Troubleshooting
4-26 Samsung Electronics
4-4-3- Communication Error between Indoor and Outdoor Units during Tracking
1.
How to check
Yes
Indoor Unit Installation Quantity Setup Switch of
Outdoor Unit Compare and check the set value
and the actual number of indoor units installed.
Press the reset key (K3) of the outdoor PCB, and
check the display module to check
for the quantity
of indoor units that respond to the tracking.
Remove the communication cable which connects
the outdoor unit to the indoor unit, and measure
the 2 cables of the outdoor unit with a scope.
Is there no sign of
the indoor response on the
display
during tracking?
Check the communication cable
which connects the outdoor unit to the indoor unit.
If there is no peculiarity, then connect the indoor units one
by one to find the indoor unit that is interfering with the
communication for inspection and cha
nge the indoor unit PCB.
Is the voltage between
the 2 cables a square wave with DC±0.7V or more
as shown in the image below?
Are the number of
actual installed indoor units and the set value for
the installation quantity setup
switch the same?
Correctly s
et the indoor unit installation quantity
setup switch of the outdoor unit, and press the
reset key (K3) of the outdoor PCB to re-execute
tracking.
After 2 minutes, find the indoor unit which displays
the communication error for the indoor units, and
check for overlaps in the PCB address setup.
(If the indoor unit addresses are overlapped,
then a communication error will occur).
- In this case, a communication error will occur
in every indoor unit (two or more units) with
the address incorrectly set.
Change the indoor unit PCB af
ter checking
the communication cable when there is
no peculiarity with the address.
Check the communication cable and the
connector of the outdoor unit PCB,
and change the PCB.
Yes
No
No
No
* Essential Requirements before Changing PCB
in Case of Communication Error: Refer to p.50
Yes
0.7V
0.7V
Good
Defective
Outdoor unit display
Indoorunit display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation
Defrost TimerFan Filter/MPI
Operation
Defrost Timer Filter
Operation
TimerTurbo
24℃ 27℃
××◑◑
×
×◑◑××◑◑◑×
※ ● :
ON
◑ :
Flash
× :
OFF
Judgment Method
Communication error between indoor and outdoor units.
Cause of problem
Refer to the judgment method below..
To Next Page
Loading...
