11.3.1 Checking the safety devices
1. Check that the safety devices are operating correctly, particularly the
safety valve on the heating circuit.
2. Check the tightness of the refrigerant circuit using a sniffer.
3. Check the electrical connections.
4. Check operation of the control panel.
5. Change any and all parts and cables considered defective.
6. Check all screws and nuts (cover, support, etc.).
7. Change damaged sections of lagging.
11.3.2 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:
If the appliance is switched on, check the hydraulic pressure dis
played which alternates on the main screen of the control panel.
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.
11.3.3 Cleaning the casing
1. Clean the outside of the appliance using a damp cloth and a mild
detergent.
11.3.4 Draining the heating circuit
1. Connect a suitable hose (internal diameter: 8 mm) to the drain cock
on the heating circuit. The accessories bag supplied with the appli
ance includes a hose.
2. Open the drain valve.
3. Await the complete drainage of the heating circuit.
11.4 Specific maintenance operations
11.4.1 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).
Fig.122 Cleaning the 500 µm filter
MW-6000360-1
1
2
11 Maintenance
7685645 - v04 - 07032018
AWHP-2 iMPI
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