Gree GMV-VQ680WM/C-X Service Manual page 56

Gree
function setting status.
The default status is 00, that is, no silence.
4.1.2.3.4 A8 After-Sales Vacuum Pumping Mode
Introduction:
This function is used to ensure the vacuum of the entire system during maintenance and to avoid
dead pipeline zones. When this function is set, both the expansion valve and the solenoid valve of the
unit will open.
Setting steps:
Step 1: Enter A8 after-sales vacuum pumping mode, and ensure that the master module displays
as follows:
LED1
Function code Display status
A8
The system enters the to-be-confirmed status of vacuum pumping mode.
Step 2: Press the SW3 button. The system enters the confirmed status of vacuum pumping mode
and all modules display as follows:
LED1
Function code Display status
A8
At this time, the expansion valves of all indoor and outdoor units are open, and the entire system
cannot be started.
When you press the SW4 back button on the master unit for over 5 seconds or the vacuum pumping
status remains for 24 hours, the entire system exits the status.
4.1.2.3.5 n0 Auto Energy Saving
Introduction:
This function sets the user-required energy saving mode. The default mode is capability priority
control.
After energy saving mode is set, the system capability will deteriorate.
Code
01
02
Setting steps:
Step 1: Enter n0 system energy saving operation, and ensure that the master unit displays as
follows:
LED1
Function code Display status
n0
Step 2: Press the SW1 up button and the SW2 down button to select the corresponding mode.
Current process
On 00
Current process
On 00
Capability priority control (default setting)
Current
process/mode
On 01
GMV6 HR DC Inverter VRF Units Service Manual
LED2
Display status Current status
Blinks
LED2
Display status Current status
On
Function Name
Energy saving priority control
LED2
Display status Current status
Blinks
54
LED3
Display status
OC Blinks
LED3
Display status
OC On
LED3
Display status
OC Blinks