Gree GMV5 Series - Page 108

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
105
(2) Description of Functions
1) A2 Refrigerant recovery operation
This function partially recovers refrigerants in a faulty module or IDU pipeline during unit
maintenance. The refrigerant recovery volume of each basic module is as follows:
Model of Basic Module
Maximum Refrigerant Recovery Volume
GMV-72WM/B-F(U)
6.5kg/14.3LBS
GMV-96WM/B-F(U)
11.3kg/24.7LBS
GMV-120WM/B-F(U)
11.8kg/26.0LBS
This function falls into two modes: faulty module refrigerant recovery and IDU pipeline refrigerant
recovery.
Refrigerant Recovery
Mode Code
Refrigerant Recovery
Mode Name
Remark
01
Indoor unit pipeline
refrigerant recovery
This mode is selected when an IDU fails and it is required to recover
refrigerants from the IDU pipeline.
02
Basic module refrigerant
recovery
This mode is selected when a basic module fails and it is required to
recover refrigerants from this basic module.
When this function is enabled, the ODU automatically starts and recovers refrigerants to the ODU or
IDU pipeline.
2) A6 Unit cooling/heating function
This function sets operation modes of the entire unit, including:
Function Mode of ODU
Operation Mode of IDU
Code
Name
nA
Cooling/Heating
Cooling mode, dehumidifying mode, heating mode, and air supply mode.
(Note: The heating mode cannot work with other modes at the same time.)
(factory settings)
nC
Single-cooling
Cooling mode, dehumidifying mode, and air supply mode.
nH
Single-heating
Heating mode and air supply mode.
(Note: The heating mode cannot work with the air supply mode at the same
time.)
nF
Air supply
Air supply mode.
The user or administrator can set operation modes of the ODU based on actual situations to prevent
conflicts.
When it is required to set different refrigerating systems to the same function mode, set the master
system according to the above requirements. For the master system settings, see the "Centralized
Control Address DIP Switch (SA2_Addr-CC)" section.
3) A7 Outdoor silent mode
This function is used when users require lower environment noises, including nighttime automatic
silent mode and forcible silent mode.
For the nighttime automatic silent mode, the system automatically judges the highest daytime
environment temperature and then starts silent operations in a certain interval to guarantee nighttime
low-noise operations. The nighttime automatic silent mode falls into nine categories: