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Digital Operator Display
Minor Fault Name
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
An external device has tripped an alarm
function.
Remove the cause of the external fault and reset the multi-function input value.
YES
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.
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.
Digital 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 Solution
Minor Fault
(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.
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
Feedback input circuit is damaged.
Replace the drive.
Digital 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 Solution
Minor Fault
(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.
Feedback sensor has malfunctioned.
Check the sensor and replace it if damaged.
Feedback input circuit is damaged.
Replace the drive.
Digital Operator Display
Minor Fault Name
Hbb
Safe Disable Signal Input
The Safe Disable Input channel is open.
Cause
Possible Solution
Minor Fault
(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.
Digital Operator Display
Minor Fault Name
HbbF
Safe Disable Signal Input
The safe disable input hardware is defective.
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
One of the Safe Disable channels is faulty.
Replace the drive.
YES
Digital Operator Display
Minor Fault Name
HCA
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Cause
Possible Solution
Minor Fault
(H2-
oo
= 10)
6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
285
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Troubleshooting