Setup Error For Mcu Branch Part-Setup Error For Mcu Quantity Used - Samsung AM080xXV Series Service Manual

Troubleshooting
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 Filter/MPI Operation Defrost Timer Filter Operation Timer Turbo 24℃
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.
Special Cause • Outdoor unit MCU setup and same address errors when connecting two or more MCUs .
1. Inspection Method : Check the Main PCB MCU quantity setting switch of the outdoor unit and check the installed MCU quantity
matches.
Check whether each MCU PCB 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) PCB 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
4-32
× ◑ ◑ ×
Outdoor Unit PCB
Quantity of
Quantity of
Indoor Unit
MCU
Indoor Unit: - MCU: 2
Outdoor Unit PCB
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)
× ×
◑ ◑
Samsung Electronics
27℃
×