Setup Error For Mcu Branch Part - Setup Error For Mcu Quantity Used - Samsung AM072BXV Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-11 Setup Error for MCU Branch part – Setup Error for MCU Quantity Used
Outdoor unit
display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost Timer Fan
Indoorunit
display
×
※ ● : ON ◑: Flash ×: OFF
• Occurs when the quantity of MCU is incorrectly set by the outdoor unit.
Judgment
Method • Occurs when same addresses are found when two or more MCU are connected.
Cause of
• Outdoor unit MCU setup and same address errors when connecting two or more MCUs .
problem
1. Inspection Method
Check the Main PBA MCU quantity setting switch of the outdoor unit and check the installed MCU quantity matches. Check whether each
MCU PBA address switch was duplicated.
To use, reset by pressing the K3 button of the outdoor unit after the reset is completed, or reset after turning off the power and then turn it
on again.
• Example of MCU quantity setting error
ex) PBA MCU setting quantity of outdoor unit = 2 / MCU installed Quantity = 3
• Example of MCU address setting error
ex) Two among three of MCU address was set to 0
Samsung Electronics
Filter/
Operation Defrost Timer Filter Operation Timer Turbo 24℃
MPI
× ◑ ◑ ×
Outdoor Unit PBA
Quantity of
Quantity of
Indoor Unit
MCU
Indoor Unit: - MCU: 2
Outdoor Unit PBA
Quantity of Quantity of
Indoor Unit MCU
Indoor Unit:- MCU: 3
Cassette (4/Mini4 Way)
× ◑ ◑ ×
Address: 0
Address: 1
Address: 2
Branch
Branch
Branch
Wall-mounted (NeoForte)
× × ◑ ◑
27℃
×
91