MX10004 chassis alarmed for "PEM <x> Feed <y> switch OFF but input connected" like below:

MX10004> show chassis alarms

6 alarms currently active

Alarm time Class Description

2025-07-01 01:44:15 UTC Minor PEM 2 Feed 2 switch OFF but input connected

2025-07-01 01:44:15 UTC Minor PEM 2 Feed 1 switch OFF but input connected

2025-07-01 01:44:15 UTC Minor PEM 1 Feed 2 switch OFF but input connected

2025-07-01 01:44:15 UTC Minor PEM 1 Feed 1 switch OFF but input connected

2025-07-01 01:44:15 UTC Minor PEM 0 Feed 2 switch OFF but input connected

2025-07-01 01:44:15 UTC Minor PEM 0 Feed 1 switch OFF but input connected

The MX10004 had DIP switch on the PEM that should be set correctly according to the MX10004 manual for the installed PEM model.

https://www.juniper.net/documentation/us/en/hardware/mx10004/topics/topic-map/mx10004-power-system.html

After correcting the DIP (dual inline package) switch setting, those alarms are cleared.