DC Inverter Multi VRF System
26
PC with applicable debugging software. Make sure unit’s real
-time data can be checked
through this computer. Information on the debugging software can be found in the
Service Manual
.
(9) Before test operation, make sure unit is powered on and compressor has been preheated
for more than 8 hours. Touch the unit to check
whether it’s normally preheated. If yes,
start test operation.
If compressor hasn’t been preheated, it
might be damaged by
testing.
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 shown to
the left. 2s later, next step starts.
02_ Allocate
addresses
db
On
02
On
Ad
Blink
System is assigning 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 automatically 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 units.
Confirm the number manually. If the number is not
correct, cut off power of IDU and ODU and check
whether communication wire of IDU is correctly
connected. After the check, reconnect power and
start debugging from level 01. If the number is
then correct, press main board’s SW7 button to
confirm. Then the display will move on to then
next step:
db
On
04
On
OC
On
System has confirmed the quantity. 2s later, next
step starts.
05_ Detect
ODU’s inter
nal
communication
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 step 01 after power is on.
db
On
05
On
OC
On
Communication of master ODU and driver is
normal. Unit will display as shown to 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 of IDU and ODU to make the ratio
