Toshiba MMK-UP0051DHPL-E(TR) Service Manual page 118

<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Uv line and Uc line (L2, L3, L4)
(2-core shield wire, non-polarity)
Uh line (L1)
(2-core shield wire, non-polarity)
• U (v, h, c) line means of control wiring.
Uv line : Between indoor and outdoor units.
Uh line : Central control line.
Uc line : Between outdoor and outdoor units.
• Uv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines
(L3+L4) in each refrigerant line is up to 1000 m.
Central control device
<U series>
Outdoor unit
(SMMS-u)
U1
<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.
Wire size :
Wire size :
Uh
U3 U4
U3 U4 U3 U4
Uh Uh
Uc
Uv Uv
U2 U5 U6 U1 U2
U1 U2
Uv Uv
A B
- 118 -
0.5 mm²
0.75 to 1.25 mm²
0.75 to 1.25 mm²
2.0 mm²
[Uh line]
L1 = Up to 2000 m
[Uv and Uc line]
L2 = Up to 1000 m
(L3+L4) = Up to 1000 m
U3 U4
Uh
Uc Uc
Uv
U5 U6 U1 U2 U5 U6
U1 U2 U1 U2
Uv
A B A B
(Up to 500 m)
(Up to 1000 m)
(Up to 1000 m)
(Up to 2000 m)
Uv
A B