Troubleshooting
4-72 Samsung Electronics
4-3-55 Indoor unit and MCU address duplication error
Outdoor unit display
- A00X (X : Address of duplicate indoor unit)
Indoor unit display
Operation Defrost Timer Fan Filter/EMI
× ×
◑ ◑
×
※ ● : ON ◑ : Flash ×: OFF
Judgment Method
Refer to the judgment method below.
Cause of problem
∙ Indoor unit and MCU address duplication.
1.
Cause of problem
Yes
No
MCU
Indoor unit
Has E108 occurred?
E108 occurring machine
After completely tracking the outdoor unit,
check the occurrence of E108.
Check the machine where the error occurred in the
outdoor unit display:
- If SEG1 is A, an indoor unit; and
- If SEG1 is C, MCU.
Reset the address of the unit whose address is duplicated.
Press the reset key (K3) of the outdoor unit PCB to track
or reset the whole system to rerun.
Find a unit whose address is duplicated in the manual address
view on the view mode of the outdoor unit display. (If there is an
address that does not appear in the manual address view even
though a unit is actually installed, the address is duplicated.)
e.g.) When the following is displayed in the view mode at the
site where No. 0 to 4 are installed, possible to judge that the
address of no. 3 indoor unit is duplicated.
A000 ⇀A001 ⇀ A002 ⇀ A004
※ Check the manual address view in the view mode.
(Press K4 Switch long to enter)
End
Check the rotary switch of the address of
the installed MCU to check any duplicate address.
※ K3 reset
- When the system is reset through K3 reset, the previous error (E108) on the display is
sometimes indicated. This indicates the error left previously in the indoor unit during
the course of performing resetting and addressing the whole system after the outdoor
unit is reset.
When addressing is completed, the error indication disappears (up to 5 minutes
required).
※ Whole system power reset
- To solve the problem through the power reset after the address is reset the power
reset of individual units is meaningless and the power of the whole system must be
reset.
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