Audio alert
Duration
Frequency
Description
Short beep (0.5 seconds) 1
• The NAS is starting up.
• When the reset button is pressed for 3 seconds,
the NAS resets configurations.
• When the reset button is pressed for 10 seconds,
the NAS resets configurations and reboots.
• The operating system was updated.
3
Cannot detect installed disk.
Long beep (1.5 seconds)
3 (every 5 minutes)
• A power error occurred.
• A system fan is not functioning.
• A fan module has been removed.
2
• A storage pool is about to reach full capacity.
• A storage pool has reached full capacity.
• A storage pool status error occurred.
• A disk volume is about to reach its full capacity.
• A disk volume has reached its full capacity.
• A volume status error occurred.
• A drive is plugged in or out.
• The iSCSI is about to reach full capacity.
1
• The NAS was powered off by force shutdown
(hardware shutdown).
• The NAS was powered on successfully and is
ready.
Long and short beeps
1 long and 2 short beeps The JBOD expansion unit has been removed.
Reset button
Important
• The default "admin" account is automatically enabled after the system reset.
• To protect your device from brute force attacks, QNAP recommends disabling the
default "admin" account after a system reset. To disable the account, change the
default admin password, log out of QTS, and then log in to QTS with another admin
account.
TS-855eU User Guide
Basic Operations
49
