
Heat Recovery DC Inverter Multi VRF Unit
52
Step 7: in progress 03, the quantity of modules 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
03_Confirmation
of module quantity
db
On
03
On
Module
quantity
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
03_Confirmation
of module quantity
db
On
03
On
OC
On
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
On
04
On
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
On
04
On
OC
On
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
On
05
On
OC
On
Detection is finished.
Start next progress
automatically.
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
Code
Display
Code
Display