YASKAWA P1000 Technical Manual page 209

HOA Keypad Display
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
Surrounding temperature is too high
Internal cooling fan has stopped
Airflow around the drive is restricted
HOA Keypad Display
oH2
Cause
An external device triggered an overheat warning
in the drive
HOA Keypad Display
oH3
Cause
Motor thermostat wiring is faulty (PTC input).
There is a fault on the machine side (e.g., the
machine is locked up)
Motor has overheated
HOA Keypad Display
oL3
Cause
Inappropriate parameter settings
There is a fault on the machine side (e.g., the
machine is locked up)
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
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.
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).
• Check the surrounding temperature.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool surrounding area.
• Remove anything near drive that may cause extra heat.
• Replace the cooling fan.
• After replacing the drive, set parameter o4-03 to 0 to reset the cooling fan operation time.
• Provide proper installation space around the drive as indicated in the manual.
• Allow for the proper space and ensure that there is sufficient circulation around the control panel.
• Check for dust or other foreign materials clogging the cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Drive Overheat Warning
Search for the device that tripped the overheat warning. Remove the cause of the problem.
Motor Overheat
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level
(H3-02 or H3-10 = E).
Repair the PTC input wiring.
• Check the status of the machine.
• Remove the cause of the fault.
• Check the load size, accel/decel times, and cycle times.
• Decrease the load.
• Increase accel and decel times (C1-01 and C1-02).
• Adjust the preset V/f pattern. Set E1-03 to 6.
• Check the motor-rated current.
• Enter motor-rated current on motor nameplate (E2-01).
• Ensure the motor cooling system is operating normally.
• Repair or replace the motor cooling system.
Overtorque 1
Drive output current was greater than L6-02 for longer than the time set to L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
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
6.5 Alarm Detection
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