D.C. Inverter Multi VRF Modular
49
pipe or at least 70% of the needed refrigerant has been added.
(6) Description of each stage of debugging progress:
Description of each stage of debugging progress
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.
Description of each stage of debugging progress
System is allocating addresses.
Master IDU is not set. Please set master
IDU. If it’s not set in 1min, system will set
the master IDU randomly.
Allocation is finished. Start next
progress.
03_Confirm the
quantity of
modules
LED3 displays the quantity of modules.
Confirm the number manually.
System has confirmed the quantity of
modules. Start next progress.
04_Confirm the
quantity of IDUs
LED3 displays the quantity of IDUs.
Confirm the number manually.
System has confirmed the quantity of
IDUs. Start next progress.
05_Detect
internal
communication
System detects “driven communication
error between master unit and inverter
compressor”.
System detects “driven communication
error between master unit and inverter
fan”.
IDU/ODU “high proportion of rated
capacity”.
IDU/ODU “low proportion of rated
capacity”.
Detection is finished. Start next progress.
System detects error in outdoor
components.
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