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Refrigerator
SERVICE MANUAL
Features:
1. Mechanical temperature control
2. Front positioned adjustable thermostat
3.100% HFC free and FCKW free
4. External condenser and adjustable feet
5. Reversible door with magnetic seal
6. Crystal crisper drawers
CAUTION
READ THIS MANUAL CAREFULLY TO
DIAGNOSE TROUBLE CORRECTLY
BEFORE OFFERING SERVICE.
Haier Group
MODEL: HFH-50
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Summary of Contents for Haier HFH-50
- Page 1 CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE CORRECTLY BEFORE OFFERING SERVICE. Refrigerator SERVICE MANUAL MODEL: HFH-50 Features: 1. Mechanical temperature control 2. Front positioned adjustable thermostat 3.100% HFC free and FCKW free 4. External condenser and adjustable feet 5. Reversible door with magnetic seal 6.
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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 PRECAUTIONS 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 slanted or the machine may be tipped over and injure people. 18. Don’t place unstable articles on the refrigerator (e.g. weights and containers with water), else the weights may hit people and the leaked water may cause leak of current. 19.
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Page 5: Specifications
SPECIFICATIONS Upright Freezer Model HFH-50 Photo Commercial brand Haier Product description Freezer 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... - Page 6 Number n°. Crisper: Salad crisper(s) transparent / white Equipment & Accessories Control Panel: Thermometer interior / exterior Interior Control lamps green / yellow / red Over temperature ALARM LED / acoustic Adjustable thermostat Fast freeze switch Interior light Adjustable feet front / rear n°...
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Page 7: Parts Identifications
PARTS IDENTIFICATIONS 1. Work surface/cover plate 2. temperature controller 3. Freezing compartment 4.Storage element 5. Door of freezer compartment 6. Compressor 7. Defrost water collection tray... -
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, 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 refrigerator, there is not only a complicated electric control system, but also a refrigerating system that is difficult to discern whether it is in a good working condition. Both the systems are related and affect each other. If a certain part of a refrigerator works abnormally .Its refrigerating efficiency will decrease ,operation properties will become unstable ,or even it cannot be used normally for those serious cases.
- Page 12 system or the refrigerating system .There is general no trouble indicating instrument mounted 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 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 “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 there are many causes for this phenomenon ,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 its gas suction and exhaust pressures however ,the gas exhaust pressure will not exceed its rated value ),obvious increase 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 difficult to determine whether this trouble is caused by the refrigerating oil left in the evaporator tubing ,because this kind of phenomenon and other several trouble are tends to be confused .Generally speaking ,you can make a judgment based on the frost formed on the evaporator .If the frost does not cover the evaporator , and moreover ,it is loosely formed ,you can make a judgment that the deterioration of refrigerating effect is due to the accumulation of refrigerating oil left in the evaporator tubing in case no other troubles have been found .
- Page 18 been found ,repair them or replace them with new parts according to specific circumstances ,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 parts in the refrigerating system has been performed 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 are as follows :the refrigerator sometimes can refrigerate and sometimes cannot :the refrigerator...
- Page 19 longer time, or by the dirt accumulated gradually inside the filter. Sometimes, tapping 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.
- Page 20 refrigerating effect. Furthermore, the gas discharge pressure will exceed its 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 left in the refrigerating system. Generally, there are two possibilities: one is that the air has been sucked into the system when repairing 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 started, this will generally exhibit 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 whether the contacts actuate, if not, 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 control knob is set to the “coldest” position. This position is to be used for fast freezing or continuous running, its temperature for power off 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 due to being affected with damp, thus resulting in slight electric leakage. 2) Serious electric leakage Refrigerator case has become live due to faults occurred in some electric devices or the erroneous wiring in installing power cord plug or outlet by the user. This is very dangerous. 3) Electric leakage test a) Slight electric leakage A tingle sense will be experienced as soon as you touch the metal parts of the refrigerator with your...
- 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...