77
2) Turn on dip switch 2 of SW30 on the interface P.C. board of the header outdoor unit if the switch is OFF.
(Leave it as it is if it has already been set to ON.)
2 Turn on the indoor and outdoor units of the refrigerant line for which you want to initialize the
addresses. About one minute after turning on the power, confirm that the 7-segment display on
the header outdoor unit indicates “U.1. - - -” and operate the interface P.C. board on the header
outdoor unit of the refrigerant line as follows.
3 Confirm that the 7-segment display indicates “A.d. c.L.” and set SW01, SW02 and SW03 to 1, 1, 1
respectively.
4 After a time “U.1.L08” appears on the 7-segment display if the address clearing has been
completed successfully.
If the 7-segment display indicates “A.d. n.G.”, the outdoor unit may still connected with other
refrigerant lines. Check the connection of the relay connectors between [U1, U2] and [U3, U4].
NOTE
Take care to carry out the procedure above correctly; otherwise, addresses in other refrigerate lines may also be
cleared.
5 Set the addresses again after finishing the clearance.
SW01 SW02 SW03 SW04 Clearable addresses
212
Confirm that the 7-segment display indicates
“A.d.buS” and turn SW04 ON for more than five
seconds.
System/indoor unit/group address
222
Confirm that the 7-segment display indicates
“A.d.nEt” and turn SW04 ON for more than five
seconds.
Central control address
Central remote
control
Header
unit
Follower unit
Follower unit
Remote
control
Remote
control
Remote
control
Remote
control
Indoor units to have their addresses initialized
Header
unit
Header
unit
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