Figure 3-4.1: Compressor priority and rotation – one outdoor unit
Figure 3-4.2: Compressor priority and rotation – two outdoor units
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Figure 3-4.3: Compressor priority and rotation – three outdoor units
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4.5 Electronic Expansion Valve Control
EXVA control
The position of electronic expansion valve EXVA is controlled in steps from 0 (fully closed) to 3000 (fully open).
In cooling mode:
When all outdoor units are in standby:
All EXVAs are at position 352×6(steps).
When some outdoor units are running and some outdoor units are in standby:
EXVAs on running outdoor units are controlled according to discharge temperature. EXVAs of units in standby are
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