Sanyo CHDXR09663* Service Manual page 34

16. Backup Operation
Outdoor unit tonnage
Switches to turn ON INV+AC1+BU
(C) Close all service valves at the failed outdoor units.
(D) Reset the power at outdoor unit No.1.
* 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.
[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.
<S010 switch>
8 Ton
INV AC1
S010
(A) Compressor 1 backup
(B) Compressor 2 backup
( * )
AC2 Backup
ON
OFF
ON
OFF
ON
OFF * AC2 switch is not available.
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W-2WAY ECO-i SYSTEM
Control Functions
1