6-1
Chapter 6 TROUBLESHOOTING
6.1 Before Proceeding with Troubleshooting
If any of the protective functions have been activated, first remove the cause. Then, after
checking that the all run commands are set to off, reset the alarm. Note that if the alarm is reset
while any run commands are set to on, the inverter may supply the power to the motor which may
cause the motor to rotate.
Injury may occur.
-
Even though the inverter has interrupted power to the motor, if the voltage is applied to the
main circuit power input terminals L1/R, L2/S and L3/T (L1/L and L2/N for single-phase
voltage input), voltage may be output to inverter output terminals U, V, and W.
- Turn OFF the power and wait more than five minutes. Make sure that the LED monitor is
turned OFF. Further, make sure, using a multimeter or a similar instrument, that the DC link
bus voltage between the terminals P (+) and N (-) has dropped below the safe voltage (+25
VDC).
Electric shock may occur.
Follow the procedure below to solve problems.
(1) First, check that the inverter is correctly wired, referring to Chapter 2 Section 2.3.5 "Wiring for
main circuit terminals and grounding terminals."
(2) Check whether an alarm code is displayed on the LED monitor.
If any problems persist after the above recovery procedure, contact your Fuji Electric representative.
Summary of Contents for FRENIC-Multi series
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