Gree GMV-24WL/C-T, Service Manual, Page: 94 / 150

GREE DC Inverter Side Discharge VRF
Ⅱ
for North America
91
Description of each stage of debugging progress
-
Debugging
code
Progress code Status code
Code meaning and operation method
Progress
LED1 LED2 LED3
Code
Display
status
Code
Display
status
Code
Display
status
07_ Detect
indoor
components
db On 07 On
Error
code
On
System detects error on indoor
components. XXXX means the project
code of IDU with error. 3s later, related
error code will be showed. For instance, if
no.1 IDU has d6 and d7 errors, then the
LED3 digital tube will show circularly
00,01,d5,d6,07,92,d6,d7 every 2s. After
errors are eliminated, system will start
next step automatically. If power is off
during troubleshooting, then restart
debugging from progress 01 after power
is on.
db On 07 On OC On
No error on components of IDU. 2s later,
next step starts.
08_ Confirm
preheated
compressor
db On 08 On UO On
Preheat time for compressor is less than
8 hours. Display will be as in the left until
the preheat time reaches 8 hours. Press
main board’s SW7 button to confirm
manually that the preheat time has
reached 8 hours. Then start next step.
(Note: Compressor may get damaged if it
is started without 8 hours of preheat time)
db On 08 On OC On
Compressor has been preheated for 8
hours. 2s later, next step starts.
09_ Refrigerant
judgments
before startup
db On 09 On U4 On
System is lack of refrigerant and display
will be as in the left. Please cut off power
of IDU and ODU and check if there is
leakage on pipeline. Solve the leakage
problem and complement refrigerant into
the unit. Then connect power and restart
debugging from progress 01. (Note:
Before re-charging refrigerant, unit must
be power off in case system starts
progress 10 automatically.)
db On 09 On OC On
Refrigerant is normal and unit will display
as in the left for 2s. Then next step starts.