Communication Error Between Indoor And Outdoor Units After Tracking - Samsung AM006JNFDCH/AA Service Manual

Troubleshooting

4-4-23 Communication Error between Indoor and Outdoor Units after Tracking

Outdoor unit display
×(Operation)
Indoorunit display
Judgment Method ∙ Outdoor unit is unable to communicate for two minutes during operation. (no reception of relocation)
∙ Communication error between indoor and outdoor units and setup error of indoor unit installation quantity setup switch.
Cause of problem
1. Cause of problem
Press the reset key (K3) of the outdoor unit PCB
response at all from the display module during
Remove the communication cable that connects
the outdoor unit to the indoor nit, and measure
the 2 outdoor unit cables with a scope.
the 2 cables a square wave with DC±0.7V or more
Connect the communication cable again to
connect the outdoor unit to the indoor unit.
Remove all the communication connectors on the PCB of
the indoor unit, and connect them one by one to find
the indoor unit which interferes with the communication
to check and change the indoor unit PCB.
0.7V
0.7V
4-58
(Reservation)
and check the display module.
Is there no indoor unit
the tracking?
Yes
Is the voltage between
as shown in the image below?
Yes
(Blast) ×(Filter) ×(Defrost)
No
After two minutes, find the indoor unit which displays
the communication error and check if the PCB address
(Communication error occurs if the indoor unit
- In this case, the communication error will occur in every indoor
unit (2 or more units) with the address incorrectly set.
If there is no peculiarity in the address, check
the communication cable and change the indoor unit PCB.
No
* Essential Requirements before Changing PCB in
Case of Communication Error: Refer to p.50
Good
settings are overlapped.
addresses are overlapped.)
Check the communication cable and the
connector for the outdoor unit PCB,
and change the PCB.
Defective
Samsung Electronics