Troubleshooting
7
7.10 Troubleshooting Without Fault Display
YASKAWA SIEPYEULA5001C LA500 Technical Manual 201
◆ The Starting Torque Is Not Sufficient
Causes Possible Solutions
Auto-Tuning has not been done in vector control method. Do Auto-Tuning.
The control method was changed after doing Auto-Tuning. Do Auto-Tuning again.
Stationary Auto-Tuning for Line-to-Line Resistance was done. Do Rotational Auto-Tuning.
◆ The Output Frequency Is Lower Than the Frequency Reference
Causes Possible Solutions
A large load triggered Stall Prevention function during acceleration. • Decrease the load.
• Adjust L3-02 [Stall Prevent Level during Accel].
L3-01 = 3 [Stall Prevent Select duringAccel = ILim Mode] has been set. 1. Check whether the V/f pattern and motor parameter settings are appropriate, and set them
correctly.
2. If this does not solve the problem, and it is not necessary to limit the current level of stall
during acceleration, adjust L3-02.
3. If this does not solve the problem, set L3-01 = 1 [Enabled].
The motor is rotating at this speed:
S1-02 [DC Injection/Zero SpeedThreshold] ≤ Motor Speed < E1-09
[Minimum Output Frequency]
Set E1-09 < S1-02.
◆ The Motor Will Not Restart after a Loss of Power
Causes Possible Solutions
The drive did not receive a Run command after applying power. • Examine the sequence and wiring that enters the Run command.
• Set up a relay to make sure that the Run command stays enabled during a loss of power.
For applications that use 3-wire sequence, the momentary power loss
continued for a long time, and the relay that keeps the Run command has
been switched off.
Examine the wiring and circuitry for the relay that keeps the Run command enabled during the
momentary power loss ride-thru time.
To Next Page
Loading...
