*****INTERNAL*****30 R_D proof- 26.10.2022 / 09:15:46- VaillantGroup\DOC-agt\Brand\VIH_QW_190_6\ENG\OI-II_GB_0020291525
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Installation and maintenance instructions 0020291525_04
Configuring the heating installation ..................... 41
Instructing the end user ....................................... 41
Troubleshooting ................................................ 42
Contacting your service partner........................... 42
Reading off the fault codes.................................. 42
Querying the fault memory .................................. 42
Resetting the fault memory.................................. 42
Displaying Live Monitor (status codes)................ 42
Using the function menu...................................... 42
Carrying out the actuator test .............................. 42
Safety cut-out....................................................... 42
Resetting parameters to factory settings ............. 43
Inspection and maintenance ............................ 43
Procuring spare parts .......................................... 43
Checking maintenance messages....................... 43
Preparing for inspection and maintenance .......... 43
Using check programmes.................................... 43
Cleaning the domestic hot water cylinder............ 44
Draining .............................................................. 44
Draining the product's heating circuit................... 44
Decommissioning.............................................. 44
Decommissioning the product ............................. 44
Recycling and disposal..................................... 44
Customer service............................................... 44
Appendix ............................................................................ 45
A
Functional diagram............................................ 45
Wiring diagram................................................... 46
Control PCB ....................................................... 47
Installer level overview...................................... 50
Status codes ...................................................... 53
Maintenance messages .................................... 56
Comfort protection mode.................................. 56
Fault codes......................................................... 56
Inspection and maintenance work................... 61
Characteristic values for the internal
temperature sensors, hydraulic circuit ........... 61
Characteristic values for the VRC DCF
outdoor temperature sensor............................. 63
Commissioning Checklist................................. 64
Technical data.................................................... 67
Index ................................................................................... 70