Maintenance routines
General
The heat pump and its ventilation ducting require some
regular maintenance when the following points should be
checked.
The numbers in brackets refer to the section “Component
locations”.
Cleaning the air filter
The heat pump's air filter needs to be cleaned regularly
(approximately 4 times per year). The cleaning time inter-
vals vary depending on the amount of dust in the exhaust
air and outdoor air.
Set the switch (8) to position • ”0”.
The upper service cover is opened by pulling the lower •
section outwards. The cover can then be lifted off.
The inner cover is secured by a magnetic strip on the •
lower edge.
Pull out the holder, take out the filter and shake off •
any dirt. (When the filter is very dirty, turn it upside-
down and wash it carefully with water.)
Check that the filter is not damaged. New original fil-•
ters can be ordered from NIBE.
Carry out assembly in reverse order.•
When cleaning the filter also check the boiler pres-•
sure, see the section “Maintenance routines”
“Pressure gauge”.
Also see “Indications on the numerical display, error code
A-01”
Maintenance routines
Cleaning the outer wall grilles
The outer grille on the outdoor air inlet should be cleaned
once a year.
Cleaning the outdoor air damper
When cleaning the outer wall grille even the outdoor air
damper in FIGHTER 640P should be cleaned. First switch
off the heat pump. Now open the upper service cover
as described in the section “Maintenance routines” –
“Cleaning the air filter”. Pull out the air filter with its hold-
er, (see the picture). The damper can now be cleaned with
a brush. Hold a cloth or similar under the damper so that
dust does not fall onto components in the fan enclosure.
Checking and cleaning the particle filter
In some cases, the heating system may contain dirt parti-
cles that are caught by the particle filter (100) in FIGHTER
640P. It is therefore important to check the filter.
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