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Remeha

Calenta 15 Ace

Regular 15kW 2019-present ErP A 35 fault codes

<p>The Calenta 15 Ace is a combi boiler from Remeha, available at 15kW output. Produced 2019-present.</p>

Calenta 15 Ace Fault Codes 35

Code Description Severity Type
01 No Flame Detected The boiler has failed to ignite or lost its flame. Gas supply, ignition electrode, or gas… High Engineer View Guide
02 Safety Thermostat Activated The boiler has exceeded its maximum safe temperature and the safety thermostat has triggered. High Engineer View Guide
03 Flue Gas Thermostat Activated The flue gas temperature has exceeded the safe limit. High Engineer View Guide
04 False Flame Signal The ionisation electrode is detecting a flame when the gas valve should be closed. This is… High Engineer View Guide
05 Flame Lost During Operation The flame was established but has been lost during normal operation. High Engineer View Guide
06 Fan Fault The fan is not running at the correct speed or is not starting. High Engineer View Guide
07 Air Pressure Switch Fault The air pressure switch is not detecting correct airflow. High Engineer View Guide
08 Gas Valve Fault The gas valve is not responding correctly to commands from the PCB. High Engineer View Guide
10 Flow Temperature Sensor Fault The flow NTC temperature sensor has developed a fault. Medium Engineer View Guide
11 Return Temperature Sensor Fault The return NTC temperature sensor has a fault or open circuit. Medium Engineer View Guide
12 DHW Temperature Sensor Fault The domestic hot water NTC sensor has developed a fault. Medium Engineer View Guide
14 Low Water Pressure System water pressure has dropped below the safe minimum. Low DIY View Guide
15 Pump Fault The circulation pump is not running or is blocked. High Engineer View Guide
16 Pump Over-Speed The pump is running faster than expected, possibly indicating an internal fault. Medium Engineer View Guide
18 PCB Fault The printed circuit board has an internal communication or memory error. High Engineer View Guide
20 Outdoor Sensor Fault The outdoor temperature sensor is faulty or disconnected. Low Engineer View Guide
22 Overheat Protection Safety thermostat activated due to overheating. High Engineer View Guide
23 Flow/Return Differential Too Large Temperature gap abnormal — poor circulation. Medium Engineer View Guide
24 Condensate Drain Blocked The condensate drain pipe is blocked or frozen. Medium DIY View Guide
25 Rapid Temperature Rise Flow temp rising too quickly. High Engineer View Guide
26 Flame Detected After Shutdown Flame signal with gas valve closed. High Engineer View Guide
27 Ignition Electrode Fault The ignition electrode is worn or not sparking correctly. High Engineer View Guide
28 Combustion Fault Air/gas outside limits. High Engineer View Guide
29 Diverter Valve Timeout Valve didn't switch in time. Medium Engineer View Guide
30 Three-Way Valve Fault The diverter/three-way valve is stuck or not switching correctly between heating and hot water. Medium Engineer View Guide
31 eBUS Fault Communication fault. Medium Engineer View Guide
32 Mains Voltage Fault Voltage outside range. Medium Engineer View Guide
33 EEPROM Error PCB memory error. High Engineer View Guide
34 Phase/Neutral Reversed Polarity reversed. High Engineer View Guide
35 Combustion Fault The combustion quality is outside the acceptable range. High Engineer View Guide
36 Coding Plug Fault Coding plug unreadable. High Engineer View Guide
37 Flue Gas Overheat Flue gas too hot. High Engineer View Guide
38 Frost Protection Frost protection running. Medium DIY View Guide
39 Pressure Sensor Fault Electronic sensor faulty. Medium Engineer View Guide
40 Pump Speed Error Pump running outside range. Medium Engineer View Guide

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