10.3.1 Checking the safety components
1. Check that the safety components are operating correctly, particularly
the safety valve on the heating circuit.
2. Check that the expansion vessel is operating correctly by checking
and adjusting the inflation pressure. France: according to DTU65.11.
3. Check the leak-tightness of the refrigerant circuit using a sniffer leak
detector.
4. Check the electrical connections.
5. Check operation of the control panel.
6. Change any and all parts and cables considered defective.
7. Check all screws and nuts (cover, support, etc.).
8. Change damaged sections of lagging.
10.3.2 Cleaning the 500 µm filters
A 500 µm filter should be fitted to the return pipe on the indoor module.
The filter is located in an isolating valve.
Clean the filters during the annual service.
1. Close the valve on the exchanger.
2. Unscrew the cover (24-mm spanner).
3. Remove the spring retaining ring.
4. Remove the filter.
5. Inspect and clean the filter. Replace it if necessary.
6. Remount the filter.
7. Tighten the connection.
8. Open the valve on the exchanger.
10.3.3 Check the hydraulic pressure
The hydraulic pressure must be at least 0.8 bar. Recommended pressure:
1.5 to 2 bar.
1. Check the hydraulic pressure in the installation:
1.1. If the appliance is switched on, check the hydraulic pressure
which is alternately displayed on the home screen of the user
interface.
1.2. If the appliance is switched off, check the hydraulic pressure on
the mechanical pressure gauge situated close to the expansion
vessel/under the cover.
2. If the hydraulic pressure is too low, top up the water.
Fig.114 Cleaning the 500 µm filter
MW-6000360-1
1
2
Fig.115 Removing the retaining ring and the
filter
MW-L000333-1
3
4
10 Maintenance
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AWHP-2 PBS-i
7706696 - v04 - 11102018