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External Controller - Setting up programmable digital input
operation
If you require to operate control depending on external digital input(ON/OFF), connect cable to
indoor PCB(CN_EXT).
Follow below procedures step 1 ~ step 4.
Step 1. Check if the power of the unit is turned off.
Step 2. Disassemble front panels and distinguish control box(Indoor) of the unit
Step 3. Connect the external controller to PCB(CN_EXT) completely.
Step 4. Connect the cable and field installation part.
- For 3 Series
CN_EXT
- For 4 Series
Indoor PCB
Installation example #1
Indoor Unit
0.5 m
PCB
Supplied Part
Field Installation Part
Installation example #2
Indoor Unit
0.5 m
PCB
Max 10 m
Supplied Part
Field Installation Part
Determining the purpose of CN_EXT
Setting value: 0 ~ 5 step Indoor CN-EXT port
setting
- 0: default
- 1: Simple operation on / off
- 2: Dry contact (simple contact)
Indoor PCB
• SW : Single pole switch
- Select a part with contacts for extremely low
amperage
- DC 5 V ~ 12 V is used at the contact point
Max 10 m
- Switch load is approximately 0.5 ~ 1 mA
SW
• Control cable
- Cable size : 22 to 26 AWG
- Don't extend the cable more than 10 meters
• X : Relay(a point of contact, fixed DC 0.5 ~ 1 mA)
• SW : Distance ON/OFF switch
• Control cable(Indoor unit to Relay Circuit)
- Cable size : 22 to 26 AWG
- Don't extend the cable more than 10 meters
Relay Circuit
Power
X
SW
X
supply
of relay
ACCESSORIES INSTALLATION
CN_EXT
- 3: Emergency stop only for indoor unit
- 4: Reattachment / absence
- 5: Emergency stop of all indoor units (It can
be set only when indoor unit has
emergency stop function)
105
Adapter Cable
Adapter Cable
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