Panasonic KX-FL501 - User Recoverable Errors

2.2. USER RECOVERABLE ERRORS
If the unit detects a problem, one or more of the following messages will appear on the display.
Note:
The explanations given in the [ ] are for servicemen only.
CROSS REFERENCE:
(P.7)
(P.30)
(P.120)
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KX-FL501