YASKAWA T1000V Technical Manual page 272

6.9 Troubleshooting without Fault Display
Cause
The drive has been set to accept
the frequency reference from the
incorrect source.
The terminal set to accept the main
speed reference is set to the
incorrect voltage and/or current.
Selection for the sink/source mode
is incorrect.
Frequency reference is too low.
Multi-function analog input is set
up to accept gain for the frequency
reference, but no voltage (current)
has been provided.
The button was pressed
STOP
when the drive was started from a
REMOTE source.
Motor is not producing enough
torque in the V/f motor control
method.
Motor is not producing enough
torque in Open Loop Vector
Control.
The drive is set for both 2-Wire
and 3-Wire sequence at the same
time.
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.
The motor is running at almost 0 Hz and the Speed
Search estimated the speed to be in the opposite
direction.
Note: Check the motor specifications for the forward and reverse directions. The motor specifications will vary depending on the
manufacturer of the motor.
272
Check parameter b1-01 (Frequency Reference Source 1).
Set b1-01 to the correct source of the frequency reference.
0: LED operator
1: Control circuit terminal (default setting)
2: MEMOBUS/Modbus communications
3: Option card
4: Pulse train input (RP)
If the frequency reference is set at terminal A1, check parameter H3-01 for the correct signal level selection. If
terminal A2 is used, check DIP switch S1. Then select the correct input level for terminal A2 in parameter
H3-08. Refer to DIP Switch S1 Analog Input Signal Selection on page
Check DIP switch S3. Refer to Sinking/Sourcing Mode Switch on page
• Check the frequency reference monitor (U1-01).
• Increase the frequency by changing the maximum output frequency (E1-09).
• Check the multi-function analog input settings.
• Check if analog input A1 or A2 is set for frequency reference gain (H3-02 or H3-10 = 1). If so, check if the
correct signal is applied to the terminal. The gain and the frequency reference will be 0 if no signal is applied
to the gain input.
• Check if H3-02 and H3-10 have been set to the proper values.
• Check if the analog input value has been set properly.
• When the button is pressed, the drive will decelerate to stop.
STOP
• Switch off the run command and then re-enter a run command.
• The button is disabled when o2-02 is set to 0.
STOP
Ensure the selected V/f pattern corresponds with the characteristics of the motor being used.
Increase the frequency reference so that it is higher than the minimum frequency reference (E1-09).
Perform Line-to-Line Resistance Auto-Tuning when using particularly long motor cables.
Increase the torque compensation gain (C4-01).
• Execute Rotational Auto-Tuning.
• If the motor cables are replaced with longer cables after Rotational Auto-Tuning was performed,
Auto-Tuning may need to be repeated due to voltage drop across the line.
• Check if the torque limit parameters have been set too low (L7-01 through L7-04).
• Reset the torque limit back to its default setting (200%).
Increase both the minimum and mid output frequency voltages (E1-08 and E1-10).
• The drive is set for a 3-Wire sequence when one of parameters H1-03 through H1-06 is set to 0.
• If the drive is supposed to be set up for a 2-Wire sequence, then ensure parameters H1-03 through H1-06 are
not set to 0.
• If the drive is supposed to be set up for a 3-Wire sequence, then H1-
• 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
• Disable bi-directional search (b3-14 = "0") so that Speed Search is performed only in the
specified direction.
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Possible Solutions
Possible Solutions
1
2
64.
62.
must be set to 0.