GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 
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If a parameter is invalid for the unit, "00" is displayed.   
On the master unit, press "SW6" to return to the upper level if there are two levels of menu. Press "SW4" 
to quit the query status.   
If  no  button  operations  are  performed  on  the  master  unit  for  five  minutes,  the  function  setting 
automatically quits and the unit restores the current status.   
 
Step 4: In query status, press "SW4" to quit. 
4. Basic Operations for Engineering Commissioning