Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit 
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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 
(1)  Detach the electric box lid. 
(2)  Let the power cord pass through the wiring through-holes. 
(3)  Connect wires according to Fig. 5.2. 
(4)  Fix the power cord with wiring clamp. 
5.3 Connection of Communication Wire between  Indoor Unit and 
Outdoor Unit (or Indoor Unit) 
For units with single-phase power supply. 
(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