Server type: R730
Farmware version of iDRAC8: 2.70.70.70
OS:Ubuntu

I am trying to get the following OID data with SNMP in Zabbix,
but the value is "unknown (2)". Why is that?
Where is it going to see in the iDRAC web interface?

voltageProbeStatus
1.3.6.1.4.1.674.10892.5.4.600.20.1.5.1.7
(The display in Zabbix is "VoltageCPU1 Presence: Status".)

By the way, other servers can be obtained with "OK (3)" .
(iDRAC8 version is 2.60.60.60. OS is CentOS.)