Samsung Electronics 35
3-2. Communication error between indoor and outdoor unit. (E-201)
Indoor unit installation quantity setup switch of
outdoor unit compare and check the set value and
the actual number of indoor units installed.
Are the
number of actual installed
indoor units and the set value for the
installation quantity setup switch
the same?
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.
Is there no sign of
the indoor response on
the display during
tracking?
Correctly set the indoor unit installation quantity setup
switch of the outdoor unit, and press the reset key (K3)
of the outdoor PCB to retracking
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 the voltage between
the 2 cables a square
wave with DC ± 0.7V
or more?
After 2 minutes, nd 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 after checking
the communication cable when there is
no peculiaritywith the address.
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 nd the
indoor unit that is interfering with the communication
for inspection and change the indoor unit PCB.
Check the communication cable and the connector
of the outdoor unit PCB, and change the PCB.
Yes
No
No
No
No
Yes
Yes
To Next Page
Loading...
