Toshiba MMY-MAP0804HT8(Z)(ZG)-E Service Manual page 137

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.)
Header
unit
U3 U4
U1 U2 U5 U6
U1 U2 U1 U2
A B
Remote
controller
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.
SW01 SW02 SW03
2 1 2
2 2 2
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.
Header
Follower unit
unit
U3 U4
U1 U2 U5 U6 U1 U2
U1 U2
A B
Remote
controller
Indoor units to have their addresses initialized
SW04
Confirm that the 7-segment display indicates
"A.d.buS" and turn SW04 ON for more than five
seconds.
Confirm that the 7-segment display indicates
"A.d.nEt" and turn SW04 ON for more than five
seconds.
Follower unit
U3 U4 U3 U4
U5 U6 U1 U2
U1 U2
A B A B
Remote
controller
136
Central remote
controller
Header
unit
U3 U4
U5 U6 U1 U2 U5 U6
U1 U2
A B
Remote
controller
Clearable addresses
System/indoor unit/group address
Central control address
U1 U2
U3 U4