Communication Error Between Main And Sub Unit Of Outdoor Unit Or Between Outdoor Units - Samsung AM072FXVAFH series Service Manual

Troubleshooting

4-4-5 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. How to check
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.
4-32
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost Timer Fan
× × ◑ ◑
※ ● : ON ◑ : Flash ×: OFF
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)
Filter/MPI Operation Defrost Timer
× ◑ ◑
×
No
No
Wall-mounted (NeoForte)
Filter Operation Timer Turbo
× × ◑ ◑
Change wiring or connect
Re-address Outdoor unit
Samsung Electronics