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Branch box controller board
PAC-AKA51BC
PAC-AKA31BC
LEV-A to E
Connect to LEV-A to E
LEV-A to C for PAC-AKA31BC
TH-A to E Connect to
Thermistor-A to E
TH-A to C for PAC-AKA31BC
CN3C, CND
Connect to TB2B
(Branch box / Outdoor unit
connecting wire)
TB3A to TB3E
Connect to TB3A to TB3E
(Branch box / Indoor unit connecting wire)
TB3A to TB3C for PAC-AKA31BC
LED1
Transmission start-up state display
Start-up : LED1 blinks
(0.5sec. : ON, 0.5sec. : OFF)
Start-up completion: LED1 lights
LED3~5
Not used
LED2
Transmission
(Branch box/outdoor)
Reception state display
on branch box side
Branch box No.1
LED2 blinks once.
(0.1sec. : ON,
0.9sec. : OFF)
Branch box No.2
LED2 blinks twice.
(0.1sec. : ON,
0.1sec. : OFF
0.1sec. : ON,
0.7sec. : OFF)
*The blinking interval
might change when
there are changes in
states of indoor units.