Samsung AVXCSH023/032/040CE, Service Manual

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Troubleshooting
Samsung Electronics 4-93
4-3-58 Breakdown of an EEV closure(1
st
)
1. How to diagnose
1) During cooling operation (It must satisfy each of the following conditions for over 20minutes.)
2) During heating operation (must satisfy each of conditions below)
2) • When more than 2 indoor units are on Thermo On heating operation.
2) • When average high pressure is over 1.77MPa
2) • 5 minutes after finishing Safety Start
2) • Keep Indoor units’ T(Eva_In)<T(Room) +37.4˚F/3˚C and T(Eva_Out)<T(Room) +37.4˚F/3˚C condition for more than five minutes
2. How to check
1) Check if the wire of an electronic expansion valve is correctly connected to the PCB of indoor unit.
2) Check if the coil of an electronic expansion valve is correctly plugged into the main body.
3) Check if there is any rust on the surface of the coil of an electronic expansion valve with the naked eye, and 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.
2) - In case of closure problem, operate the indoor unit in which the error has occurred.
2) - 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.
2) - As an electronic expansion valve replacement is tricky work that requires collecting refrigerant in all systems, please make sure
to check the above items before replacement.
Tcond, out - Tair, out > 37.4°F/3°C OK
Tair, in - Teva, out > 39.2°F/4°C NO
Tair, in - Teva, out > 39.2°F/4°C NO
Compressor in operation &
Indoor unit operation & Thermo On
OK
Error details EEV closure breakdown