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F11-F22 Temperature sensor failure

Alarm conditions:

F11 - Short circuit in supply air temperature circuit.

F12 - Open circuit in supply air temperature circuit,

F13 - Short circuit in extract air temperature circuit.

F14 - Open circuit in extract air temperature circuit,

F15 - Short circuit in outdoor air temperature circuit.

F16 - Open circuit in outdoor air temperature circuit,

F17 - Short circuit in exhaust air temperature circuit.

F18 - Open circuit in exhaust air temperature circuit,

F19 - Short circuit in return water temperature circuit.

F20 - Open circuit in return water temperature circuit,

F21 - Short circuit in after heat exchanger air temperature circuit.

F22 - Open circuit in after heat exchanger air temperature circuit,

Possible causes:

  1. Supply air sensor is not connected to the controller (only for F11/F12 faults),
  2. Return water temperature sensor is not connected to the controller (only for F19/F20 faults),
  3. Sensor failure,
  4. Damaged wiring,
  5. Main controller failure.

Troubleshooting

F11/F12

 


Pic 1. External C6 controller connection (supply air temperature sensor) Pic 2.  Temperature sensor characteristics

F19/F20

Pic 4. External C6 controller connection (return water temperature sensor) Pic 4.  Temperature sensor characteristics

 

F13-F22

 

5 pav. Temperatūrinio jutiklio charakteristika

 

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