Gree Ultra Heat GMV-VQ72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION
103
Cooling mode when the outdoor environment temperature is higher than 20°C
（
68
℉）
.
Heating mode when the outdoor environment temperature is lower than 20°C
（
68
℉）
.
(3) Before starting commissioning, make sure again that stop valves of all basic modules of the
ODU have been completely opened.
(4) During commissioning, the front panel of ODU must be completely covered. Otherwise,
commissioning accuracy may be affected (as shown in the following figure).
(5) Before commissioning, make sure that appending refrigerants to pipes has finished completely
or for more than 70%.
(6) The following table describes progress display of each phase during commissioning:
Description of each stage of debugging progress
——
Debugging code Progress code Status code
Meaning
Progress
LED1 LED2 LED3
Code
Display
status
Code
Display
status
Code
Display
status
01_ Set master
unit malfunction
A0 Light System is not debugged.
CC Light
Master unit hasn
‘t been set, please
set it.
CF Light
Master unit is two or more than two.
Please reset.
CJ Light
Address DIP switch code of system
is shocking.
db Light 01 Light oC Light
Master unit has been set
successfully. Next step will start
automatically.
02_Allocate
addresses
db Light 02 Light oC Light
Address allocation is finished. Next
step will start automatically.
03_Confirm the
quantity of
modules
db Light 03 Blink 01~03 Blink
LED3 displays the quantity of
module. In this case, please
confirm if the quantity is correct
manually.
db Light 03 Light oC Light
System has confirmed the quantity
of module. Next step will start
automatically.
04_ Confirm the
quantity of IDUs
db Light 04 Blink 01~60 Blink
LED3 displays the quantity of IDU.
In this case, please confirm if the
quantity is correct manually.
db Light 04 Light oC Light
System has confirmed the quantity
of IDU. Next step will start
automatically.