- 31 -
ON
DIP SW
Interface
Board
LED2
(Green)
LED1
(Red)
fi g. 36 - Location of DIP switches and LEDs on the
hydraulic unit interface board
▼
Recovering the refrigerant in the outdoor unit
Before performing any maintenance, make sure that all power supplies have been
cut off .
Stored energy: after cutting off the power supplies,
wait for 10 minutes before accessing the internal parts of the equipment.
Perform the following procedures to collect the
refrigerant.
1- Switch the ON/OFF Switch to the 0 position
(ref. 3, fi g. 9, page 13). Disconnect the outdoor unit's
power supply.
2- Remove the front panel. Open the power control box.
Then turn ON the DIP SW1 on the interface board,
3- Reconnect the power supply. Switch
the ON/OFF Switch to position 1.
(The green and red LEDs start fl ashing;
1s on / 1s off ). The outdoor unit begins cooling operation
about 3 minutes after being switched on.
4- The circulation pump starts.
5- Close the liquid valve on the outdoor unit maximum
30 secs after the outdoor unit starts.
6- Close the gas valve on the outdoor unit when the
pressure is below 0.02 relative bar read on the Manifold,
or 1-2 minutes after the liquid valve has been closed,
while the outdoor unit continues to operate.
7- Disconnect the power supply.
8- Recovery of the refrigerant is complete.
Notes :
- The pump down operation cannot be activated even
if DIP SW1 is set to ON while the heat pump is in
operation.
- Do not forget to switch DIP SW1 back to OFF after the
pump down operation has been completed.
- Select the heating mode.
- If the pump down operation fails, try the
operation again by turning the machine off and
opening the "liquid" and "gas" valves. Then after
2-3 minutes, restart the pump down operation.
Waterstage Split Comfort DHW Serie / INSTALLATION / 2125 - EN
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