Delta VFD-F Series Drive

Delta VFD-F Series Drive Fault Codes:

Fault Code and MeaningCause and Remedy
oc
Over Current
Cause:

The AC drive detects an abnormal increase in current.



Remedy:


  1. Check whether the motor’s 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.

  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.
ou
Over Voltage
Cause:

The AC drive detects that the DC bus voltage has exceeded its maximum allowable value.



Remedy:


  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 brake power is within the specified limits.
oH
Over Heat
Cause:

The AC drive temperature sensor detects excessive heat.



Remedy:


  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 heatsinks and check for possible dirty heat sink fins.

  4. Provide enough spacing for adequate ventilation.
Lu
Low Voltage
Cause:

The AC drive detects that the DC bus voltage has fallen below its minimum value.



Remedy:


  • Check whether the input voltage falls within the rated AC drive’s input voltage.
oL
Over Load
Cause:

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.



Remedy:


  1. Check whether the motor is overloaded.

  2. Reduce torque compensation setting as set in Pr.7-02.

  3. Increase the AC drive’s output capacity.
oL1
Internal electronic overload trip
Cause:

Internal electronic overload trip.



Remedy:


  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.7-00.
oL2
Motor Overload
Cause:

Motor overload. Check the parameter settings (Pr.6-03 to Pr.6-05).



Remedy:


  1. Reduce the motor load.

  2. Adjust the over-torque detection setting to an appropriate setting (Pr.06-03 to Pr.06-05).
HPF1
GFF hardware error
Cause:

GFF hardware error.



Remedy:


  • Return to the factory.
HPF2
CC (Current Clamp)
Cause:

CC (Current Clamp) error.



Remedy:


  • Return to the factory.
HPF3
OC hardware error
Cause:

OC hardware error.



Remedy:


  • Return to the factory.
HPF4
OV hardware error
Cause:

OV hardware error.



Remedy:


  • Return to the factory.
HPF5
OH hardware error
Cause:

OH hardware error.



Remedy:


  • Return to the factory.
cE–
Communication Error
Cause:

Communication Error.



Remedy:


  1. Check the connection between the AC drive and computer for loose wires.

  2. Check if the communication protocol is properly set.
ocA
Over-current during acceleration
Cause:

1. Short-circuit at motor output.

2. Torque boost too high.

3. Acceleration time too short.

4. AC drive output capacity is too small.



Remedy:


  1. Check for possible poor insulation at the output line.

  2. Decrease the torque boost setting in Pr.7-02.

  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
Cause:

1. Short-circuit at motor output.

2. Deceleration time too short.

3. AC drive output capacity is too small.



Remedy:


  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
Cause:

1. Short-circuit at motor output.

2. Sudden increase in motor loading.

3. AC drive output capacity is too small.



Remedy:


  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).
EF
Analog Signal Error
Cause:

Analog Signal Error.



Remedy:


  1. Check ACI wiring.

  2. Check whether the input current of ACI is lower than Pr.04-13/04-17 setting.
EF1
Emergency stop
Cause:

When the multi-function input terminals (MI1 to MI8) stop, AC drive stops any output.



Remedy:


  • Press RESET after fault has been cleared.
cF1
Internal memory error
Cause:

Internal memory IC cannot be programmed.



Remedy:


  1. Return to the factory.

  2. Check the EEPROM on the control board.
cF2
Internal memory error
Cause:

Internal memory IC cannot be read.



Remedy:


  1. Return to the factory.

  2. Reset drive to factory defaults.
cF3.3
U-phase error
Cause:

U-phase error.



Remedy:

  • Return to the factory.
cF3.4
V-phase error
Cause:

V-phase error.



Remedy:

  • Return to the factory.
cF3.5
W-phase error
Cause:

W-phase error.



Remedy:

  • Return to the factory.
cF3.6
OV or LV
Cause:

OV or LV (Over Voltage or Low Voltage) error.



Remedy:

  • Return to the factory.
cF3.7
Isum error
Cause:

Isum error.



Remedy:

  • Return to the factory.
cF3.8
OH error
Cause:

OH (Over Heat) error.



Remedy:

  • Return to the factory.
codE
Software protection failure
Cause:

Software protection failure.



Remedy:

  • Return to the factory.
cFA
Auto accel/decel failure
Cause:

Auto accel/decel failure.



Remedy:

  • Don’t use the function of auto acceleration /deceleration.
GFF
Ground fault
Cause:

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.



Remedy:


  1. Check whether the IGBT power module is damaged.

  2. Check for possible poor insulation at the output line.
bb
External Base Block
Cause:

External Base Block. AC drive output is turned off.



Remedy:


  1. When the external input terminal (B.B) is active, the AC drive output will be turned off.

  2. Disable this connection and the AC drive will begin to work again.
FbL
PID Feedback Signal Error
Cause:

PID Feedback Signal Error.



Remedy:


  1. Check parameter settings (Pr.10-00) and AVI/ACI1/ACI2 wiring.

  2. Check for possible fault between system reaction time and the feedback signal detection time (Pr.10-08/Pr.10-09).
FAnP
Fan Power Fault
Cause:

Fan Power Fault (150~300HP).



Remedy:

  • Return to the factory.
FF1
Fan 1 fault
Cause:

Fan 1 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF2
Fan 2 fault
Cause:

Fan 2 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF3
Fan 3 fault
Cause:

Fan 3 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF123
Fan 1, 2, 3 fault
Cause:

Fan 1, 2, 3 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF12
Fan 1, 2 fault
Cause:

Fan 1, 2 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF13
Fan 1, 3 fault
Cause:

Fan 1, 3 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
FF23
Fan 2, 3 fault
Cause:

Fan 2, 3 fault (150~300HP).



Remedy:

  • Remove any foreign objects on the heatsinks and check for possible dirty heat sink fins.
Fu
Gate Drive Low Voltage Protect
Cause:

Gate Drive Low Voltage Protect.



Remedy:

  • Return to the factory.