Setting The Bypass; Setting The Hot Water Temperature; Handing The Product Over To The Operator; Troubleshooting - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

9 Troubleshooting

7 Saturation 17 kPa
A Throughput in circuit
(l/h)
8.6

Setting the bypass

Conditions: D.14 is set to 0 = auto
Caution.
Risk of material damage caused by incor-
rect setting of the high-efficiency pump
When the pressure at the bypass is in-
creased (turning clockwise), malfunctions
may occur if the pump output is set below
95%.
▶
In this case, set the pump output to 5 = 95
to 100% using diagnostics parameter
D.14.
▶
Do not change the factory settings.
Conditions: D.14 is set to 1–5
▶
Remove the front casing. (→ Page 11)
1
▶
Regulate the pressure using the adjusting screw (1).
Pres-
Position of the sure
adjusting screw in MPa
(mbar)
Right-hand stop
0.035
(turned all the
(350)
way down)
Mid-position (six
0.025
anti-clockwise
(250)
rotations)
Five further anti-
clockwise rota- 0.017
tions starting from (170)
the mid-position
▶
Fit the front panel.
24
B Available pressure
(kPa)
Notes/application
If the radiators do not heat
up sufficiently at the default
setting. In this case, you
must set the pump to the
maximum speed.
Default setting
If noises are produced in
the radiators or radiator
valves
Installation and maintenance instructions ecoTEC sustain 0020253094_01
8.7

Setting the hot water temperature

Danger!
Risk of death from Legionella.
Legionella multiply at temperatures below
60 °C.
▶
Ensure that the operator is familiar with all
of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.
▶
Set the hot water temperature.
Conditions: Water hardness: > 3.57 mol/m³
– Hot water temperature: ≤ 50 ℃
8.8

Handing the product over to the operator

▶
When you have finished the installation, affix the en-
closed sticker (which requests that the user reads the
instructions) to the front of the product in the operator's
language.
▶
Explain to the operator how the safety devices work and
where they are located.
▶
Inform the operator how to handle the product.
▶
In particular, draw attention to the safety information
which the operator must follow.
▶
Inform the operator of the necessity to have the product
maintained according to the specified intervals.
▶
Pass all of the instructions and documentation for the
product to the operator for safe-keeping.
▶
Instruct the operator about measures taken to ensure the
supply of combustion air and flue gas pipe. Point out, in
particular, that the operator must not make any changes,
however minor.
▶
Inform the operator that they must not store or use ex-
plosive or highly flammable substances (such as petrol,
paper or paint) in the installation room of the product.
9 Troubleshooting
9.1

Checking service messages

appears, for example, if you have set a maintenance in-
terval and this has passed or if a service message has been
issued. The product is not in fault mode.
▶
Call up the Live Monitor. (→ Page 17)
Conditions: S.46 is displayed.
The product is in Comfort protection mode. The product con-
tinues to run with restricted comfort after it has detected a
fault.
▶
To establish whether or not a component is defective,
read the fault memory. (→ Page 25)
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.