Epson EMP-7350 Owner's Manual page 111

The temperature indicator is red.
The projector is overheating, which turns the lamp off
automatically. Let the projector cool for a few minutes,
then turn it back on. Make sure nothing is blocking the
ventilation vents.
The air filter may be clogged. Clean it as described in
Chapter 5 and then let the projector cool for a while.
If the projector continues to overheat after you clean the air
filter, the problem may be caused by damage to the cooling
fan or internal circuits. Contact a qualified service person.
Warning: Do not attempt to service this product yourself except
as specifically explained in this User's Guide.
Problems with the Projector 91