Hitachi GR4000 Series Installation Manual page 191

Step 3
replacement.
（See the section 4.5.4, which gives you the instruction related to the
attachment/detachment of the GR4000-80E2 power cable.）
DC power cable
Figure 5.4-20 DC power cable removed from the power supply unit
WARNING: MAKE SURE THAT THE CIRCUIT BREAKER OF A POWER FACILITY IS SET
Step 4
Screws
Figure 5.4-21 Screws to be removed from the power supply unit
520-10-014-20X
Remove the power cable from the power supply unit targeted for
TO OFF BEFORE ATTACHING OR REMOVING A DC POWER CABLE.
ATTACHING OR REMOVING A DC POWER CABLE WITH THE CIRCUIT
BREAKER SET TO ON WILL CAUSE AN ELECTRIC SHOCK.
Loosen the screws of the power supply unit.
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