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.
| COMPACT P2 | ||||
|---|---|---|---|---|
| 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. |
| GEO | ||||
|---|---|---|---|---|
| ID | Type | Display text | Description/cause | Troubleshooting | 100 |
|
THeatSup Open | T17 Heating supply temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 101 |
|
THeatSup Short | T17 Heating supply temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 102 |
|
THeatRet Open | T16 Return temperature heating connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 103 |
|
THeatRet Short | T16 Heating return temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 104 |
|
TWaterTa Open | T22 Water tank temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 105 |
|
TWaterTa Kort | T22 Water tank temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 106 |
|
Tamboer Open | T20 Ambient temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 107 |
|
Tamboer Short | T20 Ambient temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 108 |
|
Troom Open | T10 Room temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 109 |
|
Cream Short | T10 Room temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 110 |
|
THeatTank Open | T18 Temperature heating tank open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 111 |
|
THeatTank Short | T18 Temperature heating tank short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 112 |
|
TColdSup Open | T13 Cold supply temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 113 |
|
TColdSup Short | T13 Cold supply temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 114 |
|
TColdRet Open | T14 Cold return temperature open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 115 |
|
TColdRet Short | T14 Cold return temperature short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 116 |
|
Tevap Open | T23 Temperature evaporator sensor open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 117 |
|
Tevap Short | T23 Temperature evaporator sensor short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 122 |
|
Mixing Open | Temperature sensor open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 123 |
|
Brief mixing | Mixture temperature sensor short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 124 |
|
SHW T-sensor open | T21 Temperature sensor in SHW opne- ming. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 125 |
|
SHW T-sensor short | T21 Temperature sensor in SHW short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 126 |
|
SHW anode | SHW anode faulty. | The anode should be replaced. |
| 127 |
|
TPres open | T35 Temperature sensor Pressure open connection. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 128 |
|
TPres short | T35 Temperature sensor Pressure short-circuited. | Check the cable and connectors. Measure the resistance in the temperature sensor. |
| 200 |
|
LOM309 missing | Controller is not an Extended version. | Functionality of "Extended version" is selected. Switch Exchange controller to the Extended version or disable the use of this functionality. |
| 600 |
|
High Pres | High-pressure switch active. |
Check the pump/overflow valve on the high-temperature side. Check if there is air in the hot water. Check if the filter on the hot side is clogged. The unit restarts when the pressure drops below the lower limit of the high-pressure switch again. After the 3rd shutdown, the alarm must be acknowledged to restart the unit. |
| 601 |
|
Low pres. | Low pressure switch active. | Check refrigerant charge, expansion valve and evaporator for ice. Check the fan for obstructions in case of an air-water evaporator. The alarm must be acknowledged to restart the unit. |
| 602 |
|
Leakage | Low pressure in bottom pipe - pressure switch active. | Ground system leakage check. The alarm must be acknowledged to restart the unit. |
| 603 |
|
High press | High-pressure switch active repeatedly. | Check the pump/overflow valve on the high temperature side. The alarm must be acknowledged to restart the unit. |
| 604 |
|
Protection against frost | Temperature too low (frost protection). | Heat pump and electric heating are running at full capacity. Check that settings are not disabled. |
| 605 |
|
Overheating heat pump | Supply temperature too high (total stop condition). | Check the pump/overflow valve on the high-temperature side. Check the electric heating element against overheating. |
| 607 |
|
Legionella failure | The anti-legionella function failed twice. | Check the electric heaters and the heat supply to the bottom circuit. |
| 608 |
|
FC alert |
Inverter/FC error feedback switch is active. The FC has an alarm. |
Check the electrical connection and power supply to the inverter. Check that the compressor is running. |
| 609 |
|
FC alert | FC alarm relay activated repeatedly. | Check the electrical connection and power supply to the inverter. Check that the compressor is running. |
| 610 |
|
Tevap Low | Evaporation temperature too low. |
Bottom circuit has low capacity. Tevap is too low. Risk of frost damage to soil circuit. |
| 611 |
|
Tevap Low | Evaporation temperature too low. |
Compressor stopped due to too low soil temperature. Compressor stopped to prevent frost damage. |
| 612 |
|
TMIX to high | Tmix temperature above maximum temperature. | Check the mixing valve and temperature sensor Tmix. |
| 613 |
|
Tmix High Rep | Tmix temperature repeatedly too high. | Check the mixing valve and temperature sensor Tmix. |
| 614 |
|
Cooling low | Temperature cooling is too low. | |
| 615 |
|
El. heater | Faulty electric heater. | |
| 904 |
|
Datalog | Error with internal log. | |
| 905 |
|
Database | Error with internal database. | Controller may be faulty. Try updating the firmware or replace the controller. |
| 907 |
|
RTC err | Error with internal real-time clock. | Replace the controller. |
| 908 |
|
RTC inv | Invalid data from the real-time clock. | Device switched off until long. Set time and date. Otherwise, replace the controller. |
| 909 |
|
LUP SW version | The LUP SW does not match the LMC320. | Update LMC320 to the latest SW version first. |
| 910 |
|
Communication error slave | Fault in communication with slave. | |
| 995 |
|
SW Rejected | The software is not compatible with the LMC320. | Update LMC320 to the latest SW version. |
| 998 |
|
TestVer. | The software is a test version. | Use the release version of the software. |
| 999 |
|
Manuel mode | The device is in manual mode. | Change the mode from Manual to On. |