Panasonic U-10MF1E8 Service Manual page 40

18. Service Maintenance Functions
18-5. Automatic Backup Mode: Outdoor EEPROM 49 (set only on outdoor unit No. 1)
Two types of automatic backup modes (when multiple outdoor units are installed) can be selected.
Setting
0 Backup outdoor units operate only during special control.
1 Only the backup compressors remain stopped. Other OK
1
compressors installed in the same outdoor unit operate as
normal.
* Even when "1" is set, the outdoor unit will remain stopped if all of the compressors in the outdoor unit have failed.
* If only 1 outdoor unit is installed, the operation is according to setting "1" even if "0" is set.
18-6. Snowfall Input Switching: Outdoor EEPROM 4A (set at each outdoor unit)
The snowfall sensor input terminal on the outdoor unit PCB is used for input from the snowfall sensor. It is also
possible to connect an external timer and use it to enable nighttime Quiet mode operation.
Setting
0 Used for snowfall sensor input (setting at
time of factory shipment).
1 Used for Quiet mode input.
18-7. Optional Solenoid Valve Control Operation Setting:
Outdoor EEPROM C0 (set at each outdoor unit)
Setting
0 No output (setting at time of factory shipment)
1 Refrigerant shut-off valve control (for cooling when the outdoor air temperature is
below standard conditions)
2 —
External liquid valve control (used in special cases when the discharge gas
3
temperature is likely to especially rise)
18-8. High Static Pressure Mode: Outdoor EEPROM 8F (set at each outdoor unit)
This product can be made compatible with high static pressure by changing the settings.
By changing the setting item 8F to "6," this product can be made compatibly.
Operation
Operation
Operation
Condition
Setting at time of factory
shipment
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3-WAY SYSTEM
Control Functions