Samsung AR MRFQ Series User's Manual & Installation Manual page 44

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WARNING
After installing the product, be sure to perform leak
tests on the piping connections.After pumping down
refrigerant to inspect or relocate the outdoor unit, be
sure to stop the compressor and then remove the
connected pipes.
‐ Do not operate the compressor while a valve is
open due to refrigerant leakage from a pipe or an
unconnected or incorrectly connected pipe. Failure
to do so may cause air to flow into the compressor
and too a high pressure to develop inside the
refrigerant circuit, leading to an explosion or
product malfunction.

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