Troubleshooting
82
Samsung Electronics
4-4-34 Setup Error for MCU Branch part – Setup Error for MCU Quantity Used
1. Inspection Method : Re-check the MCU quantity setup switch from the outdoor unit.
Check for overlaps in each MCU address setup switch.
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.
MCU BOX #0
MCU PCB
OFF
MCU Address Setup
ON
Indoor Unit Address
Setup for Using
Branch Sphere
4
4
2
1
5
6
0
Branch Sphere A
4
B
C
D
E
1
F
6
MCU BOX #0
Outdoor Unit
PCB
MCU PCB
OFF
MCU Address Setup
MCU Address
Setup
Setup for Indoor
Quantity Used
MCU Address
Setup
Setup for Indoor
Quantity Used
ON
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor Unit Address
Setup for Using
Branch Sphere
4
4
2
1
5
5
1
6
0
Branch Sphere A
4
B
C
D
E
5
F
6
MCU BOX #1
MCU PCB
OFF
ON
1
3
7
9
0
0
1
Branch Sphere A B
D
E
0
7
F
1
MCU BOX #0
Outdoor Unit
PCB
MCU PCB
OFF
MCU Address Setup
ON
Indoor Unit Address
Setup for Using
Branch Sphere
4
4
2
1
5
5
1
6
0
Branch Sphere A
4
B
C
D
E
5
F
6
MCU BOX #1
MCU PCB
OFF
ON
1
3
7
9
0
0
1
Branch Sphere A B
D
E
0
7
F
2
C
C
Outdoor unit display
Indoor unit display
Operation
Timer
Criteria
• Occurs when the quantity of MCU is incorrectly set by the outdoor unit.
• Occurs when same addresses are found when two or more MCU are connected.
Cause of problem
• Outdoor unit MCU setup and same address errors when connecting two or more MCUs .
