Top Temperature Sensor - Samsung AM072/096/120/144FXVAFH Service Manual

4-4-33 : Suspension of starting due to Compressor discharge temperature sensor / Top temperature sensor
Outdoor unit display
Operation Defrost
Indoorunit display
※ ● : ON ◑ : Flash × : OFF
Judgment Method ∙ When value of Compressor discharge temperature sensor / Top temperature sensor is checked at 120
∙ Refrigerant shortage.
∙ Electronic expansion valve is blocked.
∙ Service valve blocked.
Cause of problem
∙ Defective discharge temperature sensor.
∙ TOP temperature sensor defective.
∙ Blocked pipe and defective.
∙ Discharge check valve leaking on outdoor unit that is off.
1. How to check
Is the resistance
value normal for the
Compressor discharge Temperature sensor/

Top temperature sensor?

(Refer to "NOTE 1")
Auto Trial Operation
Are all service valves open?
Are the Indoor Unit
and Outdoor Unit EEV normally
any blockage inside the pipe?
Check the refrigerant amount.
Samsung Electronics
Duct, Cassette (1/2 Way),Console, Celing
Timer Fan Filter/MPI Operation Defrost
× × ◑ ◑ ◑
Yes
Yes
operating?
Yes
Are there
(filter etc.)
No
TOP1 : CN43 (3, 4)
TOP2 : CN45 (5, 6)
DIS1 : CN43 (1, 2)
DIS2 : CN45 (3, 4)
Cassette (4/Mini4 Way)
Timer Filter
× ◑ ◑ ◑
No
Replace Compressor discharge temperat
-ure sensor / Top temperature sensor
Connect S-net and Manifold Gauge.
(essential requirement)
No
Open the Service Valve
No
Check the relevant EEV
Yes
NOTE1
Resistance value
Resistance value
measure part
measure part
TOP1 TOP2
Troubleshooting
Wall-mounted (NeoForte)
Operation Timer Turbo
● ◑ ◑
or more.
Pipe inspection
Temperature(°C) Resistance(KΩ)
130 8.9
120 11.2
100 18.5
80 32.0
60 59.0
25 200.0
20 242.0
10 362.0
0 553.0
4-77