Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 140 / 333

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7-4-4. Check after Address Setup when Central Control System Is Connected
When the central control system is connected, check that the following setup has finished after address setup.
Main check items Check
Relay
connector (1) Is the relay connector of the header unit connected after address setup?
(2) Is the relay connector of the follower unit removed?
Terminal
resistance (3) Is the end resistance (SW30-bit 2) of the header unit with the smallest line address number
in the central control turned on? (Setup is unnecessary for follower units.)
(4) Is the terminal resistance (SW30-bit 2) of the header units, except for the line with the
smallest central control line address, turned off? (Setup is unnecessary for follower units.)
Line address (5) Are addresses in the line address (SW13, SW14) not duplicated in each refrigerant line?
U1 U2
U1 U2 U1 U2 U1 U2 U1 U2
U5 U6
U3 U4
Header unit (A) Header unit (A)
U1 U2 U5 U6
U3 U4
U1 U2 U5 U6
A B A B A B A B
(5) (4)
(5)
(1) (2) (3)
Other refrigerant line
U1 U2
U3 U4
U3 U4
U1 U2 U5 U6
To other refrigerant line
U3 U4
Line address = 1 Line address = 2
Central remote
controller
Follower unit (B) Follower unit (C)
Outdoor unit
Indoor unit
Remote
controller Remote
controller Remote
controller
NOTE
The figure above does not show all the electric wires.
For details, refer to the installation manuals for the outdoor unit, indoor unit, remote controller, or optional
devices.
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