Communication Error Between Indoor/Outdoor Units (1Min) - Samsung JH035EAV Series Service Manual

Troubleshooting Operating Instructions and Installation
4-3-14 Communication error between indoor/outdoor units (1min.)
1. Inspection items
1) Is the communication line between indoor and outdoor units connected properly?
2) Is there a communication connection between power line and communication line?
2. Inspection order
Restart after turning off the power
Is there a communication error?
Is there a communication
connection between power line and
communication line?
Is the outdoor terminal
block F1–F2, less than DC5V?
When measuring F1–F2, the outdoor
terminal block, if the voltage varies
(communicates) below DC5V, the connection
status of the connection line is normal.
4-26
Yes
Yes
Yes
No
Terminate service
No
Connection line checkup
No
Replace PCB of the outdoor unit
after turning off.
Samsung Electronics