YASKAWA P1000 Technical Manual page 314

6.5 Alarm Detection
Digital Operator Display
Cause
Parameter settings for b5-36 and b5-37 are
incorrect.
PID feedback wiring is faulty.
Feedback sensor has malfunctioned.
Feedback input circuit is damaged.
Digital Operator Display
Cause
Parameter settings for b5-13 and b5-14 are
incorrect.
PID feedback wiring is faulty.
Feedback sensor has malfunctioned.
Feedback input circuit is damaged.
Digital Operator Display
Cause
Load is too heavy.
Acceleration and deceleration times are too
short.
A special-purpose motor is being used, or
the drive is attempting to run a motor
greater than the maximum allowable
capacity.
The current level increased due to Speed
Search after a momentary power loss or
while attempting to perform a fault restart.
Digital Operator Display
ILIM
Cur Lim Foldback
<0x59>
Cause
Excessive load
Digital Operator Display
Cause
The cooling fan has reached 90% of its
expected performance life.
314
Excessive PID Feedback
FbH
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.
Check parameters b5-36 and b5-37.
Correct the wiring.
Check the sensor and replace it if damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
PID Feedback Loss
FbL
The PID feedback input is lower than the level set to b5-13 for longer than the time set to b5-14.
Check parameters b5-13 and b5-14.
Correct the wiring.
Check the sensor and replace it if damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Current Alarm
HCA
Drive current exceeded overcurrent warning level (150% of the rated current).
Reduce the load for applications with repetitive operations (i.e., stops and starts), or replace the drive.
• 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.
• Check the motor capacity.
• Use a motor appropriate for the drive. Ensure the motor is within the allowable capacity range.
The alarm will only appear briefly. There is no need to take action to prevent the alarm from occurring in
such instances.
Current Limit Foldback
Drive output speed is being limited due to the output current limit.
Reduce the load or replace the drive with a higher capacity drive.
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
LT-1
Note: The signal closes when the maintenance period ends if H2-oo = 2F. The signal will not close
if H2-oo = 10.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual