Gree GMV-72WM/B-U Owner's Manual page 44

GMV DC Inverter VRF
(2) When debugging starts, system will operate according to the ambient temperature.
1) When outdoor temperature is above 20ºC(68°F), debugging shall be in cooling mode.
2) When outdoor temperature is below 20ºC(68°F), debugging shall be in heating mode.
(3) Before debugging, confirm again whether the cut-off valve of each basic module is fully
turned on.
(4) During debugging, front panel of the outdoor unit must be fully closed; otherwise, debugging
accuracy will be affected (see below).
(5) Before debugging, make sure the needed amount of refrigerant has been added to the pipe
or at least 70% of the needed refrigerant has been added.
(6) Description of each stage of debugging progress:
Debugging
——
LED1
Progress
Code
db
db
01_Set up
master unit
db
db
db
02_Allocate
db
addresses
db
db
03_Confirm the
quantity of
modules
db
db
04_Confirm the
quantity of IDUs
db
Description of each stage of debugging progress
Progress code
code
LED2
Display Display
code
status status
Light 01 Light
Light 01 Light
Light 01 Light
Light 01 Light
Light 02 Light
Light 02 Light
Light 02 Light
Light 03 Light
Light 03 Light
Light 04 Light
Light 04 Light
Fig.5.2.2
Status code
LED3
Display
Code
status
A0 Light System is not debugged.
Light System doesn't have master unit. Reset
CC
master unit.
Light More than 2 master units are set. Reset
CF
master unit.
Light Master unit is successfully set. Start
OC
next progress.
Ad Blink System is allocating addresses.
Master IDU is not set. Please set master
L7 Blink IDU. If it's not set in 1min, system will
set the master IDU randomly.
Allocation is finished. Start next
OC Light
progress.
LED3 displays the quantity of modules.
01~04 Blink
Confirm the number manually.
System has confirmed the quantity of
OC Light
modules. Start next progress.
LED3 displays the quantity of IDUs.
01~80 Blink
Confirm the number manually.
System has confirmed the quantity of
OC Light
IDUs. Start next progress.
40
Meaning