Panasonic U-8ME1E8E Service Manual page 45

12. Backup Operation
All compressors of sub outdoor unit are backed up
Examples:
Combination of 3
1
outdoor units with
2 compressors
Number of setting
Unit No.
All compressors in unit No. 2 are bucked up. Therefore the setting No. of outdoor units installed on the main outdoor
PCB is changed to "2" from "3".
All compressors of main outdoor unit are backed up
Examples:
Combination of 3
outdoor units with
2 compressors
Number of setting
Unit No.
All compressors in unit No. 1 are bucked up. Therefore the setting No. of outdoor units installed on the main outdoor
PCB is changed to "2" from "3".
Unit No. 1 Unit No. 2
Main unit Sub unit
CCU function
Main outdoor unit Sub outdoor unit Sub outdoor unit
2 Not necessary
1
Unit No. 1 Unit No. 2
Main unit Sub unit
CCU function
Main outdoor unit Sub outdoor unit Sub outdoor unit
2 Not necessary
1
Unit No. 3
Sub unit
Not necessary
2 3
Same setting
Unit No. 3
Sub unit
Not necessary
2 3
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2WAY SYSTEM
Control Functions - Outdoor Unit