GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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and the wired controller of each IDU displays
“A0”, it indicates that the unit is in non-commissioning
status.
Step 6: Find the module with its address being
“01”, which is the master unit. On the master unit,
press and hold "SW7" for more than five seconds to enter unit commissioning.
Step 7: Wait for the unit to automatically operate commissioning steps 01 and 02.
Exception 1: If the master unit is incorrectly set in step 01, the following faults are displayed in step
01:
Commissioning Code
Progress Code
Status Code
Meaning
Progress
LED1
LED2
LED3
Code Display Status Code Display Status Code Display Status
01_Master
unit settings
db
On
01
On
CC
On
The system does not set any master
unit, and a master unit should be set.
db
On
01
On
CF
On
The system sets more than two master
units, and a master unit should be set
again.
db
On
01
On
OC
On
The system successfully sets a
master unit and automatically enters
the next step.
According to the above fault symptoms, set the master unit again by referring to the setting method
in the "Master Unit Setting DIP Switch (SA8_MASTER-S)" section. Then enter unit commissioning
again.
Exception 2: If no master IDU is detected in step 02, the following faults are displayed in step 02:
LED1
LED2
LED3
Function Code
Display Mode
Current Progress
Display Mode
Current Status
Display Mode
db
On
02
On
L7
Blinking
In this case, all buttons are invalid. Users can set the master IDU through the commissioning
software, wired controller, or commissioning remote controller within one minute. If no master IDU is set
within one minute, the system will automatically set a master IDU. Then the system automatically enters
the next step.
Step 8: When the unit runs to step 03, users need to manually confirm the number of outdoor
modules. The main board of each module is displayed as follows:
Commissioning Code
Progress Code
Status Code
Progress
LED1
LED2
LED3
Code
Display Status
Code
Display Status
Code
Display Status
03_Module quantity
confirmation
db
On
03
On
Module quantity
Blinking
If the displayed quantity is consistent with the number of actually connected modules, press "SW7"
