Epson EMP-X56 - Manual (Page 8)

ESC/VP21 Command User's Guide for Business Projectors
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6.3.Warning and abnormal cases
Projector executes commands normally while a warning indicator such as a high temperature warning is on.
Projector does not execute commands nor return a colon when the projector is in an abnormal state such as a lamp failure and abnormal high
temperature.
As for EMP-6100/6000, EMP-1715/1710/1705/1700, EMP-1815/1810, EMP-S5/X5/83/822 and the following models, when an abnormal
state is continued for 130 seconds after, PWR ON command becomes possible.