Samsung AM072/096/120/144FXVAFH, Service Manual

Page: 286 / 295

Test Operation
Samsung Electronics 9-7
4) Pressure sensor (Independent installation)
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Inspection item : High/Low Pressure sensor of the independent installed Outdoor Unit.
Ŷ
Error code: None (The resulting report "Undetermined")
Ŷ
Determine the status of the Pressure sensor of the independent installed Outdoor Unit before the compressor start.
Ŷ
If the judgment of Outdoor Unit Pressure sensor is "Undetermined" : Checking in accordance with the following order.
[Caution]
- If the Outdoor Unit with a history of operation (Auto Trial Operation inclusion) : Maintain the vacuum mode for more than 5 minutes.
Yes
Confirmation and Measures
No
Is Pressure sensor connector properly connect?
Yes
Replace Hub PCB
No
Is voltage 5 V between
3, 4 pin of PCB Pressure sensor terminal?
Yes
Replace PCB
No
Is deviation of outdoor
unit as following?"High pressure Max
/Min deviation : less than 2"
Off the vacuum mode of Outdoor Unit
Check the pressure sensor breakdown
Complete
V acuum mode of Outdoor Unit
※
Check the Pressure sensor breakdown after the saturation pressure
of the outdoor temperature or connect the manifold gauge to check the pressure .