Dantherm HCV 400 P1 Service Manual page 30

Preventative maintenance, continued
Internal: Fans, air
ducts and heating
element
(2 years)
30
Follow this procedure to inspect and clean the internal parts every two years:
Step Action
1 Remove the upper part of the front cover .
2 Release the two screws at the upper left and
right corner (underneath the upper part of
the front cover) .
3 Remove the remaining part of the front
cover .
2 Pull out one of the fan boxes .
3 Carefully clean the fan's blades with com-
pressed air or a brush through the opening
at the base of the fan box . All blades must be
clean in order to maintain the fan's balance .
Be careful not to remove the small metal
balance pieces on the fan's blades as this can
cause vibrations .
4 Turn the fan with the fingers and listen to
check for murmurs from the bearing . If this
is the case, the fan will probably need to be
replaced .
5 If the unit is equipped with a heating ele-
ment: clean as much as possible without
taking the fan box apart . Inspect the heating
elements for visible damage .
6 Pull out the filter and inspect the ducts visu-
ally for dirt . If this is the case, the ducts must
be cleaned .
7 Reinsert the fan box and repeat steps 1-6
with the second fan box .
8 Ensure that all gaskets are sealed completely
before replacing the panel .
9 Check that all connections are securely connected to the PCB .
10 Mount the front panel .
Illustration