Samsung AVXTJH028EE - Page 173

Troubleshooting
Samsung Electronics 4-82
4-5-23 Communication error between main and sub Micom of outdoor unit or between outdoor units

x x x
(
x x x
:
Address of the indoor unit with error )
t'BVMUZDPNNVOJDBUJPOCFUXFFOPVUEPPSVOJUT
t3FGFSUPUIFKVEHNFOUNFUIPECFMPX
Indoor Unit Display
Judgment Method
Special Cause
Outdoor Unit Display
1. Faulty communication between outdoor units
Reset error (Key 3)
Check the outdoor unit with error
(U200, U201, U202, U203).
Is the power supply normal?
15V, 5V
Check wiring of outdoor unit
communication cable.
Check K13 and K14 setup
options for outdoor unit.
Change PCB.
Check power.
Change wiring or connect.
Change settings.
Yes
Yes
Yes
No
No
No
❈ Essential Requirements before Changing PCB in Case of Communication Error: Refer to p.4-80
$9;&6+B$BaLQGG 