Samsung AM072FXVAFH series - Compressor Discharge or Top Temperature Sensor Breakaway Error

Troubleshooting
Samsung Electronics 4-55
4-4-21 Compressor Discharge or Top temperature sensor breakaway error
Outdoor unit display
(Compressor 1 Discharge) (Compressor 2 Discharge)
(Compressor 1 Top) (Compressor 2 Top)
Indoorunit display
Judgment Method
1) Faulty compressor frequency of 60Hz or higher.
2) Suction temperature > Low pressure saturation temperature +10 ℃
3) Relevant discharge or Top temperature < High pressure saturation temperature
4) In case of
keep 30 minutes in state that satisfy all above conditions (1,2&3) for 30min.
Cause of problem
 Compressor discharge or Top temperature sensor breakaway and defective / Ineffective start of compressor
Duct, Cassette (1/2 Way),Console, Celing Cassette (4/Mini4 Way) Wall-mounted (NeoForte)
Operation
Defrost TimerFan Filter/MPI
Operation
Defrost Timer Filter
Operation
TimerTurbo
24℃ 27℃
××◑◑◑
×
◑◑◑× ×◑◑◑
※ ● : ON ◑ : Flash ×: OFF
1.
Cause of problem
Replace the PCB
Re-insert sensor Re-attach sensor holder
No
Yes
Is the Discharge
or Top temperature sensor and the sensor holder
correctly attached?
Defective sensor : Replace sensor
No
Yes
Is the Discharge or Top temperature
sensor resistance value reasonable?
(Refer to the “Note 1”)
NOTE1
TOP1 : CN43 (3, 4)
TOP2 : CN45 (5, 6)
DIS1 : CN43 (1, 2)
DIS2 : CN45 (3, 4)
Resistance value
measure part
Resistance value
measure part
TOP1 TOP2
Temperature(°C) Resistance(K)
130
120
100
80
60
25
20
10
0
8.9
11.2
18.5
32.0
59.0
200.0
242.0
362.0
553.0