Samsung AVXCSH022EE Service Manual page 166

Troubleshooting
4-5-17 Simultaneous opening of Cooling/heating MCU SOL Valves 1
● 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
Are an indoor unit address,
cooling/heating position of the
MCU SOL VALVE connector correctly
connected?
Is a coil of MCU SOL VALVE
Correctly connected?
When you restart it
after replacing MCU SOL VALVE coils, does the
same error occur again?
Replace MCU SOL VALVE BODY
4-75
No
Yes
No
Yes
No
Yes
/2
st nd
Check the indoor unit address,
cooling/heating position and make
the correct connection.
Check the coil connection
and fasten it again
Replace coils as they are defective.
Samsung Electronics