Instruction manual

10-10
[ 8 ] The motor abnormally heats up.
Possible Causes
What to Check and Suggested Measures
(1) Excessive torque boost
specified.
Check whether decreasing the torque boost (F09*) decreases the output
current but does not stall the motor.
 If no stall occurs, decrease the torque boost (F09*).
(2) Continuous running in
extremely slow speed.
Check the running speed of the inverter.
 Change the speed setting or replace the motor with a motor exclusively
designed for inverters.
(3) Overload.
Measure the inverter output current.
 Reduce the load (For fans or pumps, decrease the frequency limiter value
(F15).) (In winter, the load tends to increase.)
[ 9 ] The motor does not run as expected.
Possible Causes
What to Check and Suggested Measures
(1) Incorrect setting of function
code data.
Check that function codes are correctly configured and no unnecessary
configuration has been done.
 Configure all the function codes correctly.
Make a note of function code data currently configured and then initialize all
function code data using H03.
 After the above process, reconfigure function codes one by one, checking
the running status of the motor.
(2) Running on single-phase power
 Refer to Section 10.7 "If the Inverter is Running on Single-Phase Power,"
[ 3 ].