Error Code | Error Level | Classification | Function | Diagnosis/Actions |
---|---|---|---|---|
E001 | 3 or 2 | Combustion system | Combustion systemHeat exchanger overheating | Manual reset |
E003 | 3 | Combustion system | Ignition error | Manual reset |
E004 | 2 | Combustion system | False flame detection | Auto reset |
E012 | 3 | Combustion system | Flame loss | Manual reset |
E016 | 3 | Combustion system | Heat exchanger overheating | Manual reset |
E030 | 3 | Combustion system | Exhaust overheat: exhaust limit switch stops the boiler when the flue temperature exceeds 110°C (230°F) for more than 10 sec. | Manual reset Auto reset |
E046 | 2 | Combustion system | Heat exchanger thermistor error | Auto reset |
E047 | 3 2 | Combustion system | Exhaust thermistor error | Manual reset |
E060 | 2 | Combustion system | Dual venturi limit switch error | Auto reset |
E109 | 3 | Air supply system | Fan motor activity error | Manual reset |
E110 | 3 | Air supply system | Exhaust blockage | Manual reset |
E127 | 2 3 | Air supply system | APS error (open, short, initial value or no response) | Auto reset Manual reset |
E205 | 2 | CH system | H/E outlet error: thermistor open or short | Auto reset |
E218 | 1 | CH system | H/E inlet error: thermistor open or short | Alarm |
E302 | 2 | Water supply system | Low water pressure error | Auto reset |
E352 | 2 | Water supply system | High water pressure error | Auto reset |
E353 | 2 | Water supply system | Water pressure sensor error | Auto reset |
E407 | 1 | DHW system | Hot water outlet 1: thermistor open or short | Alarm |
E421 | 2 | DHW system | Cold water inlet 1: thermistor open or short | Auto reset |
E515 | 3 | Controller | PCB error | Manual reset |
E517 | 3 | Controller | DIP switch setting error | Manual reset |
E594 | 1 | Controller | Partial PCB communication error | Alarm |
E615 | 3 | Controller | Input and memory error | Manual reset |
E740 | 2 | Hardware | Outdoor sensor error | Auto reset |
E782 | 1 | Hardware | Main panel communication error | Auto reset |
E783 | 1 | Hardware | OT-remote controller error | Auto reset |
E787 | 2 3 | Hardware | Device reset error | Manual reset |
Error Code | Classification | Sub Code | Function | Diagnosis/Actions |
---|---|---|---|---|
E001 | Combustion system | 0 | Heat exchanger overheating | 1. Clean the strainer. 2. Check voltage via PCB at the pump 3. (AC 230 V) 4. Check that the flow rate is correct 5. Check if water is circulating in the heating lines. 6. Check the heat exchanger and flush it with cleaning solution if necessary. |
E003 | Combustion system | 0 | Ignition failure | 1. Check the main gas supply 2. Check if the manual gas valve is open. 3. 2. Check if the igniter is sparking. 4. 3. Tighten the ground terminals on the heat exchanger. |
E004 | Combustion system | 0 | False flame detection | 1. Ensure that the ground wire is connected. 2. Check if the igniter is sparking. |
E012 | Combustion system | 0 | Flame loss | 1. Check if the main gas valve is open and verify the incoming gas pressure. 2. Check the intake air filter. 3. Check the ground wire. 4. Check the power supply. 5. Tighten the ground terminals on the heat exchanger. 6. Adjust the anti-short cycle time. |
E016 | Combustion system | 0 | Heat exchanger overheat | 1. Turn OFF the boiler, wait at least 30 min, and then restart the boiler. 2. Clean the inlet water filter and strainer. 3. Check the high limit switch and PCB. 4. Check the 3-way valve. 5. Check the heat exchanger and flush it if required. |
E030 | Combustion system | 0 | Exhaust overheat: exhaust limit switch stops the boiler when the flue temperature exceeds 110°C (230°F) for more than 10 sec. | 1. Turn OFF the boiler, wait at least 30 min, and then restart the boiler. 2. Clean the strainer. 3. Check the heat exchanger and flush it if required. |
E046 | Combustion system | 2 | Heat exchanger thermistor short error | Check the heat exchanger thermistor connection. |
E047 | Combustion system | 1 2 | Exhaust thermistor open error Exhaust thermistor short error | Check the exhaust thermistor connection. |
E060 | Combustion system | 1 2 3 | Dual venturi limit switch error (ON) Dual venturi limit switch error (Closed OFF) Dual venturi limit switch error (Open ON) | Check the dual venturi connection. |
E109 | Air supply system | 0 | Fan motor activity error | 1. Check and clean the air intake filter. 2. Check and clean the fan motor. 3. Test the voltage from the PCB to ensure that it is correct. Replace fan if PCB voltage is normal. |
E110 | Air supply system | 1 2 3 | Exhaust blockage (fan) Exhaust blockage (DHW) Exhaust blockage (space heating) | 1. Check the exhaust pipe for obstructions. 2. Check and clean the intake air filter. 3. If possible, remove the exhaust pipe to ensure that the flue is clear. |
E205 | CH system | 1 2 | Heating supply thermistor open error Heating supply thermistor short error | 1. Check the thermistor. 2. Check pump wiring connections. |
E218 | CH system | 1 2 | Heating return thermistor open error Heating return thermistor short error | Check the thermistor. |
E302 | Water supply system | 0 | Low water pressure error | 1. Check the feeder valve. 2. Check the incoming water pressure and activity at the PRV. |
E352 | Water supply system | 0 | High water pressure error | 1. Check the feeder valve. 2. Check the incoming water pressure and activity at the PRV. |
E353 | Water supply system | 1 2 | Water pressure sensor open error Water pressure sensor short error | Check the water pressure sensor. |
E407 | DHW system | 1 2 | Hot water outlet thermistor open error Hot water outlet thermistor short error | 1. Check the thermistor. 2. Replace the thermistor. |
E421 | DHW system | 1 2 | Cold water inlet thermistor open error Cold water inlet thermistor short error | 1. Check the thermistor. 2. Replace the thermistor. |
E515 | Controller | 1 8 9 10 11 13-14 | PCB internal communication error PCB to igniter communication error PCB to fan communication error PCB monitoring device error PCB to dual venturi communication error PCB to 3-way valve communication error | Check the PCB. 1. Check the PCB connection. 2. Check the igniter. 1. Check the PCB connection. 2. Check the fan. 1. Check the PCB connection. 1. Check the PCB connection. 2. Check the dual venturi. 1. Check the PCB connection. 2. Check the 3-way valve. |
E517 | Controller | 0 | Dip switch setting error | Check the dip switches on the front panel and the PCB. |
E594 | Controller | 0 | Partial PCB communication error | Check the PCB. |
E615 | Controller | 0 1 2 14 15-16 | Heat exchanger 1, high limit switch input data error Exhaust sensor input data error Flame rod input data error PCB memory error Pressure sensor input data error Sub code 15: < the range Sub code 16: > the range | Check the PCB. 1. Check the exhaust sensor wiring connections. 2. Check the exhaust sensor. 1. Check the flame rod wiring connections. 2. Check the flame rod. Check the PCB. 1. Check the pressure sensor wiring connections. 2. Check the pressure sensor’s output voltage. |
E740 | Hardware | 1 2 | Outdoor temperature sensor open error (appears only when outdoor reset is enabled). Outdoor temperature sensor short error (appears only when the outdoor reset is enabled). | 1. Ensure that outdoor reset curve is correctly configured. 2. Check the outdoor temperature sensor’s wiring connections. |
E782 | Hardware | 0 | Main panel communication error | Check the PCB. |