Troubleshooting and Maintenance
ADC Off Set: An error in the current sensing circuit (U/V/W
terminal, current sensor, etc.).
Gate Pwr Loss: An interruption in the supply of power to the
IGBT Gate of a product rated 30 kW or higher (when a fault
occurs in a 22 kW-rated product, the capacity settings should
be checked).
Displayed when an error is detected in the temperature
sensor of the Insulated Gate Bipolar Transistor (IGBT).
Displayed when an error is detected in the cooling fan. Set
PRT-79 to “0” to activate fan trip (for models with a capacity
below 22 kW).
Displayed when the IP54 product detects an internal
circulation at the cooling fan.
Only
applied
to IP54
product
Displayed when the resistance value exceeds the prescribed
value after the external temperature sensor is connected to
the terminal block. Operates when PRT-34 is set to any value
other than “0”.
Displayed when communication fails during parameter
writing. Occurs when using an LCD keypad due to a control
cable fault or a bad connection.
Displayed when the motor speed exceeds the overspeed
detection level. Set the detection level at PRT-70.
Displayed when the speed that received feedback from the
encoder exceeds the set variation value. Operates when PRT-
73 is set to “1”.
Displayed when PRT-77 Enc Wire Check is set to “1” and an
abnormality is detected for the set period of time.
Displayed when pre-PID is operating with functions set at
APP-34–36. A fault trip occurs when a controlled variable (PID
feedback) is measured below the set value and the low
feedback continues, as it is treated as a load fault.
When Control Mode (DRV-09) is V/F or Sensorless1 or
Sensorless2: The trip occurs when OUT-31–32 is set to BR
control and the output current is lower than ADV-41 value (%
for BAS-13) for about 10 seconds.
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