Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 138 / 333

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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.)
U3 U4
U1 U2 U5 U6
U1 U2
A B
U3 U4
U1 U2 U5 U6
U1 U2
A B
U3 U4
U1 U2 U5 U6
U1 U2
A B
U3 U4
U1 U2 U5 U6
U1 U2
A B
U3 U4
U1 U2
U1
U3 U2
U4
U5 U6
U1 U2
A B
Central remote
controller
Header
unit
Follower unit Follower unit
Remote
controller
Remote
controller
Remote
controller
Remote
controller
Indoor units to have their addresses initialized
Header
unit Header
unit
SW01 SW02 SW03 SW04 Clearable addresses
2 1 2
Confirm that the 7-segment display indicates
“A.d.buS” and turn SW04 ON for more than five
seconds.
System/indoor unit/group address
2 2 2
Confirm that the 7-segment display indicates
“A.d.nEt” and turn SW04 ON for more than five
seconds.
Central control address
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.
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