Outline of Control (Outdoor Unit) < Symbols using in this manual > Si33-105
76 Function R407C PLUS Series Heat Recovery System
Remarks •
When the inverter drooping is lowering, the frequency change rate should be 20Hz/10sec
within the range in which the inverter acceleration rate of 2Hz/1sec can catch up.
•
When the inverter drooping is rising, it should be 16Hz/3min, and the restriction should be
cancelled when INV frequency
≥
79Hz.
•
When the drooping of cooling Pc and heating Pe are lowering, the frequency can be
decreased with 2 steps.
•
When the drooping of cooling Pc and heating Pe are rising, the upper limit should be raised
every 30 min.
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