DC Inverter Multi VRF System
33
Charging of refrigerant is invalid
Communication malfunction
between IDU, ODU and
IDU’s wired controller
Communication malfunction
between main control and inverter
compressor driver
Communication malfunction
between main control and
inverter fan driver
Malfunction of lack of IDU
Alarm because project code of
IDU is inconsistent
Emergency status of compressor
Rated capacity is too high
Malfunction of lack of main
control unit
Rated capacity is too low
Malfunction of multiple main
control units
Malfunction of multiple main wired
controllers
Malfunction of multiple main
wired controllers
Communication malfunction
between IDU and the receiving
lamp plate
Overflow distribution of IP
address
Unit waiting for debugging
Inquiry of compressor operation
parameters
Refrigerant recovery
operation of after-sales
Heat pump function setting
EU AA level EER test mode
Charging refrigerant automatically
Charging refrigerant manually
Alarm for cleaning filter
Debugging confirmation for
startup of unit
Long-distance emergency
stop
Emergency stop of operation
SE operation setting of system
Setting of defrosting cycle K1
Setting of upper limit of IDU/ODU
capacity distribution ratio
Limit setting for max.
capacity/output capacity
Inquiry of project code of IDU
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