Maeda MK0003, Service Manual, Page: 315 / 348

5-21
Symptom Content of the likely cause Countermeasures
Reference
The frequency
cannot be set in
the output
frequency
setting/monitor
(F001) with the
operator. The operator is not set as the primary
frequency command selection (A001). Set “02: operator” as the primary frequency
command selection (A001).
“51: F-TM (force terminal block)” is
assigned to the multi function input
terminal, and it is in ON state. Turn OFF the assigned terminal.
The specified
parameter is not
displayed. “01: individual function display” or “04:
basic display” is set as the display
selection (b037). Set “00: display all” as the display selection (b037).
“86: DISP (fixed display)” is assigned to
the multi function input terminal, and it
is in ON state. Turn OFF the assigned terminal.
The operator key
does not function. “86: DISP (fixed display)” is assigned to
the multi function input terminal, and it
is in ON state. Turn OFF the assigned terminal.
The parameters
cannot be
changed. The inverter is running. Stop the inverter, and reset the settings after the
motor slows down and stops. If set to the mode
where changes are permitted while running (b031 =
10), some of the parameters can be changed while
running.
Soft locked. Disable the soft lock selection (b031).
The motor is
reverse rotating. The phase sequence of the wirings to
the motor is incorrect. (The phase
sequence specification of the motor
itself is U/T1, V/T2, W/T3, and not in
normal rotation.) Either reverse two wires of U/T1, V/T2, W/T3, or
match to the phase sequence of the motor.
The 3 wire input function is used, and
the non-inversed rotation/inversed
rotation logic is incorrect. Check the “22: F/R (3 wire non-inversed/inversed)”
logic of the multi function input terminal.
The motor runs in
inversed rotation
when run with the
RUN key. The run direction selection (F004) is
incorrect. Change the run direction selection (F004) setting.
Trips with the
overcurrent
protection (E03)
when running. The acceleration time is too short. Extend the acceleration time
(F002/F202/A092/A292).
Use a run pattern where the acceleration is
temporary paused with the
acceleration/deceleration stop function.
Excessive load. Reduce the load.
Tune with the torque boost function.
Set “02: free V/f setting” or “03: sensor less vector
control” for the control method (A044/A244) and
tune.
Overload restriction (b021/b024) is in
“00: disable”. Enable the overload restriction (b021/b024).
[If tripping occurs when running due to overcurrent, regardless of the overload restriction being
enabled]
Overload restriction level (b022/b025)
is high. Reduce the overload restriction level (b022/b025).
Overload restriction invariable
(b023/b026) is short. Raise the overload restriction invariable
(b023/b026).
The STOP/RESET
key does not
function. The STOP/RESET key is set to disable. Properly set the stop key selection (b087).
The deceleration overcurrent restriction
function (b130) is enabled. Set the deceleration overcurrent restriction function
(b130) to “00: disable”, or adjust the operation level
of each function.
Momentary stop/UV deceleration stop
function selection (b050) is enabled. Set the momentary stop/UV deceleration stop
function selection (b050) to “00: disable”, or adjust
the operation level of each function.