Gree GMV5 Series Service Manual page 89

This function falls into two modes: faulty module refrigerant recovery and IDU pipeline refrigerant
recovery.
Refrigerant Recovery
Mode Code
01
02
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
Code
nA
nC
nH
nF
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:
Silent Mode Code
Mode 1 01
Mode 2 02
Mode 3 03
Mode 4 04
Mode 5 05
Mode 6 06
Mode 7 07
Mode 8 08
Mode 9 09
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Model of Basic Module
GMV-224WM/B-X
GMV-280WM/B-X
GMV-335WM/B-X
GMV-400WM/B-X
GMV-450WM/B-X
Refrigerant Recovery
Mode Name
Basic module refrigerant
recovery
Indoor unit pipeline
refrigerant recovery
Name
Cooling mode, dehumidifying mode, heating mode, and air
supply mode.
Cooling/Heating
(Note: The heating mode cannot work with other modes at the
same time.) (factory settings)
Cooling mode, dehumidifying mode, and air supply mode.
Single-cooling
Heating mode and air supply mode.
Single-heating (Note: The heating mode cannot work with the air supply
mode at the same time.)
Air supply mode.
Air supply
Starting the Silent Mode X Hours
after the Daytime Temperature
Reaches the Highest
6
6
8
8
10
10
4
6
12
Maximum Refrigerant Recovery Volume (kg)
7.5
7.5
8.7
13.5
This mode is selected when a basic module fails and it is required
to recover refrigerants from this basic module.
This mode is selected when an IDU fails and it is required to
recover refrigerants from the IDU pipeline.
Operation Mode of IDU
Stopping the Nighttime Silent
Mode after Continual
Operations for Y Hours
86
Remark
Noise Degree
10
12
8
10 Low-noise mode
8
10
14
Low- and
8
medium-noise mode
superlow-noise
10
mode