Troubleshooting
Samsung Electronics 4-61
4-4-18 Simultaneous opening of Cooling/heating MCU SOL Valves 1
st
/2
nd
● During the first detection, as the system restarts after making an automatic stop to check a problem with the system
● During the second detection, please refer to the following check-up methods.
1. How to check
Yes
Are an indoor unit address,
cooling/heating position of the
MCU SOL VALVE connector correctly
connected?
Check the indoor unit address,
cooling/heating position and make
the correct connection.
Yes
No
Yes
Replace MCU SOL VALVE BODY
Is a coil of MCU SOL VALVE
Correctly connected?
Check the coil connection
and fasten it again
No
When you restart it
after replacing MCU SOL VALVE coils, does the
same error occur again?
Replace coils as they are defective.
No
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