Samsung AM072/096/120/144FXVAFH Service Manual page 175

Troubleshooting
: Suspension of starting due to Compressor discharge temperature sensor / Top temperature sensor
✳✳
AM038/048/055KXWD
Outdoor unit display
Operation Defrost
Indoorunit display
※ ● : ON ◑ : Flash × : OFF
∙ When value of compressor discharge temperature sensor / Top temperature sensor is checked at 120
Judgment Method
∙ Refrigerant shortage.
∙ EEV is blocked.
∙ Service valve is blocked.
Cause of problem ∙ Discharge temperature sensor is defective.
∙ TOP temperature sensor is defective.
∙ Pipe and filter is blocked
∙ Leakage of compressor discharge check valve of stopped side outdoor unit
1. How to check
Is the resistance value normal for the
compressor discharge temperature sensor /
Top temperature sensor?
Are all service valves open?
Are the indoor unit and outdoor unit EEV
normally operating?
Are there any blockage inside the
Check the refrigerant amount
4-78
Duct, Cassette (1/2 Way),Console, Celing
Timer Fan Filter/MPI Operation Defrost
× × ◑ ◑ ◑
(Refer to E251)
Yes
Trial Operation
Yes
Yes
pipe? (filter etc.)
No
Cassette (4/Mini4 Way)
Timer Filter 18℃
× ◑ ◑ ◑ ×
No
Replace compressor discharge temperature
sensor / Top temperature sensor
Connect S-net and Manifold Gauge.
(essential requirement)
No
Open the service valve
No
Check the relevant EEV
Yes
(cont.)
Wall-mounted (NeoForte)
21℃ Turbo 24℃ 27℃
× ◑ ◑ ◑
or more.
℃
Pipe inspection
Samsung Electronics