Omron MX2 User Manual

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Troubleshooting Section 6-1
7. Parameter data does not change.
8. Motor rotates reverse direction with forward command.
9. Motor rotates reverse direction with RUN key of keypad.
10. Overcurrent trip (E03)
11. STOP/RESET key does not respond.
12. Sound noise of motor or machine.
Possible Cause(s) Corrective Action
Inverter is in RUN status. Stop the inverter, make sure the motor stops and
try again. If "RUN mode edit" is enabled, a part of
function codes can be changed in RUN status.
Software lock function (b031) is
enabled.
Disable software lock function.
Possible Cause(s) Corrective Action
Incorrect power wiring. Exchange any two of U/T1, V/T2 or W/T3.
Incorrect logic of direction signal
in 3-wire operation.
Check the logic of input set as "22:F/R".
Possible Cause(s) Corrective Action
Keypad RUN key routing (F004) is
incorrectly set.
Check F004.
Possible Cause(s) Corrective Action
Acceleration time is short. Change acceleration time (F002/A092/A292).
Enable "acceleration hold" function (A069, A070)
Excess load. Remove excess load.
Enable torque boost function.
Set free V/f in V/F characteristic curve selection
(A044/A244=02)
Overload restriction (b021)
is disabled (00).
Enable overload restriction (b021=01/02/03).
Despite overload restriction is enabled, the inverter trips due to Overcurrent (E03).
Overload restriction level
(b022/b025) is high.
Set overload restriction level (b022/b025) lower.
Deceleration rate at overload
restriction (b023/b026) is too
short.
Set deceleration rate at overload restriction
(b023/b026) longer.
Possible Cause(s) Corrective Action
STOP/RESET key disabled. Check "STOP key enable" function. (b087)
Deceleration overvoltage sup-
pression (b130) or controlled
deceleration on power loss (b050)
function is enabled.
Check b130
and b050.
Possible Cause(s) Corrective Action
Carrier frequency is low. Set carrier frequency (b083) higher. (This could
cause electric noise and leak current higher.)
Machine frequency and motor
frequency are resonated.
Change output frequency slightly. If resonating in
accel/deceleration, use jump frequency function
(A063-68) to avoid machine frequency.
Over excitation Set base frequency (A003/A203) and AVR voltage
(A082/A282) according to motor rating. If not
improved, reduce V/f gain (A045/A245) slightly or
change V/f curve (A044/A244) as free V/f.

Omron MX2 Specifications

General

Brand	Omron
Model	MX2
Category	Inverter
Language	English