What does it mean if my Vaillant Boiler shows eBUS undervoltage?
An eBUS undervoltage indication means there could be a short circuit on the eBUS, an overload on the eBUS, or two power sources on the eBUS with different polarity. Check the eBUS connections and power sources.
What to do if the heating system of my Vaillant ecoTEC plus 624 Boiler is not full of water?
If your Vaillant Boiler's heating system isn't full of water or charged correctly, make sure the heating system is full of water and charged to between 1 and 1.5 bar. If it's not, refill and vent the system.
What to do if my Vaillant ecoTEC plus 624 Boiler is dry firing?
If your Vaillant Boiler is dry firing, it indicates there may be too little water in the appliance, a defective water shortage switch, a defective cable to the pump or water shortage switch, a blocked or defective pump, or the pump output is too low. Ensure adequate water supply and check the water shortage switch and pump.
What to do if my Vaillant Boiler shows flow and/or return NTC fault?
If there is a flow and/or return NTC fault, the flow and/or return NTC is defective (tolerances too big). Replace the flow and/or return NTC.
What to do if the gas supply to my Vaillant Boiler is off?
If the gas supply to your Vaillant Boiler is off or not correctly purged, check that the gas supply to the boiler is on, that it has been correctly purged, and that an inlet pressure of 20 mbar is available at the gas valve.
How to fix Return NTC short circuit in Vaillant ecoTEC plus 624 Boiler?
A Return NTC short circuit can be caused by a defective NTC, a short circuit in the cable harness, or a cable/casing shortcut. Replace the NTC and inspect the cable harness.
What causes a short circuit in the tank sensor of my Vaillant ecoTEC plus 624?
A short circuit in the tank sensor of your Vaillant Boiler can be caused by a defective NTC, an earth leak/short circuit in the cable loom, or a damp plug connection. Inspect and replace the NTC or repair damp connections.
What does it mean 'No valid DSN in AI and/or BMU' in Vaillant Boiler?
If your Vaillant Boiler displays 'No valid DSN in AI and/or BMU', it indicates a spare part failure where the AI and motherboard were interchanged at the same time. Replace faulty components to resolve DSN issue.
What to do if my Vaillant ecoTEC plus 624 has no communication to mainboard?
If there is no communication to the mainboard, there might be a connection error between the display and the mainboard. Check the connections to the mainboard.
What to do if there is a short circuit in the flow-NTC of my Vaillant ecoTEC plus 624?
If there is a short circuit in the flow-NTC of your Vaillant Boiler, it could be due to the NTC plug shorted to the casing or a defective NTC. Inspect and replace the NTC if defective.
Details on manual usage, safety symbols, and applicable documents for clarity.
Overview of ecoTEC boiler types, features, and operation principles.
Explains safety instructions and symbols for safe operation and installation.
Detailed technical specifications including heat output, dimensions, gas pressure, and electrical data.
Provides diagrams and measurements for boiler installation and required clearances.
Lists relevant regulations, British Standards, and publications for boiler installation.
Specifies requirements for boiler location, space, ventilation, and frost protection.
Details gas supply connection and regulations for standard and optional flue systems.
Outlines mains electricity supply requirements, earthing, and connection methods.
Guidance on safe manual handling and positioning of the boiler during installation.
Specifies minimum clearances around the boiler for installation and servicing.
Procedure for connecting the gas supply and heating system pipework.
Explains wiring procedures for connecting the boiler to the main electrical supply.
Describes Vaillant controls, external electrical connections, and accessory compatibility.
Covers initial checks for electrical supply, gas supply, and cold water systems.
Guide on filling the heating system, bleeding air, and checking pressure.
Details annual inspection and maintenance tasks for safe boiler operation.
Instructions for removing, cleaning, and refitting the burner module for maintenance.
Procedure for cleaning the condensate siphon for proper drainage and safety.
A systematic approach to diagnosing and resolving common boiler faults.
Explanation of status codes (S.x) and diagnostic codes (d.x) for appliance monitoring.
Crucial safety precautions before and during component replacement.
Guidance on replacing common parts like the burner, fan, gas valve, and heat exchanger.
Document certifying the boiler's compliance with relevant EC directives.
Checklist for ensuring proper installation, commissioning, and handover of the boiler.
General| Model | ecoTEC plus 624 |
|---|---|
| Category | Boiler |
| Output | 24 kW |
| Dimensions (H x W x D) | 720 x 440 x 338 mm |
| Mounting | Wall-mounted |
| Fuel | Natural Gas |
| Warranty | 5 years |
| Type | Combination |
| Central Heating Flow Temperature Range | 30°C to 80°C |
To Next Page