Gree GMV-280WL/C-X - Page 29

DC Inverter Multi VRF System
26
5.2.2 Test Operation and Debugging
Description of test operation procedures and main board display of ODU
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
01_
Set master
unit
db
On
01
On
AO
On
System is not debugged.
db
On
01
On
OC
On
Hold main board’s SW7 button for 5s
to start debugging. Main board will
display as said in the left. 2s later, next
step starts.
02_
Allocate
addresses
db
On
02
On
Ad
Blink
System is allocating addresses. 10s later,
display as below:
db
On
02
On
L7
Blink
No master indoor unit. Display will be on
for 1min, during which master IDU can be
set manually. If not, system will set the
unit with minimum IP address as the
master IDU.
db
On
02
On
OC
On
Allocation is finished. 2s later, next step
starts.
03_
Confirm
the
quantity of
ODU
db
On
03
On
01
Blink
System is confirming. 1s later, next step
starts.
db
On
03
On
OC
On
System finishes confirmation. 2s later,
next step starts.
04_
Confirm
the
quantity of
IDU
db
On
04
On
01~8
0
Blink
LED3 displays the quantity of indoor unit.
Confirm the number manually. If the
number is not consistent the display
one, cut off power of IDU and ODU and
check whether communication wire of
IDU is correctly connected. After the
check, connect power and start
debugging from progress 01. If the
number is then correct, press main
board’s SW7 button to confirm. Then
the display is as below:
db
On
04
On
OC
On
System has confirmed the quantity. 2s
later, next step starts.
05_ Detect
ODU’s
internal
communic
ation and
capacity
ratio
db
On
05
On
C2
On
Communication between master ODU
and driver has error. Check the
communication connection of ODU’s
main board and drive board. When the
error is eliminated, start next step. If
power is off during troubleshooting, then
restart debugging from progress 01 after
power is on.
db
On
05
On
OC
On
Communication of master ODU and
driver is normal. Unit will display as in the
left for 2s and detect the capacity ratio of
IDU and ODU. If the ratio is within range,
than next step will start 2s later. If the
ratio is out of range, unit will display as
below:
db
On
05
On
CH
On
Rated capacity ratio of IDU is too high.
Change the combination way of IDU
and ODU to make the ratio within
range. And restart debugging from
progress 01.
db
On
05
On
CL
On
Rated capacity ratio of IDU is too low.
Change the combination way of IDU
and ODU to make the ratio within
range. And restart debugging from
progress 01.
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