Samsung AM015NNNDEH Series - Indoor Heat Exchangers EVA out Sensor Dislocation Error (Open;Short)

Troubleshooting
56
Samsung Electronics
4-4-7 Indoor Heat Exchanger's EVA OUT sensor dislocation error (Open/Short)
1. How to diagnose
1) During Cooling Operation 2) During Heating operation
Tcond, out - Tair, out > 3°C OK
Tair, in - Teva, out > 4°C NO
Tair, in - Teva, out > 4°C OK
Compressor in operation &
Indoor Unit operation &
Thermo On
OK
Error details
Breakaway Error of Indoor Heat
Exchanger EVA Out sensor
Average high pressure > 25kg/cm² OK
Average low pressure > 8.5kg/
cm² OK
Tcond, out - Tair, out ≥ 3°C OK
Tair, in - Teva, out ≥ 2°C NO
Tcond, out - Tair, out < -2°C OK
Compressor in operation & Indoor
Unit operation & Thermo On
OK
Error details
Breakaway Error of Indoor Heat
Exchanger EVA Out sensor
2. How to check
* Hydro Unit : Before and after the Compressor operation, EVA Out tem-
perature difference is less than 3°C.
Restart operation after connecting
the connector to the PCB.
After separating the Indoor EVA Out sensor
connector from the PCB, measure the
resistance value between the two terminals.
Yes
No
70
60
50
40
30
20
10
0
-10
2.2
3.0
4.2
5.8
8.3
12.1
18.0
27.3
43.0
Did the Indoor EVA Out sensor
connector breakaway from the PCB?
Yes
No
Did the resistance value
significantly stray from the following temperature
table?
Restart operation after replace the PCB.
Replace this part as it is
the defective of the
Indoor EVA Out sensor itself.
Temperature(℃)
Resistance(KΩ)
Outdoor unit display
x x x
(
x x x
:
The address of the error occurred indoor unit)
Indoor unit display
Operation Timer
Criteria
• Refer to the judgment method below.
Cause of problem
• Breakaway of Indoor Heat Exchanger EVA Out sensor