SiEN18-622 Basic Control
Function 97
ΔD Control Receiving the capacity request signal from the indoor unit, the outdoor unit corrects its target
pressure for capacity control.
Controls ΔD signal from indoor unit as follows.
UP control : When the UP command come from more than one indoor unit among
thermostat-ON indoor units.
Down control: When the down command come from all indoor units among thermostat-ON
indoor units.
Keep control: Except for the above
About detail of ΔD signal, refer to P114
Cooling Operation
TeS = TeS initial value + KTe2
KTe2 : Correction value by ΔD signal in cooling.
Δ D control
Keep the current KTe2
KTe2 = KTe2 – 0.5 KTe2 = KTe2 + 0.5
(Q0396)
KTe2 = 0
(without correction)
Not during compressor frequency PI
control
During compressor frequency PI
control (KTe2 = 0)
Up control by Δ D signal
continues 120 sec.
Down control by Δ D signal
continues 120 sec.
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