Mitsubishi Electric PUHY-P250YNW-A Service Handbook page 128

[6-5 Initialization Procedure for System Rotation Settings ]
(2) Normal mode (without test run mode)
1) Before setting is started, default value of "SR Stop" is 1. (It depends on the previous status.)
Turn DipSW5-10 on control unit (#51) then "SR Backup unit" and "SR units" changes.
2) Switch SW9 to "Local" and run all units via remote controller, then switch SW9 to "Normal".
BS_06_C
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