Gree GMV5 Series Service Manual page 116

displayed as follows and the unit automatically enters the next step.
Commissioning Code
Progress
Code
08_Compresso
r preheating
confirmation
db
If it is detected that the compressor preheating period is less than eight hours, an exception is prompted
and the main board is displayed as follows. In this case, press "SW7" to skip the waiting time and
automatically enter the next commissioning step. However, the compressor may be damaged if it is
forcibly started.
Commissioning Code
Progress
Code
08_Compresso
r preheating
confirmation
db
Step 13: Unit commissioning step 09 is pre-startup refrigerant confirmation.
If the refrigerant volume meets the system startup requirements, the main board is displayed as follows
and the unit automatically enters the next commissioning step.
Commissioning Code
Progress
Code
09_Pre-startup
refrigerant
detection
db
If no refrigerant exists in the system or the refrigerant volume does not meet the system startup
requirements, "U4 lack of refrigerant protection" is prompted and the main board is displayed as follows.
The unit cannot enter the next commissioning step. In this case, check for leakage or append
refrigerants till the exception disappears.
Commissioning Code
Progress
Code
09_Pre-startup
refrigerant
detection
db
Step 14: Unit commissioning step 10 is pre-startup ODU valve status detection.
If the master unit is displayed as follows, it indicates that the unit is being enabled.
Commissioning Code
Progress
Code
10_Pre-startup
ODU valve
status db
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
Progress Code
LED1
Display
Status Code
On 08
Progress Code
LED1
Display
Status Code
On 08
Progress Code
LED1
Display
Status Code
On 09
Progress Code
LED1
Display
Status Code
On 09
Progress Code
LED1
Display
Status Code
On 10
Status Code
LED2 LED3
Display
Status Code
On OC
Status Code
LED2 LED3
Display
Status Code
On U0
Status Code
LED2 LED3
Display
Status Code
On 0C
Status Code
LED2 LED3
Display
Status Code
On U4
Status Code
LED2 LED3
Display
Status Code
On ON
113
Display
Status Meaning
The system detects
that the compressor
preheating period is
more than eight hours
and automatically
On enters the next step.
Display
Status Meaning
The system gives a
prompt if the
compressor preheating
period is less than eight
On hours.
Display
Status Meaning
The system detects that
refrigerants are normal
and automatically
On enters the next step.
Display
Status Meaning
The system detects
insufficient refrigerants
and stops to balance
the pressure lower than
On 0.3 MPa.
Display
Status Meaning
Outdoor unit valves are
On being opened.