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ll-Mounted Indoor Unit Engineering Manual
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STANDARD WALL-MOUNTED
Electrical Wiring Diagram
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Figure 32: ARNU303SVA4 and ARNU363SVA4 Wiring Diagram.
Table 26: SV Frame Wiring Diagram Legend.
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PCB Connection
Purpose
Function
CN-POWER
AC Power supply
AC Power line input for indoor controller
CN-MOTOR
Fan motor output
Motor output of BLDC
CN-LEV
EEV output
EEV control output
CN-U/D
Step motor
Step motor output
CN-DISP2
Display
Display of indoor status
CN-DISP1
Display
Display of indoor status
CN-CC
Dry contact
Dry contact line
CN-485
Communication
Connection between indoor and outdoor units
CN-REMO
Remote controller
Remote control line
CN-EXT1
External ON / OFF controller
External ON / OFF controller connection
CN-TH1
Return air and inlet pipe thermistor
Return air and inlet pipe thermistor connection
CN-TH2
Outlet pipe thermistor
Outlet pipe thermistor connection
CN-TH3
Float switch
Float switch connection