Samsung AVMKH020EA0 Service Manual page 242

8-2-59. MCU Dip switch setup error
Outdoor unit display
MCU display
Judgment method
Causes
Find indoor unit and MCU address that
occurred communication error,
through outdoor unit PCB or MCU PCB.
Check indoor unit
installation status to MCU.
DIP switch for indoor unit
set OFF even though indoor unit
was installed.
Replace MCU PCB.
, , and
, and
- W
- DIP switch for indoor unit setting was off position even though indoor unit was connected.
No
- 241 -
are displayed alternately.
are displayed alternately.
Yes
Set the switch of branch sphere
not used to ON.
Troubleshooting