YASKAWA T1000A, Техническое руководство, Страница: 292 / 517

6.5 Alarm Detection
292 YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
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.
Digital Operator Display Minor Fault Name
oH
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).
Cause Possible Solutions
Surrounding temperature is too high
• 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.
Internal cooling fan has stopped.
• Replace the cooling fan. Refer to Cooling Fan Component Names on page 320 .
• After replacing the drive, reset the cooling fan maintenance parameter to (o4-03 = “0”).
Airflow around the drive is restricted.
• Provide proper installation space around the drive as indicated in the manual. Refer to Installation Orientation and Spacing on
page 36 .
• 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.
Digital Operator Display Minor Fault Name
oH2
Drive Overheat Warning
“Drive Overheat Warning” was input to a multi-function input terminal, S1 through S8 (H1-
††
= B)
Cause Possible Solutions
An external device triggered an overheat warning in
the drive. • Search for the device that tripped the overheat warning.
• Solving the problem will clear the warning.
Digital Operator Display Minor Fault Name
oH3
Motor Overheat
The motor overheat signal entered to a multi-function analog input terminal exceeded the alarm level (H3-02, H3-06 or H3-10 = E).
Cause Possible Solutions
Motor thermostat wiring is fault (PTC input). Repair the PTC input wiring.
There is a fault on the machine side (e.g., the
machine is locked up). • Check the status of the machine.
• Remove the cause of the fault.
Motor has overheated.
• 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.
Digital Operator Display Minor Fault Name
oL3
Overtorque 1
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.
Cause Possible Solutions
Inappropriate parameter settings. Check parameters L6-02 and L6-03.
There is a fault on the machine side (e.g., the
machine is locked up). • Check the status of the machine.
• Remove the cause of the fault.
Digital Operator Display Minor Fault Name
oL4
Overtorque 2
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.
Cause Possible Solutions
Parameter settings are not appropriate. Check parameters L6-05 and L6-06.
There is a fault on the machine side (e.g., the
machine is locked up). • Check the status of the machine being used.
• Remove the cause of the fault.