Gree GMV5E Series Service Manual page 114

GREE
Corresponding faults include:
Commissioning Code
Progress
Code Display Status Code Display Status
07_Component
db
detection for IDU
"XXXX" indicates the project number of the faulty IDU. The corresponding fault code is displayed
after three seconds. For example, if a d5 fault occurs on IDU 100, LED3 will circularly display "01", "00"
(two seconds later), and "d5" (two seconds later).
For details about the above troubleshooting method, refer to the "Troubleshooting Method" part.
Step 13: Unit commissioning step 08 is compressor preheating confirmation.
If it is detected that the compressor preheating period is more than eight hours, the main board is
displayed as follows and the unit automatically enters the next step.
Commissioning Code
Progress
Code
08_Compressor
preheating db
confirmation
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_Compressor
preheating db
confirmation
Step 14: 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 db
detection
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.
Progress Code
LED1 LED2
On 07
Progress Code
LED1 LED2
Display Status Code Display Status
On 08
Progress Code
LED1 LED2
Display Status Code Display Status Code Display Status
On 08
Progress Code
LED1 LED2
Display Status Code
On 09
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
Status Code
Code
XXXX/
On Corresponding
fault code
Status Code
LED3
Code Display Status
On OC
Status Code
LED3
On U0
Status Code
LED3
Display Status Code Display Status
On 0C
110
LED3
Display Status
The system detects
On component failure of
IDU.
Meaning
The system detects that the
compressor preheating period
On is more than eight hours and
automatically enters the next
step.
Meaning
The system gives a prompt if the
On compressor preheating period is
less than eight hours.
Meaning
The system detects that
refrigerants are normal and
On
automatically enters the next
step.
Meaning