Fehlercodes: F07_F24_F26_ECOi_MF1

Alarm Code F07, F24, F26
Alarm meaning Liquid temperature sensor trouble at outdoor heat exchanger 1; Liquid temperature sensor trouble at outdoor heat exchanger 2; Liquid temperature sensor trouble at outdoor heat exchanger 3
Alarm conditions
  1. A/D step is 10 steps or less (short circuit).
  2. A/D step is 1014 steps or more (open circuit).
Probable cause
  1. Sensor malfunction (including connector)
  2. PCB malfunction
Check
  1. Measure the sensor resistance. Check that the sensor is operating normally.
  2. Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer.
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