Samsung AVXCSH023/032/040CE, Руководство по обслуживанию, Страница: 194 / 363

Troubleshooting
Samsung Electronics 4-110
4-4-16 Communication error between Indoor and Outdoor units during Tracking
×(Operation) ◑ (Timer) ◑ (Fan) ×(Filter) ×(Defrost)
• Refer the below
• Communication error between indoor and outdoor units
Indoor unit display
Criteria
Cause of problem
Outdoor unit display
1. How to check
Yes
Yes
Compare the number of setting values of
setup switch for the number of indoor unit
installed for the outdoor unit PCB and the
number of actual indoor units installed.
Press the reset key (K3) of the outdoor unit PCB
then check the display part to see the number
of indoor units responding to the tracking.
Remove communication line from the outdoor
unit to indoor units then measure 2 lines on the
outdoor unit with SCOPE.
Is there any response from indoor units
on the display part during tracking?
Check the communication line from the outdoor unit
to indoor units and if there is no problem, find an
indoor unit that hampers communication by making a
connection to each unit and replace the indoor unit PCB
after checking out lines.
At that time, is the power between
the 2 lines a square wave with DC±0.7?
Is the number of actual
indoor units installed and the number
of setting values of setup switch for the number of
indoor unit installed
identical?
Set the correct number of indoor units on the
outdoor unit switch and press the reset key (K3)
on the outdoor unit PCB to execute tracking.
After 2 minutes, find an indoor unit that shows a
communication error then check if PCB address
setup has overlapped.
(If an indoor unit's address is overlapped,
communication error occurs)
- In that case, all indoor units with wrong
address setup for more than 2 will have
communication error.
If there is any problem with the address,
check the communication line then replace
indoor unit PCB
Check the outdoor unit PCB communication line
and connector then replace the PCB
Yes
No
No
No