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[Master]
ETO operation specifications
1 Main indoor unit
– Based on the external contact control settings, the main indoor unit decides whether to generate output when
an error (indoor unit stop) occurs.
– Based on the ETO settings, the main indoor unit decides whether to generate output according to the
temperature and time conditions.
2 Sub indoor unit
– Based on the entrance control settings, the sub indoor unit decides the mode, set temperature, and fan speed
when contact inputs are given.
Enable of ETO
Main indoor unit
entrance control
Sub indoor unit
Enable of
external contact
X
X
X
O
O
X
O
O
Enable of
Enable of
external contact
X
X
X
O
O
O
[Slave]
Error port output
N/A
Output due to an error
Output by ETO entrance conditions (temperature /
time / error occurrence)
Output by ETO entrance conditions (temperature /
time / error occurrence)
Ready to control the main contact input
Operation when outputting Main
N/A
On with the previous operation conditions
On with the entrance control enabled
21
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