Panasonic KX-T4300BA - Manual (Page 59)

The Call-Counter shows “E” (Error), or 6 quick beeps sound
during greeting message recording, and It results in failure.
—Re-record your greeting message. Speak clearly and loudly, and do
not pause for over 2 seconds while recording.
The answering system is on, but no incoming messages are
recorded.
The Call-Counter shows “E” (Error) when you return.
—The cassette tape is cut or is not inserted. Insert the tape or replace
it with a new one.
—The greeting message is recorded improperly or not recorded, so
no one can leave a message. Check and record a new greeting
message.
A beep sounds every 10 seconds on the base unit.
—New messages are recorded. Play back the messages.
i cannot operate the answering system by using the button of the
base unit.
—The portable handset user Is operating the answering system or
having a conversation. After the IN USE indicator or
IN USE/INTERCOM indicator light goes out, try again.
I cannot operate the answering system from a touch tone phone.
—Be sure that you press your correct remote code number.
—In some areas, a remote touch tone phone may not function due to
telephone line conditions such as line noise, echo, etc.
—The answering system may not respond if a touch tone phone
produces tones which are too short to activate the unit. Press each
button firmly and long.
—The answering system is off. Turn It on. (p. 44)
When the tape is played back, the sound level is low, even If the
VOLUtyiE control is set to maximum position.
—Clean the heads, (p. 56)
Some incoming messages have not been recorded up to their
end.
—Set the VOX SENS selector to the LOW position, (p. 17)
When pressing the SCREEN/PLAYBACK button, the
SCREEM/PLAYBACK indicator flashes.
I cannot operate the answering system with the portable handset.
—Press “#” to turn on the answering system, (p. 52)