Troubleshooting By Symptoms; Communication Error After Nishing Tracking - Samsung AE050JXYDEH Service Manual

4-2 Troubleshooting by symptoms

4-2-1 Communication error after finishing Tracking
Indoor unit display
Symptom
Failure
Is there a response from the Control Kit PCB?
(LED02 (GRN) is not ON)
Remove the communication cable
connecting the outdoor unit to Control Kit
and measure the signal on LINE 2 of the
outdoor unit with a scope
voltage waveform between the lines square
wave with amplitude over ±0.7V as shown
in the following picture?
Reconnect the cable connecting
the outdoor unit to the Control Kit
If the communication still doesn't work,
replace the Control Kit PCB.
+0.7V
-0.7V
26
Communication error between the Control Kit and outdoor unit for two minutes
Communication error between the Control Kit and outdoor unit
LED02
Yes
F3, F4
In this case, is the
Yes
and restart the unit.
Good
No
Check the communication cable and
replace the Control Kit PCB
No
Check the communication
cable in the outdoor unit PCB
and replace the PCB
Bad
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