Backup Operation When The Compressor Of The Slave Unit 1 Is Defective - Fujitsu Airstage V series Service Manual

1-2. Backup operation when compressor of the slave unit 1 is defective.
[Procedure]
(Example: Three outdoor units are connected.)
1. Stop the operation, and turn off the power of all outdoor units.
2. Fully close the 3-way valve (Liquid, Gas, and Oil) of the slave unit 1.
3. Set up the system as two outdoor units.
Set the DIP SW 4-1/ 4-2 (Connected number of slave units) of the master unit
from [ON/OFF] to [OFF/ON].
4. Set the slave unit 2 as Slave unit 1.
Set the DIP SW 3-3/ 3-4 (Outdoor unit address setting) of the slave unit 2
from [ON/ OFF] to [OFF/ ON].
5. Unplug the transmission connector from the slave unit 1's PCB,
or do not turn on the power of the slave unit 1 alone at the stage 6.
6. Turn on the power, and wait for 30 seconds or more.
7. Check LEDs of the master unit and the slave unit 2 as follows.
Master unit : If the error is less than level 1, it is ready for Backup operation.
Slave unit 2 : No error display
8. It is ready for Backup operation.
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