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Samsung Electronics
3. How to take measures for each symptom
3-1 Communication error between indoor and outdoor units during tracking
(Error Code : E201)
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 squire wave
with DC±0.7V?
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
