Samsung Electronics 312
Test Operation
5) Ball valve (service valve)
What to inspect: Status of the outdoor unit's ball valve (service valve)
Error code: E503 ("NG" is indicated in the result report)
operation.
■ Precautions
- If an error occurs, Auto Trial Operation stops immediately.
- When inspecting the ball valve, inspect the liquid line, gas line, and high pressure line (HR only) together.
A. Abnormal noise during compressor operation
B. Increase in the suction temperature
- Symptoms in the event of an issue on the Main EEV
A. It is not possible to control the superheat (SH)
B. It is not possible to secure a DSH of higher than 20K
C. See the troubleshooting instructions on NG items related to the Main EEV
- If any abnormality occurs on the pressure sensor, see the troubleshooting instructions on NG items related to the pressure sensor
- If there frost has formed on the outdoor heat exchanger, perform Trial Operation or forced defrost operation to eliminate the frost, and
then perform Auto Trial Operation again.
Take corrective measures.
Take corrective measures.
Take corrective measures.
Take corrective measures.
Is the ball valve
on the outdoor unit opened?
Has the correct
amount of additional refrigerant been injected
into the indoor unit and liquid
line?
Is the operation cycle normal?
Main EEV and pressure sensors operating
properly?
Perform Trial Operation (cooling/heating)
- See the instructions on Key operation modes.
Perform Auto Trial Operation again.
Yes
No
No
No
No
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)
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