Digital Operator Display
Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received for the CE detection time set to H5-09.
Cause
Possible Solution
Faulty communications wiring or an existing
short circuit
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
Communication data error occurred due to
noise
• Check the various options available to minimize the effects of noise.
• Counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or the
drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if
required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive
power supply input.
Digital Operator Display
Fault Name
CF
Control Fault
The torque limit was reached continuously for three seconds after the Stop command was input and
deceleration was not possible in OLV Control.
Cause
Possible Solution
Motor parameters are set improperly
Check the motor parameter settings and repeat Auto-Tuning.
Torque limit is too low
Set the torque limit to the most appropriate setting (L7-01 through L7-04).
Load inertia is too big
• Adjust the deceleration time (C1-02, C1-04, C1-06, C1-08).
• Set the frequency to the minimum value and interrupt the Run command when the drive finishes
decelerating.
Digital Operator Display
Fault Name
CoF
Current Offset Fault
Drive starts operation while the current-detection circuit failure, or the induced voltage remains in the
motor (coasting and after rapid deceleration).
Cause
Possible Solution
The drive performed a current offset
adjustment while the motor was rotating
• The set value exceeds the allowable setting range while the drive automatically adjusts the current
offset. This happens when attempting to restart a PM motor that is coasting to stop.
• Set b3-01 to 1 to enable Speed Search at Start.
• Perform Speed Search 1 or 2 (H1-
oo
= 61 or 62) via one of the external terminals.
Note:
Speed Searches 1 and 2 are the same when using OLV/PM.
Hardware problem
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
Digital Operator Display
Fault Name
to
,
,
,
to
,
to
,
to
,
to
CPF00 to CPF03,
CPF07, CPF08,
CPF11 to CPF14,
CPF16 to CPF24,
CPF26 to CPF35,
CPF40 to CPF45
Control Circuit Error
Cause
Possible Solution
Hardware is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or your nearest sales representative.
Connector on the operator is damaged.
Replace the operator.
Digital Operator Display
Fault Name
CPF06
Control Circuit Error
There is an error in the data saved to EEPROM.
Cause
Possible Solution
The power supply was switched off when
parameters were being saved to the drive.
Reinitialize the drive (A1-03 = 2220, 3330).
6.4 Fault Detection
368
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
Summary of Contents for U1000 iQpump Drive
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