Gree Ultra Heat GMV-VQ72W/A-F, Service Manual, Page: 108 / 207

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION
104
05_Internal
communication
detection
C2 Light
Communication between master
ODU and inverter compressor
driver has error.
C0 Light
Communication between master
ODU and IDUs has error.
db Light 05 Light oC Light
System detection is done. Next
step will start automatically.
06_Detect
outdoor
components
Error
code
Light
System detects that outdoor
components have error.
db Light 06 Light oC Light
System detects no error on outdoor
components. Next step will start
automatically.
07_Detect
indoor
components
XXXX/
Error
code Light
System detects error on indoor
components. XXXX means the
project code of IDU with error. 3s
later, related error code will be
displayed.
db Light 07 Light oC Light
System detects no error on indoor
components. Next step will start
automatically.
08_Confirm
preheated
compressor
db Light 08 Light on Light
LED3 displays the on-off state of
ODU valves connecting with IDU.
In this case, please confirm if the
ODU valves are open manually.
db Light 08
Light
U0/
Preheat
time
Blink
U0 means preheat time for
compressor is less than 8 hours.
db Light 08 Light oC Light
Compressor has been preheated
for 8 hours. Next step will start
automatically.
09_Refrigerant
judgments
before startup
U4 Light System is lack of refrigerant.
db Light 09 Light oC Light
Refrigerant is normal. Next step will
start automatically.
10_
—— —— —— —— —— ——
No meaning.
11_
—— —— —— —— —— ——
No meaning.
12_Confirm
debugging
startup
db Light 12 Light AE Blink Ready for units to start debugging.
db Light 12 Light oC Light
The unit starts up in the status of
manual calculation of refrigerant
charging amount.
13_
—— —— —— —— —— ——
No meaning.
14_
—— —— —— —— —— ——
No meaning.
15_Cooling
debugging
db Light 15 Light UC Light
Debugging for cooling mode.
(Debugging operation mode, the
system will select automatically
with no need of manual setting).
Error
code
Light
Malfunction occurs when
debugging for cooling mode.
16_Heating
debugging
db Light 16 Light UH Light
Debugging for heating mode.
(Debugging operation mode, the
system will select automatically
with no need of manual setting).
Error
code
Light
Malfunction occurs when
debugging for heating mode.