Samsung AE050JXYDEH Service Manual

Also see for AE090JXYDEH: User manual Service manual Technical data

Contents

36 Samsung Electronics4-5 Troubleshooting by symptoms4-5-1 Communication error after finishing tracking (E202)1. Check items1) Is the communication cable short/open?2) Is there a response from the Hydro unit PCB?2. Check procedureNoYesIs there a response from the Control Kit PCB?(LED01(RED) in NOT blinking)NoYesIn this case, is thevoltage waveform between the lines squarewave with amplitude over ±0.7V as shownin the following picture?+0.7V-0.7VGoodBadCheck the communication cable andexchange the Control Kit PCBRemove the communication cableconnecting the outdoor unit to Control Kit,and measure the signal on LINE 2 of theoutdoor unit with a scopeReconnect the cable connectingthe outdoor unit to the indoor unitand restart the unit.If the communication still doesn’t work,replace the comm. kit PCB andCheck the communicationcable in each PCBand replace the PCBYesIs the power/communicationcable connected correctly?No Connect the power/communicationcable correctly.outdoor unit PCB in order of mention.cf.) If there is no oscillo scope, it can be replaced multimeter instead of osillo scope.