Troubleshooting
Samsung Electronics 4-33
Communication error between main and sub Unit of outdoor unit or between outdoor units (cont.)
1. How to check
Essential Requirements before Changing PCB in Case of Communication Error : Refer to 63 page.
Check the outdoor unit that is failure occurs.
(U200, U201, U202, U203)
Check the power
No
Change wiring or connect
No
Change settings
No
Yes
Yes
Is the power supply normal?
15V, 5V
Check the wiring of outdoor unit
communication wire.
Confirmation of outdoor unit setup options
K13, K14
Yes
Reset error (Key 3)
Replace PCB
Yes
غ AM038/048/055KXWD
✳✳
Outdoor unit display
Indoorunit display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation
Defrost TimerFan Filter/MPI
Operation
Defrost Timer Filter
18℃ 21℃
Timer
24℃ 27℃
××◑◑
×
×◑◑×××◑◑×
※ ● :
ON
◑ :
Flash
× :
OFF
Judgment Method
Refer to the how to check below.
Cause of problem
Communication error between outdoor units.
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