Remotec ZXT-120 V1.1 - Manual (Page 14)

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Press “power on” button on the
original air conditioner remote.
If the learning is failed, repeat step 3
to step 5.
To learn next IR code, repeat step 2
to step 5.
L When you encounter problem, check followings:
− Make sure your original remote is switched to power off.
− Press the key on original remote before learning mode
timeout.
− Keep away from incandescent light and direct sunlight during
learning.
− Make sure IR Transmitter of your original remote alight with
learning diode of ZXT‐120, you may also slight adjust closer or
further away the distance of two devices. Some of remotes
the IR transmitter in hidden behind lens and may not installed
center of remote.
− Make sure the power is good on both devices, especially the
original remote. Use fresh batteries.