Gree GMV-280WM/E1-X - Page 114

GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
110
Corresponding faults include:
Commissioning Code
Progress Code
Status Code
Meaning
Progress
LED1
LED2
LED3
Code
Display Status
Code
Display Status
Code
Display Status
07_Component
detection for IDU
db
On
07
On
XXXX/
Corresponding
fault code
On
The system detects
component failure of
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
Status Code
Meaning
Progress
LED1
LED2
LED3
Code
Display Status
Code
Display Status
Code
Display Status
08_Compressor
preheating
confirmation
db
On
08
On
OC
On
The system detects that the
compressor preheating period
is more than eight hours and
automatically enters the next
step.
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
Status Code
Meaning
Progress
LED1
LED2
LED3
Code
Display Status
Code
Display Status
Code
Display Status
08_Compressor
preheating
confirmation
db
On
08
On
U0
On
The system gives a prompt if the
compressor preheating period is
less than eight hours.
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
Status Code
Meaning
Progress
LED1
LED2
LED3
Code
Display Status
Code
Display Status
Code
Display Status
09_Pre-startup
refrigerant
detection
db
On
09
On
0C
On
The system detects that
refrigerants are normal and
automatically enters the next
step.
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.