RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF)Īirflow has stopped to prevent blowing out of cold air until the indoor heat exchanger has warmed up. The three-minute protection timer in the microcomputer auto- matically starts it up again.Īirflow is not blown out when starting the HEATING opera- tion. Restart is blocked for 3 minutes after you have stopped the op- eration to protect the unit. The unit does not restart immediately after you have stopped it. Is there any direct sunlight entering the room? Have you set the thermostat at a suitable temperature? Is there a power failure or a blown fuse? ![]() Has the timer been set in the “ON" position? The air-conditioner does not work at all. Mitsubishi DXK09Z5L-S air conditioner troubleshooting
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