LG A2UW18GFA0 Svc Manual page 11

Part 1 General Information
3.3 BD units(Global)
P M BD 36
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Only for training and service purposes
2 0
Serial number
Number of connectable indoor units
Max. capacity of connectable indoor units
"36" mean that 5k~24k Indoor unit connected to BD unit
BD : Branch distributor
M : Multi system outdoor unit
P : Parts
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