Handing The Product Over To The Operator; Troubleshooting; Comfort Protection Mode For The Heat Cell; Checking Service Messages - Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual

9 Troubleshooting

Pres-
Position of the sure
adjusting screw in MPa
(mbar)
5 further turns to
0.017
the left from the
(170)
mid-position
▶
Install the front casing.
8.6

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 that they must have the product
maintained in accordance with the specified intervals.
▶
Pass all of the instructions and documentation for the
product to the operator for safe-keeping.
▶
Inform the operator about measures taken to ensure the
supply of combustion air and flue gas guiding, and in-
struct the operator that he must not make any changes.
▶
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.
▶
Complete and sign off the Benchmark commissioning
check list.
▶
Complete and sign off the guarantee documentation.
9 Troubleshooting
9.1

Comfort protection mode for the heat cell

Conditions: Neither nor a fault code F.xx are shown in the display
Unusual operating noises are emitted from the heat cell in
the product.
▶
Check whether S.40 is displayed in Live monitor.
If S.40 is displayed, the product is in a temporary test mode,
which it again exits automatically.
Conditions: is displayed.
The Live monitor shows S.40 and D.118 is at 0. The heat
cell is in permanent comfort protection mode. This is not
caused by the all-gas sensor.
▶
Decommission the product and check the entire air/flue
pipe.
▽
Are there any blockages or leaks?
▶
Eliminate the cause.
▽
Are any components damaged?
▶
Replace the defective components.
▶
If the air/flue pipe is OK, restart the product.
▶
Prepare the flue gas analyser for checking the recircula-
tion.
26
Notes/application
If noises are produced in
the radiators or radiator
valves
Installation and maintenance instructions ecoTEC exclusive 0020193966_01
◁
The measuring probes must be rinsed and must not
be contaminated by a previous measurement.
▶
Check for recirculation at the air test point. The following
measured values are indicators of recirculation.
–
Oxygen value in the intake air: < 20 vol. %
– Intake air CO value: ≥ 100 ppm
▽
Recirculation is present.
▶
Eliminate the deficiencies in the air/flue pipe.
▽
No recirculation is present.
▶
Ensure that there is a heat requirement. In the
Live Monitor, check whether the product has the
status S.4 or S.14.
▶
If the combustion values are not OK, carry out check
programmes P.4 and P.14.
Conditions: and F.55 are displayed
The Live monitor shows S.40 and D.118 ≥ 1. The heat cell
is in permanent comfort protection mode.
▶
Check and, if required, replace the all-gas sensor.
9.2

Checking service messages

▶
To obtain further information, call up the Live monitor.
(→ Page 17)
Conditions: S.40 is displayed
The product is in Comfort protection mode. The product has
detected a temporary fault and continues to run with restric-
ted comfort. The product switches back to the normal operat-
ing mode.
▶
To establish whether or not a component is defective,
read the fault memory. (→ Page 27)
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
Conditions: S.86 is displayed
The product remains in comfort safety mode and does not
switch back to normal operating mode.
▶
Check the component that is mentioned and, if required,
replace it.
▶
To establish whether or not a component is defective,
read the fault memory (→ Page 27).
appears if you have set a maintenance interval, for ex-
ample, and this has passed or a service message is issued.