Indoor Unit And Mcu Address Duplication Error - Samsung AM072BXV Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-56

Indoor unit and MCU address duplication error

Outdoor unit display
Indoor unit display
※
Judgment Method Refer to the judgment method below.
Cause of problem
• Indoor unit and MCU address duplication.
1. Cause of problem
After completely tracking the outdoor unit,
check the occurrence of E108.
Has E108 occurred?
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.
E108 occurring machine
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.
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.
Samsung Electronics
- A00X (X : Address of duplicate indoor unit)
Operation Defrost
× ×
● : ON ◑ : Flash ×: OFF
Yes
Indoor unit
Timer
◑
No
End
MCU
the installed MCU to check any duplicate address.
※ Check the manual address view in the view mode.
(Press K4 Switch long to enter)
※ 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
system must be reset.
Fan Filter/EMI
◑
Check the rotary switch of the address of
×
the whole
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