Gree GMV5 Series Service Manual page 114

If the displayed quantity is inconsistent with the number of actually connected modules, check whether
communication cables are correctly connected between modules in power-off status. Then perform
commissioning again.
Note: It is very important to correctly confirm the number of ODUs. If the confirmed quantity is
inconsistent with the actual quantity, the system may improperly run.
Step 8: When the unit runs to step 04, users need to manually confirm the number of indoor modules.
The main board of each module is displayed as follows:
Progress
04_Indoor unit
quantity
confirmation
If the displayed quantity is consistent with the number of actually connected modules, press "SW7" on
the master unit to confirm. The main board is displayed as follows and the unit automatically enters the
next commissioning step.
Progress
04_Indoor unit
quantity
confirmation
Note: It is very important to correctly confirm the number of IDUs. If the confirmed quantity is
inconsistent with the actual quantity, the system may improperly run.
Step 9: Unit commissioning step 05 is internal communication detection.
If no exception is detected, the main board is displayed as follows and the unit automatically enters the
next commissioning step.
Commissioning Code
Progress
Code
05_Internal
communication
detection
db
If an exception is detected, the unit retains the current status and waits for manual troubleshooting.
Corresponding faults include:
Commissioning Code
Progress
Code
db
05_Internal
communication
detection
db
db
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Commissioning
Code
LED1
Display
Code Status
db On
Commissioning
Code
LED1
Display
Code Status
db On
Progress Code
LED1
Display
Status Code
On 05
Progress Code
LED1
Display
Status Code
On 05
On 05
On 05
Progress Code
LED2
Display
Code Status
04 On
Progress Code
LED2
Display
Code Status
04 On
Status Code
LED2 LED3
Display
Status Code
On OC
Status Code
LED2 LED3
Display
Status Code
On C2
On C3
On CH
111
Status Code
LED3
Display
Code Status
Number of
connected
IDUs Blinking
Status Code
LED3
Display
Code Status
OC On
Display
Status Meaning
The system
completes detection
and automatically
On enters the next step.
Display
Status Meaning
The system detects
communication failure
between master unit
and inverter
On compressor driver.
The system detects
communication failure
between master unit
and inverter fan
On driver.
The rated capacity
ratio is over-high
On between indoor and