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:
- Supply air sensor is not connected to the controller (only for F11/F12 faults),
- Return water temperature sensor is not connected to the controller (only for F19/F20 faults),
- Sensor failure,
- Damaged wiring,
- Main controller failure.
Troubleshooting
| Pic 1. External C6 controller connection (supply air temperature sensor) | Pic 2. Temperature sensor characteristics |
| Pic 4. External C6 controller connection (return water temperature sensor) | Pic 4. Temperature sensor characteristics |
5 pav. Temperatūrinio jutiklio charakteristika
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