HOA Keypad Display
Minor Fault Name
Hbb
Safe Disable Signal Input
Both Safe Disable Input channels are open.
Cause
Possible Solution
Both Safe Disable Inputs H1 and H2 are
open.
• Check signal status at the input terminals H1 and H2.
• Check the Sink/Source Selection for the digital inputs.
• If the Safe Disable function is not utilized, determine if terminals H1-HC, and H2-HC are linked.
Internally, both Safe Disable channels are
broken.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display
Minor Fault Name
HbbF
Safe Disable Signal Input
One Safe Disable channel is open while the other channel is closed.
Cause
Possible Solution
The signals to the Safe Disable inputs are
wrong or the wiring is incorrect.
Check signal status at the input terminals H1 and H2. If the Safe Disable function is not utilized, terminals
H1-HC, and H2-HC must be linked.
One of the Safe Disable channels is faulty. Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
HOA Keypad Display
Minor Fault Name
HCA
Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Cause
Possible Solutions
Load is too heavy.
Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the drive.
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 C1-04).
• Increase the capacity of the drive.
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.
The current level increased due to Speed
Search after a momentary power loss or
while attempting to perform a fault restart.
The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in
such instances.
HOA Keypad Display
Minor Fault Name
HIAUX
High PI Aux Lvl
High PI Auxiliary Feedback Level
Cause
Possible Solution
PI Aux Feedback has risen above the Q6-12
level for longer than the time set in Q6-13
and the drive is running in AUTO, and
output frequency is greater than zero.
• Lower the PI Aux Feedback level
• Adjust parameters Q6-12 and Q6-13.
HOA Keypad Display
Minor Fault Name
HIFLO
High Flow
High Flow Error
The meter has detected a high flow condition.
Cause
Possible Solution
The flow is too high
Reduce the flow
The measured water flow has risen above
the P6-17 level for the time set in P6-18.
This is only effective when P6-19, High
Flow Select is set to 1 (alarm).
• Set the High Flow fault characteristics in P6-17 and P6-18.
• Drive response to this condition is controlled by P6-19, High Flow Select.
• Auto-restart of this fault is controlled by P6-19, High Flow Select.
HOA Keypad Display
Minor Fault Name
High Feedback High FB Sensed
High Feedback Level Alarm
The feedback signal is too high.
Cause
Possible Solutions
5.4 Alarm Detection
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YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
