Yaskawa J7 Drive - Manual (Page 78)

6-5
Fault Display
Digital RUN (Green)
Drive
Explanation
Causes and
Operator ALARM (Red)
Status Corrective Actions
UV2 (Control power Cycle power.
supply fault) If the fault remains.
Voltage fault of control replace the drive.
power supply is detected.
OH (Cooling fin overheat) • Excessive load
Temperature rise • Improper V/f pattern
because of drive setting
overload operation or • Insufficient accel time
intake air temperature if the fault occurs
rise. during acceleration
• Intake air temperature
exceeding 122°F (50°C)
Check the following:
• Load size
• V/f pattern setting
(parameters n09 to n15)
• Intake air temperature.
OL1 (Motor overload) • Check the load size or
Protective Motor overload V/f pattern setting
Operation. protection operates by (parameters n09 to n15)
Output is built-in electronic thermal • Set the motor rated
shut OFF overload relay. current shown on the
and motor nameplate in parameter
coasts to n32.
a stop.
OL2 (Drive overload) • Check the load size or
Drive overload V/f pattern setting
protection operates by (parameters n09 to n15)
built-in electronic thermal • Check the drive
overload relay. capacity.
OL3 (Overtorque detection) Check the driven
Drive output current machine and correct the
exceeded the preset value in cause of the fault, or
parameter n60. increase the value of
parameter n60 up to the
When overtorque is highest value allowed for
detected, drive performs the machine.
operation according to the
preset setting of parameter
n59.
Table 6-2. Fault Displays and Corrective Actions - Continued