V5 X VRF 50/60Hz
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5.5 Electronic Expansion Valve Control
The positions of electronic expansion valves EXVA and EXVB are controlled in steps from 0 (fully closed) to 480 (fully
open).
In cooling mode:
When all outdoor units are in standby:
All EXVs are at position 352 (steps).
When some outdoor units are running and some outdoor units are in standby:
EXVs on running outdoor units are controlled according to discharge temperature. EXVs of units in standby are
fully closed.
When all outdoor units are running:
All EXVs are controlled according to discharge temperature.
In heating mode:
When all outdoor units are in standby:
All EXVs are at position 352 (steps).
When some outdoor units are running and some outdoor units are in standby:
EXVs on running outdoor units are controlled according to discharge superheat. EXVs of units in standby are fully
closed.
When all outdoor units are running:
All EXVs are controlled according to discharge superheat.
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No. 5
No. 6
No. 7
No. 3
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No. 5
BP1
BP2
BP1
No. 4
No. 5
No. 6
No. 2
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No. 8
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No. 6
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BP2
BP1
BP2
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BP1
BP2
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