Wiring is incorrect.
• Ensure the signal lines have been connected properly to the terminals assigned for
external fault detection (H1-oo = 20 to 2F).
• Reconnect the signal line.
YES
Multi-function contact inputs are set
incorrectly.
•
Check if the unused terminals have been set for H1-oo = 20 to 2F (
External Fault).
• Change the terminal settings.
YES
LED Operator Display Minor Fault Name
FbH
Excessive PID Feedback
The PID feedback input is higher than the level set in b5-36 for longer than the time set in b5-37, and
b5-12 is set to 1 or 4.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Parameters settings for b5-36 and b5-37
are incorrect.
Check parameters b5-36 and b5-37. YES
PID feedback wiring is faulty. Correct the wiring. YES
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
FbL
PID Feedback Loss
The PID feedback input is lower than the level set in b5-13 for longer than the time set in b5-14, and
b5-12 is set to 1 or 4.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
Parameters settings for b5-13 and b5-14
are incorrect.
Check parameters b5-13 and b5-14. YES
PID feedback wiring is faulty. Correct the wiring. YES
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
Safe Disable Signal Input
The Safe Disable Input channel is open.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
There is no signal at terminal H1.
Check if external safety circuit tripped and disabled the drive. If the Safe Disable function
is not utilized, check if the terminals HC, H1, and H2 are linked.
YES
Internally, the Safe Disable channel is
broken.
Replace the drive. YES
LED Operator Display Minor Fault Name
HbbF
Safe Disable Signal Input
One of the Safe Disable input channels is open.
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
10)
One of the Safe Disable channels is faulty. Replace the drive. YES
LED Operator Display Minor Fault Name
HCA
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Cause Possible Solutions
Minor Fault
Output
(H2-oo =
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
6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
269
6
Troubleshooting
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