Mitsubishi Electric PAAA18AA1 Installation Manual page 101

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 microcom-
puter)
LED 2 (power for remote
controller
LED 3 (communication be-
tween indoor and outdoor
units)
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.
101 © 2022 Mitsubishi Electric US, Inc.