D.C. Inverter Multi VRF Modular
52
01_01 Set
up master
unit:
System doesn’t have master unit. Reset
master unit.
More than 2 master units are set. Reset
master unit.
Master unit is successfully set. Start next
progress.
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:
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:
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:
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.
Step 8:
in progress 04, the quantity of IDUs needs to be confirmed manually. Main board of
each module will display:
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