Check manual page of hp_msa_psu
HP MSA 2040: Power Supply Health
This check reports the health states of the power supplies
of a HP MSA 2040 storage system. To make it work you have to configure
the hp_msa datasource program the via WATO.
If the state of a power supply is "OK" then the service state is OK.
Otherwise the service shows the health status and reason of the power supply
and changes to WARN or CRIT.
The name of the power supply.
One service per power supply is created.