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6-3
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 to the FRENIC-Mini User's Manual, Chapter 4.
Î
Correct any incorrect function code data (e.g. cancel the higher
priority run command).
(8) 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)).
Î
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 through E03, E98 and E99
and the input signal status, using Menu #4 "I/O Checking" on the
keypad.
Î
Release the coast-to-stop command setting.
(10) Broken wire, incorrect
connection or poor
contact with the motor.
Check the wiring (Measure the output current).
Î
Repair the wires to the motor, or replace them.
Measure the output current.
Î
Reduce the load (In winter, the load tends to increase.)
(11) Overload
Check that any mechanical brake is activated.
Î
Release the mechanical brake, if any.
Check that the motor starts running if the value of torque boost
(F09, A05) is increased.
Î
Increase the value of torque boost (F09, A05) and try to run the
motor.
Check the data of function codes F04, F05, H50 through H53, A02,
and A03.
Î
Change the V/f pattern to match the motor's characteristics.
Check that the motor switching signal (selecting motor 2 or 1) is
correct and the data of function codes matches each motor.
Î
Correct the motor switching signal.
Î
Modify the function code data to match the connected motor.
(12) Torque generated by
the motor was
insufficient.
Check whether the reference frequency signal is below the
slip-compensated frequency of the motor.
Î
Change the reference frequency signal so that it becomes higher
than the slip-compensated frequency of the motor.
(13) Wrong connection or
poor contact of DC
reactor (DCR).
Check the wiring.
Î
Connect the DCR correctly. Repair or replace DCR wires.