5.1
Check Connections and DC Power Polarity
This procedure describes how to perform checks before turning on the power.
Step 1
Verify that all necessary cables are connected to the RU.
Step 2
Check the polarity of Pin A on the DC power supply, which should read –48 V.
Note:
The RU does not have a power switch. DC power is controlled by a circuit breaker at the DC power source.
Do not turn on the circuit breaker until it's time to power up the RU.
Note:
It takes less than one minute for the RU to fully power up.
Step 3
Verify weatherproofing is applied to each cable connector according to local guidelines.
Note:
Fujitsu recommends using industry standard UL approved self-fusing tape, but users may use any UL
approved weatherproofing material. Refer to
Weatherproofing RU Connections
for more information about
weatherproofing methods.
Continue with the next task.
Power Up
Check Connections and DC Power Polarity
128
Release 1.0
·
Issue 1.1, May 2021
Fujitsu and Fujitsu Customer Use Only
