Carrier 38QUS012D8S Service Manual page 153

Controller
2.Address setting
One non-polarity controller can control up to 16 indoor units.
When the non-polarity controller is connected to several units, every air-conditioner in network has only one
network address to distinguish each other.
Address code of air-conditioner in LAN is set by code switch ENC1(Duct and Ceiling& Floor) or
ADSS(Cassette) of the indoor unit, and the set range is 0-15.
Note: The indoor units are controlled at the same time, not independently. The purpose of setting network
address is identify the unit when error occurs.
Electrical Control System 151