13 Repair and service
130
Installation and maintenance instructions aroTHERM plus 0020297937_01
1
2
4.
Check whether the components and pipelines are free
from dirt and corrosion.
5.
Check that the covering caps
(1)
and
(2)
on the main-
tenance connections are positioned securely.
12.10 Checking the refrigerant circuit for tightness
1.
Remove the top casing. (
→
Page 128)
2.
Remove the right-hand side casing. (
→
Page 128)
3.
Remove the front casing. (
→
Page 128)
4.
Check the refrigerant circuit for leak-tightness using
a gas sniffer. Check the individual components and
pipelines.
12.11 Checking the electrical connections and
electrical wires
1.
Remove the cover for the electrical connections.
(
→
Page 123)
2.
On the connection box, check whether the seal is un-
damaged.
3.
In the connection box, check that the electrical wire are
seated firmly in the plugs or terminals.
4.
Check the earthing in the connection box.
5.
In the connection box, check whether the power supply
cable is free from damage. If the power supply cable is
damaged and it needs to be replaced, a special power
supply cable must be used, which is available from
Vaillant or from customer service.
6.
Remove the top casing. (
→
Page 128)
7.
Remove the left-hand side casing. (
→
Page 128)
8.
Remove the right-hand side casing. (
→
Page 128)
9.
Remove the front casing. (
→
Page 128)
10. In the unit, check that the electrical wire are seated
firmly in the plugs or terminals.
11. In the unit, check whether the electrical wires are free
from damage.
12.12 Checking the small damping feet for wear
1.
Check whether the small damping feet are significantly
compressed.
2.
Check whether the small damping feet have significant
cracks.
3.
Check whether there is substantial corrosion on the
screwed connection for the small damping feet.
Condition
: Replacement required
▶
Procure and install new damping feet.
12.13 Completing inspection and maintenance
▶
Installing the casing sections.
▶
Switch on the power supply and the product.
▶
Start up the product.
▶
Carry out an operational test and a safety test.
12.14 Installing the casing sections
12.14.1 Installing the air inlet grille
1.
Secure the air inlet grille by lowering it into the stop.
2.
Secure the screws at the right- and left-hand edge.
3.
Install the two cross-members.
4.
Establish the connection to the temperature sensor.
12.14.2 Installing the air outlet grille
1.
Slide the air outlet grille vertically downwards from
above.
2.
Secure the screws at the right-hand edge.
12.14.3 Installing the front casing
1.
Secure the front casing by lowering it into the stop.
2.
Secure the screws onto the upper edge.
12.14.4 Installing the side casing
1.
Secure the side casing by lowering it into the stop.
2.
Secure the screws onto the upper edge.
12.14.5 Installing the top casing
1.
Fit the top casing.
2.
Secure the screws at the right- and left-hand edge.
13 Repair and service
13.1
Preparing repair and service work on the
refrigerant circuit
Only carry out work if you have specific expert refrigeration
knowledge and are competent at handling R290 refrigerant.
