Communication Error Between Main And Sub Unit Of Outdoor Unit Or Between Outdoor Units - Samsung AM007FN1DCH/AA Service Manual

4-4-24 Communication error between main and sub Unit of outdoor unit or between outdoor units

Outdoor unit display
-
Indoorunit display
Judgment Method ∙ Refer to the judgment method below.
Cause of problem ∙ Communication error between outdoor units.
1. Cause of problem
Check the outdoor unit with error.
Is the power supply normal?
Check wiring of outdoor unit
Samsung Electronics
Reset error (Key 3)
(U200, U201, U202, U203)
15V, 5V
Yes
communication cable.
Yes
Check K13 and K14 setup
options for outdoor unit.
Yes
Replace PCB.
Essential Requirements before Changing PCB in Case of Communication Error: Refer to p.59
No
Check the power
No
Change wiring or connect
No
Change settings
Troubleshooting
4-63