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has operation for vrv 4 set 1 turn on the power supply to all the outdoor units and indoor unit the display s e-g 1 2 s e-g 3 on the outer unique control printed circuit board will begin flashing to protect the compressors make sure that the outdoor unit have been powered on for at least 6 hours before the start operation where no abnormality is detected the display s e-g 1 2 s e-g 3 on the outdoor unit control printed circuit board will change from blinking to light up after approximately 10 minutes or more step 2 once the display light is off press and hold button bs2 for more than 5 seconds or more the display will change from light off to to1 and the test operation will begin the test operation will take approximately 30 minutes to one hour to complete when the test operation is completed the light on on the display will turn off we have come to an end thank you for viewing this video