YASKAWA GA800 Technical Reference page 396

7.5 Minor Faults/Alarms
Code Name
LT-1 Cooling Fan Maintenance Time
Note:
When the estimated performance life is expired, the terminal set to H2-01 to H2-03 = 2F [MFDO Function Selection = Maintenance Notification] will activate.
Code Name
LT-2 Capacitor Maintenance Time
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
LT-3 SoftChargeBypassRelay MainteTime
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
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)
396
Causes
The cooling fan is at 90% of its expected performance
life.
Causes
The capacitors for the main circuit and control circuit
are at 90% of expected performance life.
Causes
The soft charge bypass relay is at 90% of its expected
performance life.
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.
Possible Solutions
1. Replace the cooling fan.
2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset the
cooling fan operation time.
Possible Solutions
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
Possible Solutions
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
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
YASKAWA SIEPC71061737D GA800 Drive Technical Reference