Mitsubishi Electric CITY MULTI PUHY-P72TNU-A-B Manuel D'installation page 52

(2) When MA remote controllers are connected
* Move the power jumper from
CN41 to CN40. *
1
* SW5-1: ON *
2
* Leave the power jumper
connected to CN41.
* SW5-1: ON *
2
*1 When a power supply unit is not connected to the centralized control transmission cable, move the power jumper from CN41 to CN40 on
only one of the outdoor units (except TNU model). When the system controller is connected to TB7 side and TNU outdoor unit model is
used, connect a power supply unit to TB7 side. If a power supply unit cannot be used, connect the system controller to TB3 side. Up to
three system controllers can be connected to TB3 side.
*2 If a system controller is used, set SW5-1 on ALL of the outdoor units to ON.
*3 When a PAR-30MAAU is connected to a group, no other MA remote controllers can be connected to the same group.
Maximum allowable length of control cables
Transmission cables via outdoor units
Transmission cables
Remote controller cables
*4 When extending the length of the transmission cables to 1000 m (3280 ft), consult your dealer.
(3) When a transmission booster unit is connected
TB7 TB7
Ⓐ
Shielded cable
Ⓐ
*1 Daisy-chain terminals (TB3) on outdoor units together in the same refrigerant system.
*2 Leave the power jumper connected to CN41.
Maximum allowable length of control cables
Transmission cables
Remote controller cables
WT09452X01
Group 1
Ⓐ
Ⓒ
L + L
1
L , L
1
m + m
1
TB7
L + L
1
L + L
6
ℓ , ℓ
1
* If the length exceeds 10 m (32 ft), the length that exceeds 10 m (32 ft) needs
to be included in the maximum allowable length of transmission cables
above.
GB-50
Group 3 Group 5
Ⓑ
+ L + L , L + L + L ≤ 500 m (1640 ft)
2 3 4 1 2 6
+ L , L , L + L ≤ 200 m (656 ft)
3 4 6 2 6
, m + m + m + m ≤ 200 m (656 ft)
2 1 2 3 4
Earth
+ L + L + L , L + L + L
2 3 5 6 1 2 3
+ L + L , L + L + L + L
5 3 4 4 3 5 7
≤ 10 m (32 ft)
2
Shielded cable
Ⓐ
Sub remote controller
Ⓑ
Ⓒ System controller
*4
+ L + L , L + L + L ,
5 7 1 2 4
≤ 200 m (656 ft)