Gree GMV5 Series Service Manual page 118

Commissioning
Progress
Code
Db
Db
15_Cooling
commissioning
operation Db
Db
Db
B. If the system selects the heating mode, the main board is displayed as follows:
Commissioning
Progress
Code
db
16_Heating
commissioning
operation
db
db
db
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Code Progress Code
LED1
Display
Status Code
On 15
On 15
On 15
On 15
On 15
Code Progress Code
LED1 LED2
Display Display
Status Code Status
On 16
On 16
On 16
On 16
Status Code
LED2
Display
Status Code
On AC
Corresponding
On fault code
On J0
On U9
On XXXX/U8
Status Code
LED3
Code
On AH
Corresponding
On fault code
On J0
On U9
115
LED3
Display
Status
The system is in
cooling-mode
commissioning operation
(the system
automatically selects the
commissioning operation
mode without needing
On manual settings).
A fault occurs on the
cooling-mode
commissioning
On operation.
A fault occurs on other
modules during the
cooling-mode
commissioning
On operation.
A fault occurs on ODU
On pipes.
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).
Display
Status Meaning
The system is in
heating-mode
commissioning operation
(the system automatically
selects the commissioning
operation mode without
On needing manual settings).
A fault occurs on the
heating-mode
On commissioning operation.
A fault occurs on other
modules during the
heating-mode
On commissioning operation.
A fault occurs on ODU
On pipes.
Meaning