Comp. Down Due To Low Pressure Sensor Protection (E410) - Samsung AC024BXUPCH Service Manual

4-2-9. Comp. down due to low pressure sensor protection (E410)

Outdoor unit display
Judgment Method
Cause of problem
1. Cause of problem
Are all service valves open?
estimated value and theManifold Gauge
Are the indoor unit TXV normally operation
Are there any blockage inside
Indoor fan operating normaly for the cooling?
to the intake of the indoor unit?
Check the refrigerant amount
Samsung Electronics
( Air Cooled )
• Less than 14.2psi(1kg/cm2) for 3 minutes after 5 minutes after cooling mode compressor on
• Less than 42.7psi(3kg/cm2) for 3 minutes after 10 minutes after cooling mode compressor on
<Cooling Operation>
• Indoor unit fan motor problem (constrained, defective)
• Indoor unit heat exchanger is contaminated
• Service valve locked
• Obstruction of indoor unit air intake
Cooling test mode
Yes
Is the S-net
value in range?
Yes
Yes
the pipe? (filter etc.)
No
Yes
Is there any obstruction
No
Connect S-net and Manifold Gauge.
(essential requirement)
No
Open the Service Valve
No
Replace pressure sensor
No
Check the relevant TXV
Yes
Pipe inspection
No
Replace relevant component
(motor or fan)
Yes
Eliminate suction obstructions
Troubleshooting
4-15