# series5x Diagnostics & Error Codes ## Self Diagnosis The SENSORswitch includes the following diagnosis features: - **Self Test**: - Function of LEDs is periodically checked. - **Monitoring** of Supply Voltage and MCU Temperature - **Output Overload Detection** Detected errors are indicated via IO-Link Events and/or in the **Error Code** IO-Link Parameter, as well as by blinking patterns of the LED. Device with display additionally show the error code as text "E....". ## Error Codes

Blink Code	IO-Link Error Code	Description
1	0x0001	Internal error
4	0x0008	Supply voltage out-of-range
8	0x0080	Memory error
12	0x0800	LED error
13	0x1000	Overload error on digital output
15	0x4000	Temperature overrun