Sanyo MDF-U500VX - Power Failure Alarm Troubleshooting; Power Failure Alarm Flowchart

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NO
(Unit is in normal condition)
㪰㪜㪪
㪥㪦
㪰㪜㪪
NO
㪰㪜㪪
NO
YES
䋨Alarm indication䋩
䊶Backlight turns off
䊶"Warning" indicates in reverse and non-reverse characters
䊶"Status_2" indicates in reverse and non-reverse characters
䊶Message "Power failure Warning 20XX/XX/XX XX:XX"
䊶ALARM lamp blinks
䊶Audible alarm sounds intermittently
Is there notice of power
failure alarm during power
f
a
il
u
r
e
?
Check if battery switch is in ON position
Check for battery accumulation time
䋨Assumed battery life: 3 years䋩
䊶Check if there is power failure occurred in power supply
䊶Check for connections of power cord
䊶Check for chamber temperature
䋨Condition䋩
If a power failure is occurred
when battery switch is in ON
Power failure alarm
Is there notice of power
failure alarm after power
failure?
Is BUZZER key
pressed?
䋨Alarm indication䋩
䊶Message "Power failure Warning 20XX/XX/XX XX:XX"
䊶Audible alarm sounds intermittently
䊶ALARM lamp goes off
䊶Audible alarm silences