GREE                                                                        GMV5E DC INVERTER VRF UNITS SERVICE MANUAL 
    83   
Starting the Silent Mode X Hours 
after the Daytime Temperature 
Reaches the Highest 
Stopping the Nighttime 
Silent Mode after Continual 
Operations for Y Hours 
Low- and 
medium-noise mode 
Note:
 The highest daytime temperature is generally in 13:00-15:00.   
For  the  forcible  silent  mode,  the  system  runs  in  low-noise  mode  no  matter  in  the  daytime  or 
nighttime. The forcible silent mode falls in three categories: 
Low- and medium-noise mode 
Note: 
The system capacity may fall off after the silent mode is set. Therefore, try to balance the 
noise with the capacity in selecting a silent mode category. 
The factory setting is “00”. 
(4) A8 Aftersales vacuuming mode 
This  function  ensures  the  vacuum  degree  of  the  entire  system  during  maintenance  to  prevent 
operation  functions  of  dead zones.  Expansion  valves  and electromagnetic  valves  of the  unit  will be 
enabled after this function is set. 
(5) n0 Conservation control 1 
System conservation is set when conservation operations are required. The default factory setting is 
capacity priority control mode. The system capacity may fall off after the conservation mode is set. 
Conservation control – invalid (factory settings) 
Conservation control - valid 
(6) n3 Forcible defrosting operation 
This function is set when forcible defrosting is required for the unit during maintenance. After this 
function is enabled, the system automatically quits based on quitting conditions and then automatically 
runs based on system conditions.   
(7) n4 Conservation control 2 
The highest capacity output limitation is set when users require forcibly limiting the system power 
consumption. The setting scope is as follows: 
Note: The cooling or heating effect may fall off after the capacity limitation is set. 
(8) n5 Indoor unit project number offset 
This function sets the IDU project number when multiple refrigerating systems are controlled in a 
centralized  manner  (by using  a remote  monitor or  centralized controller),  avoiding  the  same  project 
number between different systems. If the project number is not set, project number conflicts may occur