CFBMC-1667: Storage system prematurely reports coin cell battery LNC and LCR threshold errors

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Category:: ontap-9

Specialty:: HW

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Issue

Event monitor.rtcHighPower and monitor.rtcNormal are reported in EMS log
[NODE-02: env_mgr: monitor.rtcHighPower:error]: Real-time clock battery voltage is above normal (P3.3V Batt is warning high (3307 mV).). [NODE-02: env_mgr: monitor.rtcNormal:notice]: Real-time clock battery voltage is normal
P3V3_BATT: Voltage Sensor 26 UNC is shown in system controller service-event show
::*> system controller service-event show Node ID Event Location Event Description ---------------- --- ---------------------------------- ---------------------- NODE-02 1 Controller B on Chassis 1 P3V3_BATT: Voltage Sensor 26 UNC
P3V3_BATT Status shows nc in bmc status -d

ipmi_sensors
     ============
     Sensor Name      | Current    | Unit       | Status     | LCR       | LNC       | UNC       | UCR
     -----------------+------------+------------+------------+-----------+-----------+-----------+-----------
     P3V3_BATT        | 3.308      | Volts      | nc         | 2.538     | 2.695     | 3.308     | 3.448