Haier 102102429 Service Manual - page 24

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caused by dirt , tapping the suspicious clogged point (generally in the 

capillary or the connection joint of the filter) may cause the refrigerant to 

flow through partially, resulting in some corresponding change, whereas in 

that case if you heat it with a hot towel, no reaction will happen, no flowing 

sound can be heard, moreover, there is no periodic change. After rejecting 

the possibility of ice clogging, it can be generally considered as the 

clogging due to dirt . 

Remedy   

Dismantle the system, remove the dry filter from it, purge the tubing with 

nitrogen, install a new filter, then evacuate it and finally charge it with 

refrigerant.  

C) Clogging in filter 

Analysis of Trouble 

Total clogging of a filter is rarely to occur. This trouble is mostly caused 

by the paste-like matter formed from the substances filled into the system 

or other dust after the refrigerator has been used for a 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. 

3) Troubles of Compressor 

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 trouble from others because they 

often have similar symptoms. In repairing, firstly, hear attentively if there is 

some abnormal sound coming from the compressor (sometimes , the 

broken pieces of valve block may strike against the cylinder), and feel the 

compressor casing with your hand to ascertain whether it is too hot, this is 

also helpful to the troubleshooting; 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 is very high, whereas when the 

gas discharge valve block is broken , the discharge pressure gauge pointer 

will swing drastically and the discharge pressure is very high. In the both 

cases, 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   

Maintenance Service and Trouble Shooting