You can try to reset a 900 series power supply by following the steps below:
1) Remove any load from the supply. This is any relay boards and anything wired into the DC outputs.
2) Disconnect the AC from the supply.
3) Remove the 12/24VDC jumper and wait a moment.
4) Reconnect the 12/24VDC jumper.
5) Reconnect the AC
This should bring the DC back up. If not, the supply will need to be replaced.
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