Samsung AM080FXWANR, Service Manual, Page: 142 / 295

Troubleshooting
Samsung Electronics 139
4-3-50 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
× ×
ስ ስ
×
※ ●
: ON
ስ
: 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 PBA 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.
4-3 Appropriate Measures for Different Symptom (cont.)