Samsung AC009BNLDCH Service Manual page 228

Troubleshooting
Emergency Temperature Output (ETO) function (Cont.)
■ 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 con-
tact inputs are given.
Main indoor unit
Enable of entrance
Sub indoor unit
4-34
Enable of ETO Enable of external contact
X
X
O
O
Enable of external contact
control
X
X
O
X
O Output due to an error
Output by ETO entrance conditions
X
(temperature / time / error occurrence)
Output by ETO entrance conditions
O (temperature / time / error occurrence)
* Ready to control the main contact input
Operation when outputting Main
X
O On with the previous operation conditions
O On with the entrance control enabled
Error port output
N/A
N/A
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