Maintenance Of The Installation; Hydraulic Checks; Checking The Outdoor Unit; Maintenance - Fujitsu Waterstage WOYA060LFCA Installation And Operating Manual

Air to Water Heat Pump, split system

11 Maintenance of the installation

Ensure that the general electrical power supply has
been cut off before starting any repair work.

11 .1 Hydraulic checks

" Warning : If frequent refills are required it is
essential that you look for any leaks.
If filling and re-pressurization are required,
check what type of fluid has been used initially.
Recommended filling pressure: 1 to 2 bar (Precise
filling pressure is determined by the manometric height
of the installation).
Each year,
- Check the expansion vessel pressure (precharge 1 bar)
and the correct functioning of the safety valve.
If the installation is fitted with a DHW tank:
- Verify the safety unit on the cold water supply inlet.
Make it work as prescribed by the manufacturer.
- Check the shut-off.

12 Maintenance

12 .1 Emptying the hydraulic unit

- Remove the front panel from the hydraulic unit.
- Open the emptying valve,
- Open the hydraulic unit's manual bleed-tap,
- Open the installation bleed tap.
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11 .2 Checking the outdoor unit

- Dust off the heat exchanger if necessary, being careful
not to damage the fins.
- Straighten the vanes using a comb.
- Check that there is nothing obstructing the passage
of air.
- Check the fan.
- Verify that condensate drain is not obstructed.
• Checking the refrigeration circuit
- When the refrigerant charge is in excess of 2kg
(models >10kW) it is compulsory to have an approved
after sales service check the refrigeration circuit every
year (with a certificate of capacity for the handling of
refrigerants) (see para. 2.1, page 13).
- Check the lack of leak (connections, valves...).

11 .3 Electrical checks

- Check connections and possible tightening.
- Check the cables condition and electronic boards.

12 .2 Distribution valve

If the installation is fitted with a DHW tank.
Carefully comply with the direction for fitting the
distribution valve.
Channel AB : Inlet to the hydraulic unit .
Open channel A : Return from DHW tank.
Open channel B : Return from the heating circuit.
Installation and operation manual "1764 - EN"