6-4
Possible Causes What to Check and Suggested Measures
(7) A frequency command
with higher priority than
the one attempted was
active.
Check the higher priority run command with Menu #2 "Data
checking" and Menu #4 "I/O checking" using the keypad,
referring to the block diagram of the drive command generator.
*Refer the FRENIC-Mini User’s Manual (MEH446), Chapter 4.
Correct any incorrect function code data settings (e.g.
cancel the higher priority run command).
(8) The peak and bottom
frequencies for the
frequency limiters were
set incorrectly.
Check the data of function codes F15 (frequency limiter (high))
and F16 (frequency limiter (low)).
Change the settings of F15 and F16 to the correct ones.
(9) The coast-to-stop
command was effective.
Check the data of function codes E01, E02, E03, E98 and E99
and the input signal status with Menu #4 "I/O checking" using
the keypad.
Release the coast-to-stop command setting.
(10) Broken wire, incorrect
connection or poor contact
with the motor.
Check the cabling and wiring (Measure the output current).
Repair the wires to the motor, or replace them.
Measure the output current.
Lighten the load.
(11) Overload
Check that a mechanical brake is in effect.
Release the mechanical brake, if any.
Check that the motor starts running if the value of torque boost
(F09) is increased.
Increase the value of torque boost (F09) and try to run the
motor.
(12) Torque generated by the
motor was insufficient.
Check the data of function codes F04, F05, H50, and H51.
Change the V/f pattern to match the motor's characteristics.
[ 2 ] The motor rotates, but the speed does not increase.
Possible Causes What to Check and Suggested Measures
(1) The maximum frequency
currently specified was too
low.
Check the data of function code F03 (Maximum frequency).
Readjust the data of the maximum frequency (F03).
(2) The data of frequency
limiter currently specified
was too low.
Check the data of function code F15 (Frequency limiter (high)).
Readjust the setting of F15.
(3) The reference frequency
currently specified was too
low.
Check the signals for the frequency command from the control
circuit terminals with Menu #4 "I/O checking" using the keypad.
Increase the frequency of the command.
If an external potentiometer for frequency command, signal
converter, switches, or relay contacts are malfunctioning,
replace them.
Connect the external circuit wires to terminals [13], [12],
[11], and [C1] correctly.
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