YASKAWA GA700 Series Technical Manual page 355

Code Name
LT-4 IGBT Maintenance Time (50%)
Note:
When the estimated performance life is expired, the terminal assigned to H2-01 to H2-03 = 2F [MFDO Function Select = Maintenance Notification] will be ON.
Code Name
oH Heatsink Overheat
Note:
• The drive detects this error if the heatsink temperature of the drive is more than L8-02.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• Set the stopping method for this fault in L8-03 [Overheat Pre-Alarm Selection].
Code Name
oH2 External Overheat (H1-XX=B)
Note:
If the drive detects this error, the terminal set to H2-01 to H2-02 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name
oH3 Motor Overheat (PTC Input)
Note:
• When H3-02, H3-10, or H3-06 = E [MFAI Function Selection = Motor Temperature (PTC Input)], the drive detects this fault if the motor overheat signal entered to an
analog input terminal A1, A2, or A3 is more than the alarm detection level.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in L1-03 [Motor Thermistor oH Alarm Select].
Code Name
oL3 Overtorque 1
Note:
• The drive detects this fault if the drive output current is more than the level set in L6-02 for longer than L6-03.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• Set the conditions that trigger the minor fault using L6-01 [Torque Detection Selection 1].
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Causes
The IGBT is at 50% of its expected performance
life.
Causes
The ambient temperature is high and the heatsink
temperature is more than the L8-02 [Overheat
Alarm Level].
There is not sufficient airflow around the drive.
The internal cooling fan or fans have stopped.
Causes
An external device sent an oH2.
Causes
The thermistor wiring that detects motor
temperature is defective.
A fault occurred on the machine.
Example: The machine is locked.
The motor has overheated.
Causes
A fault occurred on the machine.
Example: The machine is locked.
The parameters are incorrect for the load.
7.5 Minor Faults/Alarms
Possible Solutions
Check the load, carrier frequency, and output frequency.
Possible Solutions
• Measure the ambient temperature.
• Increase the airflow around the drive.
• Install a cooling device (cooling fan or air conditioner) to
lower the ambient temperature.
• Remove objects near the drive that are producing too much
heat.
• Give the drive the correct installation space as shown in the
manual.
• Make sure that there is sufficient circulation around the control
panel.
• Examine the drive for dust or other unwanted materials that
could clog the cooling fan.
• Remove unwanted materials that prevent air circulation.
1. Use the procedures in this manual to replace the cooling fan.
2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset
the cooling fan operation time.
Possible Solutions
1. Find the external device that output the overheat alarm.
2. Remove the cause of the problem.
3. Clear the Overheat Alarm (oH2) [H1-xx = B] that was set to
MFDI terminals S1 to S6.
Possible Solutions
Correct wiring errors.
Examine the machine and remove the cause of the fault
• Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).
• Decrease the load.
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Times].
• Set E2-01 [Motor Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
• Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.
• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,
adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid
Point A Voltage] and E1-10 [Minimum Output Voltage].
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
Possible Solutions
Examine the machine and remove the cause of the fault.
Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque
Detection Time 1] settings.
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