COMPRESSOR CHANGE OUT PROCEDURE – Trane Commercial HVAC Help Center

Once Compressor has been Deemed failed.
Pressing the K1 Button 11 times at the outdoor unit, this is vacuuming all mode.
You should see K - 4- Blank - A at the outdoor unit display.
for Heat recovery systems, model numbers (4TVR) this should open all valves in the system, including MCU And EEV'S.
Heat Pump systems Model numbers (4TVH) this should only open valves in the outdoor unit and indoor EEV'S.
This should allow refrigerant to be recovered.
Attached is an Official Samsung compressor change out document.

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