Lenovo NeXtScale n1200 Installation And Service Manual page 115

Power supply is connected to 110v AC.
Severity
Info
Serviceable
Automatically notify support
User Response
1. No user action needed.
• 78 : PS4_OT_Warning
Power supply internal temperature has reached warning threshold. Over temperature fault is possibiliy to
occur if condition not relieved.
Severity
Warning
Serviceable
Automatically notify support
User Response
Complete the following steps:
1. Make sure that there is no obstrcution blocking power supplies and system fans' air way.
2. Make sure that power supplies does not have any fault condition.
3. Make sure that room temperature is maintained at required level.
4. Make sure that all fan modules are installed and operating properly.
5. Make sure that power supplies fans are running with higher speed than system fan.
6. If condition presists after above inspection, reseat power supply.
7. If OT warning continues to present after power supply reseat, replace power supply.
• 79 : PS4_No_Present
Power supply was removed from chassis.
Severity
Info
Serviceable
Automatically notify support
User Response
1. No user action needed.
• 80 : PS5_FANFault
Power supply 5 fan has fail condition.
Severity
Critical
Serviceable
Automatically notify support
User Response
Complete the following steps:
1. Check PSU power cord, reseat PSU.
Appendix A. Fan power control (FPC) error codes
103