Communication Error Between Main And Sub Unit Of Outdoor Unit Or Between Outdoor Units - Samsung AM056FN2DEH Series Service Manual

Troubleshooting

4-4-26 Communication error between main and sub Unit of outdoor unit or between outdoor units

Outdoor unit display
Indoor unit display
Criteria ∙ Refer to the judgment method below.
Cause of problem ∙ Communication error between outdoor units.
1. Cause of problem
Check the outdoor unit with error.
Is the power supply normal?
Check wiring of outdoor unit
446
Reset error (Key 3)
(U200, U201, U202, U203)
15V, 5V
Yes
communication cable.
Yes
Check K13 and K14 setup
options for outdoor unit.
Yes
Replace PCB.
No
Check the power
No
Change wiring or connect
No
Change settings
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