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[2] Disabling operation of 1 compressor
At the S010 switch on the PCB of the failed outdoor unit, turn ON the switch for the compressor to disable, and
turn ON the “backup” switch.
ON
(C) Close all service valves at the failed outdoor units.
(D) Reset the power at outdoor unit No.1.
Switches to turn ON
Outdoor unit tonnage 8 Ton
INV+AC1+BU
* When the PCB of the main unit is normal, by implementing the above settings while leaving the communica-
tion lines between indoor and outdoor units as they are, backup operation of units are possible. In this case,
the outdoor unit that backed up all compressors is not identified as an outdoor unit, however, it can work as
the command controller.
<S010 switch>
OFF
OFF
OFF
ON
ON
(A) Compressor 1 backup
S010
(B) Compressor 2 backup
INV AC1
AC2
( * )
* AC2 switch is not available.
Backup
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W-2WAY ECO-i SYSTEM
Control Functions
16. Backup Operation