GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
112
Commissioning Code
Progress Code
Status Code
Meaning
Progress
LED1
LED2
LED3
Code Display Status Code
Display Status
Code Display Status
12_Unit
commissioning
startup
confirmation
db
On
12
On
AE
On
The unit is set to
manually-calculated refrigerant
perfusion commissioning
status.
Step 18: After unit startup confirmation, the system automatically selects the cooling or heating
mode according to the environment temperature.
A. If the system selects the cooling 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
15_Cooling
commissioning
operation
zDb
On
15
On
AC
On
The system is in cooling-mode
commissioning operation (the system
automatically selects the
commissioning operation mode without
needing manual settings).
Db
On
15
On
Corresponding
fault code
On
A fault occurs on the cooling-mode
commissioning operation.
Db
On
15
On
J0
On
A fault occurs on other modules during
the cooling-mode commissioning
operation.
Db
On
15
On
U9
On
A fault occurs on ODU pipes.
Db
On
15
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).
