Kronoterm · A niche brand in the UK. 87 codes across 2 product families, each taken from the manufacturer’s manuals. Kronoterm technical support ↗
Filter by product family
Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
87 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 2114-b3 | High pressure | Yes | Yes |
| 2114-b7 | Low pressure | Yes | Yes |
| 2114-b8 | CP phase control | Yes | Yes |
| 2114-b9 | No water flow | Yes | Yes |
| 2114-b14 | Efficiency | Yes | Yes |
| 2115-b0 | Failure module 1 | Yes | Yes |
| 2115-b1 | Failure module 2 | Yes | Yes |
| 2115-b4 | Too high compressor temperature | Yes | Yes |
| 2115-b5 | Communication failure - outdoor unit | Yes | Yes |
| 2115-b8 | Max. number of defrosting | Yes | Yes |
| 2116-b2 | Temperature sensor fault - condenser inlet (T28) | Yes | Yes |
| 2116-b3 | Temperature sensor fault - condenser outlet (T27) | Yes | Yes |
| 2117-b10 | Outlet minimum temperature | Yes | Yes |
| 2117-b13 | Remote shutdown | No | Yes |
| 2119-b14 | No model set | Yes | Yes |
| 2119-b15 | Outdoor unit fault | Yes | Yes |
| 2124-b7 | No response from cascade modules | No | Yes |
| 2124-b8 | Cascade module 1 has to be inspected | No | Yes |
| 2124-b9 | Cascade module 2 has to be inspected | No | Yes |
| 2124-b10 | Cascade module 3 has to be inspected | No | Yes |
| 2124-b11 | Cascade module 4 has to be inspected | No | Yes |
| 2126-b0 | Communication failure with cascade module 1 | Yes | Yes |
| 2126-b1 | Communication failure with cascade module 2 | Yes | Yes |
| 2126-b2 | Communication failure with cascade module 3 | Yes | Yes |
| 2126-b3 | Communication failure with cascade module 4 | Yes | Yes |
| 2126-b8 | Failure on cascade module 1 | Yes | Yes |
| 2126-b9 | Failure on cascade module 2 | Yes | Yes |
| 2126-b10 | Failure on cascade module 3 | Yes | Yes |
| 2126-b11 | Failure on cascade module 4 | Yes | Yes |
| 2186-b0 | Heating loop thermostat failure 1 | Yes | Yes |
| 2186-b1 | Heating loop thermostat failure 2 | Yes | Yes |
| 2186-b2 | Heating loop thermostat failure 3 | Yes | Yes |
| 2186-b3 | Heating loop thermostat failure 4 | Yes | Yes |
| 2330-b5 | Refrigerant loss | No | Yes |
| 2335-b3 | AC over voltage fault | Yes | Yes |
| 2335-b4 | AC under voltage fault | Yes | Yes |
| 2335-b8 | Input loss of phase fault | Yes | Yes |
| 2339-b0 | Temperature sensor fault - DHW (T1) | Yes | Yes |
| 2339-b1 | Temperature sensor fault - outdoor heating system (T2) | Yes | Yes |
| 2339-b2 | Temperature sensor fault - 1st loop (T3) | Yes | Yes |
| 2339-b3 | Temperature sensor fault - 2nd loop (T4) | Yes | Yes |
| 2339-b4 | Temperature sensor fault - 3rd loop (T5) | Yes | Yes |
| 2339-b5 | Temperature sensor fault - 4th loop (T6) | Yes | Yes |
| 2339-b6 | Temperature sensor fault - pool (T7) | Yes | Yes |
| 2339-b7 | Temperature sensor fault - solar/biomass (T8) | Yes | Yes |
| 2339-b8 | Temperature sensor fault - buffer tank 1 (T9) | Yes | Yes |
| 2339-b9 | Temperature sensor fault - buffer tank 2 (T10) | Yes | Yes |
| 2339-b12 | Temperature sensor fault - outlet HP (T15) | Yes | Yes |
| 2339-b13 | Temperature sensor fault - inlet HP (T16) | Yes | Yes |
| 2339-b14 | Temperature sensor fault - outlet after elect. heater (T13) | Yes | Yes |
| 2339-b15 | Temperature sensor fault - inlet indoor unit (T14) | Yes | Yes |
| 2340-b7 | Pressure sensor fault - heating system (T25) | Yes | Yes |
