Panasonic TK7585-SHK Instruction Manual page 96

Inspection Check the Alkaline Ionizer you've been using for years!
the following
1048, Kadoma, Osaka 571-8686, Japan
Nothing appears on the
LCD display even though
the power plug has been
connected.
Are any of
An error code (U21 to
U28) has appeared, and
symptoms it re-appears even after
taking remedial action.
applicable?
An error code (H31 to
H39) has appeared.
Some other trouble or
failure has occurred.
Printed in Japan
If any of these symptoms
have occurred,
disconnect the power
plug from the power
outlet in order to prevent
accidents, and be
absolutely sure to ask
your dealer to check out
your unit.
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