11 Decommissioning
28
Installation and maintenance instructions ecoCRAFT exclusive 0020149561_01
10.1
Contacting your service partner
If you contact your Vaillant service partner, if possible,
please mention
–
The fault code that is displayed (
F.xx
),
–
The product status that is displayed (
S.xx
).
10.2
Reading off the fault codes
If a fault develops in the product, the display will show a fault
code
F.xx
.
Fault codes have priority over all other displays.
If multiple faults occur at the same time, the display shows
the corresponding fault codes for two seconds each in se-
quence.
▶
Rectify the fault.
▶
To restart the product, press the
Fault clearance
button
(
→
Operating instructions).
▶
If you are unable to remedy the fault and the fault recurs
despite several fault clearance attempts, contact Vaillant
Customer Service.
10.3
Resetting parameters to factory settings
▶
To simultaneously reset all parameters to the default
settings, set
d.96
to 1.
10.4
Unlocking the product after it has been
switched off by the safety cut-out
1
If fault code
F.20
is displayed, the safety cut-out has auto-
matically switched off the product because the temperature
is too high.
▶
Remove the front casing. (
→
Page 10)
▶
Remove the covering cap and press the pin
(1)
to unlock
the safety cut-out. You can only press down on the pin
once the temperature of the product is < 80 °C.
▶
After the safety cut-out is triggered, always carry out
troubleshooting and eliminate the cause of the fault.
10.5
Fault in the product
Danger!
Risk of death from electric shock!
Touching live connections may cause serious
personal injury.
▶
Switch off the power supply.
▶
Secure the power supply against being
switched on again.
Not shown in the display
If the product does not start up and nothing is shown in the
display on the operator control panel, check the following
points first:
–
Is 230 V/50 Hz present at the turquoise-coloured plug?
–
Is the main switch switched on?
▶
Check and, if required, replace fuse 4 AT on the PCB in
the electronics box.
The product does not respond to a VRC 470, 630,
VRS 620 or VRC 700 control
▶
Check the connection between the "Bus" connections in
the control and the product.
Conditions
: VRC 630, VRS 620 or VRC 700
▶
Switch the control off and on again so that it re-reads the
bus participants.
The product does not respond to a two-point con-
trol system
▶
Measure whether the switching contact between termin-
als 3 and 4 was closed by the external control.
▶
Place a bridge between terminals 3 and 4. If the product
starts up after this, you must check the external control.
The product does not respond to a hot water re-
quest
▶
Check the settings for the control.
▶
Check the cylinder charging pump.
▶
Check the settings for the cylinder target value in the DIA
system.
11 Decommissioning
11.1
Decommissioning the product
▶
Switch off the product.
▶
Disconnect the product from the power mains.
▶
Close the gas isolator cock.
▶
Close the cold water stop valve.
▶
Drain the product via the filling and drainage tap
(
→
Page 27).
