*****INTERNAL*****30 R_D proof- 26.10.2022 / 09:15:46- VaillantGroup\DOC-agt\Brand\VIH_QW_190_6\ENG\OI-II_GB_0020291525
16 Installation and maintenance instructions 0020291525_04
9 Adapting the unit to the heating
installation.......................................................... 41
9.1 Configuring the heating installation ..................... 41
9.2 Total pressure loss in the product, building
circuit ................................................................... 41
9.3 Total pressure loss in the product, domestic
hot water.............................................................. 41
9.4 Instructing the end user ....................................... 41
10 Troubleshooting ................................................ 42
10.1 Contacting your service partner........................... 42
10.2 Reading off the fault codes.................................. 42
10.3 Querying the fault memory .................................. 42
10.4 Resetting the fault memory.................................. 42
10.5 Displaying Live Monitor (status codes)................ 42
10.6 Using the function menu...................................... 42
10.7 Carrying out the actuator test .............................. 42
10.8 Safety cut-out....................................................... 42
10.9 Resetting parameters to factory settings ............. 43
11 Inspection and maintenance ............................ 43
11.1 Procuring spare parts .......................................... 43
11.2 Checking maintenance messages....................... 43
11.3 Observing inspection and maintenance
intervals ............................................................... 43
11.4 Preparing for inspection and maintenance .......... 43
11.5 Using check programmes.................................... 43
11.6 Checking the pre-charge pressure of the
expansion vessel ................................................. 43
11.7 Cleaning the domestic hot water cylinder............ 44
12 Draining .............................................................. 44
12.1 Draining the product's heating circuit................... 44
12.2 Draining the product's domestic hot water
circuit ................................................................... 44
13 Decommissioning.............................................. 44
13.1 Decommissioning the product ............................. 44
14 Recycling and disposal..................................... 44
15 Customer service............................................... 44
Appendix ............................................................................ 45
A Functional diagram............................................ 45
B Wiring diagram................................................... 46
C Control PCB ....................................................... 47
D Basic connection diagram for the energy
supply company lockout, shutdown via
connection S21 .................................................. 48
E Basic connection diagram for the energy
supply company lockout, shutdown via
partition .............................................................. 49
F Installer level overview...................................... 50
G Status codes ...................................................... 53
H Maintenance messages .................................... 56
I Comfort protection mode.................................. 56
J Fault codes......................................................... 56
K 5.4 kW back-up heater at 230 V and at
400 V ................................................................... 61
L Inspection and maintenance work................... 61
M Characteristic values for the internal
temperature sensors, hydraulic circuit ........... 61
N Characteristic values for the VR10
internal temperature sensors, cylinder
temperature........................................................ 62
O Characteristic values for the VRC DCF
outdoor temperature sensor............................. 63
P Commissioning Checklist................................. 64
Q Technical data.................................................... 67
Index ................................................................................... 70
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