Daikin RWEYQ28PY1 [99/342] Other control

Daikin RWEYQ30PY1 [99/342] Other control
Other Control Si30-813
88 Function
8. Other Control
8.1 Outside Unit Rotation
In the case of multi-outside-unit system, this outside unit rotation is used to prevent the
compressor from burning out due to unbalanced oil level between outside units.
[Details of outside unit rotation]
In the case of multi-outside-unit system, each outside unit is given an operating priority for the
control.
Outside unit rotation makes it possible to change the operating priority of outside units.
Thus, the system becomes free of compressors that stop over an extended period of time at the
time of partial loading, preventing unbalanced oil level.
[Timing of outside unit rotation]
After oil return operation
At the beginning of the starting control
Example) The following diagram shows outside unit rotation in combination of 3 outside units.
*
“Master unit”, “slave unit 1” and “slave unit 2” in this section are the names for installation.
They are determined in installation work, and not changed thereafter. (These names are
different from “master unit” and “slave unit for control.)
The outside unit connected the control wires (F1 and F2) for the indoor unit should be
designated as master unit
Consequently, The LED display on the main PC board for “master unit”, “slave unit 1” and
“slave unit 2” do not change. (Refer to the page 101.)
Normal operation
Starting
control
Outside unit
rotation
Oil return operation
Priority
1
Priority
2
Priority
3
Outside unit
rotation
Priority
3
Priority
1
Priority
2
Normal operation
Normal operation
Oil return operation
Outside unit
rotation
Priority
2
Priority
3
Priority
1
Normal operation
Priority
3
Priority
1
Priority
2
Master Slave 1 Slave 2 Master Slave 1 Slave 2
Master Slave 1 Slave 2 Master Slave 1 Slave 2

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