Toshiba MCY-MHP0305HT-C Service Manual page 42

(2) In the case that a central control system is connected (before address setup)
Central remote controller
Other
refrigerant line
U3 U4
SW13 SW14
CN10
CN02
SW30
U1 U2
To indoor unit
(1) Are the indoor and outdoor communication lines of the outdoor unit connected to the U1 / U2
terminals?
(2) Relay connector CN10 which is mounted on the interface P.C. board or has been removed from
the CN02? (Set up factory default)
(Keep the relay connector disconnected before address setup.)
(3) Is the communication line of the central control system connected to the outdoor unit U3 / U4
terminals of each refrigerant line?
(4) Is the terminal resistance (SW30-bit 2) on the interface P.C. board of the outdoor unit turned on? (Set
up factory default)
* After address setup and test operation check, turn on the SW30-bit 2 of the outdoor unit for the
smallest line address, and turn off SW30-bit 2 of the outdoor unit for other refrigerant lines. ("8-4-3.
Address setup procedure")
(5) Is the end terminal of the shield wire earthed?
(6) When the refrigerant line and the central control system of the DI-SDI series are connected:
Are Network adapter (TCB-PCNT30TLE2) correctly connected?
When the DI-SDI series operates with group, twin, or triple operation, are the adapters connected
to the header unit of the indoor unit?
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.
If connect a relay connector CN10 to CN02, will connected communication line [U1, U2] and [U3, U4].
If [U1, U2] is connected to the [U3, U4], refrigerant line address can not be set correctly.
(3)
(1) (2)
SW13 SW14
CN10
Outdoor unit
CN02
SW30
U1 U2
(4)
Indoor unit
Remote
controller
M a n i c h e c k i e t m s
41
64
U3 U4
(5)
Remote Remote
controller controller
To other refrigerant line
C h e c k