YASKAWA A1000 Series Technical Manual page 322

6.5 Alarm Detection
Digital Operator Display
Cause
The main circuit and control circuit capacitors have
reached 90% of their expected performance life.
Digital Operator Display
Cause
The DC bus soft charge relay has reached 90% of
their expected performance life.
Digital Operator Display
Cause
IGBTs have reached 50% of their expected
performance life.
Digital Operator Display
Cause
Surrounding temperature is too high
Internal cooling fan has stopped.
Airflow around the drive is restricted.
Digital Operator Display
Cause
An external device triggered an overheat warning in
the drive.
Digital Operator Display
Cause
Motor thermostat wiring is fault (PTC input).
There is a fault on the machine side (e.g., the
machine is locked up).
Motor has overheated.
Digital Operator Display
Cause
Inappropriate parameter settings.
There is a fault on the machine side (e.g., the
machine is locked up).
Digital Operator Display
Cause
Parameter settings are not appropriate.
There is a fault on the machine side (e.g., the
machine is locked up).
322
Capacitor Maintenance Time
LT-2
The main circuit and control circuit capacitors are nearing the end of their expected performance life.
Note: An alarm output (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
LT-3
The DC bus soft charge relay is nearing the end of its expected performance life.
Note: An alarm output (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 (50%)
LT-4
IGBTs have reached 50% of their expected performance life.
Note: An alarm output (H2-
Check the load, carrier frequency, and output frequency.
Heatsink Overheat
oH
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, reset the cooling fan maintenance parameter to (o4-03 = "0").
• Provide proper installation space around the drive as indicated in the manual.
page 40.
• Allow for the specified space and ensure that there is sufficient circulation around the control panel.
• Check for dust or foreign materials clogging cooling fan.
• Clear debris caught in the fan that restricts air circulation.
Drive Overheat Warning
oH2
"Drive Overheat Warning" was input to a multi-function input terminal, S1 through S8 (H1-
• Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.
Motor Overheat
oH3
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02, H3-06 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 to C1-08).
• Adjust the preset V/f pattern (E1-04 through E1-10). This will mainly involve reducing E1-08 and E1-10.
Note: Do not lower E1-08 and E1-10 excessively, because this reduces load tolerance at low speeds.
• 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
oL3
Drive output current (or torque in OLV, CLV, AOLV/PM, CLV/PM) was greater than L6-02 for longer than the time set in L6-03.
Check parameters L6-02 and L6-03.
• Check the status of the machine.
• Remove the cause of the fault.
Overtorque 2
oL4
Drive output current (or torque in OLV, CLV, AOLV/PM, CLV/PM) was greater than L6-05 for longer than the time set in L6-06.
Check parameters L6-05 and L6-06.
• Check the status of the machine being used.
• Remove the cause of the fault.
Minor Fault Name
= 10) will only be triggered if H2-
Possible Solutions
Minor Fault Name
= 10) will only be triggered if H2-
Possible Solutions
Minor Fault Name
= 10) will only be triggered if H2-
Possible Solutions
Minor Fault Name
Possible Solutions
Refer to Cooling Fan Component Names on page
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
= 2F.
= 2F.
= 2F.
352.
Refer to Installation Orientation and Spacing on
= B)