AP8659NA3 - snmp - unable to read Environment Name

[PeK]

Dear all,

I have PDU AP8659NA3 and I am trying to read by snmp-v1/v2 OID 

rPDU2SensorTempHumidityStatusName "1.3.6.1.4.1.318.1.1.26.10.2.2.1.3.1"

but I can't find the value, it seems to be hidden or missing??

I have also PDU AP8981 and reading OID 1.3.6.1.4.1.318.1.1.26.10.2.2.1.3.1 is without problem..

Also reading from APC UPS noproblem..

I need this function to correctly diagnose alarms from datacenter, any suggestions?
When I perform snmpwalk on "1.3.6.1.4.1.318.1.1.26.10.2.2.1.3.1" I get nothing.

Any help would be much appreciated.

Model Number: AP8659NA3
Hardware Revision: 03

Firmware
Rack PDU: Version 2.5.2.5
APC OS (AOS): Version 2.5.3.2
Boot Monitor: Version 1.5.4.1

Environment Status
Type: Temperature and Humidity Sensor AP9335TH