Samsung AVXC1H022 series Service Manual page 315

Troubleshooting
I
: MCU indoor unit address setup error
Outdoor unit display
Indoor unit display
Judgment method
Causes - Indoor unit connected with confluence kit and setting address was overlapped more than 3.
Check the error of outdoor unit display part
and find a MCU occurring error.
Check the address of indoor unit
connecting with confluence kit and the
address of rotary switch on MCU PCB.
Is not 3 over of rotary switch of
No
MCU set to the same address?
Restart after setting correctly
the indoor unit address setup
Yes
rotary switch of MCU.
If the error is occurred after restarting with a change of
confluence kit setup DIP switch of MCU and indoor unit
address setup, replace MCU PCB.
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