SRX showing temperature HOT alarms FPC 0 TSensor Hot(FPC 0 CPU 0 Die Temp Sensor Hot)
And the device automatically reboots.
Below logs and alarms are seen.
Dec 5 03:04:47 [Alarm SET] Object 143 reason 95 Device FRU FPC 0, reason FPC 0 TSensor Hot(FPC 0 CPU 0 Die Temp Sensor Hot), color 1, slot 0 Alarm id 2399141983
Dec 5 03:04:47 send: red alarm set, device FRU FPC 0, reason FPC 0 CPU 0 Die Temp Sensor Hot
Dec 5 03:04:54 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 91)
Dec 5 03:05:09 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 93)
Dec 5 03:05:54 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 91)
Dec 5 03:06:09 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 93)
Dec 5 03:06:54 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 91)
Dec 5 03:07:09 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 93)
Dec 5 03:07:54 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 91)
Dec 5 03:08:09 CHASSISD_SNMP_TRAP6: SNMP trap generated: Over Temperature! (jnxContentsContainerIndex 7, jnxContentsL1Index 1, jnxContentsL2Index 0, jnxContentsL3Index 0, jnxContentsDescr FPC: SRX4600 SPM @ 0/*/*, jnxOperatingTemp 92)
Dec 5 05:54:58 trace_log_init: configuring snmp tracing
Dec 5 05:54:58
CHASSISD release 21.2R3-S3.5 built by builder on 2022-10-19 05:17:53 UTC ------> The system has rebooted
The reasons for the FPC to heat up are:
--Either one of the FAN modules has gone faulty.
--Or the environment where the device is placed is not meeting the requirements.
Hence, the solution would be:
--Clean the Air Intakes/Fans.
--Re-seat the fans and PEMs after completely shutting down the device.
--Make sure that the temperature of the environment where the device is placed is meeting the requirements and is optimum for device operation.
--Clearance provided for the Airflow near the device is meeting the requirements.
For example, for 4600 devices:
Refer to: (Cleaning/Maintaining) https://www.juniper.net/documentation/us/en/hardware/srx4600/topics/topic-map/srx4600-maintaining-cooling-system.html
(Regarding the cooling system) https://www.juniper.net/documentation/us/en/hardware/srx4600/topics/concept/services-gateway-srx4600-cooling-system.html