Communication Error Between Indoor And Outdoor Unit After Tracking - Samsung AG042KSVANH Service Manual

4-3-4. Communication error between indoor and outdoor unit after tracking

Inverter / Hydro control part display
Judgment Method
Cause of problem
1. Inspection Method
Press the reset key (K3) of the outdoor unit
PCB and check the display part.
response at all from the display part during
Remove the communication cable which
connects the hydro to the outdoor unit, and
measure the 2 wires of the outdoor unit
the 2 cables a square wave with
Check the communication cable which connects
the hydro to the outdoor unit.
If there is no peculiarity, replace the Hydro PCB.
0.7V
0.7V
If the hydro and outdoor unit is unable to communicate for 2 minutes during operation.
Communication error between hydro and outdoor unit.
Is there no hydro
the tracking?
Yes 예
side with a scope.
Is the voltage between
DC±0.7V or more?
예
Yes
아니오 No
Check the communication cable and
then replace the Hydro PCB.
If there is no peculiarity in the address, check the
communication cable and replace the indoor unit PCB.
No
아니오
Check the communication cable and the
connector of the outdoor unit PCB side,
Good
43
and replace the PCB.
Defective