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ENGLISH
Setting the Pipe Addresses Automatically (Auto pipe pairing operation)
You can use the Automatic pipe-address setting operation to automatically set the address of each MCU port
that is connected to an indoor unit.
If an MCU port is set incorrectly or a pipe between an MCU and an indoor unit is connected incorrectly, that
indoor unit is indicated.
Check items before running the Auto pipe pairing operation
1. Ensure that the service valve of the outdoor unit is open.
2. Ensure that the power cables and communication cables of the indoor and outdoor units are correctly
connected.
3. Turn on the indoor and outdoor units 6 hours before running the Automatic pipe-address setting operation
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4. Before turning on the power, check whether the voltages and phases are correct by using a voltmeter and
a phase tester.
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Check for the R, S, T, and N terminals: ensure that 380-415V is read between lines (R-S, S-T, T-R) and 200-
240V (R-N, S-N, T-N) between phases.
5. After the power is turn on, set the devices (indoor unit, MCU, and others) that are connected to the outdoor
unit, and set the options.
Note that, before the MCU port addresses are set, MCU port setting errors (E216, 217, 218) may occur. You
can run the Automatic pipe-address setting operation regardless of MCU port setting errors.
6. If the OAP(Outdoor Air Processing) Duct or Hydro unit is connected, set the pipe addresses manually
referring to [Setting the Pipe Addresses Manually].
7. Check the operating temperature for the Automatic pipe-address setting operation:
If this operation is run at a temperature out of the operating temperature range, the addresses set
automatically may be incorrect. Set the pipe addresses manually by referring to Setting the Pipe Addresses
Manually.
8. Auto pipe-pairing operation does not work within 3 minutes after power on and reset due to
communication check.
[Operating temperature for the Auto pipe pairing operation]
45
24
-10
10
24
32
30
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Main cooling operation
Main heating operation
