Troubleshooting
Samsung Electronics
61
4-3-4 Communication tracking error(E604)
1. Check procedure
No
Yes
No
Yes
Is there a response from the CONTROL KIT PCB?
(LED900 (red) is ON)
In this case, is the
voltage waveform between the lines square
wave with amplitude over ±0.7V as shown
in the following picture?
+0.7V
-0.7V
Good
Bad
Check the communication cable and
replace the CONTROL KIT PCB.
Remove the communication cable between
CONTROL KIT and the OUTDOOR UNIT, and
measure the LINE 2 (F3,F4) signal of the outdoor
unit with a scope.
Reconnect the cable and reset the power.
If the problem is not solved, replace the
communication PBA and
the OUTDOOR UNIT PCB.
Check the communication cable in the
OUTDOOR UNIT PCB and replace the PCB.
LED900
