YASKAWA J1000 Technical Manual page 135

6.4 Fault Detection
The power supply was switched off within 5
seconds after changing the frequency
reference when o2-05 is set to 1.
LED Operator Display
CPF08
Cause
Control circuit is damaged.
LED Operator Display
or CPF20 or CPF21
Cause
Hardware is damaged.
LED Operator Display
CPF22
Cause
Control circuit is damaged.
LED Operator Display
CPF23
Cause
Hardware is damaged.
LED Operator Display
CPF24
Cause
Hardware is damaged.
LED Operator Display
Cause
An external fault was received from the PLC
with other than H5-04 = 3 "alarm only" (the
drive continued to run after external fault).
Problem with the PLC program.
LED Operator Display
Cause
134
Set up the external operation to allow at least 5 seconds pass before the power supply is shut off and after
changing the frequency reference while o2-05 is set to 1.
EEPROM Communication Fault
EEPROM communications are not functioning properly.
Cycle power to the drive. If the problem persists, replace the drive.
One of the following faults occurred: RAM fault, FLASH memory error, watchdog circuit exception,
clock error
• RAM fault.
• FLASH memory error (ROM error).
• Watchdog circuit exception (self-diagnostic error).
• Clock error.
Replace the drive.
A/D Conversion Fault
A/D conversion error.
• Cycle power to the drive.
• If the problem continues, replace the drive.
PWM Feedback Fault
PWM feedback error.
Replace the drive.
Drive Capacity Signal Fault
Entered a capacity that does not exist. (Checked when the drive is powered up.)
Replace the drive.
MEMOBUS/Modbus Communication External Fault
EF0
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
External Fault (input terminal S1)
EF1
External fault at multi-function input terminal S1.
External Fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
External Fault (input terminal S3)
EF3
External fault at multi-function input terminal S3.
External Fault (input terminal S4)
EF4
External fault at multi-function input terminal S4.
External Fault (input terminal S5)
EF5
External fault at multi-function input terminal S5.
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Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Refer to Diagnosing and Resetting Faults on page
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
146.