Vaillant aroTHERM VWL ../2 A 230 V series Installation Instructions Manual

Troubleshooting 80020147164_07 aroTHERM Installation instructions 271231. Remove the side casing. (→ Page 14)2. Remove both screws (1).3. Lift off the cover.4. Remove the four screws (2) and remove the mesh (3).5. Clean the product.7.6 Draining the productConditions: SW10 open-end spanner▶ Disconnect the product from the power supply.10mm211 Heating circuit draincock2 Drain hose1. Close the stop valves on the back of the heat pump.2. To drain the heating circuit, connect a hose to the draincock or place a vessel underneath the drain cock.3. Open the drain cock with an open-end spanner.NoteIf necessary, you can drain the heatinginstallation using this drain cock by openingthe stop valves on the back of the heatpump.7.7 Checking the product's status codesMenu → Live MonitorYou can check the product's status codes at any time to seewhich operating condition the heat pump is in. You can readthese codes on the display of the heat pump control moduleor hydraulic station.Status codes (→ Page 34)7.8 Checking the electrical installation▶ Check the electrical installation and take all relevant dir-ectives into account.Checking the cableIf the product's mains power cable is damaged, then, in orderto avoid danger, only the manufacturer, the Customer Ser-vice team or a similarly qualified person should replace themains power cable.▶ To replace the mains power cable, see Carrying out theelectrical installation (→ Page 17).7.9 Start-up following maintenance1. After the maintenance work has been completed, startup the product – see Start-up (→ Page 21).2. If you have carried out work on load-bearing parts,check that they are securely fitted.3. When you have completed work on the product, carryout an operational and safety test.8 Troubleshooting8.1 TroubleshootingYou should carry out the following tests before introducingadditional steps:▶ Make absolutely sure that the power supply was not cutand that the product is correctly connected.▶ Ensure that the service valves are open.▶ Check that all external controllers are correctly connec-ted.8.2 Fault codesThe fault codes are described in a table in the Appendix.Fault codes (→ Page 38)In the event of a fault, a fault code number is shown in thecontroller's display.▶ Carry out all necessary repairs.▶ Switch the product on/off using the partition.