6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual 277
Digital Operator Display Minor Fault Name
FbL
PI Feedback Loss
The PI feedback input is lower than the level set in b5-13 for longer than the time set in b5-14, and b5-12 is set to 1 or 4.
Cause Possible Solutions
Parameters settings for b5-13 and b5-14 are
incorrect.
Check parameters b5-13 and b5-14.
PI 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
Hbb
Hardwire Baseblock Signal Input
Both Hardwire Baseblock Input channels are open.
Cause Possible Solutions
Both Hardwire Baseblock 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 Hardwire Baseblock function is not utilized, check if the terminals H1-HC, and H2-HC are linked.
Internally, both Hardwire Baseblock 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
Hardwire Baseblock Signal Input
One Hardwire Baseblock channel is open while the other one is closed.
Cause Possible Solutions
The signals to the Hardwire Baseblock inputs are
wrong or the wiring is incorrect.
Check signal status at the input terminals H1 and H2. If the Hardwire Baseblock function is not utilized, the terminals H1-HC, and
H2-HC must be linked.
One of the Hardwire Baseblock 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. Either reduce the load for applications with repetitive operation (repetitive stops and starts, etc.), 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 appear only 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: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
Cause Possible Solutions
The cooling fan has reached 90% of its expected
performance life.
Replace the cooling fan and reset the Maintenance Monitor by setting o4-03 to 0.
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: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
Cause Possible Solutions
The main circuit and control circuit capacitors have
reached 90% 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.
Digital Operator Display Minor Fault Name
LT-3
Soft Charge Bypass Relay Maintenance Time
The DC bus soft charge relay is nearing the end of its expected performance life.
Note: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
Cause Possible Solutions
The DC bus soft charge relay has reached 90% 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.
Digital Operator Display Minor Fault Name
LT-4
IGBT Maintenance Time (50%)
IGBTs have reached 50% of their expected performance life.
Note: An alarm output (H2- = 10) will only be triggered if H2- = 2F.
Cause Possible Solutions
IGBTs have reached 50% of their expected
performance life.
Check the load, carrier frequency, and output frequency.
SIEP_C710616_35.book 277 ページ ２０１５年１１月３０日 月曜日 午後２時２分
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