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Control logic
Step 2 Protection function description
Stop the compressor to prevent short of oil
running.
Enter condition: Low oil level in VS compressor
detected by oil level sensor.
AND
(t1>TD1, Oil boost duration exceeds TD1 OR
t2<TD2, Interval between two Oil boost is < TD2)
Cancel condition: Manual Reset
Control sequence: Stop VS compressor
•
Reset t1
•
Reset t2
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