On PTX5000 device we may encounter the following alarm messages on their system:

ptx5000> show chassis alarms

1 alarms currently active

Alarm time Class Description

2024-03-31 00:11:06 GMT Minor No Redundant Power for Fan 0-2

In PTX5000, one PSM0 in either PDU0/1 can provide power to all fan trays but with one PSM0 working in system, the the configuration becomes non-redundant and an minor alarm  will be raised like "No Redundant Power for Fan 0-2"

Example:-

The PSM0 in PDU 1 is not showing anything and seem to be faulty. 

ptx5000> show chassis environment | match PDU

Temp PDU 0 OK

PDU 0 PSM 0 OK 31 degrees C / 87 degrees F

PDU 0 PSM 1 OK 29 degrees C / 84 degrees F

PDU 0 PSM 2 OK 29 degrees C / 84 degrees F

PDU 0 PSM 3 OK 28 degrees C / 82 degrees F

PDU 1 OK

PDU 1 PSM 0 

PDU 1 PSM 1 OK 29 degrees C / 84 degrees F

PDU 1 PSM 2 OK 30 degrees C / 86 degrees F

PDU 1 PSM 3 OK 29 degrees C / 84 degrees F

You can refer the link for power planning in PTX5000 https://www.juniper.net/documentation/us/en/hardware/ptx5000/topics/topic-map/ptx5000-power-planning.html

The output "show chassis environment" is not showing anything for PSM0 in PSDU1. Verify the LED status on PSM0 in PDU1 to get the status.

Try to reseat the PSM, If the issue persists even after reseating the PSU, try swapping/changing the PSM to determine if the problem lies with the PSM or the slot.