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Photovoltaic Multi VRF
Step 5: Find the module with "01" module address to be the master module. Hold SW7
button on the master module for at least 5s to enable debugging;
Step 6: Wait. Unit will then start progress 01 and 02; in progress 01, if master unit is not
correctly set, progress 01 will show the following errors:
Debugging Code
LED1
Progress
Display
Code
status
db
light
01_01 Set
up master
db
light
unit:
db
light
According to the above errors, reset the master unit as instructed in Master Unit Setup
SA8_MASTER_S. After reset is finished, start debugging again.
In progress 02, if master IDU is not detected, then progress 02 will show the following
errors:
LED1
Function code
Display mode
db
At this time, all buttons are ineffective. Set master IDU in 1min via debugging software. If
master IDU is not set in 1min, system will set up a master IDU randomly. After that, system will start
next progress.
Step 7: in progress 03, the quantity of modules needs to be confirmed manually. Main
board of each module will display:
Progress
03_Quantity of
modules
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:
Progress
03_Confirm the
quantity of modules
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.
Progress Code
LED2
Display
Code
status
01
light
01
light
01
light
Current progress
light
02
Debugging code
LED1
Code
Display status
db
light
Debugging code
LED1
Code
Display status
db
light
Status Code
LED3
Display
Code
status
System doesn't have master unit. Reset
CC
light
master unit.
More than 2 master units are set. Reset
CF
light
master unit.
Master unit is successfully set. Start next
OC
light
progress.
LED2
Display mode
light
Progress code
LED2
Code
Display status
03
light
Progress code
LED2
Code
Display status
03
light
43
Meaning
LED3
Current status
Display mode
L7
blink
Status code
LED3
Code
Display status
Quantity of
modules
Status code
LED3
Code
Display status
OC
blink
light
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