User Manual

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WARNING
To avoid risk of electrical shock that can cause death or severe personal injury,
disconnect unit from power before servicing unless tests require power.
10. Cooling Cycle Heavy Repair
10-2. Precautions During Heavy Repair
Items Precautions
Use of tools Use special parts and tools for R-134a or R-600a
Removal of retained
refrigerant.
1) Input ‘Foced Comp On Mode’ at Control Panel.
Trun off a refrigerator after 10 Minutes to open STEP VALVE.
- Water Filter + Ice Maker + Dorr Alarm 5 time
2) Remove retained refrigerant more than 5 minutes after turning off a refrigerator.
(If not, oil will leak inside.)
3) Remove retained refrigerant by cutting first high pressure side (dryer part) with a nipper
and then cut low pressure side. (If the order is not observed, oil leak will happen.)
Replacement of
dryer
Be sure to replace dryer when repairing pipes and injecting refrigerant.
Nitrogen blowing
welding
Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe.
(Nitrogen pressure : 0.1~0.2 kg/cm2.)
Others
1) Nitrogen only should be used when cleaning inside of cycle pipes inside and sealing.
2) Check leakage with an electronic leakage tester.
3) Be sure to use a pipe cutter when cutting pipes.
4) Be careful not the water let intrude into the inside of the cycle.