- 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 o
ff
.
Stored energy: after cutting o
ff
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 o
ff
). 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 o
ff
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