5.6 Alarm Detection
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07) 229
Troubleshooting
5
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Feedback sensor has malfunctioned. Check the sensor and replace it if damaged. YES
Feedback input circuit is damaged. Replace the drive. YES
LED Operator Display Minor Fault Name
Hbb
Hardwire Baseblock Signal Input
Hardwire Baseblock input signal open.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Internally, both Hardwire Baseblock
channels are broken.
Replace the drive. YES
There is no signal at terminal H1.
Check the wiring of terminal H1.
Check if the PLC signal is set correctly.
YES
LED Operator Display Minor Fault Name
HbbF
Hardwire Baseblock Signal Input
One of the baseblock channels is damaged.
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
One of the baseblock channels is
faulty.
Replace the drive. YES
LED Operator Display Minor Fault Name
HCA
Current Alarm
Drive current has exceeded the overcurrent warning level (150% of the rated
current).
Cause Possible Solutions
Minor Fault
Output
(H2- = 10)
Load is too heavy.
• Measure the current flowing through the motor.
• Reduce the load or increase the capacity of the drive.
YES
Acceleration and deceleration times
are too short.
• Calculate the torque required during acceleration and for
the inertia moment.
• If the torque level is not right for the load, take the
following steps:
• Increase the acceleration and deceleration times
(C1-01 through C1-08).
• Increase the capacity of the drive.
YES
A special-purpose motor is being
used, or the drive is attempting to run
a motor greater than the maximum
allowable capacity.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is
within the allowable capacity range.
YES
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