Maintenance; Indoor Unit; Checking The Operating Pressure; Overheating Protection - Bosch Compress 3400iAWS E Operation Manual

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Maintenance

DANGER
Risk of electric shock.
Grave personal injuries may occur.
▶ Disconnect the power supply before carrying out maintenance work.
Using the wrong cleaning product may damage the units!
▶ Do not use acid or chlorine based products or products that contain
abrasives.
4.1

Indoor unit

Check the following points a couple of times a year:

▶ Checking the operating pressure

▶ Overheating protection

▶ Particle filter

▶ Moisture in cooling mode
▶ Safety valves
4.1.1 Checking the operating pressure
The pressure should be checked 1-2 times per year.
▶ Check the pressure at the pressure gauge.
▶ If the pressure is less than 0.5 bar, increase the pressure slowly to
max. 2 bar by filling with water via the fill valve.
▶ If you have any questions about the procedure, consult the installer of
the system.
1
Fig. 5 AWS E indoor unit (view with drip tray)
[1] Pressure gauge
Compress 3400iAWS E – 6721852787 (2023/01)
0010036936-001
4.1.2 Overheating protection
Overheating protection is only available in indoor units with integrated
booster heater. The overheating protection has to be manually reset if it
is triggered.
To reset the overheating protection on AWS E :
▶ Contact the installer or dealer.
4.1.3 Particle filter
WARNING
Strong magnet!
Can be harmful to pacemaker wearers.
▶ Do not clean the filter or check the magnetite indicator if you are a
pacemaker wearer.
The filter prevents particles and contamination from entering the heat
pump. Over time, the filter may become blocked and must be cleaned.
The system does not need to be emptied to clean the filter. The filter is
integrated into the shut-off valve.
Cleaning the strainer
▶ Close the valve (1).
▶ Unscrew the cap (manually) (2).
▶ Take out the strainer and clean it with running water over it or by
pressure cleaning.
▶ Check attached debris on the cap's magnet (3) and clean it.
▶ Reinstall the strainer (4). For proper assembly, make sure that the
guide bumps fit into the recesses in the valve.
▶ Screw the cap back on (hand tight).
▶ Open the valve (5).
Maintenance
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