13 Troubleshooting
YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation 99
Code Name Causes Possible Solutions
oFA30 to
oFA43
Communication Option
Card Connection Error
(CN5)
A fault occurred in the option
card.
1. De-energize the drive.
2. Make sure that the option card is
correctly connected to the connector.
3. If the problem continues, replace the
option card.
oH Heatsink Overheat
The ambient temperature is high
and the heatsink temperature of
the drive is more than the value set
in L8-02 [Overheat Alarm Level].
• Measure the ambient temperature.
• Increase the airflow in the control panel.
• 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.
The load is too heavy. • Measure the output current.
• Decrease the load.
• Decrease the value set in C6-02 [Carrier
Frequency Selection].
The internal cooling fan of the
drive stopped.
1. Use the procedures in this manual to
replace the cooling fan.
2. Set o4-03 = 0 [Fan Operation Time
Setting = 0 h].
oH1 Heatsink Overheat
The ambient temperature is high
and the heatsink temperature of
the drive is more than the oH1
detection level.
• Measure the ambient temperature.
• Increase the airflow in the control panel.
• 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.
The load is too heavy. • Measure the output current.
• Decrease the load.
• Decrease the value set in C6-02 [Carrier
Frequency Selection].
oH3
Motor Overheat (PTC
Input)
The thermistor wiring that detects
motor temperature is defective.
Correct wiring errors.
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause
of the fault
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