Gree GMV-224WM/B-X, Service Manual

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GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
115
Commissioning
Code Progress Code Status Code
Meaning
Progress
LED1 LED2 LED3
Code
Display
Status Code
Display
Status Code
Display
Status
15_Cooling
commissioning
operation
Db 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).
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.