Yaskawa CIMR-LU Drives - Manual (Page 130)

130 YASKAWA ELECTRIC TOEP C710616 38F YASKAWA AC Drive L1000A Quick Start Guide
5 Troubleshooting
5 Troubleshooting
◆ Fault Detection
■ Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop while triggering the fault output terminal MA-MB-
MC. Remove the cause of the fault and manually clear the fault before attempting to run the drive again.
Table 35 Detailed Fault Displays, Causes, and Possible Solutions
Digital Operator Display Fault Name
boL
Braking Transistor Overload
The braking transistor has reached its overload level.
bUS
Option Communication Error
• The connection was lost after establishing initial communication.
• Only detected when the Up/Down command speed reference is assigned to an option card.
CE
MEMOBUS/Modbus Communication Error
Communication data was not received for the amount of time set in parameter, H5-09
Communication Fault Detection Time.
CF
Control Fault
The torque limit was reached continuously for three seconds or longer while ramping to stop in OLV
Control.
CoF
Current Offset Fault
The current sensor is damaged or there was residual induction current in the motor (e.g., during
sudden deceleration or when coasting) when the drive attempted to start the motor.
or
<1>
CPF00 or CPF01 Control Circuit Error
CPF02
A/D Conversion Error
An A/D conversion error or control circuit error occurred.
CPF03
Control Board Connection Error
Connection error between the control board and the drive
CPF06
EEPROM Memory Data Error
An error in the data saved to EEPROM
CPF07
Terminal Board Connection Error
CPF08
to ,
to
<1>
CPF11 to CPF14,
CPF16 to CPF21
Control Circuit Error
CPF22 Hybrid IC Failure
CPF23
Control Board Connection Error
Connection error between the control board and the drive
CPF24
Drive Unit Signal Fault
The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered
up).
CPF25 Terminal Board not Connected
to CPF26 to CPF34
Control Circuit Error
CPU error
CPF35
A/D Conversion Error
An A/D conversion error or control circuit error occurred.
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