Yaskawa J1000 Compact V/f Control Drive - Manual (Page 135)

Digital Operator Display Fault Name
oFA01
Option Unit Fault
Replace the option unit.
Cause Possible Solution
The option unit is not connected
properly to the drive.
Turn the power off and reconnect the option unit.
Digital Operator Display Fault Name
oH1
Overheat 1 (Heatsink Overheat)
The temperature of the heatsink has exceeded the overheat pre-alarm level.
Cause Possible Solution
Surrounding temperature is too
high.
• Check the temperature surrounding the drive.
• Improve the air circulation within the enclosure panel.
• Install a fan or air conditioner to cool the surrounding area.
• Remove anything near the drive that might be producing excessive heat.
Load is too heavy.
• Measure the output current.
• Lower the carrier frequency (C6-02).
• Reduce the load.
Current flowing to control circuit
terminal +V exceeded the tolerance
level.
• Check the current level of the terminal.
• Set the current to the control circuit terminal to be 20 mA or less.
Digital Operator Display Fault Name
oL1
Motor Overload
The electrothermal sensor tripped overload protection.
Note: The integrated value of the internal register for oL1 must decrease before
oL1 can be reset.
Cause Possible Solution
Load is too heavy. Reduce the load.
Cycle times are too short during
acceleration and deceleration.
Increase the acceleration and deceleration times (C1-01 through C1-04).
• Drive overloaded at low
speeds.
• Overload may occur at low
speeds when using a general-
purpose motor, even if
operating within the rated
current limitation.
• Reduce the load.
• Increase the speed.
• If the drive is supposed to operate at low speeds, either increase the motor
capacity or use a motor specifically designed to operate with the drive.
Although a special type of motor is
being used, the motor protection
selection is set for a general-
purpose motor (L1-01 = 1).
Set L1-01 to 2.
5.4 Fault Detection
YASKAWA ELECTRIC TOEP C710606 26D YASKAWA AC Drive – J1000 Quick Start Guide 135
5
Troubleshooting