Owner's manual

6-1 Troubleshooting
6
Appendix
6-5
- Digital Fiber Sensor FS-N10 Series User's Manual -
*"ErE" display may remain if the FS-N10 Series is damaged.
For errors other than those listed above, contact your nearest KEYENCE office.
Error Displays and Corrective Actions
Error
display
Cause Solution
ErC
Overcurrent in the control output.
• Check the load and return the current within the
rated range.
• Check that the output wire is not contacting any
other wire or frame.
ErE
Failed to write/load the internal data.
•Turn the power OFF and ON. If the data is not
recovered, initialize the settings.*
"Initialization of Settings (Reset to Initial
Values)" (page 3-21)
End apC
Attenuation of LED light emission
exceeds the APC correction limit.
Because the unit is in a state where the APC
function cannot be used further, replace the
sensor if high-level detection is needed.
Loc
Key lock function is valid, or if the
power mode was changed in the
MEGA mode fixed state.
• Disable the key lock.
If the key lock cannot be disabled, it may be
locked with a password, or locked by the NU
Series communication unit.
"Disabling the Key Operation" (page 3-23)
• Check that the sensor amplifier is locked in
MEGA mode.
"Locking in MEGA Mode" (page 3-22)
The DTM
indicator
flashes.
Correction error in DATUM1 or
DATUM 2 mode.
• Check that the received light intensity has not
dropped.
•Adjust the DATUM warning output level.
•Ensure that the received light intensity value is
50 or more.