Problem With Eev Closure (2 Nd ) - Samsung AVXCSH023/032/040CE Service Manual

4-4-8 : Problem with EEV closure (2
1. How to diagnose
1) During Cooling operation(Each of the below conditions have to be met for at least 20 minutes.)
Tcond, out - Tair, out > 3°C
Tair, in - Teva, out > 4°C
Tair, in - Teva, out > 4°C
Compressor in operation &
Indoor unit operation & Thermo On
Error details
2) During heating operation (must satisfy all conditions below)
2) • When more than 2 indoor units are on Thermo On heating operation.
2) • When average high pressure is over 18kg/cm
2) • 5 minutes after finishing Safety Start
2) • Keep Indoor units' T(Eva_In)<T(Room) +3°C and T(Eva_Out)<T(Room) +3°C condition for more than 5 minutes
2. How to check
1) Check if the wire of electronic expansion valve is correctly connected to the PCB of indoor unit.
2) Check if the coil of electronic expansion valve is correctly plugged into the main body.
3) Check if there is any rust on the surface of the electronic expansion valve with naked eye then check the resistance between each
terminal to find any wire breaking or short circuit.
4) Press the RESET KEY (K3) of the outdoor unit then see if the same error occurs.
4) - In case of closure problem, operate the indoor unit in which the error has occurred.
4) - In case of opening problem, please do not operate the indoor unit in which the error has occurred.
5) If there is no problem with the above checkup items, replace the electronic expansion valve of the troubled indoor unit.
4)- As electronic expansion valve replacement is tricky work that requires collecting refrigerants in all systems, please check the
above items before replacement.
Samsung Electronics
)
nd
OK
NO
OK
OK
Electrically operated valve closure breakdown
2
Troubleshooting
4-104