AL.503 STO self-diagnosis error – Delta servo troubleshooting

<= See All alarms of Delta servo

Name	Description	ALM	WRN	SRV ON	Clear Way
AL.503 STO Diagnosis	STO self-daignosis error	⊗		NO	Cycle power on

Causes	Checking Method	Actions
An error occurs during STO self-diagnosis, which may be caused by an abnormality in the STO circuit.	N/A	Contact the distributor.

(The above information is referenced from Delta Electronics IMSBU)

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Other reasons	Checking Method	Actions

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