Panasonic U-8MF2E8 - Manual Backup Operation

3WAY SYSTEM
Control Functions
1 - 46
1
12. Backup Operation
12-2. Manual Backup Operation
12-1-4. Check for Blinks When Automatic Backup Setting
When operating the automatic backup by setting the outdoor unit EEPROM, blink check on the remote controller
and centralized control systems is enabled to change for non-displayed.
EEPROM setting in main outdoor unit
CODE: 49
Setting No.
0 Display (factory preset mode)
1 Non-displayed
Outdoor unit
Switches to turn ON
8hp, 10hp
INV + BU
12hp, 14hp, 16hp
INV + AC1 + BU
The manual backup can be used when it is necessary to close the service valve for maintenance, etc.
Backup operation procedure
[1] Disconnecting the failed outdoor unit
[2] Disabling operation of 1 compressor
(1)
At the SW7 switch on the PCB of the failed outdoor unit, turn ON the switch for the compressor to disable,
and turn ON the “backup” switch.
Reduce the number of outdoor units set at outdoor unit No.1 by the number of failed outdoor units.
(2) At the SW7 switch on the PCB of the failed outdoor unit, turn ON the switches for all compressor to disable,
and turn ON the “backup” switch.
(3) Close all service valves at the failed outdoor units.
(4)
* The outdoor unit that backed up all compressors is not controlled by CCU (main outdoor unit).
Even if all compressors of the main outdoor unit are backed up, they are not controlled by CCU.
However, the CCU function stays active.
Reset the power at outdoor unit No.1.
<SW7 switch>
INV AC1 Backup
ON
OFF
Compressor 2 backup
ON
OFF
• In order to perform simultaneous backup operation for 2 or more compressors, use a combination of the switch
settings shown above.
hp = horsepower
SM830226-003WAYECO-iSYSTEM.in4646SM830226-003WAYECO-iSYSTEM.in4646 2013/02/1311:52:292013/02/1311:52:29