DC Inverter Multi VRF System
22
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
01~80
Blink
LED3 displays the quantity of indoor unit.
Confirm the number manually. If the
number is not consistent with 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.
