Samsung mini DVM Series Service Manual page 325

Reference Information
3) After 3 minutes, close the high pressure valve in the
order of the farthest outdoor unit from the digital
outdoor unit.
4) Convert to the view mode by the K4 key
2) If the number on the Display is 4020,
start to lock the low pressure valve.
If it reaches 4000, finish it.
5) Stop the outdoor unit operation by pressing the
2) K3 key once.
13-2
1 2 3 4
Sub3 Sub2 Sub1 Main
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