Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Also see for ecoTEC sustain 24: Operating instructions Installation and maintenance instructions

0020253094_05 ecoTEC sustain Installation and maintenance instructions 397. Check that the sealing ring in the air intake pipe is posi-tioned correctly in the seal seat.8. Reconnect the air intake pipe to the intake stub.9. Secure the air intake pipe with the retaining screw.10. Check the gas flow pressure.12.14 Draining the product1. Close the service valves of the product.2. Start check programme P.06 (prioritising diverter valvemid-position).3. Open the draining cock.4. Make sure that the cap of the automatic air vent onthe internal pump is open so that the product can bedrained fully.12.15 Checking the admission pressure of theexpansion vessel1. Drain the product. (→ Page 39)2. Measure the pre-charge pressure of the expansion ves-sel at the vessel valve.Condition: Pre-charge pressure < 0.075 MPa (0.75 bar)▶ Fill the expansion vessel in accordance with the staticheight of the heating installation; ideally with nitrogen,otherwise with air.▶ Ensure that the drain valve is open when filling.3. If water escapes from the valve of the expansion ves-sel, replace the expansion vessel (→ Page 41).4. Fill and purge the heating installation. (→ Page 29)12.16 Completing inspection and maintenancework▶ Start a test operation after the maintenance.▶ Check the heating mode and, if required, the domestichot water generation (if available).▶ Check the gas connection pressure (gas flow pressure).(→ Page 30)▶ Check the CO₂ content. (→ Page 31)▶ If required, reset the maintenance interval. (→ Page 33)▶ Install the front casing.▶ Fill out the relevant Service Record section in the Bench-mark Checklist.12.17 Checking the product for leak-tightness▶ Check that the product is leak-tight. (→ Page 32)13 Troubleshooting13.1 Checking service messagesappears, for example, if you have set a maintenance inter-val and this has passed or if a service message has been is-sued. The product is not in fault mode.▶ Call up the Live Monitor. (→ Page 26)Condition: S.46 is displayed.The product is in Comfort protection mode. The product con-tinues to run with restricted comfort after it has detected afault.▶ To establish whether or not a component is defective,read the fault memory. (→ Page 39)NoteIf no fault message is present, the product willautomatically switch back to normal operatingmode after a certain time.13.2 Rectifying faults▶ If fault codes (F.XX) are present, refer to the table in theappendix for advice or use the check programme(s).Overview of fault codes (→ Page 50)Check programmes – Overview (→ Page 45)If several faults occur at the same time, the fault codes areshown alternately on the display.Resetting the product:▶ Press and hold the button for more than threeseconds.◁ The product restarts.▶ If you are unable to clear the fault code and it reappearsdespite several fault clearance attempts, contact cus-tomer service.13.3 Calling up the fault memoryThe last ten fault codes are stored in the fault memory.▶ Call up the installer level. (→ Page 26)◁ d.-- is shown in the display.▶ Press the button 2 times.◁ F.XX is shown in the display.▶ Press the and buttons to call up the fault codes.Overview of fault codes (→ Page 50)◁ The fault code and the time of occurrence are shownalternately on the display.▶ Press .◁ The display switches to the basic display.