12.15 Checking The Product For Leak-Tightness; 13 Troubleshooting; Comfort Protection Mode For The Heat Cell; Checking Service Messages - Vaillant ecoTEC exclusive 627 Installation And Maintenance Instructions Manual

12.15 Checking the product for leak-tightness

▶
Check that the product is leak-tight. (→ Page 30)

13 Troubleshooting

13.1

Comfort protection mode for the heat cell

Condition: 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 will exit again automatically.
Condition: 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 leakages?
▶
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.
◁
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.04 or S.14.
▶
If the combustion values are not OK, carry out check
programmes P.04 and P.14.
Condition: 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.
0020193966_04 ecoTEC exclusive Installation and maintenance instructions
13.2

Checking service messages

▶
To obtain further information, call up the Live monitor.
(→ Page 23)
Condition: 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 37)
Note
If no fault message is present, the product will
automatically switch back to normal operating
mode after a certain time.
Condition: 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 37).
appears if you have set a maintenance interval, for ex-
ample, and this has passed or a service message is issued.
13.3

Eliminating faults

▶
If fault messages (F.XX) appear, eliminate the fault by
referring to the table in the appendix or using the Func-
tion menu (→ Page 34) and the Check programmes
(→ Page 25).
Overview of fault codes (→ Page 52)
If several faults occur at the same time, the display shows
the corresponding fault messages for two seconds each in
alternation.
▶
Press (max. three times) to restart the product.
▶
If you are unable to eliminate the fault and the fault re-
curs despite reset attempts, contact customer service.
13.4

Checking the fault memory

If faults have occurred, the last ten (max.) fault messages
are available in the fault memory.
▶
Navigate to Menu → Installer level → Fault list and con-
firm by pressing .
◁
The display shows the number of faults that have
occurred, the fault numbers and the corresponding
plain text display.
▶
Press or to call up individual fault messages.
▶
Press twice to delete the fault list.
37