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Vaillant Control Center VR 65 Manual

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10 Installation Instructions for Control Center VR 65
6 Start-up
The initial start-up of the VR 65 is carried out together
with the initial start-up of the heating appliance.
Note!
In the factory settings, the heating appliance
operation is set to warm water priority.
Note!
To comply with the approvals, the boiler must
be Vaillant ecoTEC if the cylinder NTC solution
is used.
If a parallel operation for central heating and charging of
the DHW cylinder is required, change this setting on the
boiler in the following way.
• Press the “i” and “+” keys simultaneously.
The display shows “d.00”.
• Use the “+” or “-” keys to scroll to the diagnostic
number d.97 to enter the second diagnostic level.
• Press the “i” key.
The display shows the relevant diagnostic information.
• Use the “+” or “-” keys to change the value (display
flashes) to 17 (password).
• Save the new value by pressing and holding down the
“i” key for approx. 5 seconds until the display no long-
er flashes.
• Use the ‚+‘ and ‚-‘ keys to scroll to the diagnostic point
d.70
• Press the “i” key.
Change the setting using the ‚+‘ and ‚-‘ keys.
• Save the new value by holding down the “i” key for
approx. 5 seconds until the display no longer flashes.
You can end the diagnostic mode as follows:
• Press the “i” and “+” keys simultaneously.
The following settings are possible:
Display Meaning
Factory
setting
0 Warm water priority
- The 3-port valve is in the heating or
hot water position depending on the
operating mode.
- With 2-port valves, either the DHW
valve or the CH valve is open, both
valves are closed on standby.
x
1 Enable mid position
- The 3-port valve is in the mid position
for simultaneous heating and hot
water request, or in the heating or
hot water position, depending on the
operating mode.
- With 2-port valves, both valves are
open during simultaneous heating
and hot water request. Otherwise,
only one valve is always open and
both valves are closed on standby.
2 Only heating mode (only for test
operation!)
- Only the CH valve is activated.
Table 6.1 Heating appliance settings
7 Troubleshooting
The Control Center VR 65 has a green Operating LED,
which can be monitored when the housing cover is
removed (see fig. 4.2).
Problem Cause Remedy
LED permanently
off
No 230 V supply
available or fuse in
appliance defective
- Check whether the
mains voltage cable
is connected
correctly.
- Check the mains
fuse for the 230 V
supply and
reconnect the mains
supply.
- Replace the mains
fuse in the VR 65
(4 A slow).
LED permanently
on
No error - Normal operation
LED flashes quickly Short circuit of the
connected tempera-
ture sensor (NTC) in
the DHW cylinder
- Check the cable of
the temperature
sensor (NTC) for
damage.
- Replace the temper-
ature sensor (NTC)
in the DHW cylinder.
LED flashes slowly Communication error
in eBUS protocol to
the boiler
- Inform the Vaillant
customer service.
Table 7.1 Troubleshooting
6 Start-up
7 Troubleshooting
… 10


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