How to check alarm list in units with C6.1 control panel.
Below you can find alarm list:
| Code | Alarm text | Comment | Troubleshooting tips | ||
|---|---|---|---|---|---|
| Text | Hex | ||||
| F1 | Low supply airflow |
Supply airflow not reached in CAV mode |
1. Fan failure, 2. Damaged/wrong wiring, 3. Clogged filters, 4. Incorrect sensor mounting in the duct, |
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| F2 | Low extract airflow | Extract airflow not reached in CAV mode |
1. Fan failure, 2. Damaged/wrong wiring, 3. Clogged filters, 4. Incorrect sensor mounting in the duct, |
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| F3 | Return water temperature too low | Return water temperature < 8 oC |
Damaged sensor wiring, faulty sensor, |
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| F4 | Low supply air temperature | Supply air temperature below +5 oC |
Faulty sensor, faulty heating system/control, |
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| F5 | High supply air temperature | Supply air temperature higher than 45 oC (for 10 min) |
Faulty sensor, faulty heating system/control, |
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| F6 | Electric heater overheat | Activated eletrical heater protection relay (TK100) |
Reset relay by pressing "RESET" button. |
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| F7 | Heat exchanger failure | Rotory/plate heat exchanger efficiency dropped below critical value |
1. Rotor not working 2. In CF units, bypass damper not working correctly 3. Faulty sensors 4. Air mixing between section causing low efficiency |
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| F8 | Heat exchanger freezing |
Only occurs in winter conditions. 1. Rotor efficiency dropped below critical value 2. Pressure drop through plate heat exchanger increased above critical value |
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| F9 | Internal fire | Supply air temperature higher than 70 oC OR extract air temperature higher than 50 oC. |
Faulty sensor, faulty heating system/control |
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| F10 | External fire | Signal recieved from external fire system |
C6 controller board connections 25-26 |
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| F11 | Sensor failure | Short circuit in supply air temperature circuit (B1) |
Wrong/damaged wiring, faulty sensor |
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| F12 | Open circuit in supply air temperature circuit (B1) | ||||
| F13 | Sensor failure | Short circuit in extract air temperature circuit (B2) |
Wrong/damaged wiring, faulty sensor |
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| F14 | Open circuit in extract air temperature circuit (B2) | ||||
| F15 | Sensor failure | Short circuit in outdoor air temperature circuit (B3) |
Wrong/damaged wiring, faulty sensor |
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| F16 | Open circuit in outdoor air temperature circuit (B3) | ||||
| F17 | Sensor failure | Short circuit in exhaust air temperature circuit (B4) |
Wrong/damaged wiring, faulty sensor |
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| F18 | Open circuit in exhaust air temperature circuit (B4) | ||||
| F19 | Sensor failure | Short circuit in return water temperature circuit (B5) |
Wrong/damaged wiring, faulty sensor |
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| F20 | Open circuit in return water temperature circuit (B5) | ||||
| F21 | Sensor failure | Short circuit in supply after heat exchanger air temperature circuit (B14) |
Wrong/damaged wiring, faulty sensor |
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| F22 | Open circuit in supply after heat exchanger air temperature circuit (B14) | ||||
| F23 | Controller failure | Flash fail | Controller failure | ||
| F24 | Too low 24V supply voltage | Controller failure | |||
| F25 | Too high 24V supply voltage | Controller failure | |||
| F26 | 24V Supply Voltage Overloaded | Controller failure | |||
| F28 | Sensor failure | Room temperature sensor failure |
Wrong/damaged wiring, faulty sensor, wrong configuration |
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| F29 | Sensor failure | Room humidity sensor failure, plate exchanger defrost |
Wrong/damaged wiring, faulty sensor, wrong configuration |
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| F30 | Sensor failure | Humidity Sensor failure (dehumidification control) |
Wrong/damaged wiring, faulty sensor, wrong configuration Alarm shows up when humidity sensor AND humidity control function is activated but no humidity signal is received. |
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| F31 | Sensor failure | Impurity sensor failure |
Wrong/damaged wiring, faulty sensor, wrong configuration Alarm shows up when impurity sensor AND impurity control function is activated but no impurity signal is received. |
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| W1 | Clogged filters | Change filters and reset filter impurity level | |||
| W2 | Service mode | Message appears when modifications are made in service level. Reset alarms to delete | |||
| W3 | Low return water temperature | ||||
| W4 | Sensor failure | Humidity Sensor Failure |
Wrong/damaged wiring, faulty sensor bad configuration. No signal received from sensor to controller Alarm shows up when humidity sensor is activated AND no humidity control function is activated |
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| W5 | Sensor failure | Impurity sensor failure |
Wrong/damaged wiring, faulty sensor, bad configuration. No signal received from sensor to controller Alarm shows up when impurity sensor is activated AND no impurity signal is received. |
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| W6 | Heat exchanger failure | Low heat exchanger efficiency | No communication with rotor motor control board | ||