Acer H9500BD - Manual (Page 44)

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OSD Messages
# Condition Message Reminder
1 Message Fan Fail - the system fan is not working.
Projector Overheated - the projector has exceeded its
recommended operating temperature and must be allowed to
cool down before it may be used. Please also check the dust
filters if they are installed. If the dust filter is clogged with
dust, please clean it. Please refer to "Cleaning and replacing
the dust filter" for details.
Replace the lamp - the lamp is about to reach its maximum
lifetime. Prepare to replace it soon.