Samsung Electronics 170
Troubleshooting
4-3-15 MCU branch part setup error – Connect more Indoor units than what is actually set up in MCU
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
Quantity of
MCU
Indoor Unit: 4 MCU: 1
Branch
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 the number of indoor unit installed exceeds that setting in MCU
Cause of
problem
• Number of indoor units exceeds number of indoor units entered on MCU setting
4-3 Appropriate Measures for Different Symptom (cont.)
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