3U Turbo Nas (Ts-853U-Rp, Ts-1253U-Rp, Ts-1279U-Rp, Ts-Ec1279U-Rp, Ts-1679U-Rp, And Ts-Ec1679U-Rp Only) - QNAP HS-251 Hardware User Manual

3. Insert a new power supply unit and push it to the end.
4. Turn on the NAS.
Warning: The NAS supports replacing the redundant power supply unit without
turning off the server when redundant power supply mode is enabled. However, users are
strongly recommended to turn OFF the NAS before replacing the power supply unit to
reduce the risk of electric shock.
A second power supply unit can be installed on a single power (SP) rackmount NAS model
to upgrade the SP model to redundant power (RP) model.
10.3 2U/3U Turbo NAS (TS-853U-RP, TS-1253U-RP, TS-1279U-RP,
TS-EC1279U-RP, TS-1679U-RP, and TS-EC1679U-RP only)
Note: The following instructions should only be performed by an authorized and trained
technician.
To replace a failed power supply unit on the TS-1279U-RP, TS-EC1279U-RP, TS-1679U-RP
or TS-EC1679U-RP Turbo NAS, follow the steps below.
1. Turn off the NAS.
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