Troubleshooting
4-68 Samsung Electronics
4-4-34 MCU branch part setup error – Set as being used without connection to an Indoor unit
1. How to check
A
djust the Dip switch that sets up the use of MCU branch part to ‘Not-Used'. After completing resetting, press the outdoor unit's
K3 button to reset or turn off to restart.
• Pipe is not installed to the indoor unit with assigned address on MCU
Criteria
Cause of problem
• Occurs when MCU PIPE is set as being used, yet not connected to an indoor unit
Outdoor unit display
Indoor unit display
MCU BOX #1
MCU PCB
OFF
ON
1 3 7 9 0 0
1
Branch A
B C D E
0
F
×(Operation)
◑
(Timer)
◑
(Fan)
◑
(Filter)
×
(Defrost)
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