30
Heavy Repair Method of Refrigerator by Application of Refrigerant
2-9. Cautions in Heavy Repair Service
Special caution should be taken since fire may occur for welding work since refrigerant may remain as it is at the high
pressure side even after vacuum air-discharge in relation with cycle clogging. Take power cords out and remove power
between 6sec - 12sec after powering on in order to open both sides of 3way valve in the step of refrigerant recovery. If both
sides of 3way valve will not be opened, fire may occur during welding work since refrigerant may remain during the cycle. To
prevent moisture clogging, always replace dryer together during heavy repair of refrigerator.
2-9-1. 3-Way Valve Service
■
Since 3-way valve controls refrigerant with an inner plastic
damper, defect may occur because the plastic damper is
deteriorated and welding heat is delivered to a pipe during
welding for repair and replacement of the valve welding
part.
So perform service in following service method.
1) Replace 3wasy valve ASSY where refrigerant leakage
occurs at the joint pipe (
ⓐ
,
ⓑ
,
ⓒ
part) connected with the
service valve of valve welding part.
(For unavoidable welding, wrap the body part of valve with
a water towel so that delivery of welding heat is minimized
(100
ⅰ
or less).
2) Service in replacement of valve (valve failure) Perform
service in the same method as above.
3) Other cautions
(1)Pipe for capillary tube should be welded through insertion by 20+3-3mm. (For preventing clogging during welding)
(2)Take care since inner ejecting objects may be damaged if falling a valve or giving a strong shock.(Poor operation and
leakage quantity may be increased due to damage of inner parts.)
(3) Entirely remove and check ice formation which occurred in Eva before or after improvement work for non-insertion of
3-way valve housing, defect or shortage of goods, defective welding.
Dryer side
Body
F-Room
R-Room <Sky-blue>