Duration Frequency Description
Long beep (1.5 seconds) 3 (every 5 minutes) • A power error occurred.
• The system fan is not functioning.
• The fan module has been removed.
• The NAS data cannot be copied to the external
storage device connected to the front USB port.
2 • The storage pool is about to reach full capacity.
• The storage pool has reached full capacity.
• A storage pool status error occurred.
• The disk volume is about to reach its full
capacity.
• The disk volume has reached its full capacity.
• The drives are in degraded mode.
• The drive is rebuilding.
• The USB device is being removed (USB One
Touch Copy button).
• A drive is plugged in or out.
1 • The NAS is powering o.
• The NAS was powered o by force shutdown
(hardware shutdown).
• The NAS was powered on successfully and is
ready.
TS-x53E User Guide
Basic Operations 37
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