Fuji Electric FRENIC-HVAC Manual page 64

• If you enable the "Restart mode after momentary power failure" (Function code F14 = 3 to 5), then the
inverter automatically restarts running the motor when the power is recovered.
Design the machinery or equipment so that human safety is ensured after restarting.
• If the user configures the function codes wrongly without completely understanding this Instruction
Manual and the FRENIC-HVAC User's Manual, the motor may rotate with a torque or at a speed not
permitted for the machine.
An accident or injuries could occur.
• Even if the inverter has interrupted power to the motor, if the voltage is applied to the main circuit input
terminals L1/R, L2/S and L3/T, voltage may be output to inverter output terminals U, V, and W.
• Even if the motor is stopped due to DC braking, voltage is output to inverter output terminals U, V, and
W.
An electric shock may occur.
• The inverter can easily accept high-speed operation. When changing the speed setting, carefully check
the specifications of motors or equipment beforehand.
Otherwise, injuries could occur.
• Do not touch the heat sink because it becomes very hot.
Doing so could cause burns.
• The DC brake function of the inverter does not provide any holding mechanism.
Injuries could occur.
• Ensure safety before modifying the function code settings.
Run commands (e.g., "Run forward" FWD, "Force to run" FMS), stop commands (e.g., "Coast to a stop"
BX), and frequency change commands can be assigned to digital input terminals. Depending upon the
assignment states of those terminals, modifying the function code setting may cause a sudden motor
start or an abrupt change in speed.
• When the inverter is controlled with the digital input signals, switching run or frequency command
sources with the related terminal commands (e.g., SS1, SS2, SS4, SS8, Hz2/Hz1, Hz/PID, IVS, LE and
FMS) may cause a sudden motor start or an abrupt change in speed.
• Ensure safety before modifying customizable logic related function code settings (U codes and related
function codes) or turning ON the "Cancel customizable logic" terminal command CLC. Depending
upon the settings, such modification or cancellation of the customizable logic may change the operation
sequence to cause a sudden motor start or an unexpected motor operation.
• If any abnormality is found in the inverter or motor, immediately stop it and perform troubleshooting,
referring to the FRENIC-HVAC User's Manual.
An accident or injuries could occur.
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