YASKAWA J1000 Technical Manual page 149

6.8 Troubleshooting without Fault Display
Cause
Multi-function analog input is
set up to accept gain for the
frequency reference, but no
voltage (current) has been
provided.
STOP
The button was pressed
when the drive was started from
a REMOTE source.
Motor is not producing enough
torque.
The drive is set for both 2-Wire
and 3-Wire sequence at the same
time.
n Motor Rotates in the Opposite Direction from the Run Command
Cause
Phase wiring between the drive and motor is incorrect.
The forward direction for the motor is setup incorrectly.
Note: Check the motor specifications for the forward and reverse directions. The motor specifications will vary depending on the manufacturer
of the motor.
n Motor is Too Hot
Cause
The load is too heavy.
The air around the motor is too hot.
Insufficient voltage insulation between motor phases.
The motor fan has stopped or is clogged.
148
• Check the multi-function analog input settings.
• Check if H3-02 has been set to the proper values.
• Check if the analog input value has been set properly.
•
STOP
When the button is pressed, the drive will decelerate to stop.
• Switch off the run command and then re-enter a run command.
•
STOP
The button is disabled when o2-02 is set to 0.
• Ensure the selected V/f pattern corresponds with the characteristics of the motor being used.
• Increase both the minimum and mid output frequency voltages (E1-08, E1-10).
Increase the frequency reference so that it is higher than the minimum frequency reference (E1-09).
Increase the torque compensation gain (C4-01).
• The drive is set for a 3-Wire sequence when one of the parameters H1-03 through H1-05 is set to 0.
• If the drive is supposed to be set up for a 2-Wire sequence, then ensure parameters H1-03 through H1-05 are not set
to 0.
• If the drive is supposed to be set up for a 3-Wire sequence, then H1-oo must be set to 0.
• Check the motor wiring.
• Switch two motor cables (U, V, and W) to reverse motor direction.
• Connect drive output terminals U/T1, V/T2 and W/T3 in the right order to the corresponding
motor terminals U, V, and W.
• Change the setting of parameter b1-14.
Typically, forward is designated as being counterclockwise when looking from the motor shaft
(refer to the figure below).
1. Forward Rotating Motor (looking down the motor shaft)
2. Motor Shaft
If the load is too heavy for the motor, the motor will overheat as it exceeds its rated torque value
for an extended period of time.
Keep in mind that the motor also has a short-term overload rating in addition to the possible
solutions provided below:
• Reduce the load.
• Increase the acceleration and deceleration times.
• Check the values set for the motor protection (L1-01, L1-02) as well as the motor rated current
(E2-01).
• Increase motor capacity.
• Check the ambient temperature.
• Cool the area until it is within the specified temperature range.
When the motor is connected to terminals U/T1, V/T2, and W/T3, voltage surges occur between
the motor coils and drive switching.
Normally, surges can reach up to three times the drive input power supply voltage (600 V for
200 V class, and 1200 V for 400 V class).
• Use a motor with voltage tolerance higher than the max voltage surge.
• Use a motor designed to work specifically with a drive when using a 400 V class unit.
• Install an AC reactor on the output side of the drive.
Check the motor fan.
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Possible Solutions
Possible Solutions
Possible Solutions
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
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