280 - S. FAULT THO-S
Is the sensor for the suction gas
temperature (Tho-S) correctly
connected?
YES
YES
Replace the control board.
Action.
Replace the sensor.
Are the characteristics for the
suction gas sensor OK?
NO
NO
Sensor data can be found on page 14.
281 – SENSOR FAULT LPT
Is the low pressure transmitter
correctly connected?
YES
NO
Replace the low pressure
transmitter.
Has the fault been corrected?
Action.
Check the amount of refrigerant.
Check the refrigerant circuit.
Does the pressure (external
meter) correspond with the value
displayed in the indoor module?
NO
YES
Replace the control board.NO
YES
OK.
59Chapter 6 | TroubleshootingNIBE AMS10
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