YASKAWA V1000 Series Installation & Start-Up Manual page 188

5.4 Fault Detection
LED Operator Display
Cause
Motor parameters are not set
properly.
Torque limit is too low.
Load inertia is too big.
LED Operator Display
Cause
While the drive automatically
adjusted the current offset, the
calcluated value exceeded the
allowable setting range. This
problem may occur when attempting
to restart a coasting PM motor.
The drive attempted to write
parameter values when the drive
input power was shut off
(uscommunicaing tions option card).
Cause
Control circuit is damaged.
Control circuit terminals have
shorted out (+V, AC).
Control terminal input current has
exceeded allowable levels.
LED Operator Display
Cause
Drive hardware is damaged.
188
Control Fault
CF
A torque limit was reached continuously for three seconds or longer during a
ramp to stop while in Open Loop Vector Control.
Check the motor parameter settings and repeat Auto-Tuning.
Set the torque limit to the most appropriate setting (L7-01 through L7-04).
• Adjust the deceleration time (C1-02, -04, -06, -08).
• Set the frequency to the minimum value and interrupt the run command when
the drive finishes decelerating.
Current Offset Fault
CoF
There is a problem with the current detection circuit or the drive attempted to
start a coasting PM motor.
Enable Speed Search at start (b3-01 = 1).
Use the multi-function terminals to execute External Speed Search 1 and 2
(H1-
Search 1 and 2 perform the same operation.
Reinitialize the drive (A1-03).
A/D Conversion Error
CPF02
An A/D conversion error occurred.
Cycle power to the drive.
If the problem continues, replace the drive.
• Check for wiring errors along the control circuit terminals.
• Correct the wiring.
Check the resistance of the speed potentiometer and related wiring.
• Check the input current.
• Reduce the current input to control circuit terminal (+V) to 20 mA.
PWM Data Error
CPF03
There is a problem with the PWM data.
Replace the drive.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
Fault Name
Possible Solution
Fault Name
Possible Solution
. = 61 or 62). NOTE: When using a PM motor, both External Speed
Possible Solution
Fault Name
Possible Solution