| 2340-b8 | Flow sensor fault - heating system (T26) | Yes | Yes |
| 2340-b9 | SD card fault | Yes | Yes |
| 2341-b4 | Low pressure - heating system | No | Yes |
| ALARM-DHW | Device unable to heat DHW above the minimum set value 3 times | Yes | Yes |
| ALARM-RTC-FAIL | Error on the PLC frequency oscillator | Yes | Yes |
| Carel-EEV-error | The Carel (EEV) controller is malfunctioning | Yes | Yes |
| Carel-probe-error | Carel probe 1-4 not connected or damaged | Yes | Yes |
| Caution-flow | Flow switch not closed - no or insufficient water flow; after 120 s device enters compressor protection (Standby) and retries | Partly | Yes |
| Comp-temp-too-high | Too high compressor temperature | Yes | Yes |
| Defrost-T-Flow-ALARM | Return water temperature during defrost too low - HP lacks energy to defrost | Yes | Yes |
| Efficiency | The device does not heat / does not generate enough heat | Yes | Yes |
| ERROR-Cascade | Individual device did not respond 3x during cascade verification (MD1 to MD4) | Partly | Yes |
| ERROR-HeatSourceTemp | Source temperature outside operating range | Yes | Yes |
| ERROR-NO-WATER | Heat source pump switched off or shortage of water for the heat source / insufficient flow of medium between HP and heating system | Yes | Yes |
| ERROR-Sensor | Alarm: one of the sensors (1-18) is not connected or is damaged | Yes | Yes |
| ERROR-Thermostat | Room corrector (KT-1/KT-2) 1-4 not connected properly or malfunctioning | Partly | Yes |
| HpCool | Alarm: refrigerant pressure too high during cooling | Yes | Yes |
| HpDHW | Alarm: refrigerant pressure too high during DHW heating | Yes | Yes |
| HpHeat | Alarm: refrigerant pressure too high during heating | Yes | Yes |
| INV-Error-xx | External device (inverter) error number xx | Yes | Yes |
| Low-Comp-temp | Compressor temperature too low; after three indications the PZ PROG is activated | Yes | Yes |
| Low-Cond-temp | Plate heat exchanger temperature too low; after three indications PZ PROG activated | Yes | Yes |
| LpCool | Alarm: refrigerant pressure too low during cooling (displayed "LpCol") | Yes | Yes |
| LpDHW | Alarm: refrigerant pressure too low during DHW heating | Yes | Yes |
| LpHeat | Alarm: refrigerant pressure too low during heating (displayed "LpHea") | Yes | Yes |
| Max-dT | Temperature difference between supply and return too high | Yes | Yes |
| Max-ODT-h | Maximum number of defrosts per hour reached | Yes | Yes |
| MODULE-5-6-ALARM | No communication with Carel EEV 1 (module 5) / EEV 2 (module 6) | Yes | Yes |
| MODULE-ALARM | Malfunction of one of the modules (MODULE 1-4 ALARM); device restarts automatically after the error is resolved | Yes | Yes |
| MODULE-INV-ALARM | No connection with the external device (inverter) | Yes | Yes |
| OC1-communication | No communication with main circulation pump (CP) | Not stated | Yes |
| OC2-communication | No communication with source circulation pump (CP) | Not stated | Yes |
| RESET-MODUL | One of the modules is in self-reset process | Not stated | Yes |
| S01 | Initialization error - incorrect initialization of indoor and outdoor unit, incorrect KT-2A operation mode setting or incorrectly connected communication cable | Yes | Yes |
| Tz | Alarm: overvoltage, undervoltage or inverted phase sequence in the electrical supply | Yes | Yes |