERATOR Model HRFN-250DAA Photo Commercial brand Haier Product description REFRIGERATOR Type of Appliance (FS= freestanding BI= built-in) Energy efficiency class Climate class (N= + 18-32 °C T=+ 18-43 °C) Freezer compartment / Star rating Key features Gross capacity Total net capacity... - Page 6 Hinged r / reversible (r =right l =left) / reversible) Lock （yes/not） Drawers/ CRISPER: Number n°. Crisper: Salad crisper(s) transparent / white Equipment & Accessories Control Panel: Thermometer interior interior / exterior Control lamps green / yellow / red Over temperature ALARM LED / acoustic Adjustable thermostat Fast freeze switch...
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Page 7: Parts Identifications
PARTS IDENTIFICATIONS... -
Page 8: System Flow Principle
SYSTEM FLOW PRINCIPLE 1. Schematic Diagram of 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 CIRCUIT DIAGRAM... -
Page 10: Maintenance Service And Trouble Shooting
MAINTENANCE SERVICE AND TROUBLE SHOOTING... - Page 11 5.2. Normal Phenomena—Not Troubles for Refrigerators In a domestic refrigerato r, there is n ot only a complicated electric control system, bu t also a refrigerating system that is dif ficult to discern whether it is in a good working conditio n. Both the systems are related a nd af fect each other .
- Page 12 system or the refrigerating system .There is general no troubl e indicating instrument mounted on the domestic refrigerato r ,locations and natures of troubles shou ld be deter mined according to their respective features ,there fore ,exp erience in servicing is very important to troublesho oting .Servic e technicians with rich exp erience can correctly locate them and t ake reasonable r emedy measures based on their compreh ensive analysis of trouble characteristics as well as operating conditions for various kinds of refrigerators .
- Page 13 normal state (it may exceed 90 ℃ in case of running for a longer period of time ). b) After the compressor has operated normally for 5~10 minutes , ouch and 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 .
- Page 14 C o m p re s s o r d o e s n ’ t s ta rt W h e th e r lig h tin g a n d d is p la y s y s te m is T ro u b le o f lig h tin g a n d d is p la y s y s te m n o rm a l W h e th e r th e...
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Page 15: Analysis Of Troubles And Troubleshooting
ANALYSIS OF SERVICE AND TROUBLE SHOOTING Part 6 Analysis of Troubles and Troubleshooting A. Poor Refrigerating Effect The so-called “poo r refri gerating effect “ refers to the fact that the refr igerator can ope rate an d refrigerator normally ,but the temp erature in t he refrigerato r cannot drop to the prescribed valu under the stipulated w orking conditions .In view of there ar e many causes for this phen omenon ,we are going to discuss and analyze it in the following 7 aspects :... - Page 16 filter ,recharge refrigerant after evacuating ,and then seal the harging port . 3) There is air left in the refrigerating system ANALYSIS OF TROUBLE residual air in the refrigerating system will reduce its refrigerating efficiency .The rominent phenomena are the increase in it s gas suction and exhaust pressures however ,the gas exhaust pressure will not exceed its rated value ),obvious in crease in emperature in the segment from the compressor outlet to the condenser inlet .Because here is air in the system ,both the gas exhaust pressure and temperature will rise ,and oreover ,the gas flowing sound is intermittent and obviously louder .
- Page 17 REMEDY It is quite dif ficult to determine whet her this trouble is cause d by the refrigeratin g oil lef t in the evaporator tubing ,b ecause this kind of phe nomenon a nd other severa l trouble a re tends to b e confused .Gener ally spe aking ,you can make a ju dgment based on the frost formed on the evaporator .If the frost does not cover the evap orator , and moreo ver ,it is loosely for med ,you can...
- Page 18 been fou nd ,rep air them or repl ace them with new parts according to spec ific circumst ances ,then evacuate the system and finally charge refrigerant. 2) Refrigerating system has been clogged a) Clogged with Ice ANALYSIS OF TROUBLE The dryness treatment for the major p arts in the refrigerating system has been performe d improperly, the effect of air purging for the whole system is not good ,or the water content in the refrigerant is out of standard ,all these will cause the expansion valve to be clogged with ice .The symptom for this trouble...
- Page 19 longer time, or by the dirt accumulated gradu ally inside the filter . Sometimes, tapping the filter na y 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.
- Page 20 refrigerating ef fect. Furthermore , the gas discharge pressure will exceed i ts normal value when the compressor has run for a period not too long, thus making the protective relay actuate and bring to a stoppage. REMEDY Check up how the air has been lef t in the refrigerat ing system. Generally, there are two possibilities: one is that the air has b een sucked into the system when r epairing due to carelessness, or it has not been purged out totally when evacuating the system;...
- Page 21 step by step, because probably there are many causes, including those electrical and mechanical. 1) Inspect the power supply to see whether it is connected to the compressor circuit. ANALYSIS OF TROUBLE In case the compressor cannot be st arted, this will generally e xhibit in the power supply circuit, for instance, power failure, poor contact of switch, and blown fuse.
- Page 22 contacts to see whether they are closed. If they are still not closed, dismantle the temperature sensing disc and then immerse it into warm water to see w hether the cont acts actuate, if n ot, it can be preliminarily determine that temperature sensing agent has leaked out, and it must be replaced with a new thermostat.
- Page 23 normally, and there are troubles in the refrigerating system or other parts. 1) Temperature is set improperly a) The temperature contr ol knob is set to the “coldest” positio n. This position is to be used for fast freezing or continuous ru nning, it s temperature for pow er of f is too low, therefore, the compressor won’t stop and the temperature in the refrigerator becomes lower and lower .
- Page 24 Electric insulation has deteriorated du e to being af fected with d amp, thus resulting in slight electric leakage. 2) Serious electric leakage Refrigerator case has become live du e to faults o ccurred in some electric devices or the erron eous wiring in installing power cord plug or outlet by the user.
- Page 25 Poor cooling Poor cooling Voltage between Check and adjust the 187V-242V circuitry Adjust grate of thermostat If it抯 mechanical refrigerator, change the tache of display Temperature >30℃ 1—3 grade to overhaul of thermostat 16-30℃ 3—5grate 1.If the compressor starts when switch of fast-freezer is open, it抯...
- Page 26 Sincere forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com...