Test Operation
9-8 Samsung Electronics
5) Service Valve
Ŷ Inspection item : Outdoor Unit Service Valve is open / closed
Ŷ Error code: E503 (The resulting report "Undetermined")
Ŷ Determine the status of the Service Valve open / closed of the each Outdoor Unit.
Ŷ If the judgment of Outdoor Unit Service Valve is "Undetermined" : Checking in accordance with the following order.
[Caution]
- If the judgment of Service Valve "Undetermined" : Display the error to corresponding Outdoor Unit and then Auto Trial Operation is exited. (Stop
the overall system)
- If inspect service valve : Check the Liquid pipe and Gas pipe, Service Valve.
- If the frost formation of Outdoor Heat exchanger, continue Trial Operation until defrost operation begins.
And then complete after add more than 1 hour operation after end of defrost operation.
(Execute checking of 4Way Valve and Main EEV together.)
- 4Way Valve abnormal symptoms
1) Strange noise of compressor to operate.
2) Indoor unit EVA In/Out maintain the temperature below zero (Less than -0°C )
3) 4Way Valve : Refer to the Service Manual.
- Main EEV abnormal symptoms
1) When closed Main EEV opening : Compressor suction degree of overheat impossible to ensure and less than DSH 20K.
2) When opened Main EEV opening : Compressor suction degree of overheat is high status.
3) Main EEV : Refer to the Service Manual.
- Pressure sensor abnormal symptoms : Refer to the Service Manual.
Yes
Service Valve opening
No
Is Service Valve open state?
Yes
Check the 4Way Valve,
Main EEV, Pressure sensor.
No
Is 4Way Valve,
Main EEV, Pressure sensor normal?
Yes
Adjusts the refrigerant
(Addition / Emitted)
No
Is refrigerant in the system properly?
Complete
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