D.C. Inverter Multi-variable Modular
45
Progress
LED1
LED2
LED3
Code
Display status
Code
Display status
Code
Display status
03_Confirm
the quantity of
modules
db
light
03
light
OC
light
If the quantity displayed is different from actual quantity, then disconnect power and check
whether communication wire among each module is correctly connected. After the check, start
debugging again.
Step 8:
in progress 04, the quantity of IDUs needs to be confirmed manually. Main board of each
module will display:
Debugging code
Progress code
Status code
Progress
LED1
LED2
LED3
Code
Display status
Code
Display status
Code
Display status
04_Confirm the
quantity of IDUs
db
Light
04
Light
Quantity of
connected
IDUs
blink
If the quantity displayed is the same with actual quantity, then press SW7 confirmation button on
the master unit to confirm it. Unit will start next progress:
Debugging code
Progress code
Status code
Progress
LED1
LED2
LED3
Code
Display status
Code
Display status
Code
Display status
04_Confirm the
quantity of IDUs
db
Light
04
Light
OC
Light
Step 9:
progress 05 is “Detect internal communication”
If no error is detected, system will display as below and then start next progress.
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
05_Detect internal
communication
db
Light
05
Light
OC
Light
Detection is finished. Start next progress.
If error is detected, system will stay at current progress. Error has to be solved manually. Below
are relevant errors:
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
05_Detect internal
communication
db
Light
05
Light
C2
Light
System detects “driven communication
error between master unit and inverter
compressor”.
db
Light
05
Light
C3
Light
System detects “driven communication error
between master unit and inverter fan”.
db
Light
05
Light
CH
Light
IDU/ODU “high proportion of rated capacity”.
db
Light
05
Light
CL
Light
IDU/ODU “low proportion of rated capacity”.
Elimination methods of above errors can be found in Troubleshooting.
Step 10:
progress 06 is “Detect outdoor components”
If no error is detected, system will display as below and then start next progress.
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
