Multi Variable Air Conditioners Cassette Type Indoor Unit
18
5.2 Power Cord Connection
NOTES!
①
Every unit should be equipped with a circuit breaker for short-circuit and overload protection.
②
During operation, all indoor units connected to the same outdoor unit system must be kept
energized status. Otherwise, the unit can’t operate normally.
Fig.5.2
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L, N ".
(4) Fix the power cord with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit
(or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as shown in
Fig.5.3.1.
Fig.5.3.1 Fig.5.3.2
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in Fig 5.3.2, terminal
resistor is provided with each ODU.
