Communication Error Between Main And Sub Unit Of Outdoor Unit Or Between Outdoor Units - Samsung AM080 XV Series Service Manual

4-3-5 Communication error between main and sub Unit of outdoor unit or between outdoor units

Outdoor unit
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost
Indoorunit
display ×
※ ●: ON ◑: Flash ×: OFF
Judgment
∙ Refer to the judgment method below.
Method
Cause of
∙ Communication error between outdoor units.
problem
1. Cause of problem
Check the outdoor unit with error.
(U200, U201, U202, U203)
Check connection of communication
wire between Indoor unit and
Check address of Outdoor unit.
Check operation of LED and
7-SEG each SUB UNIT normally.
Samsung Electronics
Timer Fan Filter/MPI Operation Defrost
× ◑ ◑
Reset error (Key 3)
Yes
Outdoor unit.
Yes
Yes
Yes
Replace MAIN PCB
Essential Requirements before Changing PCB in Case of Communication Error: Refer to p.59
Cassette (4/Mini4 Way)
× × ◑
No
No
Wall-mounted (NeoForte)
Timer Filter Operation Timer
◑ × ×
Change wiring or connect
Re-address Outdoor unit
Troubleshooting
Turbo
◑ ◑
4-21