Fuji Electric FRENIC MEGA G2 Series - 22 ] Err Simulated Failure; 23 ] Fus Blown Fuse; 24 ] Fal DC Fan Lock; 25 ] Lin Input Phase Loss

6.3 If an Alarm Code Appears on the LED Monitor
6-19
TROUBLESHOOOTING
Chap 6
[ 22 ] err Simulated failure
Phenomenon: The LED displays the alarm err.
Possible cause
Check and measures
(1) Keep key + key
pressed for five seconds or
longer.
➔ To escape from this alarm state, press the key.
(2) Set function code H45
(simulation fault) to “1”.
[ 23 ] fUs Blown fuse
Phenomenon: The fuse inside the inverter is blown.
Possible cause
Check and measures
(1) The fuse blew due to shorting of
the inverter internal circuits.
Check whether excessive external surge or noise has occurred.
➔ Take surge and noise countermeasures.
➔ Consult your Fuji Electric representative for repair.
[ 24 ] fAL DC fan lock
Phenomenon: An inverter internal DC fan lock was detected.
Possible cause
Check and measures
(1) Inverter internal cooling fan
error
Failure of the air circulation fan inside the inverter
(FRN0215G2S-2G/FRN0180G2■-4G or above)
➔ Replace the cooling fan.
[ 25 ] lin Input phase loss
Phenomenon: Input phase loss occurred, or interphase voltage unbalance rate was large.
Possible cause
Check and measures
(1) Breaks in wiring to the main
power input terminals.
Measure the input voltage.
➔ Repair or replace the main circuit power input wires or input devices
(MCCB, MC, etc.).
(2) The screws on the main power
input terminals are loosely
tightened.
Check if the screws on the main power input terminals have become
loose.
➔ Tighten the terminal screws to the recommended torque.
(3) Interphase voltage unbalance
among three phases was too
large.
Measure the input voltage.
➔ Connect an AC reactor (ACR) to lower the voltage unbalance
between input phases.
➔ Increase the inverter capacity.
(4) Overload cyclically occurred.
Measure the ripple wave of the DC intermediate circuit voltage.
➔ If the ripple is large, increase the inverter capacity.
(5) Single-phase voltage was input
to the three-phase input
inverter.
Check the inverter type.
➔ Apply three-phase power.
The purpose of this function is to protect the inverter. Even with open phase input, if the motor load is
light, the motor may continue to run without being detected.
The input phase loss protection can be disabled with the function code H98.