Gree GMV5 Series Service Manual page 111

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
13_ ——
14_ ——
db
db
15_Cooling
operation by
manual
db
perfusion
db
db
db
db
16_Heating
operation by
manual
perfusion
db
db
db
—— —— ——
—— —— ——
On 15 On
On 15 On
On 15 On
On 15 On
On 15 On
On 16 On
On 16 On
On 16 On
On 16 On
On 16 On
—— ——
—— ——
AC On
Corresponding
fault code On
J0 On
U9 On
XXXX/U8 On
AH On
Corresponding
fault code On
J0 On
U9 On
XXXX/U8 On
108
refrigerant perfusion
commissioning operation
status.
No meaning.
No meaning.
The system is in
cooling-mode
commissioning operation
(the system
automatically selects the
commissioning operation
mode without needing
manual settings).
A fault occurs on the
cooling-mode
commissioning
operation.
A fault occurs on other
modules during the
cooling-mode
commissioning
operation.
A fault occurs on ODU
pipes or valves.
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).
The system is in
heating-mode
commissioning operation
(the system
automatically selects the
commissioning operation
mode without needing
manual settings).
A fault occurs on the
heating-mode
commissioning
operation.
A fault occurs on other
modules during the
heating-mode
commissioning
operation.
A fault occurs on ODU
pipes or valves.
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