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Troubleshooting
12-59
Samsung Electronics
■
: Communication Error between Indoor Unit and Outdoor Unit during Tracking
Outdoor unit display
Indoor unit display
(Operation)
(Timer)
(Fan)
(Filter)
(Defrost)
Judgment method
Communication error between the indoor unit and outdoor unit
Causes
Setup error of the setting switch for setting the number of indoor unit’s to be installed.
Compare and check the setting switch’s
setup value for the indoor unit installation
number of the outdoor unit PCB with the actual
indoor unit installation number.
Press the reset key (K3) of the outdoor unit
PCB and check the number of the indoor unit
responding the tracking at display part.
Remove the communication wire connected
from the outdoor unit to the indoor unit and then
measure 2 wires of the outdoor unit with scope.
Is there any response of indoor unit at
display part during tracking?
Check the communication wire connected from the
outdoor unit to the indoor unit. If there is no defect,
search the indoor unit that interrupts the communication by
connecting the indoor unit one by one. After pre-checking
the wire, replace the indoor unit PCB.
Is the voltage
between both wires
square wave over
DC ±0.7V?
Is same the actual
indoor unit installation number and the setting
switch’s setup value for the indoor unit
installation number?
After right setting the setting switch’s
setup value for the indoor unit installation number
of the outdoor unit, perform the tracking again by
pressing the reset key (K3) of PCB.
Search for the indoor unit displayed the
communication error after 2 minutes and
check the duplication of PCB address setup.
(The communication error is occurred due to
address duplication.)
- In this case, the communication error is
occurred at every indoor unit (over 2 units)
set wrong address.
If there is no defect in address,
replace the indoor unit PCB after checking the
communication wire.
After checking the communication wire and
connector of the outdoor unit PCB, replace the
PCB.
Yes
Yes
Yes
No
No
No
Summary of Contents for mini DVM Series
Page 48: ...MEMO 2 38 Samsung Electronics ...
Page 174: ...MEMO 5 36 Samsung Electronics ...
Page 180: ...MEMO 5 42 Samsung Electronics ...
Page 184: ...MEMO 5 46 Samsung Electronics ...
Page 188: ...MEMO 5 50 Samsung Electronics ...
Page 192: ...MEMO 5 54 Samsung Electronics ...
Page 484: ...MEMO 12 73 Samsung Electronics ...
Page 514: ...14 18 Samsung Electronics Reference Information Thermodynamic characteristic of R410A ...
Page 520: ...MEMO 14 24 Samsung Electronics ...
Page 521: ...MEMO Samsung Electronics 14 25 ...