Communication Error Between Main And Sub Micoms Of An Outdoor Unit Or - Samsung AVXCSH023/032/040CE Service Manual

4-3-20 Communication error between Main and Sub Micoms of an Outdoor unit or among Outdoor Units
Outdoor unit display
Indoor unit display
• Refer to the diagnosis method below
Criteria
• Communication error between outdoor units
Cause of problem
1. How to check
Confirm an error outdoor unit
(U200, U201, U202, U203)
Is power input normal?
wire-break in the external
communication line.
setup optionfor the outdoor unit
* If communication error occurs, please refer to pages 4-50 see essential pre-checkup details.
Samsung Electronics
x x x ( x x x : The address of the error occurred indoor unit)
Error reset (Key 3)
15V, 5V
Yes
Check if there is a
Yes
Check the
K13, K14
Yes
Replace PCB
No
Check power
No
Change the wire-break or
connection
No
Setup change
Troubleshooting
4-59