Download - ESS - Environmental Site Supplies

Troubleshooting
4-3-15 MCU branch part setup error – Connect more Indoor units than what is actually set up in MCU
Outdoor unit display
Duct, Cassette (1/2 Way),Console, Celing
Operation Defrost
Indoor unit display
×
Timer
Fan
◑
◑
×
Cassette (4/Mini4 Way)
Wall-mounted (NeoForte)
Filter/MPI Operation Defrost
Timer
Filter
Operation
Timer
Turbo
24℃
27℃
×
◑
×
×
×
◑
◑
×
×
◑
※ ● : ON ◑ : Flash ×: OFF
tOccurs when the number of indoor unit installed exceeds that setting in MCU
Criteria
Cause of problem
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1. How to check
Check the number of indoor units connected to MCU then readjust the switch for the number of units
After completing resetting, press the outdoor unit's K3 button to reset or turn off to restart.
tExample of MCU indoor unit setting DIP switch error
ex) Indoor unit No.5 was connected to branch part C, but DIP switch No.3 (branch part C) is off.
Outdoor Unit PCB
Quantity of
Indoor
Quantity of
MCU
Indoor Unit: 4
MCU: 1
Branch
4-30
Samsung Electronics