Check After Address Setup When Central Control System Is Connected - Toshiba MMY-MAP0804HT8-E Service Manual

7-4-4. Check after Address Setup when Central Control System Is
When the central control system is connected, check that the following setup has finished after address setup.
U1 U2
U3 U4
Other refrigerant line
Relay
connector
Terminal
resistance
Line address (5) Are addresses in the line address (SW13, SW14) not duplicated in each refrigerant line?
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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Connected
(4) (1)
Central remote
controller
Line address = 2
Header unit (A)
U3 U4
Outdoor unit
U1 U2 U5 U6
(5)
Indoor unit
(1) Is the relay connector of the header unit connected after address setup?
(2) Is the relay connector of the follower unit removed?
(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.)
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(5) (3)
Line address = 1
Header unit (A) Follower unit (B)
U3 U4
U1 U2 U5 U6 U1
U1 U2 U1 U2
A B A B
Remote Remote
controller controller
Main check items
138
(2)
To other refrigerant line
Follower unit (C)
U3 U4 U3 U4
U2 U5 U6 U1 U2 U5
U1 U2 U1 U2
A B A B
Remote
controller
Check
U6