Gree GMV-120WM/B-F

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
140
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).
B. If the system selects the heating mode, the main board is displayed as follows:
Progress
Commissioning Code
Progress Code
Status Code
Meaning
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
Corresp
onding
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/U
8
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 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:
Progress
Commissioning Code
Progress Code
Status Code
Meaning
LED1
LED2
LED3
Code
Display
Status
Code
Display
Status
Code
Display
Status
17_Commissi
oning
completion
status
01~04
On
OF
On
OF
On
The unit has completed
commissioning and in
standby status. LED1
displays the module