Panasonic WV-CU20 - Manual (Page 17)

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The following installations should be made by qualified service personnel or system installers and should conform
to all local codes.
For permanetly connected unit, a readily accessible disconnection device shall be incorporated in the fixed wiring:
An ALL-POLE MAINS SWITCH with a contact separation of at least 3 mm in each pole in the electrical installation
of the building
An easily accessible wall-outlet to unplug the power cord of the unit
An easily accessible AC inlet to unplug the power cord of the unit
[To working personnel]
Prior to starting work, turn off the power supply and pull out the power plug out of the wall outlet.
Inform the user of the fact that more than 48 hours of charging is required for initial usage after the completion of con­
nections.
Operation of the clock used in this unit is sustained by backup operation of the built-in battery. When this unit is initially used,
continuous charging is needed for more than 48 hours so that the backup battery can be charged up. in the following cases,
the clock may become out of order:
• Lack of charging time
• A service interruption continued for a long time
• The POWER switch has been set at OFF for a long time, or the power plug has been left disconnected from the wall outlet.
If the clock becomes out of order, set the clock again.
The contents of the abbreviated directory and various setting data are stored in nonvolatile memory, and they cannot be lost
even if there is a service interruption.
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