6.5 Other Errors
6-33
(7) The reference frequency was
below the starting or stop
frequency.
Check that a reference frequency has been entered correctly, using
Menu “I/O Checking” on the keypad.
➔ Set the reference frequency at the same or higher value than that of
the starting and stop frequencies (F23* and F25*).
➔ Reconsider the starting and stop frequencies (F23* and F25*), and
if necessary, change them to lower values.
➔ Inspect the external frequency command potentiometers, signal
converters, switches, and relay contacts. Replace any ones that are
faulty.
➔ Connect external circuit wirings of terminals [13], [12], [11], [C1],
and [V2] correctly.
(8) A frequency command with
higher priority than the one
attempted was active.
Based on the frequency setting block diagram (See Chapter 8 “BLOCK
DIAGRAMS FOR CONTROL LOGIC” ), check the data by function code
data check and I/O checking from Menu using the keypad.
➔ Correct any incorrect function code data (e.g. cancel the higher
priority run command).
(9) The upper and lower
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.
(10) The coast-to-stop command
was effective.
Check the data of the function codes (E01 to E09, E98, E99), and check
the input state by using “I/O Checking” from the Menu on the keypad.
➔ Release the coast-to-stop command setting.
idLE is displayed while the coast-to-stop command is being
entered.
(11) Broken wires, incorrect
connection or poor contact with
the motor.
Check the wiring (Measure the output current).
➔ Repair the wires to the motor, or replace them.
Measure the inverter output current.
➔ Reduce the load (In winter, the load tends to increase.)
Check whether any mechanical brake is applied.
➔ Release the mechanical brake.
(13) Torque generated by the motor
was insufficient.
Check that the motor starts running if the value of the torque boost
(F09*) is increased.
➔ Increase the value of torque boost (F09*).
Check the data of function codes (F04*, F05*, H50, H51, H52, H53,
H65, and H66).
➔ Change the V/f pattern to match the motor's characteristics.
Check that the motor switching signal (selecting motor 1 - 4) is correct
and the data of function codes matches each motor.
➔ Correct the motor switching signal.
➔ Modify the function code data to match the connected motor.
Check whether the reference frequency is below the slip frequency of
the motor.
➔ Change the reference frequency so that it becomes higher than the
slip frequency of the motor.
(14) Wrong connection or poor
contact of DC reactor.
Check the wiring. If using motors with output of 75 kW or higher, be sure
to use a DC reactor (option).
➔ Connect the DCR correctly. Repair or replace DCR wires.
(15) Simulated operation mode
Check whether the function code (H00) is 1 (simulated operation mode).
➔ Set the function code (H00) to 0 (normal running mode).
The explanations for function codes with an asterisk (*) are limited to motor 1. If using motor 2 to 4, replace
with the relevant function codes in Chapter 5 "Table 5.3-21 Function codes to be switched".
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