The Motor Rotates In The Opposite Direction From The Run Command; The Motor Rotates In Only One Direction; The Motor Is Too Hot - YASKAWA CIPR-GA50C series Technical Manual

7.10 Troubleshooting Without Fault Display
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The Motor Rotates in the Opposite Direction from the Run Command

Causes
The phase wiring between the drive and motor is incorrect.
The forward direction for the motor is set incorrectly.
The signal connections for forward run and reverse run on the drive control
circuit terminals and control panel side are incorrect.
The motor is running at almost 0 Hz and the Speed Search estimated the
speed to be in the opposite direction.
◆

The Motor Rotates in Only One Direction

Causes
The drive will not let the motor rotate in reverse.
The drive did not receive a Reverse run signal and 3-Wire sequence is
selected.
◆

The Motor Is Too Hot

Causes
The load is too heavy.
The motor is running continuously at a very low speed.
The drive is operating in a vector control mode, but Auto-Tuning has not
been done.
The voltage insulation between motor phases is not sufficient.
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Possible Solutions
• Examine the wiring between the drive and motor.
• Connect drive output terminals U/T1, V/T2, and W/T3 in the correct sequence to agree with
motor terminals U, V, and W.
• 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 correct sequence to agree with
motor terminals U, V, and W.
• Switch two motor cables U, V, and W to reverse motor direction.
A - For
ward
Rota
tion
Direc
tion
Figure 7.1 Forward Rotating Motor
Note:
• For Yaskawa motors, the forward direction is counterclockwise when looking from the
motor shaft side.
• Refer to the motor specifications, and make sure that the forward rotation direction is
correct for the application. The forward rotation direction of motors can be different for
different motor manufacturers and types.
Correctly wire the control circuit.
Set b3-14 = 0 [Bi-directional Speed Search = Disabled], then the drive will only do speed search
in the specified direction.
Possible Solutions
Set b1-04 = 0 [Reverse Operation Selection = Reverse Enabled].
Turn ON the terminals to which H1-xx = 0 [3-Wire Sequence] is set, and then enable reverse
operation.
Possible Solutions
• Decrease the load.
• Increase the acceleration and deceleration times.
• Examine the values set in L1-01 [Motor Overload (oL1) Protection], L1-02 [Motor Overload
Protection Time], and E2-01 [Motor Rated Current (FLA)].
• Use a larger motor.
Note:
The motor also has a short-term overload rating. Examine this rating carefully before setting
drive parameters.
• Change the run speed.
• Use a drive-dedicated motor.
• Do Auto-Tuning.
• Calculate motor parameter and set motor parameters.
• Set A1-02 = 0 [Control Method Selection = V/f Control].
• Use a motor with a voltage tolerance that is higher than the maximum voltage surge.
• Use a drive-dedicated motor that is rated for use with AC drives for applications that use a
motor on drives rated higher than 400 V class.
• Install an AC reactor on the output side of the drive and set C6-02 = 1 [Carrier Frequency
Selection = 2.0 kHz].
Note:
When the motor is connected to the drive output terminals U/T1, V/T2, and W/T3, surges
occur between the drive switching and the motor coils. These surges can be three times the
drive input power supply voltage (600 V for a 200 V class drive, 1200 V for a 400 V class
drive).
YASKAWA SIEPC71061753A GA500 Technical Manual
A
B
B - Load
Shaft