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

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Troubleshooting
4-72 Samsung Electronics
4-4-31 : Comp. Down due to High Pressure Protection Control
1. How to check
Is the S-net
estimated value and theManifold
Gauge value in range?
Are the Indoor Unit
and Outdoor Unit EEV normally
operating?
Are there any blockage inside
the pipe? (filter etc.)
Check the refrigerant amount.
Are the Outdoor Fan
operating normally for the cooling
and the Indoor Fan operating normally
for the heating?
Auto Trial Operation
Open the Service Valve
Replace High Pressure sensor
Check the relevant EEV
Pipe inspection
Replace relevant component
(motor or fan)
Yes
Yes
Yes
No
Yes
Are all service valves open?
Connect S-net and Manifold Gauge.
(essential requirement)
No
No
No
Yes
No
Outdoor unit display
( Air Cooled )
Indoorunit display
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation Defrost Timer Fan Filter/MPI Operation Defrost Timer Filter Operation Timer Turbo
× × ◑ ◑ ◑ × ◑ ◑ ◑ ● ◑ ◑
※ ● :
ON
◑ :
Flash
× :
OFF
Judgment Method
∙ Value of the high pressure sensor is detected at 41kg/cm² or more
Cause of problem
<Cooling Operation>
∙ Outdoor unit fan motor problem (constrained, defective)
∙ Outdoor heat exchanger is contaminated.
∙ Service valve locked/Fill refrigerant
<Heating Operation>
∙ Service valve locked/Excessive refrigerant