Gree GMV5 Series Service Manual page 119

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Step 18: If no exception occurs when the unit continuously operates for 40 minutes, the system
automatically confirms commissioning completion, stops the entire unit, and restores the standby status.
The main board is displayed as follows:
Commissioning
Progress
Code
17_Commissioning
completion status
01~04
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
On 16 On
Code Progress Code
LED1 LED2
Display Display
Status Code
On OF
XXXX/U8
Status Code
LED3
Display
Status Code Status
On OF
116
The system detects pipe
failure of IDU. "XXXX"
indicates the project
number of the faulty IDU.
The fault code "U8" is
displayed after three
seconds. For example, if a
U8 fault occurs on IDU
100, LED3 will circularly
display "01", "00" (two
seconds later), and "U8"
On (two seconds later).
Meaning
The unit has completed
commissioning and in
standby status. LED1
displays the module
address; LED2 and LED3
On display "OF".