Fuji Electric FRENIC-Ace series - Before Proceeding with Troubleshooting; The Motor Rotates, but the Speed Does Not Increase

6.2 Before Proceeding with Troubleshooting
6-2
6.2 Before Proceeding with Troubleshooting
• If any of the protective functions has been activated, first remove the cause. Then, after checking that all run
commands are set to OFF, release the alarm. If the alarm is released while any run command is set to ON,
the inverter may supply the power to the motor, running the motor.
Injury may occur.
• Even though the inverter has interrupted power to the motor, if the voltage is applied to the main circuit input
terminals L1/R, L2/S, L3/T, L1/L and L2/N, voltage may be output to inverter output terminals U, V, and W.
• Turn OFF the power and wait for at least five minutes for inverters with a capacity of FRN0011E2■-7 /
FRN0115E2■-2 / FRN0072E2■-4 or below, or at least ten minutes for inverters with a capacity of
FRN0085E2■-4 or above. Make sure that the LED monitor or charging lamp are turned OFF. Further, make
sure, using a multimeter or a similar instrument, that the DC intermediate circuit voltage between the
terminals P (+) and N (-) has dropped to the safe level (+25 VDC or below).
Electric shock may occur.
Follow the procedure below to solve problems.
(1) Is wire connection correct?
See Chapter 2 “2.2.1 Basic connection diagram.”
(2) Check whether an alarm code or the “light alarm” indication (l-al) is displayed on the LED monitor.

If an Alarm Code Appears on the LED Monitor
To Section 6.3

If the “Light Alarm” Indication (
l-al
) Appears on the LED Monitor
To Section
6.4

When Codes Other Than Alarm Codes and Light Alarm Indication (
l-al
) are
Displayed
6.5
To Section 6.5
Abnormal motor operation
To Section 6.5.1
6.5.1 [ 1 ]
The motor does not rotate
6.5.1 [ 2 ]
The motor rotates, but the speed does not increase
6.5.1 [ 3 ]
The motor runs in the opposite direction to the command
6.5.1 [ 4 ]
Speed fluctuation or current oscillation (e.g., hunting) occurs during running at constant
speed
6.5.1 [ 5 ]
Unpleasant noises are emitted from motor or noises fluctuate
6.5.1 [ 6 ]
Motor is not accelerated or decelerated according to set-up acceleration or deceleration
times
6.5.1 [ 7 ]
The motor does not restart even after the power recovers from a momentary power failure
6.5.1 [ 8 ]
Motor generates heat abnormally
6.5.1 [ 9 ]
The motor does not run as expected
6.5.1 [ 10 ]
Motor stalls during acceleration
Problems with inverter settings
To Section 6.5.2
6.5.2 [ 1 ]
Nothing appears on the LED monitor
6.5.2 [ 2 ]
The desired menu is not displayed
6.5.2 [ 3 ]
Display of under bars (
____ )
6.5.2 [ 4 ]
Display of center bars (
----
)
6.5.2 [ 5 ]
c ] Display of parenthesis
6.5.2 [ 6 ]
Data of function codes cannot be changed
If any problems persist after the above recovery procedure, contact your Fuji Electric representative.