E407 : Comp. Down Due To High Pressure Protection Control - Samsung AM072/096/120/144FXVAFH Service Manual

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