oC | The AC drive detects an abnormal increase in current. |
1. Check whether the motors horsepower corresponds to the AC drive output power. 2. Check the wiring connections between the AC drive and motor for possible short circuits. 3. Increase the Acceleration time (Pr.10, Pr.12). 4. Check for possible excessive loading conditions at the motor. 5. If there are any abnormal conditions when operating the AC drive after short-circuit being removed, it should be sent back to manufacturer. |
oV | The AC drive detects that the DC bus voltage has exceeded its maximum allowable value. |
1. Check whether the input voltage falls within the rated AC drive input voltage. 2. Check for possible voltage transients. 3. Bus over-voltage may also be caused by motor regeneration. Either increase the decel time or add an optional brake resistor. 4. Check whether the required braking power is within the specified limits. |
oH | The AC drive temperature sensor detects excessive heat. |
1. Ensure that the ambient temperature falls within the specified temperature range. 2. Make sure that the ventilation holes are not obstructed. 3. Remove any foreign objects on the heat sinks and check for possible dirty heat sink fins. 4. Provide enough spacing for adequate ventilation. |
Lv | The AC drive detects that the DC bus voltage has fallen below its minimum value. | Check whether the input voltage falls within the rated AC drive’s input voltage. |
oL | The AC drive detects excessive drive output current. Note: The AC drive can withstand up to 150% of the rated current for a maximum of 60 seconds. |
1. Check whether the motor is overloaded. 2. Reduce torque compensation setting as set in Pr.54. 3. Increase the AC drive’s output capacity. |
oL1 | Internal electronic overload trip | 1. Check for possible motor overload. 2. Check electronic thermal overload setting. 3. Increase motor capacity. 4. Reduce the current level so that the drive output current does not exceed the value set by the Motor Rated Current Pr.52. |
oL2 | Motor overload. Check the parameter settings (Pr.60 to Pr.62) |
1. Reduce the motor load. 2. Adjust the over-torque detection setting to an appropriate setting. |
ocR | Over-current during acceleration: 1. Short-circuit at motor output. 2. Torque boost too high. 3. Acceleration time too short. 4. AC drive output capacity is too small. |
1. Check for possible poor insulation at the output line. 2. Decrease the torque boost setting in Pr.54. 3. Increase the acceleration time. 4. Replace with the AC drive with one that has a higher output capacity (next HP size). |
ocd | Over-current during deceleration: 1. Short-circuit at motor output. 2. Deceleration time too short. 3. AC drive output capacity is too small. |
1. Check for possible poor insulation at the output line. 2. Increase the deceleration time. 3. Replace with the AC drive with one that has a higher output capacity (next HP size). |
ocn | Over-current during steady state operation: 1. Short-circuit at motor output. 2. Sudden increase in motor loading. 3. AC drive output capacity is too small. |
1. Check for possible poor insulation at the output line. 2. Check for possible motor stall. 3. Replace with the AC drive with one that has a higher output capacity (next HP size). |
cFI | Internal memory IC can not be programmed. |
1. Switch off power supply. 2. Check whether the input voltage falls within the rated AC drive input voltage. 3. Switch the AC drive back on. |
cF2 | Internal memory IC can not be read. |
1. Check the connections between the main control board and the power board. 2. Reset drive to factory defaults |
EF | The external terminal EF-GND goes from OFF to ON. | When external terminal EF-GND is closed, the output will be turned off (under N.O. E.F.). |
cFA | Auto accel/decel failure | Don’t use the function of auto acceleration/ deceleration. |
GFF | Ground fault : The AC drive output is abnormal. When the output terminal is grounded (short circuit current is 50% more than the AC drive rated current), the AC drive power module may be damaged. The short circuit protection is provided for AC drive protection, not user protection. |
Ground fault : 1. Check whether the IGBT power module is damaged. 2. Check for possible poor insulation at the output line. |
cFI | Communication Error Please refer to Pr.92. |
1. Check the connection between the AC drive and computer for loose wires. 2. Check if the communication protocol is properly set. |
bb | External Base Block. AC drive output is turned off |
1. When the external input terminal (baseblock) is active, the AC drive output will be turned off. 2. Disable this connection and the AC drive will begin to work again. |
HPF | OC hardware error | Return to the factory. |
HPF. | CC (current clamp) | |
HP.F | OV hardware error | |
HP.F. | GFF hardware error | |
cF3 | OV or LV | |
cF3. | Current sensor error | |
cF.3 | U-phase error | Return to the factory. |
c.F3 | W-phase error | |
PHL | Phase Loss | Check input phase wiring for loose contacts. |
code | Software protection failure | Return to the factory. |
FbE | PID feedback signal error | 1. Check parameter settings (Pr.116) and AVI/ACI wiring. 2. Check for possible fault between system response time and the PID feedback signal detection time (Pr.123) |