Toshiba MMK-UP0051DHPL-E(TR) Service Manual page 119

<In the case of combining with outdoor units other than Super Modular Multi System u series
(SMMS-u)>
Control wiring between indoor units, and outdoor unit (L2, L3)
(2-core shield wire, non-polarity)
Central control line wiring (L1)
(2-core shield wire, non-polarity)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity)
• The length of the communication line (L1+L2+L3) means the total length of the inter-unit wire length
between indoor and outdoor units added with the central control system wire length.
Central control device
<Other than U series>
Outdoor unit
(SMMS-i) U1
(SMMS-e)
(MiNi SMMS)
etc.
<U series>*
U1 U2
Indoor unit
<U series>*
Remote controller
* Even if the indoor unit and the remote controller are "other than U series", the wiring
specification are the same.
U3 U4
U3 U4 U3 U4
U2 U5 U6 U1 U2
U1 U2
Uv Uv
A B
- 119 -
1.25 mm²
Wire size :
2.0 mm²
Wire size : 1.25 to 2.0 mm²
[Communication line]
(L1+L2+L3) = Up to 2000 m
L4 = Up to 100 m
U3 U4
U5 U6 U1 U2 U5 U6
U1 U2 U1 U2
Uv
A B A B
(Up to 1000 m)
(Up to 2000 m)
(Up to 100 m)
Uv
A B