Mcu Branch Part Setup Error-Connect More Indoor Units Than What Is Actually Set Up In Mcu - Samsung AM080FX A Series Service Manual

Troubleshooting
4-3 Appropriate Measures for Different Symptom (cont.)
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 Timer Fan
Indoorunit
display
×
※ ●: ON ◑: Flash ×: OFF
Judgment
• Occurs when the number of indoor unit installed exceeds that setting in MCU
Method
Cause of
• Number of indoor units exceeds number of indoor units entered on MCU setting
problem
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.
Example 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 PBA
Quantity of
Indoor
Indoor Unit: 4
Samsung Electronics
Filter/
Operation Defrost Timer Filter Operation Timer Turbo 24℃
MPI
× ◑ ◑ ×
Quantity of
MCU
MCU: 1
Cassette (4/Mini4 Way)
× ◑ ◑ ×
Branch
Wall-mounted (NeoForte)
× × ◑ ◑
27℃
×
170