Chassis power supply show critical status and SP reboot simultaneously

Applies to

FAS8200

Issue

• EMS shows Chassis Internal PSU can't be read and SP reboots due to hearbeat loss at the same time.

[?] Wed Aug 02 06:47:16 +0900 [node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Temperature is Unreadable
[?] Wed Aug 02 06:47:25 +0900 [node-01: power_low_monitor: monitor.chassisPower.degraded:alert]: Chassis power is degraded: Power Supply Status Critical: PSU1.
[?] Wed Aug 02 06:48:35 +0900 [node-01: spsm_listener: sp.heartbeat.stopped:error]: Have not received a IPMI heartbeat from the Service Processor (SP) in last 20 seconds.
[?] Wed Aug 02 06:51:21 +0900 [node-01: spsm_listener: callhome.sp.hbt.missed:notice]: Call home for SP HBT MISSED
[?] Wed Aug 02 06:53:14 +0900 [node-01: spsm_listener: sp.update.status:debug]: params: {'reason': 'sp_startup_notify_servprocd: SP startup handler has been called. '}
[?] Wed Aug 02 06:53:14 +0900 [node-01: spsm_listener: sp.heartbeat.resumed:info]: Received IPMI heartbeat from the Service Processor (SP).

• After SP reboot SP-LATEST-IPMI shows that the PSU status recover but multiple sensor show abnormal status.

Sensor Name | Current | Unit | Status | LCR | LNC | UNC | UCR
-----------------+------------+------------+------------+-----------+-----------+-----------+-----------
CPU0_Temp_Margin | na | degrees C | na | na | na | -5.000 | 0.000
In_Flow_Temp | -55.000 | degrees C | cr | 0.000 | 10.000 | 75.000 | 80.000
CPU_VCC | 0.010 | Volts | cr | 0.708 | 0.747 | 1.348 | 1.426
CPU_1.05V | 0.010 | Volts | cr | 0.892 | 0.941 | 1.154 | 1.203
CPU_VTT | 0.010 | Volts | cr | 0.931 | 0.989 | 1.213 | 1.261
LM56_Temp | na | degrees C | na | 0.000 | 10.000 | 72.000 | 77.000
CPU_1.5V | 0.010 | Volts | cr | 1.271 | 1.348 | 1.649 | 1.727
Bat_1.5V | 1.756 | Volts | cr | 1.280 | 1.348 | 1.649 | 1.727