Digital Operator Display
Minor Fault Name
The detected power supply frequency
exceeded the allowable value.
Improve the power supply.
Digital Operator 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.
Digital Operator 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.
Digital Operator 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 use a larger drive.
Acceleration and deceleration times are too
short.
• Calculate the torque required during acceleration and for the moment of inertia.
• 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).
• Use a larger drive.
A special-purpose motor is being used, or
the drive is attempting to run a motor
greater than the rated output current.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is within the rated output current 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.
Digital Operator Display
Minor Fault Name
LT-1
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
Note:
The signal closes when the maintenance period ends if H2-
oo
= 2F. The signal will not close
if H2-
oo
= 10.
Cause
Possible Solutions
The cooling fan has reached 90% of its
expected performance life.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
Digital Operator Display
Minor Fault Name
LT-2
Capacitor Maintenance Time
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Note:
The signal closes when the maintenance period ends if H2-
oo
= 2F. The signal will not close
if H2-
oo
= 10.
Cause
Possible Solutions
The main circuit and control circuit
capacitors have reached 90% of their
expected performance lives.
Replace the drive.
6.5 Alarm Detection
388
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Summary of Contents for U1000 iQpump Drive
Page 705: ......
