Indoor Heat Exchanger's Eva Out Sensor Dislocation Error (Open/Short) - Samsung AM032MNQDCH/AA Service Manual

4-4-7 Indoor Heat Exchanger's EVA OUT sensor dislocation error (Open/Short)

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