YASKAWA P1000 Technical Manual page 208

6.5 Alarm Detection
HOA Keypad Display
Feedback sensor has malfunctioned
Feedback input circuit is damaged
HOA Keypad Display
FbL
Cause
Parameter settings for b5-13 and b5-14 are
incorrect
PI feedback wiring is faulty
Feedback sensor has malfunctioned
Feedback input circuit is damaged
HOA Keypad Display
HCA
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
HOA Keypad Display
inTLK
Cause
BAS Interlock multi-function input is open
HOA Keypad Display
LT-1
Cause
The cooling fan has reached 90% of its expected
performance life
HOA Keypad Display
LT-2
Cause
The main circuit and control circuit capacitors have
reached 90% of their expected performance lives
HOA Keypad Display
LT-3
Cause
208
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.
PI Feedback Loss
The PI feedback input is lower than the level set to b5-13 for longer than the time set to b5-14, and
b5-12 is set to 1 or 4.
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
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 to 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.
Interlock Open
ALM LED will not blink
Check the cause of interlock.
Cooling Fan Maintenance Time
The cooling fan has reached its expected maintenance period and may need to be replaced.
Replace the cooling fan and set o4-03 to 0 to reset the Maintenance Monitor.
Capacitor Maintenance Time
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
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