When connecting to Dry contact terminals of multiple indoor units, insulate each indoor unit with
relay, etc. as shown in example below.
Input device 1
Indoor unitIndoor unitIndoor unit
Power supply for relay
Input device 2
K1 to K6: Relay
(Device for DC current)
PCB
PCB
PCB
K1
K4
K5
K6
K2
K3
CNA02
CNA02
CNA02
CAUTION
Do not connect to multiple indoor units directly since it will cause breakdown.
¢ I
nput signal type
The input signal type can be selected by switching the DIP switch on the indoor unit PCB.
• DIP switch SET2-2: Edge or Pulse selection of external input
SET2-2 External input select Factory setting
Off Edge ♦
On Pulse
PulseE
dge
The width of pulse must be
longer than 200 msec.
NOTE: Input signal type of Ch3 (Forced thermostat off) is only Edge.
3-2. External input - (08-12) - 3. Indoor unit
EXTERNAL INPUT
AND OUTPUT
EXTERNAL INPUT
AND OUTPUT
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