The following items may cause the PS900 series power supply to have no DC output voltage.
1. If the DC voltage selection jumper is missing, the power supply will not provide any DC output.
2. If the power supply is over loaded, the DC output will drop voltage. Remove the load from the power supply and allow twenty seconds for the power supply to reset then measure the DC output.
3. If the DC voltage was selected from 24VDC to 12VDC or vice versa after the AC voltage was applied to the power supply this could cause the power supply not to provide any DC output. Always select your DC voltage selection before applying AC into the power supply. Remove AC for twenty seconds, power supply will reset.
4. If the FA jumper is missing or fire alarm board is not connected to NC fire alarm contact only on PS902, power supply will not provide any DC output.
See attached instructions PS902 setup & testing PS904 setup & testing PS914 setup & testing PS906 setup & testing
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