Mitsubishi Electric PAA-A18AA1 Manuel D'installation page 97

NOTE
Operation is not possible for about 30 seconds after cancellation of function selection.
(Correct operation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED 1 (power for
microcomputer)
LED 2 (power for remote
controller
LED 3 (communication
between indoor and outdoor
units)
16.4. Auto restart function
Indoor controller board
This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the
fan speed are memorized by the indoor controller board.
The auto restart function works after power is restored after a power failure. The unit will restart
automatically approximately 4 minutes after power is restored.
Set the AUTO RESTART FUNCTION using the remote controller. (Mode no. 01)
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
Indicates whether control power is supplied. Make sure that this
LED is always lit.
Indicates whether power is supplied to the remote controller. This
LED lights only in the case of the indoor unit which is connected to
the outdoor unit refrigerant address "0".
Indicates state of communication between the indoor and outdoor
units. Make sure that this LED is always blinking.
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