Troubleshooting
Samsung Electronics
85
4-3-5
Communication error between main and sub Unit of outdoor unit or between outdoor
units
1. Cause of problem
Essential Requirements before Changing PBA in Case of Communication Error: Refer to p.59
Check the outdoor unit with error.
(U200, U201, U202, U203)
Check operation of LED and
7-SEG each SUB UNIT normally.
Change wiring or connect
No
Re-address Outdoor unit
No
Yes
Yes
Check connection of communication
wire between Indoor unit and
Outdoor unit.
Check address of Outdoor unit.
Replace MAIN PBA
Yes
Reset error (Key 3)
Yes
Outdoor unit
display
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing
Cassette (4/Mini4 Way)
Wall-mounted (NeoForte)
Operation Defrost Timer Fan Filter/MPI Operation Defrost Timer Filter Operation Timer Turbo
×
×
◑
◑
×
×
◑
◑
×
×
◑
◑
※ ●
: ON
◑
: Flash ×: OFF
Judgment
Method
• Refer to the judgment method below.
Cause of
problem
• Communication error between outdoor units.
4-3 Appropriate Measures for Different Symptom (cont.)
