Samsung AVXCSH022EE, Руководство по обслуживанию

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Troubleshooting
4-81 Samsung Electronics
Outdoor Unit Display
4-5-22 Communication Error between Indoor and Outdoor Units after Tracking
×(Operation) (Reservation) (Blast) ×(Filter) ×(Defrost)
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setup switch
Indoor Unit Display
Judgment Method
Special Cause
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1. Inspection Method
0.7V
0.7V
Good
Bad
Press the reset key (K3) of the outdoor unit
PCB and check the display module.
Is the voltage between the
2 cables a square wave with DC±0.7V or more
as shown in the image below?
Is there no indoor unit response
at all from the display module
during the tracking?
Remove the communication cable that connects
the outdoor unit to the indoor nit, and measure the
2 outdoor unit cables with a scope.
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.
After two minutes, find the indoor unit which displays
the communication error and check if the PCB address
settings are overlapped. (Communication error occurs if the
indoor unit addresses are overlapped.)
- In this case, the communication error will occur in every
indoor unit (2 or more units) with the address incorrectly set.
Check the communication cable and the
connector for the outdoor unit PCB, and
change the PCB.
If there is no peculiarity in the address, check the
communication cable and change the indoor unit PCB.
Yes
No
No
Yes
❈
Essential Requirements before Changing
PCB in Case of Communication Error:
Refer to p.4-80
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