E50

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Error Code	Cause Analysis	Troubleshooting / Solution
OFS -3	Upgraded the incorrect firmware	Upgrade the correct firmware directly.
DFU	DFU mode may be accidently entered	Unplug the power supply and reboot.
d-3	Unit may be defective	Check the power supply and try with other DC5V power supplies, disconnect all the inputs and outputs of E50 and reboot. If that still not works, unit is considered defective.
Cycle displaying DIR and Err	Unit may be defective	Check the power supply and try with other DC5V power supplies, disconnect all the inputs and outputs of E50 and reboot. If that still not works, unit is considered defective.
Cycle displaying IN and Err	Abnormal input power	Check the power supply and try with other DC5V power supplies.
Cycle displaying INH and Err	Too high input voltage	Check the power supply and try with other DC5V power supplies.
Cycle displaying INL and Err	Too low input voltage	Check the power supply and try with other DC5V power supplies.
Cycle displaying PN and Err / Cycle displaying PNL and Err / Cycle displaying PNH and Err	1. If rebooting the unit restores it to normal, then try upgrading the firmware. 2. If rebooting the unit not restores it to normal, then unit may be defective.	1. Upgrade the newest firmware. 2. Check the power supply and try with other DC5V power supplies, disconnect all the inputs and outputs of E50 and reboot. If that still not works, unit is considered defective.