Digital Operator Display
Minor Fault Name
FbH
Excessive PID Feedback
The PID feedback input is higher than the level set to b5-36 for longer than the time set to b5-37, and b5-12
is set to 1 or 4.
Cause
Possible Solutions
Parameter settings for b5-36 and b5-37 are
incorrect.
Check parameters b5-36 and b5-37.
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 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
FbL
PID Feedback Loss
The PID feedback input is lower than the level set to b5-13 for longer than the time set to b5-14.
Cause
Possible Solutions
Parameter settings for b5-13 and b5-14 are
incorrect.
Check parameters b5-13 and b5-14.
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 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 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.
Digital Operator Display
Minor Fault Name
ILIM
Cur Lim Foldback
<0x59>
Current Limit Foldback
Drive output speed is being limited due to the output current limit.
Cause
Possible Solutions
Excessive load
Reduce the load or replace the drive with a higher capacity drive.
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.
6.5 Alarm Detection
314
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
