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6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
1
2
3
4
5
6
7
8
9
10
Others
The operation status of the converter unit is displayed. It is not a fault.
NOTE
• If faults other than the above appear, contact your sales representative.
Operation panel
indication
E.PBT
E.13
Name
Internal circuit fault
Description
The inverter output is shut off when an internal circuit fault occurs in the converter unit.
Corrective action
Contact your sales representative.
Operation panel
indication
E.1
Name
Option fault
Description
The inverter output is shut off if a plug-in option is disconnected while the converter unit power is ON.
Check point
• Check if a plug-in option is connected.
• Check for excessive noise around the converter unit.
Corrective action
• Disconnect the plug-in option. (Plug-in options cannot be used.)
• Take measures against noises if there are devices producing excessive electrical noises around the converter
unit.
If the problem still persists after taking the above measure, contact your sales representative.
Operation panel
indication
E.0
Name
No fault history
Description
Appears when no fault records are stored. (Appears when the fault history is cleared after the protective function
has been activated.)
Operation panel
indication
EV
Name
24 V external power supply operation
Description
Blinks when the main circuit power supply is off and the 24 V external power supply is being input.
Check point
Power is supplied from a 24 V external power supply.
Corrective action
• Turning ON the power supply (main circuit) of the converter unit clears the indication.
• If the indication is still displayed after turning ON of the power supply (main circuit) of the converter unit, the
power supply voltage may be low.
