(5) Power estimated value of commercial power supply operation (Pr. 892, Pr. 893, Pr. 894)
Select the commercial power supply operation pattern from among the four patterns of discharge damper control (fan),
inlet damper control (fan), valve control (pump) and commercial power supply drive, and set it to Pr. 894 Control
selection during commercial power-supply operation.
Set the motor capacity (pump capacity) in Pr. 893 Energy saving monitor reference (motor capacity).
The power consumption rate (%) during commercial power supply operation is estimated from the operation pattern
and the ratio of speed to rating (current output frequency / Pr. 3 Base frequency (rated frequency under the IPM motor
control (Refer to page 86)) in the following chart.
From the motor capacity set in Pr. 893 and Pr. 892 Load factor, the power estimated value (kW) during commercial
power supply operation is found by the following formula.
Power estimated value (kW) during commercial power supply operation
Since the speed does not increase above the power supply frequency in commercial power supply operation, it becomes
constant when the output frequency rises to or above Pr. 3 Base frequency (60Hz under IPM motor control).
Energy saving operation and energy saving monitor
Commercial power-supply drive
Inlet damper control
0 10 20 30 40 50 60 70 80 90100110
Ratio of speed to rating [%]
Power consumption (%)
= Pr. 893 (kW)
Pr. 892 (%)