Samsung Electronics
94
Troubleshooting
4-3-14
MCU branch part setup error – Connect an Indoor unit to a branch part not being used
1. How to check
Check the actual use of the branch part. If it is used, turn on the Dip switch for branch part setup.
After completing resetting, press the outdoor unit's K3 button to reset or turn off to restart.
MCU BOX #0
MCU PCB
OFF
MCU
address setup
ON
Indoor unit address
Branch part use setup
4
2
2
0
5
6
0
Branch A
B
C
D
E
F
MCU BOX #1
MCU PCB
OFF
MCU
address setup
ON
Indoor unit address
Branch part use setup
4
0
1
2
5
7
1
Branch A
B
C
D
E
F
MCU BOX #1
MCU PCB
OFF
ON
1
3
7
9
0
0
1
Branch A
B
C
D
E
0
F
MCU BOX #1
MCU PCB
OFF
MCU address setup
ON
Indoor unit
Indoor unit address
Branch part use setup
4
4
2
1
5
6
0
Branch A
4
B
C
D
E
5
F
6
2
Outdoor unit
display
Indoorunit
display
Duct, Cassette (1/2 Way),Console, Celing
Cassette (4/Mini4 Way)
Wall-mounted (NeoForte)
Operation Defrost Timer Fan Filter/
MPI Operation Defrost Timer Filter Operation Timer Turbo 24
℃
27
℃
×
×
◑
◑
×
×
◑
◑
×
×
×
◑
◑
×
※ ●
: ON
◑
: Flash ×: OFF
Judgment
Method
• Occurs when MCU PIPE is turned off, yet an indoor unit is registered
Cause of
problem
• Indoor unit connection to the unused branch part
4-3 Appropriate Measures for Different Symptom (cont.)
