8-6
Fault
display
Probable cause and remedyFault name and meaning
Emergency stop (STP)
An emergency stop alarm is
input to a multi-function input.
(A multi-function input 1, 2, 3,
or 4 set to 19 or 21 has
operated.)
• An emergency stop alarm is input to a multi-function input.
→ Remove the cause of the fault.
• The sequence is incorrect.
→ Check and change the external fault input sequence
including the input timing and NO or NC contact.
OFF Power supply error
• Insufficient power supply
voltage
• Control power supply fault
• Hardware fault
• No power supply is provided.
→ Check and correct the power supply wire and voltage.
• Terminal screws are loosened.
→ Check and tighten the terminal screws.
• The Inverter is damaged.
→ Replace the Inverter.
Maintenance Operations Chapter 8
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