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Fixed fan failure
The A5800-48G (1 slot), A5800-48G TAA (1 slot), A5800-48G-PoE+ (1 slot), A5800-48G-PoE+ TAA (1
slot), A5800-24G-PoE+, A5800-24G-PoE+TAA, A5800-24G, and A5800-24G TAA switches use fixed
fans. If a fan failure occurs, contact HP for help and do not attempt to fix the problem yourself.
Hot swappable fan tray failure
CAUTION:
You can replace a hot swappable fan tray without powering off the switch. To prevent the device from
overheating, replace the failed fan tray within 2 minutes for the A5800-48G-PoE+ (2 slots), A5800-
48G-PoE+ TAA (2 slots), A5800-24G-SFP (1 slot), A5800-24G-SFP TAA (1 slot), A5820X-24XG-
SFP+, A5820X-24XG-SFP+ TAA, A5820X-14XG-SFP+ (2 slots), and A5820X-14XG-SFP+ TAA (2
slots) switches.
CAUTION:
The A5800AF-48G and A5820AF-24XG switches require two same direction air flow fan trays to
function properly.
Do not operate the system with only one fan tray for more than 24 hours.
Do not operate the system without any fan tray for more than 2 minutes.
Do not operate the system outside of the temperature range 0°C to 45°C (32°F to 113°F) degrees.
Failure to comply with these operating requirements may void the warranty.
This section applies to the A5800-48G-PoE+ (2 slots), A5800-48G-PoE+ TAA (2 slots), A5800-24G-SFP
(1 slot), A5800-24G-SFP TAA (1 slot), A5800AF-48G, A5820AF-24XG, A5820X-24XG-SFP+, A5820X-
24XG-SFP+ TAA, A5820X-14XG-SFP+ (2 slots), and A5820X-14XG-SFP+ TAA (2 slots) switches.
To replace a failed fan tray, see ―Installing/removing a fan tray.‖
Configuration terminal problems
If the configuration environment setup is correct, the configuration terminal displays booting information
when the switch is powered on. If the setup is incorrect, the configuration terminal displays nothing or
garbled text.
No terminal display
If the configuration terminal displays nothing when the switch is powered on, verify the following items:
The power supply is supplying power to the switch.
The console cable is properly connected.
The console cable has no problem and the terminal settings are correct.
Garbled terminal display
If terminal display is garbled, verify that the following settings are configured for the terminal, for
example, HyperTerminal:
Baud rate—9,600
Data bits—8
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