GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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B. If the system selects the heating mode, the main board is displayed as follows:
Commissioning
Code
Progress Code
Status Code
Meaning
Progress
LED1
LED2
LED3
Code
Display
Status
Code
Display
Status
Code
Display
Status
16_Heating
commissioning
operation
db
On
16
On
AH
On
The system is in heating-mode
commissioning operation (the system
automatically selects the
commissioning operation mode
without needing manual settings).
db
On
16
On
Corresponding
fault code
On
A fault occurs on the heating-mode
commissioning operation.
db
On
16
On
J0
On
A fault occurs on other modules
during the heating-mode
commissioning operation.
db
On
16
On
U9
On
A fault occurs on ODU pipes.
db
On
16
On
XXXX/U8
On
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" (two
seconds later).
Step 19: 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 Code
Progress Code
Status Code
Meaning
Progress
LED1
LED2
LED3
Code Display Status Code Display Status Code Display Status
17_Commissioning
completion status
01~04
On
OF
On
OF
On
The unit has completed
commissioning and in standby
status. LED1 displays the module
address; LED2 and LED3 display
"OF".
Step 20: After unit commissioning is completed, set unit functions according to the actual
engineering requirements on functions. For details about the setting method, refer to the "System
Function Setting Method" part. Skip this step if there are not special requirements.
Step 21: Deliver the unit for use and let users know the precautions.
3.3.3.2.2 Commissioning Through the Commissioning Software
Step1: Install commissioning software to the computer and connect monitoring communication
cables (for details about the operation method, see the "GREE Central Air Conditioning Commissioning
Software" section).
Step 2: Completely cover the front panel of ODU.
Step 3: In power-off status of ODU, set the ODU to a corresponding static pressure mode according
to static pressure design requirements for outdoor engineering. For details about the setting method, see
the "Outdoor Fan Static Pressure Setting DIP Switch (SA6_ESP_S)" section.
Step 4: In power-off status of ODU, set one module of ODU to master unit. For details about the
