Troubleshooting
Samsung Electronics 4-67
4-4-24 Communication error between main and sub Unit of outdoor unit or between outdoor units
Reset error (Key 3)
Check the outdoor unit with error.
(U200, U201, U202, U203)
Is the power supply normal?
15V, 5V
Check wiring of outdoor unit
communication cable.
Check K13 and K14 setup
options for outdoor unit.
Replace PCB.
Check the power
Change wiring or connect
Change settings
Ye s
Ye s
Ye s
No
No
No
1.
Cause of problem
Essential Requirements before Changing PCB in Case of Communication Error: Refer to p.59
Outdoor unit display
Indoor unit display
-
Judgment Method
Refer to the judgment method below.
Cause of problem
Communication error between outdoor units.
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