Panasonic U-10MF1E8 Service Manual page 52

4. Backup Operation
• After adjusting the amount of refrigerant, turn OFF the power at the failed outdoor unit, release the
short-circuit at the vacuum application pin, and close the liquid tube valve at the failed outdoor unit.
* Refrigerant recovery is not affected by the power status of the failed outdoor unit. However, collecting
refrigerant in the failed outdoor unit is affected by whether the power at that outdoor unit can be turned
ON. If the power cannot be turned ON, use a refrigerant recovery device and recover the refrigerant into a
recovery cylinder in order to adjust the amount of refrigerant in the system.
4-2-2. Backup operation by setting the failed compressor not to operate
Backup operation settings for each compressor
INV compressor
OK
2
OK
OK
Failed
Failed
Failed
AC1 compressor AC2 compressor
OK
Failed
Failed
OK
OK
Failed
Outdoor Unit Repair Procedures
Setting for backup operation
Failed DIP switch S010:
Turn BACK UP and AC2 ON.
OK DIP switch S010:
Turn BACK UP and AC1 ON.
Failed DIP switch S010:
Turn BACK UP, AC1, and AC2 ON.
OK DIP switch S010:
Turn BACK UP and INV ON.
Failed DIP switch S010:
Turn BACK UP, INV, and AC2 ON.
OK DIP switch S010:
Turn BACK UP, INV, and AC1 ON.
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3-WAY SYSTEM