Fuji Electric FRENIC-HVAC Manual page 119

(*10) 4.0 kW for the EU.
(*11) Voltage unbalance [%] = (Max. voltage [V] - Min. voltage [V])/Three-phase average voltage [V] x 67 (See IEC/EN 61800-3.)
If this value is 2 to 3%, use an optional AC reactor (ACR). *Applies to all models, regardless of capacity.
Even if the voltage drops down to -20%, the inverter can run (operation guaranteed) provided that the load current is within the inverter rated
current range. *Applies only to models with a capacity of 37 kW or less.
(*12) IP55 offers protection for short water jets. Do not use outdoors or in places where long-term waterproofing is required.
(*13) Do not install the inverter in an environment where it may be exposed to lint, cotton waste or moist dust or dirt which will clog the heat sink
of the inverter. If the inverter is to be used in such an environment, install it in a dustproof panel of your system.
(*14) If you use the inverter in an altitude above 1000 m, you should apply an output current derating factor as listed in the table below.
Altitude
Output current derating factor
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1000 m or lower 1000 to 1500 m
1.00 0.97
7-2
1500 to 2000 m 2000 to 2500 m
0.95 0.91
2500 to 3000 m
0.88