0020326637_00 Installation and maintenance instructions
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10 Troubleshooting
10.1
Fault messages
In the event of a fault, a fault code is shown on the display of
the indoor unit's control.
▶
Use the "Fault messages" table (
→
installation instruc-
tions for the indoor unit, Appendix).
10.2
Other faults
▶
Use the "Troubleshooting" table (
→
installation instruc-
tions for the indoor unit, Appendix).
11 Inspection and maintenance
11.1
Preparing for inspection and maintenance
▶
Only carry out the work if you are competent and have
knowledge about the special features and risks of R290
refrigerant.
Danger!
Risk of death caused by fire or explosion
if there is a leak in the refrigerant circuit!
The product contains the combustible refri-
gerant R290. In the event of a leak, escaping
refrigerant may mix with air to form a flam-
mable atmosphere. There is a risk of fire and
explosion.
▶
If you are working on the product when it
is open, before starting work, use a gas
sniffer to ensure that there is no leak.
▶
In the case of a leak: Close the product's
housing, inform the end user, and notify
customer service.
▶
Keep all ignition sources away from the
product. In particular, open flames, hot
surfaces with temperatures above 370 °C,
electrical devices that are not free from
electrical sources, static discharges.
▶
Ensure that the room is sufficiently aer-
ated around the product.
▶
Use a restriction to ensure that unauthor-
ised personnel cannot enter the protective
zone.
▶
Observe the basic safety rules before carrying out in-
spection and maintenance work or installing spare parts.
▶
When working on a flat roof, observe the occupational
safety (
→
Chapter 5.9) rules.
▶
Switch off all of the disconnectors to which the product is
connected in the building.
▶
Disconnect the product from the power supply but ensure
that the product is still earthed.
▶
When working on the product, protect all electric com-
ponents from spraying water.
11.2
Observing the work plan and intervals
▶
Comply with the specified intervals. Carry out all of the
work that is mentioned ( Appendix D).
11.3
Procuring spare parts
The original components of the unit were also certified as
part of the CE declaration of conformity. Information about
available Vaillant genuine spare parts is available by contact-
ing the contact address provided on the reverse of this docu-
ment.
▶
If you require spare parts for maintenance or repair work,
use only Vaillant genuine spare parts.
11.4
Carrying out maintenance work
11.4.1 Checking the protective zone
▶
Check whether the defined protective zone is being
maintained in the area close around the product.
(
→
Chapter 4.1)
▶
Check that no subsequent construction-related changes
or installations that violate the protective zone have been
implemented.
11.4.2 Cleaning the product
▶
Only clean the product when all of the casing sections
and covers have been installed.
▶
Do not clean the product with a high-pressure cleaner or
a direct jet of water.
▶
Clean the product using a sponge and hot water with
cleaning agent.
▶
Do not use abrasive cleaners. Do not use solvents. Do
not use any cleaning agents that contain chlorine or am-
monia.
11.4.3 Removing the casing sections
1.
Before removing the casing sections, use a gas sniffer
to check whether refrigerant is escaping.
2.
Remove the casing sections to the extent re-
quired for the subsequent maintenance work. See
(
→
Chapter 5.11.1) to (
→
Chapter 5.11.6).
