CHS-1103：由于传感器无法读取、PSU降级警报
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问题描述
AFF-A250 系统可能会报告 CHASSIS POWER SUPPLY DEGRADED 和 CHASSIS OVER
尽管合作伙伴节点报告 PSU 正常，但还是发出了温度警报。
即使 EMS 日志显示 PSU 传感器无法读取，也会发生这种情况。
EMS log:
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Inlet is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Hot is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 FB Hot is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fan is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 2 is degraded: PSU2 Inlet is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 2 is degraded: PSU2 Hot is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 2 is degraded: PSU2 FB Hot is Unreadable
env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 2 is degraded: PSU2 Fan is Unreadable
power_low_monitor: monitor.chassisPower.degraded:alert]: Chassis power is degraded: Power Supply Status Critical: PSU2, PSU1.
power_low_monitor: callhome.chassis.power:error]: Call home for CHASSIS POWER DEGRADED: Power Supply Status Critical: PSU2, PSU1.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU1 Inlet) is not readable.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU1 Hot) is not readable.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU1 FB Hot) is not readable.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU2 Inlet) is not readable.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU2 Hot) is not readable.
env_mgr: monitor.temp.unreadable:error]: The controller temperature (PSU2 FB Hot) is not readable.
env_mgr: callhome.chassis.hitemp:error]: Call home for CHASSIS OVER TEMPERATUREPLATFORM-SENSORS.XML
PSU1 fru failed failed
PSU2 fru failed failed