Alarms
Compact
Alarm list
The following list applies to Compact ventilation units with the CTS602 control. The events are divided into the following categories:
WARNING: The operation will go ahead, but an incident has occurred that you should be aware of.
Alarm: All or part of the operation is stopped because it is a critical fault requiring immediate attention.
| ID | Type | Display text | Description/cause | Troubleshooting | 1 |
|
Hardware error | Operating system hardware error. | Note the alarm and reset it. If the alarm does not disappear, contact your installer. |
|---|---|---|---|---|
| 2 |
|
Time-out alarm | A warning alarm has become a critical alarm. | Note the alarm and reset it. If the alarm does not disappear, contact your installer. |
| 3 |
|
Fire alarm activated | The ventilation unit stopped because the fire thermostat was activated. |
If there is no fire, check the connection to the fire thermostat. If this is OK, contact your installer. |
| 4 |
|
Pressure switch |
The high-pressure switch in the cooling circuit has activated, possibly due to...: - Extremely warm supply of outside air - Clogged filter - Broken fan |
Check for faults and reset the alarm. Contact your installer if you cannot reset the alarm or if the alarm occurs frequently. |
| 6 |
|
Heat pump defrosting error | The defrost time has been exceeded. The exchanger or heat pump has not defrosted within the maximum time. This may be due to exposure of the unit to very low outdoor temperatures. | Contact your installer if resetting the alarm does not help. Record the current operating temperatures in the "Show data" menu to facilitate the maintenance process. |
| 10 |
|
Overheating of electric post-heating | The electric heating element is overheated. Lack of airflow due to, for example, clogged filters, blocked air intake or faulty supply air fan. |
Make sure air is blown into the house. Make sure the filters are clean. Check that the outside air inlet is not blocked. Reset the alarm. Contact your installer if the above does not solve the problem. |
| 11 |
|
Low current across the electric heating element | Lack of airflow in the air supply. | See alarm code 10. |
| 13 |
|
High-temperature electricity supplementary heating HW. | The temperature for power supply in the hot water tank has been too high. | The overheating fuse behind the lower door should be switched on again. In case of repeated alarms, contact your installer. |
| 15 |
|
The room temperature is too low | When the room temperature is below 10°C, the unit will stop to prevent further cooling of the house. This can happen, for example, during a period when the house is not occupied and the heating is switched off. | Heat the house and reset the alarm. |
| 16 |
|
Software error | Fault in the ventilation device software | Contact your installer. |
| 17 |
|
Watchdog warning | Fault in the ventilation device software | Contact your installer. |
| 18 |
|
Database content changed |
Parts of the programme have been lost.
This may be due to a prolonged power failure or a lightning strike. The device continues to operate with the default settings. |
Reset the alarm. Contact your installer if the device does not work satisfactorily, as before, as some subprogrammes may have been lost. (The subprogramme is only available for service). |
| 19 |
|
Change filter | The filter monitor is set to X number of days for checking/replacing the filter. |
Clean/replace filter. Reset the alarm. |
| 20 |
|
Errors in legionella treatment | Legionella treatment was not carried out within the timeframe or number of tests. | In case of repeated alarms, contact your installer. |
| 21 |
|
Check date and time | Displayed during power cuts. |
Set the date and time. Reset the alarm. |
| 22 |
|
Supply air temperature error | The desired heating of the supply air is not possible. (applies only with reheating element) |
Set a lower air supply temperature. Reset the alarm. |
| 23 |
|
Domestic hot water temperature error | Heating hot water is not possible. | Contact your installer. |
| 27-58 |
|
Fault on temperature sensor | One of the temperature sensors is short-circuited, disconnected or faulty. | Register which sensor, (Tx) defective and contact your installer. |
| 70 |
|
Anode error | The hot water tank anode is cracked or not connected properly. | The hot water tank anode is cracked or not connected properly. |
| 71 |
|
Error defrosting heat exchanger |
Max defrost time exceeded for counterflow heat exchanger. This may be due to exposure to very low temperatures. |
If resetting the alarm does not help, contact your installer. Record the current operating temperatures in the "SHOW DATA" menu to facilitate the service process. |
| 72 |
|
Abnormally low evaporation temperature | Abnormal evaporator temperature (T6) is due to insufficient airflow. |
Replace filters, check that outside air intake is not obstructed. In case of constant malfunction contact your installer. |
| 73 |
|
High-pressure alarm | The airflow over the surfaces is too low |
Make sure air is blown into the house. Make sure the filters are clean. Check that the outside air inlet is not blocked. Reset the alarm. Contact your installer if the above does not solve the problem. |
| 74 |
|
Low pressure alarm | Airflow over surfaces in cooling mode is too low. |
Make sure air is blown into the house. Make sure the filters are clean. Check that the outside air inlet is not blocked. Reset the alarm. Contact your installer if the above does not solve the problem. |
| 91 |
|
Missing expansion board | Expansion PCB missing. | Contact your installer. |
| 92 |
|
Backup error | Error writing or reading installation settings | Contact your installer. |
| 96 |
|
Error in damper test | Valve (open / close) not fulfilled. |
Reset the alarm. If that does not help, contact your installer. |
| 102 |
|
Manual | Displayed while testing functions in manual test. | The warning disappears when the "Manual test" function is switched off. |