YASKAWA Z1000 User Manual page 223

HOA Keypad Display
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
The DC bus soft charge relay has reached 90% of
expected performance life
HOA Keypad Display
LT-4
Cause
IGBTs have reached 50% of their expected
performance life
HOA Keypad Display
oH
Cause
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
• Calculate the torque required during acceleration and for the moment of inertia.
• 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.
Note:
An alarm output (H2-oo = 10) will only be triggered if both (H2-oo = 2F and H2-
oo = 10) are set.
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.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
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-oo = 10) will only be triggered if H2-oo = 2F.
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 (50%)
IGBTs have reached 50% of their expected performance life.
Note: An alarm output (H2-oo = 10) will only be triggered if H2-oo = 2F.
Check the load, carrier frequency, and output frequency.
Heatsink Overheat
The temperature of the heatsink exceeded the overheat pre-alarm level set to L8-02 (90-100 °C).
Default value for L8-02 is determined by drive capacity (o2-04).
Minor Fault Name
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
Minor Fault Name
Possible Solutions
5.5 Alarm Detection
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