Troubleshooting
Samsung Electronics
4-61
4-4-6. Communication error after finishing Tracking (E202)
+0.7V
-0.7V
Good
Bad
No
Yes
Yes
In this case, is the
voltage waveform between the lines square wave
with amplitude over ±0.7V as shown
in the following picture?
No
Is there a response from the indoor PCB?
(LED01 (RED) is not ON)
Check the communication cable and
replace the indoor unit PCB
Reconnect the cable connecting the outdoor unit
to the indoor unit and restart the unit.
If the communication still doesn’t work,
replace the indoor unit PCB.
Check the communication
cable in the outdoor unit PCB
and replace the PCB
LED01
Remove the communication cable
connecting the outdoor unit to indoor unit,
and measure the signal on LINE 2 of
the outdoor unit with a scope
Display
Outdoor Unit display
E202
Wired remote Control, Wind Free RAC
E202
Duct, 1way Cassette
4way Cassette,
4way Cassette(600x600)
MAX4
Console
360 Cassette
or
or
or
GRN
◑
Duct
Blue
Red
1way
Blue Yellow
X
X
◑
◑
X
X
◑
◑
X
X
◑
◑
X
◑
◑
X
X
Judgment
method
Refer to checking method, as shown below
Symtom
Communication error between the indoor and outdoor unit for two minutes
