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Clear 9: Outdoor temperature thermistor error
LED
Hydraulic Unit
Outdoor Unit
Green
Red
ÀDVKHV
ÀDVKHV
ÀDVKHV
Probable causes:
Misconnection.
Sensor failure.
Main PCB failure.
Check:
Clear 9:
1. Check the sensor connection :
-
See if the connector has been disconnected.
-
See if the connection is correct.
-
Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C)
-20 -10
-5
0
5
10
15
20
30
40
50
60
70
Resistance (k
)
115 62,3 46,6 35,2 26,9 20,7 16,1 12,6 7,97 5,18 3,45 2,36 1,65
- If the thermistor is faulty, replace it.
OK
3. Check the electronic board voltage:
- Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
- If there is no voltage, replace Main PCB.
OK
THERMISTOR
(COMPRESSOR)
THERMISTOR
(OUTDOOR)
THERMISTOR
(PIPE)
THERMISTOR
(DISCHARGE)
THERMISTOR
(HEAT SINK)
THERMISTOR
(PIPE MID)
THERMISTOR
(EXPANSION)
Maintenance document "1546 - EN"
Outoor unit - excellia (duo)
WOYGxxxLCT_WOYKxxxLCT
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