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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
Enable of entrance control
Sub indoor unit
Step 19 Pumping down refrigerant
WARNING
•
After installing the product, be sure to perform leak tests
on the piping connections. After pumping down refrigerant
to inspect or relocate the outdoor unit, be sure to stop the
compressor and then remove the connected pipes.
–
Do not operate the compressor while a valve is open due
to refrigerant leakage from a pipe or an unconnected or
incorrectly connected pipe. Failure to do so may cause
air to flow into the compressor and too a high pressure
to develop inside the refrigerant circuit, leading to an
explosion or product malfunction.
Pump-down is an operation intended to collect all the system
refrigerant in the outdoor unit. This operation must be carried
out before disconnecting the refrigerant pipe in order to avoid
refrigerant loss to the atmosphere.
1
Turn the system on in cooling with fan operating at high
velocity and then let the compressor run for more than
Enable of external contact
X
X
X
O
O
X
O
O
Enable of external contact
X
X
X
O
O
O
Error port output
Output due to an error
Output by ETO entrance conditions
(temperature / time / error occurrence)
Output by ETO entrance conditions
(temperature / time / error occurrence)
Operation when outputting Main
On with the previous operation conditions
On with the entrance control enabled
2
Release the valve caps on High and Low pressure side.
3
Use L-wrench to close the valve on the high pressure side.
4
pressure side.
5
Stop operation of the air conditioner by pressing the
(Power) button on the indoor unit or remote control.
6
Disconnect the pipes.
B (liquid)
N/A
N/A
A (gas)
English
27
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