YASKAWA L1000A Technical Manual page 271

Multi-function contact inputs are set incorrectly.
Digital Operator Display
Hbb
Cause
Both Safe Disable Inputs H1 and H2 are open.
Internally, both Safe Disable channels are broken.
Digital Operator Display
HbbF
Cause
The signals to the Safe Disable inputs are wrong or
the wiring is incorrect.
One of the Safe Disable channels is faulty.
Digital Operator Display
HCA
Cause
Load is too heavy.
Accel/decel ramp is 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 a momentary
power loss or while attempting to perform a fault
reset.
Digital Operator Display
LT-1
Cause
The cooling fan has reached 90% of its expected
performance life.
Digital Operator Display
LT-2
Cause
The main circuit and control circuit capacitors have
reached 90% of their expected performance life.
Digital Operator Display
LT-3
Cause
The DC bus soft charge relay has reached 90% of
expected performance life.
Digital Operator Display
LT-4
Cause
IGBTs have reached 90% of their expected
performance life.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
• Check if the unused terminals have been set for H1-
• Change the terminal settings.
Safe Disable Signal Input
Both Safe Disable Input channels 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, check if the terminals H1-HC, and H2-HC are linked.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or your nearest
sales representative.
Safe Disable Circuit Fault Signal Input
One Safe Disable channel is open while the other one is closed.
Check signal status at the input terminals H1 and H2. If the Safe Disable function is not utilized, the terminals H1-HC, and H2-HC
must be linked.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or your nearest
sales representative.
High Current Alarm
Drive current exceeded overcurrent warning level (150% of the rated current).
Either reduce the load for applications with repetitive operation (repetitive stops and starts, etc.), or replace the drive.
Calculate the amount of torque required for the desired acceleration and/or deceleration ramp relative to the inertia moment of the
load.
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).
• 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 appear only briefly. There is no need to take action to prevent the alarm from occurring in such instances.
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-
Replace the cooling fan and reset the Maintenance Monitor by setting o4-03 to 0.
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-
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.
Note: An alarm output (H2- = 10) will only be triggered if H2-
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or your nearest
sales representative.
IGBT Maintenance Time (90%)
IGBTs have reached 90% of their expected performance life.
Note: An alarm output (H2- = 10) will only be triggered if H2-
Check the load, carrier frequency, and output speed.
NOTICE:
Optimize Performance Life. To maximize drive performance life, make sure the drive output current does not exceed 150% of the
drive rated current. Expected performance life estimates the number of drive starts at three million times if output current does not
exceed 150%. This assumes the carrier frequency is at its default setting (8 kHz for models CIMR-L 2A0018 to 2A0115, 4A0009 to
4A0091, and 5 kHz for models CIMR-L 2A0145, 2A0180, 4A0112, 4A0150) and a peak current of less than 150% of the drive
rated current.
6.4 Alarm Detection
= 20 to 2F (External Fault).
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
= 2F.
Possible Solutions
Minor Fault Name
= 2F.
Possible Solutions
Minor Fault Name
= 2F.
Possible Solutions
Minor Fault Name
= 2F.
Possible Solutions
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